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ICS84021中文资料

84021AY

https://www.wendangku.net/doc/c618448234.html,/products/hiperclocks.html

REV . A NOVEMBER 7, 2003

Integrated Circuit

Systems, Inc.

ICS84021

260MH Z , C RYSTAL -TO -LVCMOS / LVTTL

F REQUENCY S YNTHESIZER

G ENERAL D ESCRIPTION

The ICS84021 is a general purpose, Crystal-to-LVCMOS/LVTTL High Frequency Synthesizer

and a member of the HiPerClockS ? family of High Performance Clock Solutions from ICS. The ICS84021 has a selectable TEST_CLK or crys-tal input. The VCO operates at a frequency range of 620MHz to 780MHz. The VCO frequency is programmed in steps equal to the value of the input reference or crystal frequency.The VCO and output frequency can be programmed using the serial or parallel interface to the configuration logic. The low phase noise characteristics of the ICS84021 make it an ideal clock source for Gigabit Ethernet, SONET, Fibre Chan-nel 1 and 2, and Infiniband applications.

B LOCK D IAGRAM

P IN A SSIGNMENT

F EATURES

?2 LVCMOS/LVTTL outputs

?Selectable crystal oscillator interface or LVCMOS/LVTTL TEST_CLK

?Output frequency range: 103.3MHz to 260MHz ?Crystal input frequency range: 14MHz to 40MHz ?VCO range: 620MHz to 780MHz

?Parallel or serial interface for programming counter and output dividers ?RMS period jitter: 4.3ps (typical) (N ÷ 4, V DDO = 3.3V ± 5%)?RMS phase jitter at 155.52MHz, using a 38.88MHz crystal (12KHz to 20MHz): 2.88ps (typical)Phase noise: 155.52MHz Offset Noise Power 100Hz.................-93.7 dBc/Hz 1KHz...............-111.3 dBc/Hz 10KHz...............-120.4 dBc/Hz 100KHz...............-125.1 dBc/Hz

?Full 3.3V or mixed 3.3V core/2.5V or 1.8V supply voltage ?0°C to 70°C ambient operating temperature

?Industrial temperature information available upon request

32 31 30 29 28 27 26 25

9 10 11 12 13 14 15 16

12345678

2423222120191817

XT AL2TEST_CLK XT AL_SEL V DDA S_LOAD S_DA T A S_CLOCK MR

M5M6M7M8N0N1nc GND

GND

V DDO

OE0

OE1

V DD

TEST

XT AL1

nP_LOAD

VCO_SEL

32-Lead LQFP

7mm x 7mm x 1.4mm package body

Y Package Top View

ICS84021

XT XT XT 元器件交易网https://www.wendangku.net/doc/c618448234.html,

84021AY

https://www.wendangku.net/doc/c618448234.html,/products/hiperclocks.html

REV . A NOVEMBER 7, 2003

Integrated Circuit

Systems, Inc.

ICS84021

260MH Z , C RYSTAL -TO -LVCMOS / LVTTL

F REQUENCY S YNTHESIZER

M divider and N output divider to a specific default state that will automatically occur during power-up. The TEST output is LOW when operating in the parallel input mode. The relationship be-tween the VCO frequency, the crystal frequency and the M di-vider is defined as follows:The M value and the required values of M0 through M8 are shown in Table 3B, Programmable VCO Frequency Function Table. Valid M values for which the PLL will achieve lock for a 25MHz reference are defined as 25 ≤ M ≤ 31. The frequency out is defined as follows:Serial operation occurs when nP_LOAD is HIGH and

S_LOAD is LOW. The shift register is loaded by sampling the S_DATA bits with the rising edge of S_CLOCK. The con-tents of the shift register are loaded into the M divider and N output divider when S_LOAD transitions from LOW-to-HIGH.The M divide and N output divide values are latched on the HIGH-to-LOW transition of S_LOAD. If S_LOAD is held HIGH,data at the S_DATA input is passed directly to the M divider and N output divider on each rising edge of S_CLOCK. The serial mode can be used to program the M and N bits and test bits T1 and T0. The internal registers T0 and T1 deter-mine the state of the TEST output as follows:

F UNCTIONAL D ESCRIPTION

fVCO = fxtal x M

T1T0TEST Output

00LOW

01S_DATA, Shift Register Input

10Output of M divider

CMOS Fout

F IGURE 1. P ARALLEL & S ERIAL L OAD O PERATIONS

*NOTE: The NULL timing slot must be observed.

ERIAL OADING

FOUT = fVCO = fxtal x M

N N S_DA T NOTE: The functional description that follows describes op-eration using a 25MHz crystal. Valid PLL loop divider values for different crystal or input frequencies are defined in the Input Frequency Characteristics, Table 5, NOTE 1.

The ICS84021 features a fully integrated PLL and therefore requires no external components for setting the loop band-width. A fundamental crystal is used as the input to the on-chip oscillator. The output of the oscillator is fed into the phase detector. A 25MHz crystal provides a 25MHz phase detector reference frequency. The VCO of the PLL operates over a range of 620MHz to 780MHz. The output of the M divider is also applied to the phase detector.

The phase detector and the M divider force the VCO output frequency to be M times the reference frequency by adjusting the VCO control voltage. Note that for some values of M (either too high or too low), the PLL will not achieve lock. The output of the VCO is scaled by a divider prior to being sent to each of the LVCMOS output buffers. The divider provides a 50% out-put duty cycle.

The programmable features of the ICS84021 support two input modes to program the M divider and N output divider. The two input operational modes are parallel and serial. Figure 1 shows the timing diagram for each mode. In parallel mode, the nP_LOAD input is initially LOW. The data on inputs M0 through M8 and N0 and N1 is passed directly to the M divider and N output divider. On the LOW-to-HIGH transition of the nP_LOAD input, the data is latched and the M divider remains loaded until the next LOW transition on nP_LOAD or until a serial event oc-curs. As a result, the M and N bits can be hardwired to set the

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84021AY

https://www.wendangku.net/doc/c618448234.html,/products/hiperclocks.html

REV . A NOVEMBER 7, 2003

Integrated Circuit

Systems, Inc.

ICS84021

260MH Z , C RYSTAL -TO -LVCMOS / LVTTL

F REQUENCY S YNTHESIZER

T ABLE 1. P IN D ESCRIPTIONS

r e b m u N e m a N e p y T n

o i t p i r c s e D 15

M t u p n I p

u l l u P n

o i t i s n a r t H G I H -o t -W O L n o d e h c t a l a t a D .s t u p n i r e d i v i d M .s l e v e l e c a f r e t n i L T T V L /S O M C V L .t u p n i D A O L _P n f o ,4,3,2,92,8223,13,03,8M ,7M ,6M ,1M ,0M 4M ,3M ,2M t u p n I n w o d l l u P 6,51N ,0N t u p n I n

w o d l l u P ,C 3e l b a T n i d e n i f e d s a e u l a v r e d i v i d t u p t u o s e n i m r e t e D .s l e v e l e c a f r e t n i L T T V L /S O M C V L .e l b a T n o i t c n u F 7c n d e s u n U .

t c e n n o c o N 61,8D N G r e w o P .

d n u o r g y l p p u s r

e w o P 9T S E T t u p t u O t u p t u O .n o i t a r e p o

f o e d o m l a i r e s e h t n i E V I T C A s i h c i h w t u p t u o t s e T .s l e v e l e c a f r e t n i L T T V L /S O M C V L .e d o m l e l l a r a p n i W O L n e v i r d 01V D D r e w o P .

n i p y l p p u s e r o C 21,110E O ,1E O t u p n I p u l l u P .)t l u a f e d (d e l b a n e e r a s t u p t u o e h t ,H G I H c i g o l n e h W .e l b a n e t u p t u O ,E 3e l b a T e e S .e t a t S -i r T n i e r a s t u p t u o e h t ,W O L c i g o l n e h W .s l e v e l e c a f r e t n i L T T V L /S O M C V L .e l b a T n o i t c n u F E O 31V O D D r e w o P .

n i p y l p p u s t u p t u O 5

1,411

Q ,0Q t

u p t u O .

s l e v e l e c a f r e t n i L T T V L /S O M C V L .s t u p t u o k c o l C 71R M t u p n I n

w o d l l u P s r e d i v i d l a n r e t n i e h t ,H G I H c i g o l n e h W .t e s e R r e t s a M h g i H e v i t c A e h t ,W O L c i g o l n e h W .w o l o g o t s t u p t u o e h t g n i s u a c t e s e r e r a R M f o n o i t r e s s A .d e l b a n e e r a s t u p t u o e h t d n a s r e d i v i d l a n r e t n i .s e u l a v T d n a ,N ,M d e d a o l t c e f f e t o n s e o d .

s l e v e l e c a f r e t n i L T T V L /S O M C V L 81K C O L C _S t u p n I n w o d l l u P r e t s i g e r t f i h s e h t o t n i t u p n i A T A D _S t a t n e s e r p a t a d l a i r e s n i s k c o l C .s l e v e l e c a f r e t n i L T T V L /S O M C V L .K C O L C _S f o e g d e g n i s i r e h t n o 91A T A D _S t u p n I n w o d l l u P f o e g d e g n i s i r e h t n o d e l p m a s a t a D .t u p n i l a i r e s r e t s i g e r t f i h S .

s l e v e l e c a f r e t n i L T T V L /S O M C V L .K C O L C _S 02D A O L _S t u p n I n

w o d l l u P .s r e d i v i d e h t o t n i r e t s i g e r t f i h s m o r f a t a d f o n o i t i s n a r t s l o r t n o C .s l e v e l e c a f r e t n i L T T V L /S O M C V L 12V A D D r e w o P .

n i p y l p p u s g o l a n A 22L E S _L A T X t u p n I p u l l u P .e c r u o s e c n e r e f e r L L P e h t s a s t u p n i t s e t r o l a t s y r c n e e w t e b s t c e l e S .W O L n e h w K L C _T S E T s t c e l e S .H G I H n e h w s t u p n i L A T X s t c e l e S s

l e v e l e c a f r e t n i L T T V L /S O M C V L 32K L C _T S E T t u p n I n

w o d l l u P .s l e v e l e c a f r e t n i L T T V L /S O M C V L .t u p n i k c o l c t s e T 52,421L A T X ,2L A T X t u p n I .t u p t u o e h t s i 2L A T X .t u p n i e h t s i 1L A T X .e c a f r e t n i r o t a l l i c s o l a t s y r C 62D A O L _P n t u p n I n w o d l l u P s

i 0M :8M t a t n e s e r p a t a d n e h w s e n i m r e t e D .t u p n i d a o l l e l l a r a P e

h t s t e s 0N :1N t a t n e s e r p a t a d n e h w d n a ,r e d i v i d M o t n i d e d a o l .s l e v e l e c a f r e t n i L T T V L /S O M C V L .e u l a v r e d i v i d t u p t u o N 7

E S _O C V t

u p n I p

u l l u P .

e d o m s s a p y b r o L L P n i s i r e z i s e h t n y s r e h t e h w s e n i m r e t e D .

s l e v e l e c a f r e t n i L T T V L /S O M C V L :E T O N p u l l u P d n a n w o d l l u P .

s e u l a v l a c i p y t r o f ,s c i t s i r e t c a r a h C n i P ,2e l b a T e e S .s r o t s i s e r t u p n i l a n r e t n i o t r e f e r 元器件交易网https://www.wendangku.net/doc/c618448234.html,

84021AY

https://www.wendangku.net/doc/c618448234.html,/products/hiperclocks.html

REV . A NOVEMBER 7, 2003

Integrated Circuit

Systems, Inc.

ICS84021

260MH Z , C RYSTAL -TO -LVCMOS / LVTTL

F REQUENCY S YNTHESIZER

T ABLE 3A. P ARALLEL AND S ERIAL M ODE F UNCTION T ABLE

t u p n I s

n o i t i d n o C R M D

A O L _P n M N D

A O L _S K

C O L C _S A

T A D _S H X X X X X X .

W O L s t u p t u o s e c r o F .t e s e R L L a t a D a t a D X X X M

e h t o t y l t c e r i d d e s s a p s t u p n i N d n a M n o a t a D .W O L d e c r o

f t u p t u o T S E T .r e d i v i d t u p t u o N d n a r e d i v i d L ↑a t a D a t a D L X X d e d a o l s n i a m e r d n a s r e t s i

g e r t u p n i o t n i d e

h c t a l s

i a t a D .s r u c c o t n e v e l a i r e s a l i t n u r o n o i t i s n a r t W O L t x e n l i t n u L H X X L ↑a t a D n o a t a d h t i w d e d a o l s i r e t s i g e r t f i h S .e d o m t u p n i l a i r e S .K C O L C _S f o e g d e g n i s i r h c a e n o A T A D _S L H X X ↑L a t a D e h t o t d e s s a p e r a r e t s i g e r t f i h s e h t f o s t n e t n o C .

r e d i v i d t u p t u o N d n a r e d i v i d M L H X X ↓L a t a D .d e h c t a l e r a s e u l a v r e d i v i d t u p t u o N d n a r e d i v i d M L H X X L X X .s r e t s i g e r t f i h s t c e f f a t o n o d t u p n i l a i r e s r o l e l l a r a P L

↑

t a D .

d e k c o l c s i t i s a r e d i v i d M o t y l t c e r i d d e s s a p A T A D _S W

O L =L :E T O N H G I H =H e

r a c t 'n o D =X ↑n o i t i s n a r t e g d e g n i s i R =↓n

o i t i s n a r t e g d e g n i l l a F =T ABLE 3B. P ROGRAMMABLE VCO F REQUENCY F UNCTION T ABLE (NOTE 1)

c n e u q e r F O C V )

z H M (e d i v i D M 65282146236184218M 7M 6M 5M 4M 3M 2M 1M 0M 52652000011001???????????00782000011100?

?5771300001111

y c n e u q e r f t u p n i K L C _T S E T r o l a t s y r c o t d n o p s e r r o c s e i c n e u q e r f g n i t l u s e r e h t d n a s e u l a v e d i v i d M e s e h T :1E T O N .

z H M 52f o T ABLE 2. P IN C HARACTERISTICS

l o b m y S r e t e m a r a P s n o i t i d n o C t s e T m

u m i n i M l a c i p y T m

u m i x a M s t i n U C N I e

c n a t i c a p a C t u p n I 4F p C D P e c n a t i c a p a C n o i t a p i s s i D r e w o P )

t u p t u o r e p (V D D V ,A D D V ,O D D V 564.3=51F p V D D V ,A D D V ,V 564.3=O D D V 526.2=51F p V D D V ,A D D V ,V 564.3=O D D V

98.1=02F p R P U L L U P r o t s i s e R p u l l u P t u p n I 15K ?R N

W O D L L U P r

o t s i s e R n w o d l l u P t u p n I 1

5K ?

元器件交易网https://www.wendangku.net/doc/c618448234.html,

84021AY

https://www.wendangku.net/doc/c618448234.html,/products/hiperclocks.html

REV . A NOVEMBER 7, 2003

Integrated Circuit

Systems, Inc.

ICS84021

260MH Z , C RYSTAL -TO -LVCMOS / LVTTL

F REQUENCY S YNTHESIZER

T ABLE 3C. P ROGRAMMABLE O UTPUT D IVIDER F UNCTION T ABLE (PLL E NABLED )

T ABLE 3E. O UTPUT E NABLE & C LOCK E NABLE F UNCTION T ABLE

s t u p n I l o r t n o C t

u p t u O 0E O 1E O 0Q 1Q 00Z -i H Z -i H 01Z -i H d e l b a n E 10d e l b a n E Z -i H 1

e l b a n E d

e l b a n E T ABLE 3D. C OMMONL Y U SED C ONFIGURATION F UNCTION T ABLE

u p n I )

z H M (y c n e u q e r F t u p t u O )

z H M (l a t s y r C e

u l a V r e d i v i D M e

u l a V r e d i v i D N 44.9123425.55152135.9123452.6515252452.6515252552105.5252305.21205.52524573.95105.5252652.6018

8.836

5.551s t u p n I e

u l a V r e d i v i D N )z H M (y c n e u q e r F t u p t u O 1N 0N m u m i n i M m u m i x a M 0037.6020620145515911054216511

.3010

31元器件交易网https://www.wendangku.net/doc/c618448234.html,

84021AY

https://www.wendangku.net/doc/c618448234.html,/products/hiperclocks.html

REV . A NOVEMBER 7, 2003

Integrated Circuit

Systems, Inc.

ICS84021

260MH Z , C RYSTAL -TO -LVCMOS / LVTTL

F REQUENCY S YNTHESIZER

T ABLE 4A. P OWER S UPPL Y DC C HARACTERISTICS , V DD =V DDA =3.3V±5%, V DDO =3.3V±5%, 2.5V±5% OR 1.8V±5%, T A =0°C TO 70°C

l o b m y S r

e t e m a r a P s

n o i t i d n o C t s e T m u m i n i M l a c i p y T m u m i x a M s t i n U V D D e g a t l o V y l p p u S e r o C 531.33.3564.3V V A D D e g a t l o V y l p p u S g o l a n A 531.33.3564.3V V O D D e g a t l o V y l p p u S t u p t u O 531.33.3564.3V 573.25.2526.2V 1

7.18

.198.1V I D D t n e r r u C y l p p u S r e w o P 041A m I A D D t n e r r u C y l p p u S g o l a n A 52A m I O

D D t

n e r r u C y l p p u S t u p t u O 5

m A BSOLUTE M AXIMUM R ATINGS

Supply Voltage, V DD 4.6V

Inputs, V I -0.5V to V DD + 0.5 V Outputs, V O

-0.5V to V DDO + 0.5V

Package Thermal Impedance, θJA 47.9°C/W (0 lfpm)Storage Temperature, T STG

-65°C to 150°C

NOTE: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These ratings are stress specifications only. Functional operation of product at these conditions or any conditions beyond those listed in the DC Characteristics or AC Charac-teristics is not implied. Exposure to absolute maximum rating conditions for extended periods may affect product reliability.

元器件交易网https://www.wendangku.net/doc/c618448234.html,

84021AY

https://www.wendangku.net/doc/c618448234.html,/products/hiperclocks.html

REV . A NOVEMBER 7, 2003

Integrated Circuit

Systems, Inc.

ICS84021

260MH Z , C RYSTAL -TO -LVCMOS / LVTTL

F REQUENCY S YNTHESIZER

T ABLE 4B. LVCMOS / LVTTL DC C HARACTERISTICS ,V DD =V DDA =3.3V±5%,

V DDO =3.3V±5%, 2.5V±5% OR 1.8V±5%, T A =0°C TO 70°C

o b m y S r e t e m a r a P s

n o i t i d n o C t s e T m

u m i n i M l

a c i p y T m u m i x a M s t i n U V H

I t

u p n I e

g a t l o V h g i H ,R M ,L E S _L A T X ,L E S _O C V ,A T A D _S ,D A O L _P n ,D A O L _S ,1E O ,0E O ,K C O L C _S 8M :0M ,1N :0N 2V D D 3.0+V K

L C _T S E T 2V D D 3.0+V V L

I t

u p n I e

g a t l o V w o L ,R M ,L E S _L A T X ,L E S _O C V ,A T A D _S ,D A O L _P n ,D A O L _S ,1E O ,0E O ,K C O L C _S 8M :0M ,1N :0N 3.0-8.0V K

L C _T S E T 3

.0-3.1V I H

I t

u p n I t

n e r r u C h g i H ,R M ,1N ,0N ,8M -6M ,4M -0M ,

K L C _T S E T ,K C O L C _S D A O L _P n ,D A O L _S ,A T A D _S V D D V =N I V 564.3=051A μ,

1E O ,0E O ,5M L

E S _O C V ,L E S _L A T X V D D V =N I V 564.3=5

A μI L

I t

u p n I t

n e r r u C w o L ,R M ,1N ,0N ,8M -6M ,4M -0M ,

K L C _T S E T ,K C O L C _S D A O L _P n ,D A O L _S ,A T A D _S V D D ,V 564.3=V N I V 0=5-A μ,

1E O ,0E O ,5M L

E S _O C V ,L E S _L A T X V D D ,V 564.3=V N I V 0=051-A μV H

O 1

E T O N ;e g a t l o V h g i H t u p t u O V O D D %

5±V 3.3=6.2V V O D D %5±V 5.2=8.1V V O D D %5±V 8.1=V O D D 3

.0-V V L

O 1

E T O N ;e g a t l o V w o L t u p t u O V O D D %

5±V 3.3=5.0V V O D D %5±V 5.2=5.0V V O D D %

5±V 8.1=4

.0V

NOTE 1: Outputs terminated with 50? to V DDO /2. See Parameter Measurement Section, “Load T est Circuit Diagrams”.

T ABLE 5. I NPUT F REQUENCY C HARACTERISTICS , V DD = V DDA = V DDO = 3.3V±5%, T A = 0°C TO 70°C

l o b m y S r

e t e m a r a P s

n o i t i d n o C t s e T m

u m i n i M l

a c i p y T m

u m i x a M s t i n U f N

I y

c n e u q e r F t u p n I 1

E T O N ;K L C _T S E T 4104z H M 1

E T O N ;2L A T X ,1L A T X 4

H M K C O L C _S 05z

H M n i h t i w e t a r e p o o t O C V e h t r o f t e s e b t s u m e u l a v M e h t ,e g n a r y c n e u q e r f K L C _T S E T d n a l a t s y r c t u p n i e h t r o F :1E T O N 54e r a M f o s e u l a v d i l a v ,z H M 41f o y c n e u q e r f t u p n i m u m i n i m e h t g n i s U .e g n a r z H M 087o t z H M 026e h t ≤M ≤.5561e r a M f o s e u l a v d i l a v ,z H M 04f o y c n e u q e r f m u m i x a m e h t g n i s U ≤M ≤.

91T ABLE 6. C RYSTAL C HARACTERISTICS

r e t e m a r a P s n o i t i d n o C t s e T m

u m i n i M l a c i p y T m

u m i x a M s t i n U n o i t a l l i c s O f o e d o M l

a t n e m a d n u F y

c n e u q e r F 4

104z H M )R S E (e c n a t s i s e R s e i r e S t n e l a v i u q E 05?C (e c n a t i c a p a C t n u h S O )

p 元器件交易网https://www.wendangku.net/doc/c618448234.html,

84021AY

https://www.wendangku.net/doc/c618448234.html,/products/hiperclocks.html

REV . A NOVEMBER 7, 2003

Integrated Circuit

Systems, Inc.

ICS84021

260MH Z , C RYSTAL -TO -LVCMOS / LVTTL

F REQUENCY S YNTHESIZER

l o b m y S r e t e m a r a P s

n o i t i d n o C t s e T m u m i n i M l

a c i p y T m u m i x a M s t i n U F T

U O y

c n e u q e r F t u p t u O 3

.301062z H M t )r e p (t i j 1

E T O N ;S M R ,r e t t i J d o i r e P N ÷34.68s p N ÷43.48s p N ÷52.47s p N ÷69

21s p t )o (k s 3,2E T O N ;w e k S t u p t u O 0

9s p t R t /F e

m i T l l a F /e s i R t u p t u O %

08o t %020030

08s p t S

m i T p u t e S D

A O L _P n o t N ,M 5s n K C O L C _S o t A T A D _S 5s n D A O L _S o t K C O L C _S 5s n t H e m i T d l o H D

A O L _P n o t N ,M 5s n K C O L C _S o t A T A D _S 5s n D

A O L _S o t K C O L C _S 5s n c

d o e

l c y C y t u D t u p t u O 5

t K

C O L e m i T k c o L L L P 1s m .n o i t c e s n o i t a m r o f n I t n e m e r u s a e M r e t e m a r a P e e S .

s t u p n i L A T X g n i s u e c n a m r o f r e p r e t t i J :1E T O N V t a d e r u s a e M .s n o i t i d n o c d a o l l a u q e h t i w d n a e g a t l o v y l p p u s e m a s e h t t a s t u p t u o n e e w t e b w e k s s a d e n i f e D :2E T O N O D D .2/.

56d r a d n a t S C E D E J h t i w e c n a d r o c c a n i d e n i f e d s i r e t e m a r a p s i h T :3E T O N T ABLE 7B. AC C HARACTERISTICS , V DD = V DDA = 3.3V±5%, V DDO = 2.5V±5%, T A = 0°C TO 70°C

l o b m y S r e t e m a r a P s

n o i t i d n o C t s e T m u m i n i M l

a c i p y T m u m i x a M s t i n U F T

U O y

c n e u q e r F t u p t u O 3

.301062z H M t )r e p (t i j 1

E T O N ;S M R ,r e t t i J d o i r e P N ÷3

5.701s p N ÷43.47s p N ÷51.46s p N ÷6

.2161s p t )o (k s 3,2E T O N ;w e k S t u p t u O 0

01s p t R t /F e

m i T l l a F /e s i R t u p t u O %

08o t %020030

08s p t S

m i T p u t e S D

A O L _P n o t N ,M 5s n K C O L C _S o t A T A D _S 5s n D A O L _S o t K C O L C _S 5s n t H e m i T d l o H D

A O L _P n o t N ,M 5s n K C O L C _S o t A T A D _S 5s n D

A O L _S o t K C O L C _S 5s n c

d o e

l c y C y t u D t u p t u O 5

t K

C O L e m i T k c o L L L P 1s m .n o i t c e s n o i t a m r o f n I t n e m e r u s a e M r e t e m a r a P e e S .

56d r a d n a t S C E D E J h t i w e c n a d r o c c a n i d e n i f e d s i r e t e m a r a p s i h T :3E T O N T ABLE 7A. AC C HARACTERISTICS , V DD = V DDA = V DDO = 3.3V±5%, T A = 0°C TO 70°C

元器件交易网https://www.wendangku.net/doc/c618448234.html,

84021AY

https://www.wendangku.net/doc/c618448234.html,/products/hiperclocks.html

REV . A NOVEMBER 7, 2003

Integrated Circuit

Systems, Inc.

ICS84021

260MH Z , C RYSTAL -TO -LVCMOS / LVTTL

F REQUENCY S YNTHESIZER

T ABLE 7C. AC C HARACTERISTICS , V DD = V DDA = 3.3V±5%, V DDO = 1.8V±5%, T A = 0°C TO 70°C

l o b m y S r e t e m a r a P s

n o i t i d n o C t s e T m u m i n i M l

a c i p y T m u m i x a M s t i n U F T

U O y

c n e u q e r F t u p t u O 3

.301062z H M t )r e p (t i j 1

E T O N ;S M R ,r e t t i J d o i r e P N ÷3

8.68s p N ÷45.48s p N ÷52.46s p N ÷6

.801s p t )o (k s 3,2E T O N ;w e k S t u p t u O 0

21s p t R t /F e

m i T l l a F /e s i R t u p t u O %

08o t %020030

08s p t S

m i T p u t e S D

A O L _P n o t N ,M 5s n K C O L C _S o t A T A D _S 5s n D A O L _S o t K C O L C _S 5s n t H e m i T d l o H D

A O L _P n o t N ,M 5s n K C O L C _S o t A T A D _S 5s n D

A O L _S o t K C O L C _S 5s n c

d o e

l c y C y t u D t u p t u O 2

t K

C O L e m i T k c o L L L P 1s m .n o i t c e s n o i t a m r o f n I t n e m e r u s a e M r e t e m a r a P e e S .

56d r a d n a t S C E D E J h t i w e c n a d r o c c a n i d e n i f e d s i r e t e m a r a p s i h T :3E T O N 元器件交易网https://www.wendangku.net/doc/c618448234.html,

84021AY

https://www.wendangku.net/doc/c618448234.html,/products/hiperclocks.html

REV . A NOVEMBER 7, 2003

Integrated Circuit

Systems, Inc.

ICS84021

260MH Z , C RYSTAL -TO -LVCMOS / LVTTL

F REQUENCY S YNTHESIZER

P ARAMETER M EASUREMENT I NFORMATION

元器件交易网https://www.wendangku.net/doc/c618448234.html,

84021AY

https://www.wendangku.net/doc/c618448234.html,/products/hiperclocks.html

REV . A NOVEMBER 7, 2003

Integrated Circuit

Systems, Inc.

ICS84021

260MH Z , C RYSTAL -TO -LVCMOS / LVTTL

F REQUENCY S YNTHESIZER

C RYSTAL I NPUT I NTERFACE

The ICS84021 has been characterized with 18pF parallel resonant crystals. The capacitor values, C1 and C2, shown in Figure 3 below were determined using a 25MHz, 18pF

parallel resonant crystal and were chosen to minimize the ppm error. The optimum C1 and C2 values can be slightly adjusted for different board layouts.

A PPLICATION I NFORMATION

As in any high speed analog circuitry, the power supply pins are vulnerable to random noise. The ICS84021 provides separate power supplies to isolate any high switching noise from the outputs to the internal PLL. V DD , V DDA , and V DDO should be individually connected to the power supply plane through vias, and bypass capacitors should be used for each pin. To achieve optimum jitter performance,power supply isolation is required. Figure 2 illustrates how a 24? resistor along with a 10μF and a .01μF bypass capacitor should be connected to each V DDA pin.

IGURE OWER UPPLY ILTERING

P OWER S UPPL Y F ILTERING T ECHNIQUES

元器件交易网https://www.wendangku.net/doc/c618448234.html,

84021AY

https://www.wendangku.net/doc/c618448234.html,/products/hiperclocks.html

REV . A NOVEMBER 7, 2003

Integrated Circuit

Systems, Inc.

ICS84021

260MH Z , C RYSTAL -TO -LVCMOS / LVTTL

F REQUENCY S YNTHESIZER

R ELIABILITY I NFORMATION

T RANSISTOR C OUNT

The transistor count for ICS84021 is: 4325

T ABLE 8. θJA VS . A IR F LOW T ABLE FOR 32 L EAD LQFP

θJA by Velocity (Linear Feet per Minute)

200

500

Single-Layer PCB, JEDEC Standard Test Boards 67.8°C/W 55.9°C/W 50.1°C/W Multi-Layer PCB, JEDEC Standard Test Boards

47.9°C/W

42.1°C/W

39.4°C/W

NOTE: Most modern PCB designs use multi-layered boards. The data in the second row pertains to most designs.

元器件交易网https://www.wendangku.net/doc/c618448234.html,

84021AY

https://www.wendangku.net/doc/c618448234.html,/products/hiperclocks.html

REV . A NOVEMBER 7, 2003

Integrated Circuit

Systems, Inc.

ICS84021

260MH Z , C RYSTAL -TO -LVCMOS / LVTTL

F REQUENCY S YNTHESIZER

P ACKAGE O UTLINE - Y S UFFIX FOR 32 L EAD LQFP

T ABLE 9. P ACKAGE D IMENSIONS

Reference Document: JEDEC Publication 95, MS-026

O I T A I R A V C E D E J S

R E T E M I L L I M N I S N O I S N E M I D L L A L

O B M Y S A

B B M

U M I N I M L

A N I M O N M

U M I X A M N 23A ----06.11A 50.0--51.02A 53.104.154.1b 03.073.054.0c 9

0.0--02.0D C I S A B 00.91D C I S A B 00.72D .f e R 06.5E C I S A B 00.91E C I S A B 00.72E .f e R 06.5e C

I S A B 08.0L 54.006.057.0θ0°--7°c

c c ----01.0元器件交易网https://www.wendangku.net/doc/c618448234.html,

84021AY

https://www.wendangku.net/doc/c618448234.html,/products/hiperclocks.html

REV . A NOVEMBER 7, 2003

Integrated Circuit

Systems, Inc.

ICS84021

260MH Z , C RYSTAL -TO -LVCMOS / LVTTL

F REQUENCY S YNTHESIZER

T ABLE 10. O RDERING I NFORMATION

While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems, Incorporated (ICS) assumes no responsibility for either its use or for infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use in normal commercial applications. Any other applications such as those requiring extended temperature range, high reliability, or other extraordinary environmental requirements are not recom-mended without additional processing by ICS. ICS reserves the right to change any circuitry or specifications without notice. ICS does not authorize or warrant any ICS product for use in life support devices or critical medical instruments.r

e b m u N r e d r O /t r a P g n i k r a M e g a k c a P t n u o C e r u t a r e p m e T Y A 12048S C I Y A 12048S C I P

F Q L d a e L 23y

a r t r e p 052C °07o t C °0T

Y A 12048S C I Y

A 12048S C I l

e e R d n a e p a T n o P F Q L d a e L 230

001C

°07o t C °0元器件交易网https://www.wendangku.net/doc/c618448234.html,