HD74BC374A
Octal D Type Flip Flops With 3 State Outputs
REJ03D0284–0300Z
(Previous ADE-205-010A (Z))
Rev.3.00
Jul.16.2004 Description
The HD74BC374A provides high drivability and operation equal to or better than high speed bipolar standard logic IC by using Bi-CMOS process. The device features low power dissipation that is about 1/5 of high speed bipolar logic IC, when the frequency is 10 MHz. The device has eight edge triger D type flip flop with three state outputs in a 20 pin package. Data at the D inputs meeting set up reguirements, are transferred to the Q outputs on positive going transitions of the clock input. When the latch enable goes low, data at the D inputs will be retained at the outputs until latch enable returns high again. When a high logic level is applied to the output control input, all outputs go to a high impedance state, regardless of what signals are present at the other inputs and the state of the storage elements.
Features
?Input/Output are at high impedance state when power supply is off.
?Built in input pull up circuit can make input pins be open, when not used.
?TTL level input
?Wide operating temperature range
Ta = –40 to + 85°C
?Ordering Information
Part Name Package Type Package Code Package
Abbreviation Taping Abbreviation
(Quantity)
HD74BC374AFPEL SOP-20 pin (JEITA)FP-20DAV FP EL (2,000 pcs/reel) Function Table
L:Low level
X:Immaterial
Z:High impedance
:Low to high transition
Pin Arrangement
Absolute Maximum Ratings
Item
Symbol
Rating
Unit
Supply voltage V CC –0.5 to +7.0V Input diode current I IK ±30mA Input voltage V IN –0.5 to +7.5V Output voltage V OUT –0.5 to +7.5V Off state output voltage V OUT(off)–0.5 to +5.5V Storage temperature Tstg
–65 to +150
°C
Note:
1.The absolute maximum ratings are values which must not individually be exceeded, and furthermore, no two
of which may be realized at the same time.
Recommended Operating Conditions
Item
Symbol
Min
Typ
Max
Unit
Supply voltage V CC 4.5 5.0 5.5V Input voltage
V IN 0—V CC V Output voltage
V OUT 0—V CC V Operating temperature
Topr
–40
—
85°C Input rise/fall time *1t r , t f 0—
8
ns/V
Note: 1.This item guarantees maximum limit when one input switches.
Waveform: Refer to test circuit of switching characteristics.
Logic Diaglam
Electrical Characteristics (Ta = –40°C to +85°C)
Item
Symbol V CC (V)
Min Max Unit
Test Conditions
Input voltage V IH 2.0—V V IL —0.8V Output voltage
V OH 4.5 2.4—V I OH = –3 mA 4.5 2.0—V I OH = –15 mA V OL
4.5—0.4V I OL = 24 mA 4.5—0.5V I OL = 48 mA Input diode voltage V IK 4.5—–1.2V I IN = –18 mA Input current
I I
5.5— 1.0μA V IN = 5.5 V 5.5—–250μA V IN = 0 V 5.5
—100μA V IN = 7.0 V Short circuit output current *1
I OS 5.5–100–225mA V IN = 0 or 5.5 V Off state output current I OZH 5.5—50μA V O = 2.7 V I OZL 5.5—–50μA V O = 0.5 V
Supply current
I CCL 5.5—29.5mA V IN = 0 or 5.5 V All output is “L”I CCH 5.5— 2.5mA V IN = 0 or 5.5 V All output is “H”I CCZ
5.5—
2.5
mA
V IN = 0 or 5.5 V All output is “Z”
I CCT *2 5.5— 1.5mA V IN = 3.4 or 0.5 V
Notes :1.Not more than one output should be shorted at a time and duration of the short circuit should not exceed one
second.
2.When input by the TTL level, it shows I CC increase at per one input pin.
Switching Test Method (C L = 50 pF)
Ta = 25°C V CC = 5.0 V
Ta = –40 to 85°C V CC = 5.0 V ±10%Item
Symbol Min Max Min Max Unit Test Conditions Propagation CK →
Q t PLH 3.08.0 3.010.0ns See under figure delay time
t PHL 3.08.0 3.010.0Output enable time t ZH 3.09.0 3.011.0ns t ZL 3.09.0 3.011.0Output disable time t HZ 3.08.0 3.010.0ns t LZ 3.08.0 3.010.0Setup time t s (H) 2.0— 2.0—ns t s (L) 2.0— 2.0—Hold time t h (H) 2.0— 2.0—ns t h (L) 2.0— 2.0—Pulse width t w (H) 6.0
—
6.0—ns
t w (L) 6.0—
6.0—
Input capacitance C IN 3.0(Typ)—pF V IN = V CC or GND Output capacitance
C O
15.0(Typ)
—
pF
V O = V CC or GND
Test Circuit
Waveforms-2
Package Dimensions
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