HD74HC173 Datasheet, PDF (1/8 Pages) Hitachi Semiconductor – 4-bit D-type Register (with 3-state Outputs)

HD74HC173
4-bit D-type Register (with 3-state outputs)
REJ03D0583-0300
Rev.3.00
Jan 31, 2006
Description
The four D type Flip-Flops operate synchronously from a common clock. The 3-state outputs allow the device to be
used in bus organized systems. The outputs are placed in the 3-stage mode when either of the output disable pins are in
the logic high level.
The input disable allows the flip-flops to remain in their present states without having to disrupt the clock. If either of
the 2 input disables are taken to a logic high level, the Q outputs are fed back to the inputs, forcing the flip-flops to
remain in the same state. Clearing is enabled by taking the clear input to a logic high level. The data outputs change
state on the positive going edge of the clock.
Features
• High Speed Operation: t_pd (Clock to Q) = 14 ns typ (C_L = 50 pF)
• High Output Current: Fanout of 10 LSTTL Loads
• Wide Operating Voltage: V_CC = 2 to 6 V
• Low Input Current: 1 µA max
• Low Quiescent Supply Current: I_CC (static) = 4 µA max (Ta = 25°C)
• Ordering Information
Part Name
Package Type
Package Code
(Previous Code)
Package
Abbreviation
HD74HC173P
DILP-16 pin
PRDP0016AE-B
(DP-16FV)
P
HD74HC173FPEL SOP-16 pin (JEITA)
PRSP0016DH-B
(FP-16DAV)
FP
HD74HC173RPEL SOP-16 pin (JEDEC)
PRSP0016DG-A _RP
(FP-16DNV)
Note: Please consult the sales office for the above package availability.
Taping Abbreviation
(Quantity)
—
EL (2,000 pcs/reel)
EL (2,500 pcs/reel)
Function Table
Inputs
Data Enable
Clear
Clock
G₁
G₂
Data D
Output Q
H
X
X
X
X
L
L
L
X
X
X
Q₀
L
H
X
X
Q₀
L
X
H
X
Q₀
L
L
L
L
L
L
L
L
H
H
Note: When either M or N (or both) is (are) high the output is disabled to the high-impedance state; however sequential
operation of the flip-flops is not affected.
Q_Ao to Q_Ho = Outputs remain unchanged.
Q_An to Q_Gn = Data shifted from the previous stage on a positive edge at the clock input.
H : High level
L : Low level
X : Irrelevant
Rev.3.00, Jan 31, 2006 page 1 of 7