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Renesas Electronics Components Datasheet

HD74HC173 Datasheet

4-bit D-type Register

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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: tpd (Clock to Q) = 14 ns typ (CL = 50 pF)
High Output Current: Fanout of 10 LSTTL Loads
Wide Operating Voltage: VCC = 2 to 6 V
Low Input Current: 1 µA max
Low Quiescent Supply Current: ICC (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
HXXXXL
L L X X X Q0
L H X X Q0
L X H X Q0
L LLLL
L L LHH
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.
QAo to QHo = Outputs remain unchanged.
QAn to QGn = 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


Renesas Electronics Components Datasheet

HD74HC173 Datasheet

4-bit D-type Register

No Preview Available !

HD74HC173
Pin Arrangement
Output
Control
M1
N2
1Q 3
Output
2Q 4
3Q 5
4Q 6
Clock 7
GND 8
Logic Diagram
1D
2D
3D
4D
G1
G2
Clock
Clear
Control M
Control N
Output
Control Clear
1Q 1D
2Q 2D
3Q 3D
4Q 4D
CK Data
Enable
(Top view)
16 VCC
15 Clear
14 1D
13 2D
Data
12 3D Input
11 4D
10 G2 Data
Enable
9 G1 Input
D
C
CR
D
C
CR
D
C
CR
D
C
CR
Q
Q
Q
Q
Q
Q
Q
Q
VCC
1Q
VCC
2Q
VCC
3Q
VCC
4Q
Rev.3.00, Jan 31, 2006 page 2 of 7


Part Number HD74HC173
Description 4-bit D-type Register
Maker Renesas
Total Page 8 Pages
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