CD54HC173, CD74HC173,
CD54HCT173, CD74HCT173
Data sheet acquired from Harris Semiconductor
SCHS158E
High-Speed CMOS Logic
Quad D-Type Flip-Flop, Three-State
February 1998 - Revised October 2003
Features
Description
The ’HC173 and ’HCT173 high speed three-state quad D-
type flip-flops are fabricated with silicon gate CMOS technol-
ogy. They possess the low power consumption of standard
CMOS Integrated circuits, and can operate at speeds com-
• Three-State Buffered Outputs
• Gated Input and Output Enables
• Fanout (Over Temperature Range)
[ /Title
(CD74H
C173,
CD74H
CT173)
/Subject
(High
Speed
CMOS
Logic
- Standard Outputs. . . . . . . . . . . . . . . 10 LSTTL Loads parable to the equivalent low power Schottky devices. The
buffered outputs can drive 15 LSTTL loads. The large output
drive capability and three-state feature make these parts ide-
ally suited for interfacing with bus lines in bus oriented sys-
tems.
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
o
o
• Wide Operating Temperature Range . . . -55 C to 125 C
• Balanced Propagation Delay and Transition Times
• Significant Power Reduction Compared to LSTTL
Logic ICs
The four D-type flip-flops operate synchronously from a com-
mon clock. The outputs are in the three-state mode when
either of the two output disable pins are at the logic “1” level.
The input ENABLES allow the flip-flops to remain in their
present states without having to disrupt the clock If either of
the 2 input ENABLES are taken to a logic “1” level, the Q
outputs are fed back to the inputs, forcing the flip-flops to
remain in the same state. Reset is enabled by taking the
MASTER RESET (MR) input to a logic “1” level. The data
outputs change state on the positive going edge of the clock.
• HC Types
- 2V to 6V Operation
- High Noise Immunity: N = 30%, N = 30% of V
CC
IL
IH
at V
= 5V
CC
Quad D-
Type
• HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
V = 0.8V (Max), V = 2V (Min)
IL IH
- CMOS Input Compatibility, I ≤ 1µA at V , V
l
OL OH
The ’HCT173 logic family is functionally, as well as pin com-
patible with the standard LS logic family.
Ordering Information
Pinout
CD54HC173, CD54HCT173
(CERDIP)
CD74HC173
(PDIP, SOIC, SOP, TSSOP)
CD74HCT173
TEMP. RANGE
o
PART NUMBER
CD54HC173F3A
CD54HCT173F3A
CD74HC173E
( C)
PACKAGE
16 Ld CERDIP
16 Ld CERDIP
16 Ld PDIP
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
(PDIP, SOIC)
TOP VIEW
OE
1
2
3
4
5
6
7
8
16 V
CC
CD74HC173M
16 Ld SOIC
16 Ld SOIC
16 Ld SOIC
16 Ld SOP
15 MR
14 D0
13 D1
12 D2
11 D3
10 E2
OE2
CD74HC173MT
CD74HC173M96
CD74HC173NSR
CD74HC173PW
CD74HC173PWR
CD74HC173PWT
CD74HCT173E
CD74HCT173M
CD74HCT173MT
CD74HCT173M96
Q
Q
Q
Q
0
1
2
3
16 Ld TSSOP
16 Ld TSSOP
16 Ld TSSOP
16 Ld PDIP
CP
9
E1
GND
16 Ld SOIC
16 Ld SOIC
16 Ld SOIC
NOTE: When ordering, use the entire part number. The suffixes 96
and R denote tape and reel. The suffix T denotes a small-quantity
reel of 250.
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright © 2003, Texas Instruments Incorporated
1