Datasheet

1
Data sheet acquired from Harris Semiconductor
SCHS158E
Features
Three-State Buffered Outputs
Gated Input and Output Enables
Fanout (Over Temperature Range)
- Standard Outputs. . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
Wide Operating Temperature Range . . . -55
o
C to 125
o
C
Balanced Propagation Delay and Transition Times
Significant Power Reduction Compared to LSTTL
Logic ICs
HC Types
- 2V to 6V Operation
- High Noise Immunity: N
IL
= 30%, N
IH
= 30% of V
CC
at V
CC
= 5V
HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
V
IL
= 0.8V (Max), V
IH
= 2V (Min)
- CMOS Input Compatibility, I
l
1µA at V
OL
, V
OH
Pinout
CD54HC173, CD54HCT173
(CERDIP)
CD74HC173
(PDIP, SOIC, SOP, TSSOP)
CD74HCT173
(PDIP, SOIC)
TOP VIEW
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-
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.
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.
The ’HCT173 logic family is functionally, as well as pin com-
patible with the standard LS logic family
.
OE
OE2
Q
0
Q
1
Q
2
Q
3
GND
V
CC
MR
D0
D1
D2
D3
E2
14
15
16
9
13
12
11
10
1
2
3
4
5
7
6
8
E1
CP
Ordering Information
PART NUMBER
TEMP. RANGE
(
o
C) PACKAGE
CD54HC173F3A -55 to 125 16 Ld CERDIP
CD54HCT173F3A -55 to 125 16 Ld CERDIP
CD74HC173E -55 to 125 16 Ld PDIP
CD74HC173M -55 to 125 16 Ld SOIC
CD74HC173MT -55 to 125 16 Ld SOIC
CD74HC173M96 -55 to 125 16 Ld SOIC
CD74HC173NSR -55 to 125 16 Ld SOP
CD74HC173PW -55 to 125 16 Ld TSSOP
CD74HC173PWR -55 to 125 16 Ld TSSOP
CD74HC173PWT -55 to 125 16 Ld TSSOP
CD74HCT173E -55 to 125 16 Ld PDIP
CD74HCT173M -55 to 125 16 Ld SOIC
CD74HCT173MT -55 to 125 16 Ld SOIC
CD74HCT173M96 -55 to 125 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.
February 1998 - Revised October 2003
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright
© 2003, Texas Instruments Incorporated
CD54HC173, CD74HC173,
CD54HCT173, CD74HCT173
High-Speed CMOS Logic
Quad D-Type Flip-Flop, Three-State
[
/Title
(
CD74H
C
173,
C
D74H
C
T173)
/
Subject
(
High
S
peed
C
MOS
L
ogic
Q
uad D-
T
ype

Summary of content (22 pages)