CD74HC597,
CD74HCT597
Data sheet acquired from Harris Semiconductor
SCHS191
High Speed CMOS Logic
8-Bit Shift Register with Input Storage
January 1998
Features
Description
• Buffered Inputs
The Harris CD74HC597 and CD74HCT597 are high-speed
silicon gate CMOS devices that are pin-compatible with the
LSTTL 597 devices. Each device consists of an 8-flip-flop
input register and an 8-bit parallel-in/serial-in, serial-out shift
register. Each register is controlled by its own clock. A “low” on
the parallel load input (PL) shifts parallel stored data asyn-
chronously into the shift register. A “low” master input (MR)
• Asynchronous Parallel Load
[ /Title
(CD74
HC597
,
o
• Typical f
MAX
= 60MHz at V = 5V, C = 15pF, T = 25 C
CC L A
• Fanout (Over Temperature Range)
- Standard Outputs. . . . . . . . . . . . . . . 10 LSTTL Loads
CD74
HCT59
7)
/Sub-
ject
(High
Speed
CMOS
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads clears the shift register. Serial input data can also be synchro-
nously shifted through the shift register when PL is high.
o
o
• Wide Operating Temperature Range . . . -55 C to 125 C
• Balanced Propagation Delay and Transition Times
Ordering Information
• Significant Power Reduction Compared to LSTTL
Logic ICs
PKG.
NO.
o
PART NUMBER TEMP. RANGE ( C) PACKAGE
• HC Types
CD74HC597E
CD74HCT597E
CD74HC597M
CD74HCT597M
NOTES:
-55 to 125
-55 to 125
-55 to 125
-55 to 125
16 Ld PDIP
16 Ld PDIP
E16.3
E16.3
- 2V to 6V Operation
- High Noise Immunity: N = 30%, N = 30% of V
IL IH CC
at V
= 5V
CC
16 Ld SOIC M16.15
16 Ld SOIC M16.15
• HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
1. When ordering, use the entire part number. Add the suffix 96 to
obtain the variant in the tape and reel.
V = 0.8V (Max), V = 2V (Min)
IL IH
- CMOS Input Compatibility, I ≤ 1µA at V , V
OL OH
l
2. Wafer and die is available which meets all electrical
specifications. Please contact your local sales office or Harris
customer service for ordering information.
Pinout
CD74HC597, CD74HCT597
(PDIP, SOIC)
TOP VIEW
D1
D2
1
2
3
4
5
6
7
8
16 V
CC
15 D0
14 D
D3
S
D4
13 PL
12 ST
D5
CP
D6
11 SH
CP
10 MR
Q7
D7
9
GND
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
File Number 1915.1
Copyright © Harris Corporation 1998
1