MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
8-Bit Serial-Input/Serial or Parallel-Output Shift Register with Latched 3-State ...
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
8-Bit Serial-Input/Serial or Parallel-Output Shift Register with Latched 3-State Outputs
High–Performance Silicon–Gate
CMOS
The MC54/74HC595A is identical in pinout to the LS595. The device inputs are compatible with standard
CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs.
The HC595A consists of an 8–bit shift register and an 8–bit D–type latch with three–state parallel outputs. The shift register accepts serial data and provides a serial output. The shift register also provides parallel data to the 8–bit latch. The shift register and latch have independent clock inputs. This device also has an asynchronous reset for the shift register.
The HC595A directly interfaces with the Motorola SPI serial data port on
CMOS MPUs and MCUs.
Output Drive Capability: 15 LSTTL Loads Outputs Directly Interface to
CMOS, NMOS, and TTL Operating
Voltage Range: 2.0 to 6.0 V Low Input Current: 1.0 µA High Noise Immunity Characteristic of
CMOS Devices In Compliance with the Requirements Defined by JEDEC Standard
No. 7A Chip Complexity: 328 FETs or 82 Equivalent Gates Improvements over HC595
— Improved Propagation Delays — 50% Lower Quiescent Power — Improved Input Noise and Latchup Immunity
SERIAL DATA INPUT
A 14
LOGIC DIAGRAM
SHIFT REGISTER
LATCH
SHIFT 11 CLOCK RESET 10
LATCH 12 CLOCK OUTPUT 13 ENABLE
VCC = PIN 16 GND = PIN 8
15 QA 1 QB 2 QC 3 QD 4 QE 5 QF 6 QG 7 QH
PARALLEL DATA
OUTPUTS
9 SQH
SERIAL DAT...