74HC595 8-bit serial-in, serial or parallel-out shift register with output latches; 3-state

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Description

The 74HC595 are high-speed Si-gate CMOS devices and are pin-compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC.

The 74HC595 is an 8-stage serial shift register with a storage register and 3-state outputs. The shift register and storage register have separate clocks. Data is shifted on the positive-going transitions of the SH_CP input. The data in each register is transferred to the storage register on a positive-going transition of the ST_CP input. If both clocks are connected together, the shift register will always be one clock pulse ahead of the storage register.

The shift register has a serial input (DS) and a serial standard output (Q7’) for cascading. It is also provided with asynchronous reset (active LOW) for all 8 shift register stages. The storage register has 8 parallel 3-state bus driver outputs. Data in the storage register appears at the output whenever the output enable input (OE) is LOW.

 

 Pin Configuration

Pin Number

Pin Name

Description

1,2,3,4,5,6,7

Output Pins (Q1 to Q7)

parallel data output

8

Ground

Connected to the Ground of the circuit

9

Q7

serial data output

10

(MR) Master Reset

master reset (active LOW)

11

(SH_CP) Clock

This is the clock pin to which the clock signal has to be provided from MCU/MPU

12

(ST_CP) Latch

The Latch pin is used to update the data to the output pins. It is active high

13

(OE) Output Enable

The Output Enable is used to turn off the outputs. Must be held low for normal operation

14

(DS) Serial Data

This is the pin to which data is sent, based on which the 8 outputs are controlled

15

(Q0) Output

The first output pin.

16

Vcc

This pin powers the IC, typically +5V is used.

 

FEATURES

  •  8-bit serial input
  • 8-bit serial or parallel output
  • Storage register with 3-state outputs
  • Shift register with direct clear
  • 100 MHz (typical) shift out frequency
  • ESD protection:  -HBM EIA/JESD22-A114-A exceeds 2 000 V                                                           -MM EIA/JESD22-A115-A exceeds 200 V. 

APPLICATIONS

  • Serial-to-parallel data conversion
  • Remote control holding register.


Specifications

Supply voltage

2 - 6V

TEMPERATURE RANGE

−40°C to +125°C

Pins

16

Package

SO16

Ambient temperature

−40°C ~ +125°C

Dimensions

10mm x 6mm x 1.6mm


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