Description

The SNx4HC595 devices contain an 8-bit, serial-in, 1 shift register that feeds an 8-bit D-type storage register. The storage register has parallel 3-state outputs. Separate clocks are provided for both the shift and storage register. The shift register has a direct overriding clear (SRCLR) input, serial (SER) ICC input, and serial outputs for cascading. When the output-enable (OE) input is high, the outputs are in the high-impedance state.

Features

• 8-Bit Serial-In, Parallel-Out Shift parallel-out

• Wide Operating Voltage Range of 2 V to 6 V

• High-Current 3-State Outputs Can Drive Up to 15 LSTTL Loads

• Low Power Consumption: 80-μA (Maximum)

• tpd = 13 ns (Typical)

• ±6-mA Output Drive at 5 V

• Low Input Current: 1 μA (Maximum) Device Information(1)

• Shift Register Has Direct Clear

• On Products Compliant to MIL-PRF-38535, All Parameters Are Tested Unless Otherwise Noted. On All Other Products, Production Processing Does Not Necessarily Include Testing of All Parameters.

Pins

Arduino Example Code

//Define PinModes
pinMode (latchPin,OUTPUT);
pinMode (dataPin, OUTPUT);
pinMode (clkPin, OUTPUT);
pinMode (oePin, OUTPUT);

//disable output on SR
digitalWrite(oePin,HIGH);

//define data
byte data = 0;


//set or clear bits in our byte variable data
bitSet(data,bitToSet);
bitClear(data,bitToClear);


//write out to SR
digitalWrite(latchPin,LOW);
shiftOut(dataPIn,clockPin,LSBFIRST,data);
digitalWrite(latchPin,HIGH);


//Enable output on SR
digitalWrite(oePin,LOW);

Wiring

Add pull-ups to:

OE

SRCLK (Clock)

Add pull-downs to :

RCLK (Latch)

References