1 Features
1• 8-Bit Serial-In, Parallel-Out Shift Registers
• Available in Ultra Small Logic QFN package(0.5
mm max height)
• Over-Voltage Tolerant on Inputs Independent of
Vcc
• 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) ICC
• tpd = 13 ns (Typical)
• ±6-mA Output Drive at 5 V
• Low Input Current: 1 μA (Maximum)
• Shift Register Has Direct Clear
• -55oC to 125oC Operating Temperature

2 Applications
• Network Switches
• Factory Automation
• Mobile Wearables
• Industrial Building Automation
• Power Infrastructure
• LED Displays
• Servers

3 Description
The SN74HC595B devices contain an 8-bit, serial-in,
parallel-out 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 register and storage register. The shift
register has a direct overriding clear (SRCLR) input,
serial (SER) input, and serial outputs for cascading.
When the output-enable (OE) input is high, the all
outputs are in the high-impedance state except QH'.