74HC164 74HCT164 74AHC164 and 74AHCT164 Serial Shift Registers

Diodes' 74HC164 remains one of the most popular parts from the 74HC logic family. The part is a serial input 8-bit edge-triggered shift register that has 8-push-pull outputs. The 74HC164 features standard CMOS logic inputs while the 74HCT164 is suited for applications requiring TTL logic thresholds. Both versions feature 4 mA drive capability. The 74AHC164 is a higher-performance version that features 8 mA drive capability and faster propagation times. The 74AHCT is the TTL-compatible version. SO-14 and TSSOP-14 packages are being made available at the initial release.

The shift register can be used to expand the output capabilities of a simple-microcontroller. The required state can be clocked into a shift register and asserted onto the outputs. The shift register can maintain the state indefinitely.       

Features

Wide Supply Voltage Range
• The 74HC164 operates from 2.0 V to 6.0 V
• The 74AHC164 operates from 2.0 V to 5.5 V
• The 74HCT164 and 74AHCT164 operate from 4.5 V to 5.5 V

Updated 5 V CMOS Process/Diodes Controlled Packaging
• The die are fabricated on an upgraded 5 V process that will guarantee a long-term supply. The TSSOP-14 and SO-14 are packaged and tested at Diodes’ majority owned facilities allowing for the best supply chain control and continued supply.

Direct Replacement
• The 74HC164, 74HCT164, 74AHC164, and 74AHCT164 are direct replacements for industry-standard parts