TC74VHC165FTELM

Overview

The TC74VHC165FTELM is an advanced high-speed CMOS 8-bit parallel-in, serial-out shift register fabricated with silicon gate C2MOS technology. It operates within a supply voltage range of 2.0 V to 5.5 V and supports a maximum clock frequency of 150 MHz at 5 V. The device features push-pull outputs, balanced propagation delays, and input protection circuits allowing 0 to 5.5 V tolerance regardless of the supply voltage. It functions in temperatures from -40°C to 85°C.

Feature Summary

• Parallel or serial data loading capability controlled by the SHIFT/LOAD pin
• Gated clock input with dedicated clock inhibit functionality
• Power-down protection on all inputs for system interface safety
• High noise immunity with symmetric propagation delays

Applications

• Serial-to-parallel data conversion in digital systems
• Interfacing between 5 V and 3 V logic families
• Battery backup systems requiring dual-supply compatibility
• General electronics applications including computers and office equipment

Procurement Notes

Verify the specific package suffix against official Toshiba documentation to confirm physical dimensions and pinout compatibility. Ensure that the ordering code matches the required tape-and-reel specifications if automated assembly is intended. Confirm RoHS compliance status through current manufacturer declarations prior to final procurement decisions.

Selection Notes

Select this component when an 8-bit shift register with parallel load capability is required in a compact surface-mount package. The wide operating voltage range makes it suitable for mixed-voltage environments. Verify that the 150 MHz maximum frequency meets the system timing requirements and that the 16-pin TSSOP footprint fits the PCB layout constraints.

Part Context

This part belongs to the TC74VHC series of advanced high-speed CMOS logic devices manufactured by Toshiba Semiconductor and Storage. It serves as a functional equivalent to the industry-standard 74ALS165 while offering lower power dissipation and higher speed performance typical of the VHC logic family.

Replacement Considerations

The datasheet explicitly states that the device is pin and function compatible with the 74ALS165. Designers replacing legacy components should verify that the new CMOS input characteristics do not violate existing circuit drive capabilities.