TC74VHC245FK(EL,K)

Overview

The TC74VHC245FK(EL,K) is an octal bus transceiver fabricated with silicon gate C2MOS technology. It operates within a supply voltage range of 2.0 V to 5.5 V and supports asynchronous two-way communication between data busses. The device features balanced propagation delays, high noise immunity, and low power dissipation. It includes static discharge protection on all inputs and provides three-state outputs for effective bus isolation when disabled.

Feature Summary

• High-speed operation comparable to Bipolar Schottky TTL
• Low power dissipation with minimal quiescent current
• Wide operating voltage range from 2 V to 5.5 V
• Pin and function compatible with 74ALS245

Applications

• Two-way asynchronous communication between data busses
• Level shifting in 3.3-V systems
• Interface applications requiring high noise immunity

Procurement Notes

Verify the specific package suffix (FK indicates VSSOP-20) against the required footprint. Confirm RoHS compliance status directly with the manufacturer or authorized distributors. Ensure design accounts for the parasitic diode between bus terminals and VCC, preventing direct 5 V to 3 V system interfacing without additional circuitry.

Selection Notes

Select this component for designs requiring bidirectional data transfer with high speed and low power consumption. It serves as a drop-in replacement for 74ALS245 equivalents. Consider the VSSOP-20 package size for space-constrained PCB layouts. Verify that input levels are fixed via pull-up or pull-down resistors if bus terminals float.

Part Context

This part belongs to Toshiba's TC74VHC series of advanced high-speed CMOS logic devices. The 'FK' suffix denotes the VSSOP-20 package variant, while '(EL,K)' typically refers to environmental and reel specifications. It is part of the broader family of octal bus transceivers designed for general-purpose digital logic applications.

Replacement Considerations

The datasheet explicitly states pin and function compatibility with the 74ALS245.