TC74VHCT244AFTEL

Overview

The TC74VHCT244AFTEL is an octal bus buffer featuring non-inverting, three-state outputs. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature from -40 °C to 85 °C. The device provides balanced propagation delays with a typical value of 6.1 ns at 5 V and 50 pF load. Quiescent supply current is limited to 4 μA maximum at 25 °C. It includes power-down protection on all inputs and outputs.

Feature Summary

• Features two active-low output enables for controlling the eight-channel data flow.
• Provides input compatibility with TTL logic levels while maintaining CMOS low power dissipation.
• Includes power-down protection on all pins to prevent device destruction during mismatched supply conditions.

Applications

• Used as 3-state memory address drivers
• Level conversion between 3.3 V and 5 V systems
• Octal bus buffering applications

Procurement Notes

Verify that the ordering suffix matches the required package type, as the base part number covers multiple physical formats. Confirm the specific suffix corresponds to the TSSOP-20 package rather than SOP or VSSOP variants. Ensure the component meets RoHS compliance requirements for your assembly process before finalizing procurement.

Selection Notes

Select this component when high-speed operation similar to Bipolar Schottky TTL is required alongside low power consumption. It serves as a direct pin-compatible replacement for standard 74 series buffers like 74AC, HC, F, ALS, and LS types. Use it for interfacing 3.3 V logic to 5 V systems where level shifting is necessary.

Part Context

This device belongs to the TC74VHCT240/244 family of advanced high-speed CMOS octal bus buffers. It shares identical pinouts and functions with the inverting TC74VHCT240 variant. The 'AF' designation indicates the specific package style, while 'TEL' denotes the tape-and-reel packaging format used for automated surface-mount assembly.

Replacement Considerations

Pin and function compatible with 74AC, 74HC, 74F, 74ALS, and 74LS 244 types.