IDT74LVC244APYG

Overview

The IDT74LVC244APYG is a 3.3V CMOS octal buffer and line driver featuring three-state outputs, manufactured by Renesas Electronics Corporation under the IDT brand. It utilizes 0.5-micron CMOS technology to provide high-speed data transmission with low power consumption. The device supports an extended voltage range of 2.7V to 3.6V and includes ±24mA output drivers for moderate to heavy loads. All inputs and outputs are 5V tolerant, facilitating operation in mixed-voltage environments.

Feature Summary

• Supports hot insertion and maintains high-impedance states during power-up or power-down sequences
• Features 5V tolerant I/O allowing direct interfacing between 3.3V and 5V logic devices
• Provides rail-to-rail output swing to enhance noise margins in mixed-voltage systems

Applications

• Data communication systems
• Telecommunication systems
• Mixed voltage system translation

Procurement Notes

Verify that the ordering suffix PYG corresponds specifically to the TSSOP-20 Green package variant as defined in the official IDT ordering guide. Confirm the industrial temperature range (-40°C to +85°C) matches your environmental requirements. Ensure compatibility with 3.3V supply rails within the specified 2.7V to 3.6V operating window before finalizing procurement.

Selection Notes

Select this component when designing circuits requiring octal buffering with 5V tolerance in a 3.3V environment. The ±24mA drive capability makes it suitable for driving moderate to heavy loads while maintaining signal integrity. Consider the TSSOP-20 package if space constraints require a thin-shrink outline form factor compared to standard SOIC options.

Part Context

This part belongs to the LVC244A family of 3.3V CMOS octal buffers/drivers. It is designed for asynchronous communication between data buses. The device is organized into two 4-bit line drivers with separate output-enable inputs, allowing flexible configuration for various bus width applications.

Replacement Considerations

Compatible pinout alternatives include the SN74LVC244 series from Texas Instruments and the 74FCT244 series from Renesas. Verify electrical characteristics such as propagation delay and output current capabilities against specific design requirements before substitution.

FAQ

How does the device handle high-impedance states during power transitions?

To ensure the high-impedance state during power up or power down, the OE input should be tied to VCC through a pullup resistor. The minimum value of this resistor is determined by the current-sinking capability of the driver.

What is the maximum voltage tolerance for the inputs and outputs?

All inputs, outputs, and I/O ports on the IDT74LVC244A are 5V tolerant, allowing them to interface directly with 5V devices even when the device operates at 3.3V.