74LVT162245MEA

Overview

The Fairchild Semiconductor 74LVT162245MEA is a low-voltage 16-bit bidirectional transceiver featuring 3-state outputs. It operates within a supply voltage range of 2.7 V to 3.6 V, with input and output interface capability for systems at 5 V. The device includes byte control inputs and direction control (T/R) to manage data flow. A Port outputs incorporate equivalent series resistance of 25 Ω, eliminating the need for external termination resistors while reducing signal overshoot and undershoot. B Port outputs provide higher drive capabilities, sourcing -32 mA and sinking 64 mA. The component utilizes BiCMOS logic technology.

Feature Summary

• Incorporates 25-ohm series resistors in A Port outputs to reduce signal reflections and remove the requirement for external termination components
• Supports live insertion and extraction through power-up/down high impedance states that ensure glitch-free bus loading
• Features bushold data inputs to maintain valid logic levels on unused pins without requiring external pullup resistors

Applications

• Bus-oriented applications requiring 16-bit bidirectional data transfer
• Systems necessitating interface between 3.3 V logic devices and 5 V peripheral systems
• High-speed memory interfaces where controlled slew rates and reduced ringing are critical

Procurement Notes

Verify the specific suffix against manufacturer documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with 3.3 V operating voltages and check for RoHS compliance status. Confirm that the 25-ohm series resistor feature aligns with your circuit design requirements for the A port. Validate thermal performance under maximum load conditions.

Selection Notes

Select this component when designing systems that require robust 3.3 V to 5 V level translation with integrated termination. The balanced drive strength of the B port supports heavier loads, while the A port's internal resistance simplifies layout. Consider the SSOP-48 package constraints for PCB space. Verify that the bi-directional control signals meet the timing requirements of the target bus architecture.

Part Context

This device belongs to the 74LVT family of low-voltage CMOS logic circuits. It functions as a dual 8-bit transceiver, allowing independent or combined operation of two bytes. The 74LVTH variant specifically adds the bushold feature compared to the standard 74LVT version. It is designed for high-performance digital systems requiring reliable data transmission across mixed-voltage domains.

Replacement Considerations

The 74LVT162245 is functionally compatible but lacks the bushold feature found in the LVTH variant. Other manufacturers produce equivalent 16-bit transceivers, but verify pinout compatibility and electrical characteristics such as output drive current and propagation delay before substitution.