SN74VMEH22501AZQLR

Overview

The SN74VMEH22501AZQLR is an 8-bit universal bus transceiver and two 1-bit bus transceivers with split LVTTL ports, feedback paths, and 3-state outputs. It operates at a supply voltage of 3.15 V to 3.45 V and supports an operating temperature range of -40°C to 85°C. The device features B-port outputs with drive capabilities of -48 mA/64 mA and Y/A-port outputs of -12 mA/12 mA. It includes Ioff, power-up 3-state, and BIAS VCC support for live insertion.

Feature Summary

• UBT transceiver combines D-type latches and flip-flops for transparent, latched, or clocked modes
• Split LVTTL port provides a feedback path for control and diagnostics monitoring
• I/O interfaces are 5-V tolerant and compliant with VME64, 2eVME, and 2eSST protocols
• BIAS VCC circuitry supports true live-insertion capability

Applications

• High-speed interface between cards operating at LVTTL logic levels and VME64 backplane topologies
• VME64x backplane applications supporting 2eVME protocols
• Systems requiring 2eSST protocol compliance

Procurement Notes

Verify the specific ZQLR suffix indicates the MicroStar BGA package when sourcing. Confirm that the component meets the required RoHS standards and lead-free specifications for your assembly process. Ensure the ordering part number matches the exact package type needed for your PCB layout design.

Selection Notes

Select this component for designs requiring a combination of universal bus transceiver functions and integrated 1-bit transceivers. It is suitable for applications needing high-drive B-ports and 5-V tolerant inputs. Consider its compatibility with VME64x and 2eSST backplane architectures when choosing this device over standard bus transceivers.

Part Context

This device belongs to the Texas Instruments Widebus Family. It is pin-for-pin compatible with the SN74VMEH22501 but offers a wider operating temperature range. The SN74VMEH22501A series is designed to replace multiple logic functions including buffers, latches, and registered transceivers in a single package.

Replacement Considerations

The SN74VMEH22501 is a compatible predecessor. Designers should verify that the wider temperature range of the 'A' variant meets their environmental requirements.