SN74VMEH22501DGVR

Overview

The SN74VMEH22501DGVR is an 8-bit universal bus transceiver with two integral 1-bit three-wire bus transceivers, designed for 3.3-V VCC operation with 5-V tolerant inputs. It supports transparent, latched, and flip-flop modes of data transfer. The device features split LVTTL ports providing feedback paths for control and diagnostics monitoring. B-port outputs provide high drive capabilities of -48 mA/64 mA, while Y and A-port outputs offer -12 mA/12 mA drive. It includes Ioff, power-up 3-state, and BIAS VCC support for live insertion applications.

Feature Summary

• UBT transceiver combines D-type latches and D-type flip-flops for transparent, latched, or clocked data transfer modes
• Split LVTTL port architecture provides separate feedback paths for control and diagnostics monitoring
• OEC circuitry improves signal integrity and reduces electromagnetic interference (EMI)
• Supports live insertion via Ioff, power-up 3-state, and BIAS VCC circuitry

Applications

• High-speed interface between cards operating at LVTTL logic levels and VME64 backplane topologies
• Interface for VME64x backplane topologies supporting 2eVME protocols
• Interface for VME320 backplane topologies supporting 2eSST protocols

Procurement Notes

Verify the specific ordering suffix 'DGVR' corresponds to the TVSOP-48 package and tape-and-reel delivery format as listed in the manufacturer's ordering information. Confirm that the component meets the required RoHS compliance standards and operates within the specified temperature range of 0°C to 85°C. Ensure all unused control inputs are properly terminated to VCC or GND to maintain device functionality.

Selection Notes

Select this component when a single device must replace multiple standard logic functions such as transceivers, buffers, latches, and flip-flops. It is suitable for designs requiring high-drive outputs for large capacitive loads on backplanes. Consider its compatibility with VME64, VME64x, and VME320 protocols if system integration requires adherence to these specific bus standards.

Part Context

This device belongs to the Texas Instruments Widebus family of universal bus transceivers. It is specifically engineered to facilitate high-speed data transmission across complex backplane architectures. The inclusion of both latch and flip-flop functionalities within a single package allows for flexible data path configurations without requiring additional discrete logic components.

Replacement Considerations

The SN74VMEH22501 can functionally replace devices such as '245, '623, '645, '241, '244, '541, '543, '373, '573, '646, '652, '374, and '574.