74VMEH22501DGGRE4

Universal Bus Functions Overview

The SN74VMEH22501DGGRE4 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 operates within a supply voltage range of 3.15 V to 3.45 V and supports temperatures from 0°C to 85°C. The device features high-drive B-port outputs (-48 mA/64 mA) and lower drive A/Y-port outputs (-12 mA/12 mA). It includes OEC circuitry for signal integrity, Ioff for live insertion, and bus-hold on the 3A port.

Universal Bus Functions Feature Summary

• Combines D-type latches and flip-flops for transparent, latched, or clocked data transfer modes
• Provides split LVTTL ports with feedback paths for control and diagnostics monitoring
• Supports live insertion via Ioff, power-up 3-state, and BIAS VCC circuitry
• Features OEC circuitry to improve signal integrity and reduce electromagnetic interference

Universal Bus Functions Applications

• High-speed interface between cards operating at LVTTL logic levels and VME64 backplane topologies
• Implementation of VME64x (ANSI/VITA 1.1) and 2eSST protocols in VITA 1.5
• Replacement for standard transceivers, buffers, latches, and registered transceivers in complex logic designs

Universal Bus Functions Procurement Notes

Verify that the ordering suffix 'E4' corresponds to lead-free packaging and RoHS compliance as specified by Texas Instruments. Confirm the package type matches the required board layout, specifically the 48-pin TSSOP (DGG) configuration. Ensure the component meets the specific temperature range requirements for your application environment.

Universal Bus Functions Selection Notes

Select this component when a single device must replace multiple logic functions such as transceivers, buffers, and latches. It is suitable for applications requiring 5-V tolerance on inputs while operating at 3.3 V. Consider its high-drive capabilities for driving large capacitive loads typical in backplane environments.

Universal Bus Functions Part Context

This part belongs to the Texas Instruments Widebus family, specifically the 74VMEH series. It is designed to meet VME64, 2eVME, and 2eSST protocol standards. The device integrates universal bus transceiver functionality with additional diagnostic feedback paths, distinguishing it from standard bus transceivers.

Universal Bus Functions Replacement Considerations

The datasheet indicates the UBT transceiver can replace functions of '245, '623, '645, '241, '244, '541, '543, '373, '573, '646, '652, '374, and '574 families.