Interface Technology SR5020A TTL I/O Module

The SR5020A is a TTL I/O module for VXI-based digital test systems, delivering 32 input and 32 output channels per card at full 50 MHz data rates. Built around a dual-processor architecture with seven 64K-vector memory banks, it generates and verifies complex stimulus patterns with 100 ps edge placement resolution. Up to 20 modules operate under a single SR5010 Timing/Control Module, scaling systems to 640 I/O pins. The module supports multiple output formats

NRZ, RZ, RONE, RTC, and tristate - and incorporates per-channel 16-bit CCITT CRC signature analysis. Each group of eight output pins shares independent timing generator pairs, while response timing accommodates window compare with glitch detection.

Technical Specifications

I/O Configuration: 32 input pins, 32 output pins per module

Maximum System Capacity: 640 I/O pins (20 SR5020A modules + 1 SR5010 controller)

Data Rate: 50 MHz

Pattern Memory: Seven banks at 64K vectors deep

Memory Types: Output, Algorithmic, Tristate, Expect, Mask, and Record patterns

Edge Resolution: 100 ps

Stimulus Timing Generators: 16 per module; grouped in sets of 2 pairs per 8 output pins

Response Timing Generators: 2 per module (combinable for window compare)

Signature Analysis: 16-bit CCITT CRC per input channel

Output Formats: NRZ, RZ, RONE, RTC, RI (tristate)

Power Consumption: 77.2 W at 50 MHz

Key Features

Pattern generation with algorithmic and RAM-backed modes

Flexible stimulus and response timing with independent generator sets

High-resolution edge placement for precise UUT synchronization

Integrated signature analysis for response validation

Modular expansion - stack up to 20 cards in one system

Glitch detection within response timing window

Electrical Requirements

+5.0 V @ 10.0 A (50 W at 50 MHz)

-5.2 V @ 4.0 A (20.8 W)

+12.0 V @ 0.1 A (1.2 W)

-12.0 V @ 0.1 A (1.2 W)

-2.0 V @ 2.0 A (4.0 W)

Compatibility & Integration Requires VXI mainframe and SR5010 Timing/Control Module supervision. Operates within standard VXI bus architecture for industrial and automotive digital functional test environments.