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.