Astronics / EADS / Talon Instruments SR103 TTL I / O Module

The SR103 is a TTL I/O module designed for integration into the Astronics/EADS/Talon Instruments SR192 Digital Test Module, a VXI-based platform for stimulus and response applications in industrial and enterprise-level testing environments. The module functions as a plug-in component within larger scalable digital test systems, enabling multi-channel I/O stimulus and capture operations with synchronized timing across multiple chassis units.

## Technical Specifications

• **Module Type:** TTL I/O Module for SR192 VXI Digital Test Module
• **Logic Standard:** TTL (Transistor-Transistor Logic)
• **Timing Rate:** Up to 50 MHz
• **Data Rate:** Up to 25 MHz (50 MHz multiplexed)
• **Output Drive:** 50 mA source/sink
• **Memory Architecture:** 5-memory architecture (Stimulus, Tristate, Record, Expect, Mask); memory depth per channel typically 128K bits, expandable to 256K bits when multiplexed
• **Signal Type:** Single-ended or double-ended (differential) logic configuration
• **TTL Logic Levels:** Low state -0.2 V dc to +0.8 V dc; High state 2.0 V dc to 5.25 V dc
• **Power Distribution:** Module receives power through VXI chassis backplane

## Key Features

• Plug-in module architecture for two-slot, “C” size VXI chassis mounting
• TTL logic level compatibility with standard digital devices
• Configurable signal types: single-ended or differential I/O channels
• Dual memory depth options for flexible stimulus and capture scenarios
• Multiple timing/data rate configurations for diverse test protocols

## Typical Applications

• Digital stimulus and response testing in automated test equipment (ATE) environments
• Multi-channel TTL signal generation and acquisition
• Industrial and enterprise digital device validation
• Scalable test system expansion within VXI chassis infrastructure

## Compatibility & Integration

The SR103 integrates directly into the SR192 platform, which supports system expansion to 1152 I/O channels within a single 13-slot chassis through synchronized multi-unit configurations. The module operates within the established SR192 I/O module family, which accommodates various logic options including fixed-voltage TTL, ECL, RS485/422, and variable voltage levels.