Aeroflex / Tektronix / CDS 53A-332 Reed Relay Scanner Card

The Aeroflex / Tektronix / CDS 53A-332 Reed Relay Scanner Card routes signals from multiple sources to measurement instruments within the CDS 53/63 Series architecture. Built around a matrix of high-quality reed relays, the card delivers twenty 2-wire channels with low initial contact resistance and extended operational life. This design ensures signal integrity and measurement repeatability in demanding switching applications while minimizing distortion across signal paths.

Technical Specifications

• Twenty 2-wire channels


• Reed relay matrix construction


• 48-pin connector interface Electrical Requirements


• Power supply: 5 V DC from 53/63 Series Card Cage


• Operating voltage range: 4.75 V to 5.25 V DC


• Maximum quiescent current (all relays open): 0.30 A


• Peak current (all relays closed): 0.75 A Contact & Switching Specifications


• Maximum resistive load: 10 W


• Maximum DC switching voltage: 200 V


• Maximum switching current: 0.5 A


• Initial contact resistance: < 100 mΩ


• Contact resistance at end of reed life: 500 mΩ


• Signal path resistance at end of reed life: < 1.4 Ω


• Differential thermal offset: < 15 µV


• Single-line thermal offset: 10 GΩ

Key Features

• Low contact resistance ensures minimal signal loss and high measurement fidelity


• Extended reed life rated at 10 million operations per channel


• High-speed switching capability up to 150 channels per second


• Excellent thermal stability with sub-50 microvolt offset performance


• Continuous duty cycle operation for uninterrupted test sequences

Typical Applications Automated test systems requiring matrix signal routing, high-speed channel selection, and low-noise measurement paths in RF and analog signal environments.

Compatibility & Integration Installs directly into any function card slot of a 53 or 63 Series Card Cage. ASCII character programming from system controller. Operates from internal cage power supply and thermal management system.