Keysight / Agilent / HP E1533A 16-Bit Digital I/O SCP

The Keysight E1533A is a 16-bit Digital I/O Signal Conditioning Plug-on (SCP) module for VXI mainframe systems. It has TTL-compatible digital input and output lines organized into two independent 8-bit channels, each independently configurable as input or output ports. The module integrates directly into compatible VXI cards to deliver reliable digital interfacing for automated test and data acquisition applications.

Technical Specifications Digital I/O Architecture:

16 TTL-compatible input/output lines

Two independent 8-bit channels

Each channel independently configurable as input or output port

Passive (resistor) pull-up option for output ports

Active (transistor) pull-up option for output ports

Key Features Flexible channel configuration allows each 8-bit port to operate independently as either source or load. Dual pull-up options - passive resistor and active transistor - provide design flexibility for different impedance and drive requirements. The SCP form factor enables modular integration into existing VXI infrastructure without requiring significant system redesign.

Typical Applications The E1533A serves digital control, sensing, and switching applications within automated test environments. It is suitable for synchronizing external instruments, commanding relay matrices, reading discrete sensor states, and interfacing with TTL-level logic circuits in data acquisition systems.

Compatibility & Integration The E1533A works with use with specific Keysight/Agilent VXI cards: E1313A, E1413A/B, E1415A, E1419A, and E1422A. The E1313A can accommodate up to four SCP modules; other compatible cards support up to eight modules. Signal Conditioning Plug-ons such as the E1533A were originally offered as options for E1313A and E1413A/B VXI cards and integrate with Scanning A/D systems to provide comprehensive signal conditioning across multiple input channels.