Agilent/Keysight N2263A

The Agilent/Keysight N2263A is a 32-bit digital input/output module for modular test systems requiring precise digital control and data acquisition. It has 32 bidirectional I/O lines plus 3 handshake/control lines, with flexible addressing as individual lines, two 16-bit ports, or four 8-bit ports. The module supports three I/O control modes - static, strobe, and handshake - plus five configurable handshake modes for peripheral communication.

Byte-by-byte input/output configuration and selectable positive or negative logic polarity enable adaptation to diverse test requirements. Each I/O line sinks up to 0.6 A, making the N2263A suitable for controlling high-current devices including relays, microwave components, and solenoid coils. TTL-compatible I/O operates to +42 VDC line-to-chassis with integrated zener protection and ESD filtering.

Handshake lines operate to +5 VDC. The module plugs into Keysight 3499A/B/C Switch/Control Systems and similar architectures.

Technical Specifications

• 32 bidirectional I/O lines with 3 handshake/control lines


• Individually addressable or configurable as two 16-bit ports or four 8-bit ports


• Three I/O control modes: static, strobe, handshake


• Five handshake modes using PCTL, I/O, and PFLG control lines


• Logic polarity selectable: positive or negative


• TTL-compatible I/O (standard input/output or input with open collector output)


• I/O lines: +42 VDC maximum line-to-chassis; input high ≥2.0 V, input low ≤0.8 V; output high ≥2.4 V @ ≤10 mA, output low ≤0.8 V @ ≤600 mA; sink current to 0.6 A per bit


• Handshake lines: +5 VDC maximum line-to-chassis; input high ≥2.0 V, input low ≤0.8 V; output high ≥2.4 V @ ≤400 µA, output low ≤0.5 V @ ≤1 mA; short-circuit current 42 VDC), ESD protection, resetable fuse

Key Features

• Sinks up to 0.6 A per line for direct control of external devices


• Byte-by-byte I/O configuration for mixed input/output requirements


• Selectable logic polarity and five handshake protocol options


• Integrated overvoltage and ESD protection

Typical Applications

• High-voltage/high-current relay control


• Microwave relay and attenuator switching (8710xx, 876xx, 849xx series)


• Solenoid coil actuation


• Digital signal routing in automated test systems

Compatibility & Integration Designed for plug-in integration into Keysight 3499A/B/C Switch/Control Systems. Supplied with screw terminal block and DIN96-to-Twin-D50 cable accessories. Product is obsolete; Keysight recommends the 34980A Multifunction Switch/Measure Unit as a current alternative.