The Keysight 34952A is a plug-in digital I/O, analog output, and totalizer module for the 34980A Multifunction Switch/Measure Unit mainframe. It delivers four 8-bit digital ports configurable for 8-, 16-, or 32-bit operation, two ±12 V analog output channels, and a 32-bit totalizer capable of counting pulses to 100 kHz. TTL-compatible I/O with open-drain outputs sinking 400 mA per channel and internal 5 V pull-up resistors on inputs enable direct integration with automated test, measurement, and control systems. High-density 50-pin D-sub connectors provide straightforward connection to external cabling and interconnect solutions.
Technical Specifications
Digital Input/Output
• Four 8-bit ports, configurable for 8-bit, 16-bit, or 32-bit operation
• TTL-compatible inputs and outputs
• Open-drain outputs: 400 mA sink capacity per channel
• Input pull-up resistors: 5 V internal pull-ups
• Front panel access: Single 8-bit input port readable at a time
Analog Output (D/A)
• Two channels
• Voltage range: ±12 V
• Resolution: 16 bits
• Maximum output current: 10 mA per channel
• Direct voltage programming
Totalizer
• 32-bit counter
• Maximum counting rate: 100 kHz
• Configurable edge detection: rising or falling edge
• Dual-gate control: Gate terminal (TTL high enables, low disables) and Not-Gate terminal (TTL low enables, high disables)
Connectors & Interface
• Standard 50-pin D-sub connectors
• TTL-compatible digital interface
• Earth-referenced module
– Key Features
• Modular plug-in design for 34980A mainframe integration
• Configurable digital port widths from 8 to 32 bits
• Precision analog output for bias sourcing and control setpoints
• High-speed pulse counting with selectable gate logic
• Industrial TTL I/O compatible with 5 V pull-up architecture
– Typical Applications
• Automated test equipment (ATE) control and data acquisition
• Bias voltage sourcing to devices under test
• Analog programmable power supply control
• Pulse counting and frequency measurement
• System-level integration requiring mixed-signal I/O
– Compatibility & Integration
The 34952A is a dedicated module for the Keysight 34980A Multifunction Switch/Measure Unit mainframe, which supports up to eight plug-in modules. This architecture enables flexible test system configuration by combining multiple functional modules within a single mainframe chassis.
