Keysight / Agilent / HP E1458A 96-Channel Digital Input/Output Module

The Keysight E1458A is a C-size VXI module providing 96 digital channels through twelve 8-bit bi-directional data ports arranged in three banks. Each port is individually configurable for positive or negative true logic and read/write or tri-state operation, supporting flexible data transmission from single or multiple ports up to 32-bit long words. The module delivers 325 kb/s block transfer rates and integrates six GPIO handshake protocols - none, leading edge, trailing edge, pulse, partial, and strobe - with dedicated FLAG, CTL, and I/O status lines per port. Three additional control lines (PIR, /RES, STS) enable custom handshaking and interrupt functions via register-based programming. TTL-compatible at 5V maximum, the E1458A suits digital subassembly testing, data acquisition, and control applications requiring high-density I/O in VXIbus systems. ## Technical Specifications • Module Type: VXI, C-size, 1-slot, register-based • Digital Channels: 96 total across twelve 8-bit bi-directional ports • Port Organization: Three banks of four ports; ports combinable for 8-bit, 16-bit, or 32-bit transfers • Block Transfer Rate: 325 kb/s (32-bit transfers) • Logic Levels: TTL compatible, 5V maximum • Output (High): −5.2 mA @ 2.5V (pull-up enabled) • Output (Low): 48 mA @ 0.5V ## Key Features • Individual port configuration for logic polarity and directional control • Six handshake protocol options for flexible synchronization • Per-port status monitoring (FLAG, CTL, I/O lines) • Peripheral interrupt, reset, and status control lines • Single or multi-port simultaneous data transmission ## Typical Applications • Digital subassembly functional testing • High-density digital I/O control • Data acquisition and system synchronization ## Compatibility & Integration • SCPI command set compatible with E1330B; supports additional readback and monitoring queries • VXIplug&play driver support on C-SCPI/I-SCPI platforms • Available as downloadable driver for Keysight E1406A command modules