HP C1753-265 ScanJet Interface ISA Card 25-Pin Connector

HP C1753-265 ScanJet Interface ISA Card 25-Pin Connector

This is an ISA bus expansion card designed to interface HP ScanJet flatbed scanners to personal computers from the 1980s and early 1990s. The C1753-265 provides the necessary signal conversion and control logic between the scanner's parallel interface and the computer's ISA expansion slot, allowing the scanner to be recognized and operated by the host system. This card was standard equipment for connecting external ScanJet models to IBM-compatible PCs and early Compaq systems that relied on ISA-bus expansion for peripheral connectivity.

Specifications & What's Included

• Manufacturer: Hewlett-Packard (HP)
• Model Number: C1753-265
• Card Type: ISA (Industry Standard Architecture) Full-Length Expansion Card
• Interface Connector: 25-Pin D-Subminiature (DB-25)
• Bus Standard: ISA 8-bit / 16-bit compatible
• Form Factor: Full-length ISA card with standard gold-plated edge connector
• Compatible Scanners: HP ScanJet series (original/classic models)
• Compatible Systems: IBM PC, XT, AT, and ISA-compatible computers
• Condition: Pulled from working inventory; all connectors and contacts intact

Applications

This interface card was essential for document scanning on legacy personal computers during the 1980s and early 1990s, before USB and parallel-port scanners became standard. It bridges the gap between the scanner's proprietary parallel protocol and the computer's ISA bus, making it indispensable for any ScanJet restoration or vintage computer setup. Enthusiasts collecting or refurbishing period-correct IBM-compatible systems or those seeking to restore original ScanJet hardware will find this card critical for full functionality. The ISA form factor and connector design date this card to the ISA era — roughly 1985–1995 — when expansion cards were the primary method of adding peripheral support to desktop computers.