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The HP/Agilent 44474A is a 16-bit digital input/output module built for the HP/Agilent 3488A and 3499A/B/C switch/control mainframes. It provides 16 bidirectional, TTL-compatible I/O lines plus 4 dedicated handshake lines for sensing and controlling external devices in automated test setups.
Key specs:
16 I/O lines — addressable individually, as two 8-bit ports, or as one 16-bit word
TTL-compatible input; open-collector output
Max voltage (line-to-chassis): 30V DC
Sink current: up to 0.125A per line
Tested and confirmed working. Shown as it will ship — see photos for the exact unit and any cosmetic wear.
