Single-Ended Interface
One of the SCSI bus electrical signal configurations. On a single-ended configuration, each signal is carried by a signal wire. Single-ended buses are more susceptible to noise than differential buses. Traditionally, a single-ended interface was designed to use fewer (as compared to a differential configuration) pins, chips and PCB area. It cost less, was smaller, but it also is more sensitive to noise, more restrictive in physical devices spacing, and more restrictive in length (up to 6 meters). Single-ended interfaces are generally found inside subsystems that use SCSI to interconnect internal components (for example RAID arrays).
Part # Product Description



Active - can also be referred to as "regulated" or "Alt-II, a regulated voltage level to the terminating resistors is supplied by a voltage regulator circuit incorporated in the Terminator. Active is well known for being much more reliable than a Passive Terminator, and best used on FAST SCSI devices.
303-4512-0000 DB 25P (M) Single End (JS)
303-8901-0000 DB 50P (M) Active (JS)
303-6543-0000 DB 50P (M) Active + LED (JS)
303-9012-0000 CENT 50P (M) (L) to CENT 50P (F) (L) Active
303-1111-0000 CENT 50P (M) (L) Active
303-9876-000 CENT 50P (M) (L) Active w/LED
303-1297-0000 MicroD 68P (F) (JS) to MicroD 68P (M) (JS) Metal Assembly
303-0987-0000 MicroD 50P (M) (C) Active
303-2468-0000 MicroD 50P (M) (C) Active w/ LED
303-5454-0000 MicroD 68P (M) (JS) Active w/ LED
303-5656-0000 MicroD 68P (M) (JS) Active Molded
303-2446-0000 MicroD 68P (M) to MicroD 50P (F) Molded, Upper byte terminator-Active
303-2342-0000 MicroD 68P (M) to CENT 50P (F) Molded, Upper byte terminator-Active
303-2358-0000 MicroD 50P (M) to MicroD 68P (F) Molded w/ Hex Nuts, Upper byte terminator-Active



Passive - this is now known as the low performance SCSI Terminators, comes with 220/330 ohm terminating resistors. It is Commonly used on SCSI-1 and the slower SCSI-2

303-1234-0000 DB 25P (M/F) Passive (JS)
503-7890-0000 DB 50P (M) Passive (JS)
303-6789-0000 CENT 50P (M) (L) to CENT 50P (F) (L) Passive
303-3542-0000 CENT 50P (M) (L) Passive
303-1345-0000 MicroD 50P (M) (C) Passive
GW38325 SCSI Bus Test w/18 PCS LED


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