10-bit bus transceiver for 5V backplanes and memory interfaces
The TI SN74ABT861DW is a 10-bit non-inverting transceiver from the 74ABT family, with 3-state outputs on both the A and B ports. It operates from a 4.5V to 5.5V supply — a straight 5V logic part, not a mixed-voltage device. The 32mA source and 64mA sink drive per channel handles heavily loaded buses typical of memory arrays, backplane segments, or parallel I/O banks where fan-out matters. The single-element, 10-bit organization means one package replaces ten discrete bus-keep or line-driver channels.
Industrial temperature range and package fit
Rated for -40°C to 85°C ambient, this transceiver suits factory automation, outdoor telecom cabinets, and engine-bay-adjacent electronics where commercial-grade 0°C to 70°C parts would drift out of spec. The 24-SOIC wide-body package (7.50mm body width) is a standard footprint for 10-bit bus transceivers; the 0.295-inch pitch matches common SOIC-24 land patterns. The mounting is surface-mount only — no through-hole variant in this order code.
Output drive and 3-state bus control
The 3-state outputs let multiple transceivers share a common bus without contention — the output enable control puts the drivers into high-impedance when the bus is owned by another device. The asymmetric drive (32mA high, 64mA low) is typical for ABT logic: the stronger low-side handles the higher capacitive load of a discharged bus line, while the high-side is sized for standard TTL thresholds. For a 10-bit bus running at 5V, this drive strength translates to clean edges on a 50pF–100pF load per line at moderate clock rates (50–100 MHz range, depending on trace length).
Lifecycle and compliance
TI lists the SN74ABT861DW as Active with no end-of-life notice. It is ROHS3 compliant, which covers the current EU RoHS exemption list. No LTB window or successor part has been published, so this remains a standard catalog item for new designs requiring a 5V 10-bit transceiver.