8-bit bus transceiver in wide-body SOIC
The SN74ABT646ADWR is an 8-bit non-inverting transceiver with 3-state outputs, part of the 74ABT logic family from Texas Instruments. It packs one element of eight bits into a 24-SOIC wide-body package (7.50 mm width) — the same footprint as the industry-standard 24-pin SOIC wide, so it drops onto existing pads without a board spin. The output drive is rated 32 mA source and 64 mA sink — enough to drive a heavily loaded backplane or a bank of LED indicators without external buffers. The 3-state outputs let multiple transceivers share a common bus; the OE and DIR pins control direction and high-impedance state.
Industrial temperature grade and sourcing posture
The 24-SOIC package is surface-mount with a 1.27 mm pitch — reworkable with hot air if the board layout provides adequate thermal relief on the ground pins.