The TI SN74ABT245BDW is an 8-bit non-inverting bus transceiver from the 74ABT family, packing a single 8-bit element with 3-state outputs in a 20-SOIC wide-body package. It runs on a 4.5V to 5.5V supply rail — strictly 5V logic territory — and delivers 32mA source, 64mA sink per output. That sink current is the headline number: it can drive heavily loaded parallel buses, backplane traces, or multiple CMOS inputs without sagging the logic levels. If your BOM already runs 5V logic and needs a bidirectional bus buffer that can handle a long trace or a fan-out of ten loads, this is the part.
5V-only supply — compatibility check for mixed-voltage boards
The SN74ABT245BDW operates from 4.5V to 5.5V only. It is not a 3.3V-tolerant part — feeding 3.3V into the VCC pin will not meet the minimum supply and the outputs will not swing to valid CMOS levels. If your board has a 3.3V bus on the other side, you need a level-shifting transceiver like the 74LVC245 or 74AVC family. For pure 5V systems, the ABT245 gives you the drive strength that the lower-voltage families cannot match.
Output drive — 64mA sink for heavy bus loads
Each output can sink 64mA while staying within VOL limits — that is enough to drive a 50-ohm terminated line or a bank of eight LSTTL inputs. The 32mA source side is more modest but still double what a standard 74HC part delivers. If your bus has long traces or many loads, this part keeps the noise margin intact.
No end-of-life notice, no last-time-buy pressure. It is a current-production part available through the standard TI distribution channel.