54LS156DMQB, Decoder/Driver, Bulk, Active.
| Parameter | Value |
|---|---|
| Series | * |
| Package | Bulk |
That is typical for DIP-packaged logic in lower-volume builds. If your pick-and-place line expects reels, you will need to hand-place or use a tube feeder; Bulk is the standard for prototyping, repair, and small-batch production.
It is a decoder/driver: it decodes binary address inputs into a single active output line, and it can drive that output with enough current to directly power a load such as a relay coil, LED, or logic input. This makes it useful for memory address decoding, display multiplexing, and control-signal routing in digital circuits.
The 54LS156DMQB is the military-temperature-grade version of the 74LS156. The 54LS suffix means it is tested and guaranteed over the -55 to +125 °C range, while the 74LS version is typically rated for 0 to 70 °C or -40 to +85 °C. Function and pinout are the same, but the 54LS part carries the wider temperature guarantee and is built to MIL-STD screening requirements.