1-of-10 decoder HEF4028B MSI is a 4-bit BCD to 1-of-10 active HIGH decoder.
The Philips HEF4028B is a 4‑bit BCD to 1‑of‑10 active‑HIGH decoder IC, part of Philips Semiconductors' MSI family. It converts binary‑coded‑decimal inputs on pins Ao‑Ag to one of ten active‑HIGH outputs O0‑O9, with optional enable functions and demultiplexer capability.
The device is offered in three package styles—16‑lead DIL plastic (HEF4028BP(N)), 16‑lead DIL ceramic (HEF4028BD(F)), and 16‑lead SO plastic (HEF4028BT(D)). Electrical characteristics include input transition times under 20 ns, typical propagation delays of 73 ns plus load‑capacitance term, and output transition times of about 10 ns plus load‑capacitance term.
| Logic type | 4-bit BCD to 1-of-10 active HIGH decoder |
|---|---|
| Package (plastic DIL) | 16-lead DIL (SOT38-1) |
| Package (SO plastic) | 16-lead SO (SOT109-1) |
| Input transition time | < 20 ns |
| Typical propagation delay | 73 ns + (0.55 ns/pF) CL |
| Typical output transition time | 10 ns + (1.0 ns/pF) CL |
It is a 4‑bit BCD to 1‑of‑10 active‑HIGH decoder that converts BCD inputs to a single high output.
Three options are offered: 16‑lead DIL plastic (HEF4028BP(N)), 16‑lead DIL ceramic (HEF4028BD(F)), and 16‑lead SO plastic (HEF4028BT(D)).
Input transition times are specified as less than 20 ns.
Typical propagation delay is 73 ns plus (0.55 ns per pF) of load capacitance.