The HCF4555B is a dual 1 of 4 decoder/demultiplexer integrated circuit with standardized symmetrical output characteristics and multiple packaging options. It has standardized quiescent current and parametric ratings, and meets the requirements of JEDEC JESD13B standard specifications. The product has two select inputs (A and B), an enable input (E), and four mutually exclusive outputs. When the enable input is high, the outputs are low regardless of the state of the select inputs A and B.
The HCF4555B is a monolithic integrated circuit that provides two independent 1‑of‑4 decoders/demultiplexers. Each decoder has two select inputs (A and B), an enable input (E), and four mutually exclusive outputs that are high when selected.
The device is offered in DIP‑16 and SOP‑16 packages, supports supply voltages from 3 V to 20 V, and includes specifications such as quiescent current, propagation delay, and power dissipation. Mechanical dimensions for both DIP‑16 and SO‑16 packages are provided, along with typical application circuits.
| Supply Voltage (recommended) | 3 V to 20 V |
|---|---|
| Power Dissipation per Package | 200 mW |
| Top Operating Temperature | -55 °C to +125 °C |
| Propagation Delay (5 V) | 220 ns typical |
The recommended supply voltage is 3 V to 20 V.
The device can dissipate up to 200 mW per package.
The HCF4555B operates from –55 °C up to +125 °C.