1-of-4 decoder/demultiplexer
HEF4555B
1-of-4 decoder/demultiplexer
Rev. 5 — 18 November 2011
Product data sheet
1. General description
The HEF4555...
Description
HEF4555B
1-of-4 decoder/demultiplexer
Rev. 5 — 18 November 2011
Product data sheet
1. General description
The HEF4555B contains two 1-of-4 decoders/demultiplexers. Each has two address inputs (nA0 and nA1, an active LOW enable input (nE) and four mutually exclusive outputs which are active HIGH (nY0 to nY3). When used as a decoder, nE when HIGH, forces nY0 to nY3 LOW. When used as a demultiplexer, the appropriate output is selected by the information on nA0 and nA1 with nE as data input. All unselected outputs are LOW.
It operates over a recommended VDD power supply range of 3 V to 15 V referenced to VSS (usually ground). Unused inputs must be connected to VDD, VSS, or another input.
2. Features and benefits
Fully static operation 5 V, 10 V, and 15 V parametric ratings Standardized symmetrical output characteristics Specified from 40 C to +85 C Complies with JEDEC standard JESD 13-B
3. Applications
Code conversion Address decoding Demultiplexing: when using the enable input as data input
4. Ordering information
Table 1. Ordering information All types operate from 40 C to +85 C.
Type number Package
Name
Description
HEF4555BP
DIP16
plastic dual in-line package; 16 leads (300 mil)
HEF4555BT
SO16
plastic small outline package; 16 leads; body width 3.9 mm
Version SOT38-4 SOT109-1
NXP Semiconductors
5. Functional diagram
HEF4555B
1-of-4 decoder/demultiplexer
2 1A0 3 1A1
DECODER
1Y0 4 1Y1 5 1Y2 6 1Y3 7
1 1E
14 2A0 13 2A1
DECODER
2Y0 12 ...
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