74ALS139

INTEGRATED CIRCUITS 74ALS139 Dual 1-of-4 decoder/demultiplexer Product specification IC05 Data Handbook 1991 Feb 08 Philips Semiconductors Philips Semiconductors Product specification Dual 1-of-4 decoder/demultiplexer 74ALS139 FEATURES Demultiplexing capability Two independent 1-of-4 decoders Multi-function capability DESCRIPTION The 74ALS139 is a dual 1-of-4 decoder/demultiplexer. This device has two independent decoders, each accepting two binary weighted inputs (A0n, A1n) and providing four mutually exclusive active-Low outputs (Q0n–Q3n). Each decoder has an active-Low enable (E). When E is High, every output is forced High. The enable can be used as the data input for a 1-of-4 demultiplexer application. TYPICAL SUPPLY CURRENT (TOTAL) 4mA PIN CONFIGURATION Ea A0a A1a Q0a Q1a Q2a Q3a GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC Eb A0b A1b Q0b Q1b Q2b Q3b SF00129 TYPE 74ALS139 TYPICAL PROPAGATION DELAY 6.0ns ORDERING INFORMATION ORDER CODE DESCRIPTION COMMERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C 74ALS139N 74ALS139D DRAWING NUMBER 16-pin plastic DIP 16-pin plastic SO SOT38-4 SOT109-1 INPUT AND OUTPUT LOADING AND FAN-OUT TABLE PINS A0n, A1n Ea, Eb Q0n, Q1n Address inputs Enable inputs (active-Low) Data outputs DESCRIPTION 74ALS (U.L.) HIGH/LOW 1.0/1.0 1.0/1.0 20/80 LOAD VALUE HIGH/LOW 20µA/0.1mA 20µA/0.1mA 0.4mA/8mA NOTE: One (1.0) ALS unit load is defined as: 20µA in the High state and 0.1mA in the Low state. LOGIC SYMBOL 1 2 3 15 14 13 IEC/I...