74ALS253

INTEGRATED CIRCUITS 74ALS253 Dual 4–input multiplexer (3–State) Product specification IC05 Data Handbook 1991 Feb 08 Philips Semiconductors Philips Semiconductors Product specification Dual 4-input multiplexer (3-State) 74ALS253 FEATURES 3-State outputs for bus interface and multiplex operation Common select inputs Separate output enable inputs DESCRIPTION The 74ALS253 has two identical 4-input multiplexers with 3-State outputs which select 2 bits from four sources by using common select input (S0, S1). When the individual output enable (OEa, OEb) inputs of the 4-input multiplexers are High, the outputs are forced to a High impedance (Z) state. The 74ALS253 is the logic implementation of 2-pole, 4-position switch being determined by the logic levels supplied to the common select inputs. To avoid exceeding the maximum current ratings when the outputs of the 3-State devices are tied together, all but one device must be in the High impedance state. Therefore, only one output enable must be achieved at a time. TYPICAL SUPPLY CURRENT (TOTAL) 8mA PIN CONFIGURATION OEa S1 I3a I2a I1a I0a Ya GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC OEb S0 I3b I2b I1b I0b Yb SF00798 ORDERING INFORMATION ORDER CODE DESCRIPTION COMMERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C 74ALS253N 74ALS253D 74ALS253DB DRAWING NUMBER TYPE 74ALS253 TYPICAL PROPAGATION DELAY 7.0ns 16-pin plastic DIP 16-pin plastic SO 16-pin plastic SSOP Type II SOT38-4 SOT109-1 SOT338-1 INPUT AND OUTPUT ...