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74LS157N
SN54/74LS157 QUAD 2-INPUT MULTIPLEXER The LSTTL / MSI SN54 / 74LS157 is a high speed Quad 2-Input Multiplexer. Four bits of data from two sources can be selected using the common Select and Enable inputs. The four buffered outputs present the selected data in the true (non-inverted) form. The LS157 can also be used to generate any four of the 16 different functions of two variables. The LS157 is fabricated with the Schottky barrier diode process for high speed and is completely compatible with all Motorola TTL families. • • • • • • QUAD 2-INPUT MULTIPLEXER Schottky Process for High Speed Multifunction Capability Non-Inverting Outputs Input Clamp Diodes Limit High Speed Termination Effects Special Circuitry Ensures Glitch Free Multiplexing ESD > 3500 Volts LOW POWER SCHOTTKY J SUFFIX CERAMIC CASE 620-09 CONNECTION DIAGRAM DIP (TOP VIEW) VCC 16 E 15 I0c 14 I1c 13 Zc I0d 11 12 I1d 10 Zd 9 16 1 NOTE: The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-Line Package. 1 S 2 I0a 3 I1d 4 Za 5 I0b 6 I1b 7 Zb N SUFFIX PLASTIC CASE 648-08 16 8 GND 1 PIN NAMES LOADING (Note a) LOW HIGH S E I0a – I0d I1a – I1d Za – Zd Common Select Input Enable (Active LOW) Input Data Inputs from Source 0 Data Inputs from Source 1 Multiplexer Outputs (Note b) 0.5 U.L. 0.5 U.L. 0.25 U.L. 0.25 U.L. 5 (2.5) U.L. 1.0 U.L. 1.0 U.L. 0.5 U.L. 0.5 U.L. 10 U.L. D SUFFIX SOIC CASE 751B-03 16 1 ORDERING INFORMATION NOTES: a) 1 TTL Unit Load (U.L.) = 40 µA HIGH/1.6 mA LOW. b) The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial (74) Temperature Ranges. SN54LSXXXJ SN74LSXXXN SN74LSXXXD Ceramic Plastic SOIC LOGIC DIAGRAM I0a I1a 2 3 I0b I1b 5 6 I0c I1c 14 13 I0d I1d E S 11 10 15 LOGIC SYMBOL 1 15 2 3 5 6 14 13 11 10 E I0a I1a I0b I1b I0c I1c I0d I1d 1 S Za 4 7 Za 9 12 Zb Zc Zd FAST AND LS TTL DATA 5-1 Zc Zd 4 VCC = PIN 16 GND = PIN 8 = PIN NUMBERS Zb 7 12 9 VCC = PIN 16 GND = PIN 8
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