SN54LS257B

QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS The LSTTL / MSI SN54 / 74LS257B and the SN54 / 74LS258B are Quad 2-Input Multiplexers with 3-state outputs. Four bits of data from two sources can be selected using a Common Data Select input. The four outputs present the selected data in true (non-inverted) form. The outputs may be switched to a high impedance state with a HIGH on the common Output Enable (EO) Input, allowing the outputs to interface directly with bus oriented systems. It is fabricated with the Schottky barrier diode process for high speed and is completely compatible with all Motorola TTL families. SN54/74LS257B SN54/74LS258B QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS LOW POWER SCHOTTKY Schottky Process For High Speed Multiplexer Expansion By Tying Outputs Together Non-Inverting 3-State Outputs Input Clamp Diodes Limit High Speed Termination Effects Special Circuitry Ensures Glitch Free Multiplexing ESD > 3500 Volts CONNECTION DIAGRAM DIP (TOP VIEW) VCC 16 E0 15 I0c 14 I1c 13 Zc 12 I0d 11 I1d 10 Zd 9 J SUFFIX CERAMIC CASE 620-09 16 1 16 1 N SUFFIX PLASTIC CASE 648-08 SN54/74LS257B VCC = PIN 16 GND = PIN 8 16 1 D SUFFIX SOIC CASE 751B-03 1 S VCC 16 2 I0a E0 15 3 I1a I0c 14 4 Za I1c 13 5 I0b Zc 12 6 I1b I0d 11 7 Zb I1d 10 8 GND Zd 9 ORDERING INFORMATION SN54LSXXXJ SN74LSXXXN SN74LSXXXD NOTE: The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-Line Package. Ceramic Plastic SOIC SN54/74LS258B 1 S 2 I0a ...