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SN54LS540J Datasheet(PDF) 1 Page - Motorola, Inc |
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SN54LS540J Datasheet(HTML) 1 Page - Motorola, Inc |
1 / 5 page 5-568 FAST AND LS TTL DATA OCTAL BUFFER/LINE DRIVER WITH 3-STATE OUTPUTS The SN54/ 74LS540 and SN54 / 74LS541 are octal buffers and line drivers with the same functions as the LS240 and LS241, but with pinouts on the opposite side of the package. These device types are designed to be used as memory address drivers, clock drivers and bus-oriented transmitters / receivers. These devices are especially useful as output ports for the microprocessors, allowing ease of layout and greater PC board density. • Hysteresis at Inputs to Improve Noise Margin • PNP Inputs Reduce Loading • 3-State Outputs Drive Bus Lines • Inputs and Outputs Opposite Side of Package, Allowing Easier Interface to Microprocessors • Input Clamp Diodes Limit High-Speed Termination Effects LOGIC AND CONNECTION DIAGRAMS DIP (TOP VIEW) 18 17 16 15 14 13 1 2 3 4 5 6 7 20 19 8 VCC 9 10 GND 12 11 SN54 / 74LS540 SN54 / 74LS541 18 17 16 15 14 13 1 2 3 4 5 6 7 20 19 8 VCC 9 10 GND 12 11 GUARANTEED OPERATING RANGES Symbol Parameter Min Typ Max Unit VCC Supply Voltage 54 74 4.5 4.75 5.0 5.0 5.5 5.25 V TA Operating Ambient Temperature Range 54 74 – 55 0 25 25 125 70 °C IOH Output Current — High 54 74 – 12 – 15 mA IOL Output Current — Low 54 74 12 24 mA SN54/74LS540 SN54/74LS541 OCTAL BUFFER / LINE DRIVER WITH 3-STATE OUTPUTS LOW POWER SCHOTTKY ORDERING INFORMATION SN54LSXXXJ Ceramic SN74LSXXXN Plastic SN74LSXXXDW SOIC 20 1 J SUFFIX CERAMIC CASE 732-03 20 1 N SUFFIX PLASTIC CASE 738-03 20 1 DW SUFFIX SOIC CASE 751D-03 |
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