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74LS540

Motorola
Part Number 74LS540
Manufacturer Motorola
Description OCTAL BUFFER/LINE DRIVER
Published Apr 23, 2005
Detailed Description OCTAL BUFFER/LINE DRIVER WITH 3-STATE OUTPUTS The SN54/ 74LS540 and SN54 / 74LS541 are octal buffers and line drivers wi...
Datasheet PDF File 74LS540 PDF File

74LS540
74LS540

Overview
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.
SN54/74LS540 SN54/74LS541 OCTAL BUFFER/ LINE DRIVER WITH 3-STATE OUTPUTS LOW POWER SCHOTTKY • • • • 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) VCC 20 19 20 1 J SUFFIX CERAMIC CASE 732-03 SN54 / 74LS540 18 17 16 15 14 13 12 11 20 1 N SUFFIX PLASTIC CASE 738-03 1 2 3 4 5 6 7 8 9 10 GND 20 1 DW SUFFIX SOIC CASE 751D-03 VCC 20 19 SN54 / 74LS541 18 17 16 15 14 13 12 11 ORDERING INFORMATION SN54LSXXXJ Ceramic SN74LSXXXN Plastic SN74LSXXXDW SOIC 1 2 3 4 5 6 7 8 9 10 GND GUARANTEED OPERATING RANGES Symbol VCC TA IOH IOL Supply Voltage Operating Ambient Temperature Range Output Current — High Output Current — Low Parameter 54 74 54 74 54 74 54 74 Min 4.
5 4.
75 – 55 0 Typ 5.
0 5.
0 25 25 Max 5.
5 5.
25 125 70 – 12 – 15 12 24 Unit V °C mA mA FAST AND LS TTL DATA 5-568 SN54/74LS540 • SN54/74LS541 BLOCK DIAGRAM LS540 (1) E1 E2 (19) E1 E2 (1) (19) LS541 INPUTS E1 E2 L X H L D H X X L (2) (18) Y1 OUTPUTS LS540 L Z Z H LS541 H Z Z L (2) D1 (18) Y1 D1 (3) D2 (4) D3 (5) (17) Y2 (16) Y3 (15) Y4 D3 D2 (3) (17) Y2 L H X L (4) (16) Y3 D4 D4 (5) (15) Y4 L = LOW Voltage Level H = HIGH Voltage Level X = Immaterial Z = High Impedance (6) D5 (7) D6 (8) D7 (9) D8 (14) Y5 (13) Y6 (12) Y7 (11) Y8 D8 D7 D6 D5 (6) (14) Y5 (7) (13) Y6 (8...


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