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SN54LS42

Motorola Inc
Part Number SN54LS42
Manufacturer Motorola Inc
Description ONE-OF-TEN DECODER
Published Apr 16, 2005
Detailed Description SN54/74LS42 ONE-OF-TEN DECODER The LSTTL / MSI SN54 / 74LS42 is a Multipurpose Decoder designed to accept four BCD input...
Datasheet PDF File SN54LS42 PDF File

SN54LS42
SN54LS42

Overview
SN54/74LS42 ONE-OF-TEN DECODER The LSTTL / MSI SN54 / 74LS42 is a Multipurpose Decoder designed to accept four BCD inputs and provide ten mutually exclusive outputs.
The LS42 is fabricated with the Schottky barrier diode process for high speed and is completely compatible with all Motorola TTL families.
ONE-OF-TEN DECODER LOW POWER SCHOTTKY • • • • Multifunction Capability Mutually Exclusive Outputs Demultiplexing Capability Input Clamp Diodes Limit High Speed Termination Effects CONNECTION DIAGRAM DIP (TOP VIEW) VCC 16 A0 15 A1 14 A2 13 A3 12 9 11 8 10 7 9 NOTE: The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-Line Package.
16 1 J SUFFIX CERAMIC CASE 620-09 1 0 2 1 3 2 4 3 5 4 6 5 7 6 8 GND 16 1 N SUFFIX PLASTIC CASE 648-08 PIN NAMES LOADING (Note a) HIGH LOW 0.
25 U.
L.
5(2.
5) U.
L.
16 1 A0 – A3 0 to 9 Address Inputs Outputs, Active LOW (Note b) 0.
5 U.
L.
10 U.
L.
D SUFFIX SOIC CASE 751B-03 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.
ORDERING INFORMATION SN54LSXXJ SN74LSXXN SN74LSXXD Ceramic Plastic SOIC LOGIC DIAGRAM A0 15 A1 14 A2 13 A3 12 LOGIC SYMBOL 15 14 13 12 A0 A1 A2 A3 0 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 9 10 11 1 2 3 4 5 6 7 9 10 11 VCC = PIN 16 GND = PIN 8 0 1 2 3 4 5 6 7 8 9 VCC = PIN 16 GND = PIN 8 = PIN NUMBERS FAST AND LS TTL DATA 5-53 SN54/74LS42 FUNCTIONAL DESCRIPTION The LS42 decoder accepts four active HIGH BCD inputs and provides ten mutually exclusive active LOW outputs, as shown by logic symbol or diagram.
The active LOW outputs facilitate addressing other MSI units with LOW input enables.
The logic design of the LS42 ensures that all outputs are HIGH when binary codes greater than nine are applied to the inputs.
The most significant input A3 produces a useful inhibit function when the LS42 is used as a one-of-eight decoder.
The A3 input can ...


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