Overview: SN74LS42
One−of−Ten Decoder
The LSTTL / MSI SN74LS42 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 ON Semiconductor TTL families.
• Multifunction Capability • Mutually Exclusive Outputs • Demultiplexing Capability • Input Clamp Diodes Limit High Speed Termination Effects http://onsemi.com
LOW POWER SCHOTTKY GUARANTEED OPERATING RANGES Symbol Parameter Min Typ Max Unit VCC Supply Voltage TA Operating Ambient Temperature Range 4.75 5.0 5.25 V 0 25 70 °C IOH Output Current − High IOL Output Current − Low −0.4 mA 8.0 mA 16 1 PLASTIC N SUFFIX CASE 648
16 1
SOIC D SUFFIX CASE 751B © Semiconductor Components Industries, LLC, 2006
July, 2006 − Rev. 8 16 1
SOEIAJ M SUFFIX CASE 966 ORDERING INFORMATION Device Package Shipping SN74LS42N 16 Pin DIP 2000 Units/Box SN74LS42D SOIC−16 38 Units/Rail SN74LS42DR2 SOIC−16 2500/Tape & Reel SN74LS42M SOEIAJ−16 See Note 1 SN74LS42MEL SOEIAJ−16 See Note 1 1. For ordering information on the EIAJ version of the SOIC package, please contact your local ON Semiconductor representative. 1 Publication Order Number: SN74LS42/D SN74LS42 CONNECTION DIAGRAM DIP (TOP VIEW) VCC A0 A1 A2 A3 9 16 15 14 13 12 11
1 2 3 4 56 0 1 2 3 45 87 10 9
78 6 GND NOTE: The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-Line Package. PIN NAMES
A0 − A3 0 to 9 Address Inputs Outputs, Active LOW LOADING (Note a) HIGH LOW 0.5 U.L. 10 U.L. 0.25 U.L. 5 U.L. NOTES: a) 1 TTL Unit Load (U.L.) = 40 mA HIGH/1.6 mA LOW. LOGIC SYMBOL 15 14 13 12
A0 A1 A2 A3
012345 6 7 89
1 2 3 4 5 6 7 9 10 11 VCC = PIN 16 GND = PIN 8 A0
15 LOGIC DIAGRAM A1
14 A2
13 A3
12 1 2 3 4 5 6 7 9 10 11 0 1 2 3 4 5 6 7 8 9 VCC = PIN 16 GND = PIN 8
= PIN NUMBERS http://onsemi.
