ONE-OF-TEN DECODER
The LSTTL / MSI SN54 / 74LS42 is a Multipurpose Decoder designed to accept four BCD inputs and provid...
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.
Multifunction Capability Mutually Exclusive Outputs Demultiplexing Capability Input Clamp Diodes Limit High Speed Termination Effects
CONNECTION DIAGRAM DIP (TOP VIEW)
VCC A0 A1 A2 A3 9 8 7 16 15 14 13 12 11 10 9
NOTE: The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-Line Package.
12 01
3 4 56 2 3 45
78 6 GND
PIN NAMES
A0 – A3 0 to 9
Address Inputs Outputs, Active LOW (Note b)
LOADING (Note a)
HIGH
LOW
0.5 U.L.
0.25 U.L.
10 U.L. 5(2.5) U.L.
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.
A0
15
LOGIC DIAGRAM
A1
14
A...
