Skip to the content
PCBKitNew board
SN74LS42NS on a board, in 3D

SN74LS42NS

Texas Instruments

-55℃~+125℃ 13mA 30ns@5.0V,50pF 400uA 4mA Decoder Short-Circuit Protection Single Supply - Signal Switches, Multiplexers, Decoders

Extended
DatasheetJLCPCBLCSCti/SN74LS42NS
Category
Signal Switches, Multiplexers, Decoders
Pins
16

Overview

The SN74LS42NS is a signal Switches, Multiplexers, Decoder made by Texas Instruments with 16 pins. -55℃~+125℃ 13mA 30ns@5.0V,50pF 400uA 4mA Decoder Short-Circuit Protection Single Supply - Signal Switches, Multiplexers, Decoders.

PCBKit's library has its KiCad symbol (74xx:74LS42, from KiCad's library) and its footprint (EasyEDA_Cloud:SOIC-16_L10.2-W5.3-P1.27-LS7.8-BL, from EasyEDA), ready for a KiCad board. JLCPCB lists it (part C7083305).

Symbol

01122334455667GND879810911A312A213A114A015VCC16
74xx:74LS42From KiCad's library

Footprint

12345678910111213141516
EasyEDA_Cloud:SOIC-16_L10.2-W5.3-P1.27-LS7.8-BLFrom EasyEDA

Parameters

8
Current - Output High(IOH)
400uA
Current - Output Low(IOL)
4mA
Function
Short-Circuit Protection
Operating temperature
-55℃~+125℃
Propagation Delay
30ns@5.0V,50pF
Quiescent Current
13mA
Type
Decoder
Voltage Supply Source
Single Supply

Order codes

1

Pinout

16
The pins of the SN74LS42NS
PinNameType
10Output
21Output
32Output
43Output
54Output
65Output
76Output
8GNDPower in
97Output
108Output
119Output
12A3Input
13A2Input
14A1Input
15A0Input
16VCCPower in

Show this part on your page

A live frame, for any web page
<iframe src="https://pcbkit.io/embed/parts/ti/SN74LS42NS" title="SN74LS42NS in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>
A picture
<img src="https://pcbkit.io/embed/parts/ti/SN74LS42NS.jpg" alt="SN74LS42NS" width="1200" height="900">
A picture that opens the part, for a README
[![SN74LS42NS](https://pcbkit.io/embed/parts/ti/SN74LS42NS.jpg?size=s)](https://pcbkit.io/parts/ti/SN74LS42NS)

Questions

Is there a KiCad symbol and footprint for the SN74LS42NS?

Yes. The symbol is 74xx:74LS42 and the footprint EasyEDA_Cloud:SOIC-16_L10.2-W5.3-P1.27-LS7.8-BL, both drawn on this page. PCBKit places them on a board for you when you design with it.

Where is the SN74LS42NS datasheet?

Texas Instruments publishes it: the Datasheet link on this page opens it.

Where can I order the SN74LS42NS?

JLCPCB lists it as part C7083305, with 0 in stock; the sellers' links on this page open their listings.

What can replace the SN74LS42NS?

Parts like it in the library: the SN74AHC138NSR by Texas Instruments, the SN74LS145NSR by Texas Instruments, the SN74LS155ANS by Texas Instruments and the SN74ALS157ANS by Texas Instruments. Check their datasheets: a part that fits the footprint may still differ in its ratings.

Parts like it

8