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SN74LS221NS on a board, in 3D

SN74LS221NS

Texas Instruments

Reset input、Adjustable pulse width - Monostable Multivibrators

Extended
DatasheetJLCPCBLCSCti/SN74LS221NS
Category
Monostable Multivibrators
Pins
16

Overview

The SN74LS221NS is a monostable Multivibrator made by Texas Instruments with 16 pins. Reset input、Adjustable pulse width - Monostable Multivibrators.

PCBKit's library has its KiCad symbol (74xx:74LS221, 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 C7011864).

Symbol

A1B2CLR3Q4Q13Cext14RCext15
74xx:74LS221From KiCad's library

Footprint

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

Parameters

1
Function
Reset input, Adjustable pulse width

Order codes

1

Pinout

16
The pins of the SN74LS221NS
PinNameType
1AInput
2BInput
3CLRInput
4QOutput
5QOutput
6CextInput
7RCextInput
8GNDPower in
9AInput
10BInput
11CLRInput
12QOutput
13QOutput
14CextInput
15RCextInput
16VCCPower in

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Questions

Is there a KiCad symbol and footprint for the SN74LS221NS?

Yes. The symbol is 74xx:74LS221 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 SN74LS221NS datasheet?

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

Where can I order the SN74LS221NS?

JLCPCB lists it as part C7011864, with 0 in stock; the sellers' links on this page open their listings.

What can replace the SN74LS221NS?

Parts like it in the library: the SN74LS221NSR by Texas Instruments, the DM74LS123SJ by onsemi, the 74HC4538FP-E by Renesas Electronics and the HD74HC123AFPEL by Renesas Electronics. Check their datasheets: a part that fits the footprint may still differ in its ratings.

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