SN74LS221NSR

Texas Instruments

0℃~+70℃ 2 26mA 4.75V~5.25V 400uA 45ns 74LS 8mA Monostable Reset input、Adjustable pulse width、Dual edge triggering SOIC-16-208mil Monostable Multivibrators ROHS

Extended

Datasheetti/SN74LS221NSR

Category: Monostable Multivibrators
Package: SOIC-16-208mil
Pins: 16

Overview

The SN74LS221NSR is a monostable Multivibrator made by Texas Instruments in a SOIC-16-208mil package with 16 pins. 0℃~+70℃ 2 26mA 4.75V~5.25V 400uA 45ns 74LS 8mA Monostable Reset input、Adjustable pulse width、Dual edge triggering SOIC-16-208mil Monostable Multivibrators ROHS.

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. 68 are in stock at JLCPCB (part C2652512).

Symbol

74xx:74LS221From KiCad's library

Footprint

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

Parameters

Current - Output High(IOH): 400uA
Current - Output Low(IOL): 8mA
Function: Dual edge triggering
Logic Family: 74LS
Logic Type: Monostable
Number Of Channels: 2
Operating Temperature: 0℃~+70℃
Propagation Delay: 45ns
Quiescent Current: 26mA
Voltage - Supply: 4.75V~5.25V

Order codes

SN74LS221NSRLCSC C2652512

Pinout

The pins of the SN74LS221NSR
Pin	Name	Type
1	A	Input
2	B	Input
3	CLR	Input
4	Q	Output
5	Q	Output
6	Cext	Input
7	RCext	Input
8	GND	Power in
9	A	Input
10	B	Input
11	CLR	Input
12	Q	Output
13	Q	Output
14	Cext	Input
15	RCext	Input
16	VCC	Power in

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Questions

Is there a KiCad symbol and footprint for the SN74LS221NSR?

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.

What package is the SN74LS221NSR?

SOIC-16-208mil, with 16 pins. Its footprint is drawn on this page.

Where is the SN74LS221NSR datasheet?

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

Where can I order the SN74LS221NSR?

JLCPCB lists it as part C2652512, with 68 in stock; the sellers' links on this page open their listings.

What can replace the SN74LS221NSR?

Parts like it in the library: the DM74LS123SJ by onsemi, the 74HC4538FP-E by Renesas Electronics, the HD74HC123AFPEL by Renesas Electronics and the HD74HC4538FPEL by Renesas Electronics. Check their datasheets: a part that fits the footprint may still differ in its ratings.