Specification	SN74LS21D

Current - Output High, Low [custom]	400 µA
Current - Output High, Low [custom]	8 mA
Input Logic Level - Low	0.8 V
Logic Type	AND Gate
Max Propagation Delay @ V, Max CL	20 ns
Mounting Type	Surface Mount
Number of Circuits	2
Number of Inputs	4
Operating Temperature [Max]	70 °C
Operating Temperature [Min]	0 °C
Package / Case	14-SOIC
Package / Case [x]	0.154 in
Package / Case [y]	3.9 mm
Voltage - Supply [Max]	5.25 V
Voltage - Supply [Min]	4.75 V

SN74LS21 Series

2-ch, 4-input, 4.75-V to 5.25-V 16-mA drive strength bipolar AND gate

Part	Number of Inputs	Input Logic Level - Low	Package / Case	Package / Case [y]	Package / Case [x]	Mounting Type	Max Propagation Delay @ V, Max CL	Operating Temperature [Max]	Number of Circuits	Voltage - Supply [Min]	Voltage - Supply [Max]	Logic Type	Current - Output High, Low [custom]	Current - Output High, Low [custom]	Input Logic Level - High	Input Logic Level - Low [Min]	Input Logic Level - Low [Max]	Supplier Device Package
Texas Instruments SN74LS21N	4	0.8 V	14-DIP	7.62 mm	0.3 "	Through Hole	20 ns	70 °C	2	4.75 V	5.25 V	AND Gate	400 µA	8 mA
Texas Instruments SN74LS21NS	4		14-SOIC	5.3 mm	0.209 "	Surface Mount	20 ns	70 °C	2	4.75 V	5.25 V	AND Gate	400 µA	8 mA	3.4 V	0.4 V	0.5 V	14-SO
Texas Instruments SN74LS21D	4	0.8 V	14-SOIC	3.9 mm	0.154 in	Surface Mount	20 ns	70 °C	2	4.75 V	5.25 V	AND Gate	400 µA	8 mA
Texas Instruments SN74LS21NSR	4	0.8 V	14-SOIC	5.3 mm	0.209 "	Surface Mount	20 ns	70 °C	2	4.75 V	5.25 V	AND Gate	400 µA	8 mA				14-SO
Texas Instruments SN74LS21DR	4	0.8 V	14-SOIC	3.9 mm	0.154 in	Surface Mount	20 ns	70 °C	2	4.75 V	5.25 V	AND Gate	400 µA	8 mA
Texas Instruments SN74LS21NG4	4	0.8 V	14-DIP	7.62 mm	0.3 "	Through Hole	20 ns	70 °C	2	4.75 V	5.25 V	AND Gate	400 µA	8 mA

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 1.33
		10	$ 1.19
		50	$ 1.13
		100	$ 0.92
		250	$ 0.86
		500	$ 0.76
Texas Instruments	TUBE	1	$ 0.98
		100	$ 0.76
		250	$ 0.56
		1000	$ 0.40

Description

General part information

SN74LS21 Series

These devices contain two independent 4-input AND gates.

The SN54LS21 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74LS21 is characterized for operation from 0°C to 70°C.

These devices contain two independent 4-input AND gates.

Documents

Technical documentation and resources

SN74LS21D

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SN74LS21D

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Technical Specifications

SN74LS21 Series

Pricing

Description

SN74LS21 Series

Documents

TI IBIS File Creation, Validation, and Distribution Processes

Live Insertion

Designing With Logic (Rev. C)

Input and Output Characteristics of Digital Integrated Circuits

Understanding and Interpreting Standard-Logic Data Sheets (Rev. C)

Logic Guide (Rev. AB)

Designing with the SN54/74LS123 (Rev. A)

LOGIC Pocket Data Book (Rev. B)

Semiconductor Packing Material Electrostatic Discharge (ESD) Protection

Dual 4-Input Positive-AND Gates datasheet

SN74LS21 Series