SN74ALS521N

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Texas Instruments

COMPARATOR ICS 8-BIT ID COMPARATORS W/OPEN-COLLECTOR OUT ROHS COMPLIANT: YES

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SN74ALS521N

Active

Texas Instruments

COMPARATOR ICS 8-BIT ID COMPARATORS W/OPEN-COLLECTOR OUT ROHS COMPLIANT: YES

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Description Specifications Series Pricing CAD Documents

Description

General part information

74ALS521 Series

These identity comparators perform comparisons on two 8-bit binary or BCD words. The SN74ALS518 provides P = Q outputs, while the ´ALS520 and SN74ALS521 provide P = Q\ outputs. The SN74ALS518 has an open-collector output. The SN74ALS518 and ´ALS520 feature 20-k pullup resistors on the Q inputs for analog or switch data.

The SN54ALS520 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ALS518, SN74ALS520, and SN74ALS521 are characterized for operation from 0°C to 70°C.

Technical Specifications

Parameters and characteristics for this part

Specification	SN74ALS521N

Current - Output High	2.6 mA
Current - Output Low	24 mA
Max CL	50 pF
Max Propagation Delay	20 ns
Mounting Type	Through Hole
Number of Bits	8 bits
Operating Temperature (Max)	70 °C
Operating Temperature (Min)	0 °C
Output	Active Low
Output Function	A=B
Package Length	0.3 in
Package Name	20-PDIP, 20-DIP
Package Width	7.62 mm
Type	Identity Comparator
Voltage - Supply (Maximum)	5.5 V
Voltage - Supply (Minimum)	4.5 V

74ALS521 Series

Part	Type	Voltage - Supply (Maximum)	Voltage - Supply (Minimum)	Output Function	Mounting Type	Max Propagation Delay	Max CL	Operating Temperature (Max)	Current - Output High	Current - Output Low	Package Name	Output	Number of Bits	Package Length	Package Width
Texas Instruments SN74ALS521N	Identity Comparator	5.5 V	4.5 V	A=B	Through Hole	20 ns	50 pF	70 °C	2.6 mA	24 mA	20-DIP 20-PDIP	Active Low	8 bits	0.3 in	7.62 mm
Texas Instruments SN74ALS521DWRE4	Identity Comparator	5.5 V	4.5 V	A=B	Surface Mount	20 ns	50 pF	70 °C	2.6 mA	24 mA	20-SOIC	Active Low	8 bits	0.295 in	7.5 mm
Texas Instruments SN74ALS521NSR	Identity Comparator	5.5 V	4.5 V	A=B	Surface Mount	20 ns	50 pF	70 °C	2.6 mA	24 mA	20-SO 20-SOIC	Active Low	8 bits	0.209 in	5.3 mm
Texas Instruments SN74ALS521DWR	Identity Comparator	5.5 V	4.5 V	A=B	Surface Mount	20 ns	50 pF	70 °C	2.6 mA	24 mA	20-SOIC	Active Low	8 bits	0.295 in	7.5 mm
Texas Instruments SN74ALS521DW	Identity Comparator	5.5 V	4.5 V	A=B	Surface Mount	20 ns	50 pF	70 °C	2.6 mA	24 mA	20-SOIC	Active Low	8 bits	0.295 in	7.5 mm

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

8-Bit Identity Comparators datasheet (Rev. B)