74ALS521 Series

8-Bit Identity/Magnitude Comparators (P=Q) with Enable

Catalog(3 parts)

Part	Operating Temperature▲▼	Number of Bits▲▼	Mounting Type	Package / Case	Package / Case▲▼	Package / Case▲▼	Output Function	Supplier Device Package	Type	Voltage - Supply▲▼	Voltage - Supply▲▼	Current - Output High, Low▲▼	Max Propagation Delay @ V, Max CL▲▼	Package / Case▲▼
Texas Instruments SN74ALS521N Magnitude Comparator Bit Active Low Output A=B 20-PDIP	70 °C	8 ul	Through Hole	20-DIP	0.007619999814778566 m	0.007619999814778566 m	A=B	20-PDIP	Identity Comparator	5.5 V	4.5 V	0.0026000000070780516 A, 0.024000000208616257 A	1.999999987845058e-8 s
Texas Instruments SN74ALS521DWRE4 Magnitude Comparator Bit Active Low Output A=B 20-SOIC	70 °C	8 ul	Surface Mount	20-SOIC			A=B	20-SOIC	Identity Comparator	5.5 V	4.5 V	0.0026000000070780516 A, 0.024000000208616257 A	1.999999987845058e-8 s	0.007493000011891127 m, 0.007499999832361937 m
Texas Instruments SN74ALS521NSR Magnitude Comparator Bit Active Low Output A=B 20-SO	70 °C	8 ul	Surface Mount	20-SOIC			A=B	20-SO	Identity Comparator	5.5 V	4.5 V	0.0026000000070780516 A, 0.024000000208616257 A	1.999999987845058e-8 s	0.0052999998442828655 m, 0.005308600142598152 m

Key Features

• Compare Two 8-Bit WordsChoice of Totem-Pole or Open-Collector OutputsSN74ALS518 and ´ALS520 Have 20-k Pullup Resistors on Q InputsPackage Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPsSN74ALS521 is identical to ´ALS688.Compare Two 8-Bit WordsChoice of Totem-Pole or Open-Collector OutputsSN74ALS518 and ´ALS520 Have 20-k Pullup Resistors on Q InputsPackage Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPsSN74ALS521 is identical to ´ALS688.

Description

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. 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.