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Product Detailed Parameters
- Description：IDENTITY COMPARATOR
- Series：*
- Mfr：Texas Instruments
- Package：Bulk
- Type：-
- Number of Bits：-
- Output：-
- Output Function：-
- Voltage - Supply：-
- Current - Output High, Low：-
- Max Propagation Delay @ V, Max CL：-
- Current - Quiescent (Iq)：-
- Operating Temperature：-
- Package / Case：-
- Supplier Device Package：-
- Mounting Type：-
- Grade：-
- Qualification：-
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Overview
The SN74AC11521DW is an octal identity comparator manufactured by Texas Instruments in the SOIC-24 package. It compares two 8-bit binary words and outputs a HIGH signal only when all corresponding bits are identical. The device operates within a supply voltage range of 2V to 6V, featuring low input capacitance for high-speed performance. It includes Schmitt-trigger inputs on one side to accept slow-changing signals, ensuring noise immunity during data comparison tasks.
Feature Summary
- Performs parallel comparison of two 8-bit digital words
- Outputs logic high when input vectors are identical
- Schmitt-trigger inputs provide noise filtering
Applications
- Digital system address matching
- Data integrity verification
- Comparator circuits in microprocessor interfaces
Procurement Notes
Verify the specific suffix 'DW' corresponds to the SOIC-24 package variant. Confirm RoHS compliance status as indicated in official datasheets. Ensure operating temperature ranges meet industrial requirements. Cross-reference pinouts with standard 74AC series documentation to prevent interface mismatches during integration.
Selection Notes
Select this component for applications requiring precise equality checking of 8-bit data streams. Consider the AC speed grade for high-frequency operations. Verify that the Schmitt-trigger input capability aligns with the signal source characteristics. Ensure the SOIC-24 footprint fits the target PCB layout constraints.
Part Context
This part belongs to the Texas Instruments 74AC logic family, known for CMOS technology offering high speed and low power consumption. The 11521 designation specifically identifies it as an octal identity comparator within the broader catalog of digital logic integrated circuits designed for general-purpose computing and control systems.
Replacement Considerations
Equivalent parts include other octal identity comparators from compatible logic families. Verify pin compatibility before substitution. Check if alternative manufacturers offer direct replacements with identical electrical specifications and package dimensions.
