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Product Detailed Parameters
- Description：IC COMPARATOR MAG 8BIT 20SOIC
- Series：74LS
- Mfr：Texas Instruments
- Package：Tube
- Type：Magnitude Comparator
- Number of Bits：8
- Output：Active Low
- Output Function：A=B, A>B
- Voltage - Supply：4.85V ~ 5.25V
- Current - Output High, Low：400µA, 24mA
- Max Propagation Delay @ V, Max CL：30ns @ 5V, 45pF
- Current - Quiescent (Iq)：-
- Operating Temperature：0°C ~ 70°C
- Package / Case：20-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：20-SOIC
- Mounting Type：Surface Mount
- Grade：-
- Qualification：-
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Overview
The SN74LS682DW is an 8-bit magnitude and identity comparator manufactured by Texas Instruments. It operates within a supply voltage range of 4.85 V to 5.25 V, with a maximum power supply current of 70 mA. The device features a propagation delay of 25 ns to 30 ns and utilizes a 20-pin SOIC surface-mount package. It supports logic functions for A=B and A>B comparisons, employing totem-pole outputs. The component is rated for operation between 0°C and +70°C.
Feature Summary
- Performs 8-bit binary or BCD magnitude comparison operations
- Provides dedicated output indicators for equality and greater-than conditions
- Utilizes standard TTL-compatible input structures
Applications
- Digital data comparison circuits
- Address decoding systems
- Error detection logic in digital processors
Procurement Notes
Verify the specific suffix (DW) confirms the SOIC-20 package and industrial temperature range. Confirm RoHS compliance status as indicated in official documentation. Ensure the source document explicitly lists this part number as active or obsolete to manage lifecycle expectations correctly before procurement.
Selection Notes
Select this component when an 8-bit magnitude comparison function is required within standard TTL logic families. The SN74LS682DW offers distinct outputs for equality and inequality states. Consider the 20-pin SOIC footprint for PCB layout constraints. Verify that the 70 mA maximum supply current fits the system power budget.
Part Context
This part belongs to the SN74LS series of logic comparators from Texas Instruments. It provides hardware-level comparison capabilities without requiring software intervention. The device integrates multiple comparison gates into a single integrated circuit, simplifying the design of complex digital decision-making circuits.
Replacement Considerations
Check for SN74LS682N for through-hole alternatives. Verify compatibility with other 8-bit LS comparators if pinout differences exist. Consult manufacturer substitution guides for exact functional equivalents.
