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Product Detailed Parameters
- Description：D LATCH, 1-FUNC, 8-BIT, TTL
- Series：*
- Mfr：Texas Instruments
- Package：Bulk
- Logic Type：-
- Circuit：-
- Output Type：-
- Voltage - Supply：-
- Independent Circuits：-
- Delay Time - Propagation：-
- Current - Output High, Low：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The SN74AS533FN is an octal transparent latch from the Texas Instruments AS logic series. It features eight D-type inputs and three-state outputs housed in a 28-pin PLCC package. The device operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical parameters include a propagation delay of 10 ns, a low-level output current of 48 mA, and a high-level output current of -24 mA. It functions as an inverting latch with a maximum operating temperature of 70°C.
Feature Summary
- Provides eight-bit data storage with transparent latch functionality for direct input-to-output transmission when enabled.
- Features three-state outputs allowing direct connection to bus structures without external buffer circuits.
- Utilizes advanced Schottky (AS) bipolar technology to achieve ultra-high-speed switching performance.
Applications
- High-speed parallel data buffering in computing systems
- Registering data on bidirectional microprocessor buses
- Temporary storage in digital signal processing architectures
Procurement Notes
Verify the specific suffix 'FN' corresponds to the 28-pin Plastic Leaded Chip Carrier (PLCC) package configuration. Confirm that the component meets the required RoHS compliance status for your manufacturing process. Ensure the ordering information matches the exact Texas Instruments part number to avoid pinout mismatches associated with other logic families.
Selection Notes
Select this component when system requirements demand high-speed data latching with significant drive capability. The AS series offers superior speed compared to standard or ALS variants. Verify that the 48 mA output current meets the load requirements of the destination circuitry. Ensure the 28-pin PLCC footprint is compatible with the target PCB layout.
Part Context
This component belongs to the Texas Instruments 74AS logic family, which utilizes Advanced Schottky technology. This family is designed for applications requiring faster switching speeds than standard TTL logic while maintaining compatibility with existing logic interfaces. The SN74ALS533 serves as the lower-power alternative within the same functional category.
Replacement Considerations
The SN74ALS533FN is a functionally equivalent lower-power alternative within the same package. Cross-referencing with other manufacturers requires verifying pin compatibility and ensuring the replacement supports the required 48 mA output drive strength and 10 ns propagation delay specifications.
