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Product Detailed Parameters
- Description：SHIFT REGISTER, 8-BIT
- Series：-
- Mfr：National Semiconductor
- Package：Bulk
- Logic Type：-
- Output Type：-
- Number of Elements：-
- Number of Bits per Element：-
- Function：-
- Voltage - Supply：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The 4021BDMQB is an 8-bit static shift register manufactured by National Semiconductor, now part of Texas Instruments. It functions as a parallel-to-serial converter featuring a synchronous serial data input and a clock input. The device includes an asynchronous active HIGH parallel load input and eight asynchronous parallel data inputs. It provides buffered parallel outputs from the last three stages. The component is housed in a ceramic dual flatpack (DFP) package with 14 terminals, designed for military-grade operation within a temperature range of -55 °C to 125 °C.
Feature Summary
- Provides parallel-to-serial conversion capabilities via synchronous serial data input and clock control.
- Features an asynchronous active HIGH parallel load input for immediate data capture.
- Includes buffered parallel outputs derived from the final three internal stages.
Applications
- Military-grade digital signal processing systems
- High-reliability industrial control interfaces
- Aerospace telemetry data acquisition
Procurement Notes
Verify that the specific ordering suffix matches the required military qualification standards. Confirm the package type corresponds to the ceramic dual flatpack variant. Ensure the voltage supply parameters align with the system requirements before integration into the design.
Selection Notes
Select this component when a robust, high-speed parallel-to-serial conversion solution is required for harsh environments. Consider the ceramic packaging for superior thermal stability compared to plastic alternatives. Evaluate the buffered output capability against the driving requirements of downstream logic circuits.
Part Context
This device belongs to the AC series of logic integrated circuits produced by National Semiconductor. It serves as a specialized data handling component within broader embedded processor and controller architectures. The product line emphasizes reliability and performance for demanding operational conditions.
Replacement Considerations
Consult official documentation for verified substitute part numbers. Do not assume compatibility with other shift register families without verifying pinout and electrical specifications.
