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Product Detailed Parameters
- Description：BINARY COUNTER
- Series：-
- Mfr：National Semiconductor
- Package：Bulk
- Logic Type：-
- Direction：-
- Number of Elements：-
- Number of Bits per Element：-
- Reset：-
- Timing：-
- Count Rate：-
- Trigger Type：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Voltage - Supply：-
- Grade：-
- Qualification：-
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Overview
The 4020BDMQB is a 14-stage binary ripple counter manufactured by National Semiconductor. It features a clock input (CP), an overriding asynchronous master reset input (MR), and 12 buffered parallel outputs (Q0, Q3 to Q13). The counter advances on the HIGH-to-LOW transition of CP. A HIGH signal on MR clears all counter stages and forces all outputs LOW, independent of the state of CP. Each counter stage utilizes a static toggle flip-flop design with inputs that include clamp diodes.
Feature Summary
- Features an overriding asynchronous master reset input that clears all counter stages and forces outputs LOW regardless of the clock state.
- Incorporates static toggle flip-flops for each counter stage to ensure stable counting operations.
- Includes clamp diodes on inputs to enable interface with voltages exceeding VCC using current limiting resistors.
Applications
- Frequency dividing circuits
- Time delay circuits
- Control counters
Procurement Notes
Verify the specific suffix 'BDMQB' against official National Semiconductor or Texas Instruments documentation to confirm package type, temperature range, and compliance status. Ensure the component matches the required 14-stage binary counter specifications before procurement.
Selection Notes
Select this component when a 14-stage binary ripple counter with buffered parallel outputs is required. Consider the asynchronous master reset functionality and the ability to interface with voltages exceeding VCC via clamp diodes for system compatibility.
Part Context
This part belongs to the 4020 series of 14-stage binary ripple counters. It is related to other variants such as the 74HC4020 and 74HCT4020, which share similar functional descriptions but may differ in supply voltage ranges, power dissipation characteristics, and logic family specifications.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided data. Verify compatibility with equivalent 14-stage binary counters from other manufacturers if substitution is necessary.
