Overview
The CD4520BPW is a CMOS Dual Binary Up-Counter produced by Texas Instruments. This component is part of the CD4520B series, which consists of two identical, internally synchronous 4-stage counters. Each counter stage is a D-type flip-flop with interchangeable CLOCK and ENABLE lines, allowing for incrementing on either the positive-going or negative-going transition of the clock signal. Although the CD4520BPW is currently obsolete and no longer in production, it remains relevant for existing designs and maintenance of older systems.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | TSSOP (PW) |
| Pins | 16 |
| Operating Temperature Range (°C) | -55 to 125 |
| Typical Clock Frequency at 10 V | 6 MHz |
| Edge Triggering | Positive- or negative-edge triggering |
| Internal Carry Propagation | Synchronous internal carry propagation |
| Quiescent Current Test | 100% tested for quiescent current at 20 V |
| Maximum Input Current | 1 µA at 18 V over full package-temperature range; 100 nA at 18 V and 25°C |
| Noise Margin | 1 V at VDD= 5 V, 2 V at VDD= 10 V, 2.5 V at VDD= 15 V |
Key Features
- Medium-speed operation with a typical clock frequency of 6 MHz at 10 V.
- Positive- or negative-edge triggering for flexibility in design.
- Synchronous internal carry propagation for accurate counting.
- Low input current: 1 µA at 18 V over the full package-temperature range and 100 nA at 18 V and 25°C.
- High noise margin: 1 V at VDD= 5 V, 2 V at VDD= 10 V, and 2.5 V at VDD= 15 V.
- Standardized, symmetrical output characteristics.
- Meets all requirements of JEDEC Tentative Standard No. 13B for B Series CMOS Devices.
Applications
- Multistage synchronous counting.
- Multistage ripple counting.
- Frequency dividers.
Q & A
- What is the CD4520BPW?
The CD4520BPW is a CMOS Dual Binary Up-Counter from Texas Instruments, part of the CD4520B series.
- What is the typical clock frequency of the CD4520BPW?
The typical clock frequency is 6 MHz at 10 V.
- Can the CD4520BPW be triggered on both positive and negative edges?
- What is the operating temperature range of the CD4520BPW?
The operating temperature range is -55°C to 125°C.
- What is the maximum input current of the CD4520BPW?
The maximum input current is 1 µA at 18 V over the full package-temperature range and 100 nA at 18 V and 25°C.
- Is the CD4520BPW still in production?
No, the CD4520BPW is obsolete and no longer in production.
- What are the common applications of the CD4520BPW?
Common applications include multistage synchronous counting, multistage ripple counting, and frequency dividers.
- What type of packages is the CD4520B available in?
The CD4520B is available in various packages including PDIP, CDIP, SOIC, SOP, and TSSOP.
- Does the CD4520BPW meet any specific industry standards?
- How can the counters be cascaded?
The counters can be cascaded in the ripple mode by connecting Q4 to the enable input of the subsequent counter while the CLOCK input of the latter is held low.
