Overview
The CD40102BE is a CMOS 8-stage presettable 2-decade BCD synchronous down counter produced by Harris Corporation. This integrated circuit is designed for medium-speed operation and is widely used in various digital counting applications. The CD40102BE is configured as two cascaded 4-bit BCD counters, making it suitable for counting sequences up to 99 in BCD format.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | 16-lead dual-in-line plastic (PDIP) |
| Operating Temperature Range | -55°C to 125°C |
| Maximum Clock Frequency | 3.6 MHz (typ.) @ VDD = 10V |
| 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 |
| Supply Voltage | 5 V, 10 V, 15 V |
Key Features
- Synchronous or asynchronous preset capability
- Medium-speed operation with a maximum clock frequency of 3.6 MHz at VDD = 10V
- Cascadable for extended counting sequences
- 100% tested for quiescent current at 20 V
- Low input current: 1 µA at 18 V over full package-temperature range
- Standardized, symmetrical output characteristics
- Meets all requirements of JEDEC Tentative Standard No. 13B for B Series CMOS Devices
Applications
- Divide-by-"N" counters
- Programmable timers
- Interrupt timers
- Cycle/program counters
Q & A
- What is the CD40102BE?
The CD40102BE is a CMOS 8-stage presettable 2-decade BCD synchronous down counter.
- Who manufactures the CD40102BE?
The CD40102BE is manufactured by Harris Corporation.
- What is the package type of the CD40102BE?
The CD40102BE is available in a 16-lead dual-in-line plastic (PDIP) package.
- What is the operating temperature range of the CD40102BE?
The operating temperature range is -55°C to 125°C.
- What is the maximum clock frequency of the CD40102BE?
The maximum clock frequency is 3.6 MHz (typ.) at VDD = 10V.
- Can the CD40102BE be cascaded?
- What are the typical applications of the CD40102BE?
The CD40102BE is used in divide-by-"N" counters, programmable timers, interrupt timers, and cycle/program counters.
- What are the preset modes available for the CD40102BE?
The CD40102BE supports both synchronous and asynchronous preset modes.
- How does the CD40102BE handle counting?
The counter is decremented by one count on each positive transition of the CLOCK input, and counting is inhibited when the CARRY-IN/COUNTER ENABLE (CI/CE) input is high.
- What is the significance of the CARRY-OUT/ZERO-DEFECT (CO/ZD) output?
The CO/ZD output goes low when the count reaches zero if the CI/CE input is low and remains low for one full clock period.
