Overview
The CD4521BE is a CMOS 24-stage frequency divider manufactured by Texas Instruments. This integrated circuit combines an oscillator section with 24 ripple-carry binary counter stages, making it versatile for various frequency division applications. The oscillator configuration allows for the design of either RC or crystal oscillator circuits, providing flexibility in system design. The device is available in several package types, including 16-lead dual-in-line plastic packages (PDIP), small-outline packages (SOIC), and thin shrink small-outline packages (TSSOP).
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Category | Integrated Circuits (ICs) - Logic - Counters, Dividers |
| Package | 16-DIP (0.300", 7.62mm) |
| Logic Type | Divide-by-2 |
| Number of Bits per Element | 24 |
| Reset | Asynchronous |
| Count Rate | 13 MHz |
| Trigger Type | Negative Edge |
| Voltage - Supply | 3 V ~ 18 V |
| Operating Temperature | -55°C ~ 125°C |
| Mounting Type | Through Hole |
Key Features
- Reset disables the RC oscillator for low-power standby condition.
- VDD and VSS pins are brought out from the crystal oscillator to allow use of external resistors for low-power operation.
- Maximum input current of 1 µA at 18 V over full package-temperature range: 100 nA at 18 V and 25°C.
- Common reset.
- 100% tested for 20-V quiescent current.
- 5, 10, and 15 V parametric ratings.
- Standardized symmetrical output characteristics.
- Meets all requirements of JEDEC Tentative Standard No. 13B, "Standard Specifications for Description of B Series CMOS Devices".
Applications
The CD4521BE is suitable for a wide range of applications requiring frequency division, such as:
- Frequency synthesizers and generators
- Timing and clock circuits
- Counter and divider circuits in digital systems
- Low-power consumer electronics
- Industrial control systems
Q & A
- What is the primary function of the CD4521BE?
The CD4521BE is a CMOS 24-stage frequency divider, designed to divide input frequencies by powers of 2.
- What types of oscillator configurations can be used with the CD4521BE?
The CD4521BE allows for the design of either RC or crystal oscillator circuits.
- What is the operating temperature range of the CD4521BE?
The operating temperature range is -55°C to 125°C.
- What are the supply voltage ranges for the CD4521BE?
The supply voltage ranges from 3 V to 18 V.
- What is the maximum count rate of the CD4521BE?
The maximum count rate is 13 MHz.
- How does the reset function work on the CD4521BE?
A HIGH on the RESET causes the counter to go to the all-0s state and disables the oscillator.
- What are the package options available for the CD4521BE?
The device is available in 16-lead dual-in-line plastic packages (PDIP), small-outline packages (SOIC), and thin shrink small-outline packages (TSSOP).
- Is the CD4521BE RoHS compliant?
Yes, the CD4521BE is RoHS compliant.
- What is the trigger type for the counter in the CD4521BE?
The trigger type is negative edge.
- Can the CD4521BE be used in low-power applications?
Yes, the CD4521BE has features such as low input current and the ability to use external resistors for low-power operation.
