Overview
The CD4541B, produced by Texas Instruments, is a CMOS programmable timer that integrates a 16-stage binary counter, an oscillator controlled by external R-C components, an automatic power-on reset circuit, and output control logic. This device is versatile and can operate in various modes, including as a 2^N frequency divider or as a single-transition timer. It is designed to meet the requirements of JEDEC Standard No. 13B for 'B' Series CMOS devices and operates over a wide voltage range from 3V to 15V.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Package Types | CERDIP, PDIP, SOIC, SOP, TSSOP | - |
| Pins | 14 | - |
| Operating Temperature Range (°C) | -55 to 125 | - |
| Oscillator Frequency Range | DC to 100kHz | - |
| Output Resistance | Typically 100Ω at VDD = 15V | - |
| Input Low Voltage (VIL) | 0.5V to 4.5V (at VDD = 5V), 1V to 9V (at VDD = 10V), 1.5V to 13.5V (at VDD = 15V) | - |
| Input High Voltage (VIH) | 3.5V to 5V (at VDD = 5V), 7V to 10V (at VDD = 10V), 11V to 15V (at VDD = 15V) | - |
| Output Voltage (VOH) | 4.95V (at VDD = 5V), 9.95V (at VDD = 10V), 14.95V (at VDD = 15V) | - |
| Output Voltage (VOL) | 0.05V (at VDD = 5V, 10V, 15V) | - |
| Maximum Clock Pulse Input Frequency | 1.5 MHz (at VDD = 5V), 4 MHz (at VDD = 10V), 6 MHz (at VDD = 15V) | - |
Key Features
- Low Symmetrical Output Resistance, Typically 100Ω at VDD = 15V
- Built-In Low-Power RC Oscillator with frequency range from DC to 100kHz
- External Clock (Applied to Pin 3) can be Used Instead of Oscillator
- Operates as 2^N Frequency Divider or as a Single-Transition Timer
- Q/Q Select Provides Output Logic Level Flexibility
- AUTO or MASTER RESET Disables Oscillator During Reset to Reduce Power Dissipation
- Operates With Very Slow Clock Rise and Fall Times
- Capable of Driving Six Low Power TTL Loads, Three Low-Power Schottky Loads, or Six HTL Loads Over the Rated Temperature Range
- Symmetrical Output Characteristics
- 100% Tested for Quiescent Current at 20V
- 5V, 10V, and 15V Parametric Ratings
- Meets All Requirements of JEDEC Standard No. 13B, “Standard Specifications for Description of ‘B’ Series CMOS Devices”
Applications
The CD4541B is suitable for a variety of applications requiring precise timing and frequency division. These include:
- Timing and frequency division in digital circuits
- Single-transition timers for specific pulse counting applications
- Clock generation and division in microcontroller and microprocessor systems
- Automotive and industrial control systems requiring robust and low-power timing solutions
- Consumer electronics needing flexible and accurate timing functions
Q & A
- What is the CD4541B?
The CD4541B is a CMOS programmable timer that includes a 16-stage binary counter, an oscillator controlled by external R-C components, an automatic power-on reset circuit, and output control logic.
- What are the operating voltage ranges for the CD4541B?
The CD4541B operates over a voltage range from 3V to 15V.
- What types of packages are available for the CD4541B?
The CD4541B is available in CERDIP, PDIP, SOIC, SOP, and TSSOP packages.
- What is the oscillator frequency range of the CD4541B?
The oscillator frequency range is from DC to 100kHz.
- Can an external clock be used instead of the oscillator?
- What are the output characteristics of the CD4541B?
The CD4541B has symmetrical output characteristics and can drive six low power TTL loads, three low-power Schottky loads, or six HTL loads over the rated temperature range.
- How does the AUTO or MASTER RESET function work?
The AUTO or MASTER RESET disables the oscillator during reset to reduce power dissipation.
- What are the maximum clock pulse input frequencies for different VDD values?
The maximum clock pulse input frequencies are 1.5 MHz at VDD = 5V, 4 MHz at VDD = 10V, and 6 MHz at VDD = 15V.
- Does the CD4541B meet any specific industry standards?
- What is the operating temperature range of the CD4541B?
The operating temperature range is from -55°C to 125°C.
- Is the CD4541B still in production?
No, Texas Instruments has discontinued the production of the CD4541B.
