Overview
The CD4541BPW is a programmable timer IC produced by Texas Instruments. It is part of the CD4541B series and is packaged in a 14-pin TSSOP (Thin Shrink Small Outline Package). This device integrates a 16-stage binary counter, an oscillator controlled by external R-C components, an automatic power-on reset circuit, and output control logic. The counter increments on positive-edge clock transitions and can be reset via the MASTER RESET input. The CD4541BPW is designed to operate in a wide range of applications requiring precise timing and counting functions.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Package Type | 14-TSSOP | |
| Operating Temperature Range | -55 to 125 | °C |
| Supply Voltage Range | 3 to 20 | V |
| Oscillator Frequency Range | DC to 100kHz | |
| Maximum Clock Pulse Input Frequency | 1.5 MHz (at 5V), 4 MHz (at 10V), 6 MHz (at 15V) | |
| Output Low Voltage (VOL) | 0.05 V (max) at VDD = 5V, 10V, 15V | V |
| Output High Voltage (VOH) | 4.95 V (min) at VDD = 5V, 9.95 V (min) at VDD = 10V, 14.95 V (min) at VDD = 15V | V |
| Input Low Voltage (VIL) | 1.5 V (max) at VDD = 5V, 3 V (max) at VDD = 10V, 4 V (max) at VDD = 15V | V |
| Input High Voltage (VIH) | 3.5 V (min) at VDD = 5V, 7 V (min) at VDD = 10V, 11 V (min) at VDD = 15V | V |
Key Features
- Low Symmetrical Output Resistance, typically 100Ω at VDD = 15V
- Built-In Low-Power RC Oscillator with a frequency range from DC to 100kHz
- External Clock can be used instead of the oscillator
- Operates as a 2^N Frequency Divider or as a Single-Transition Timer
- Q/Q Select provides output logic level flexibility
- AUTO or MASTER RESET disables the 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
- Meets all requirements of JEDEC Standard No. 13B, “Standard Specifications for Description of ‘B’ Series CMOS Devices”
Applications
The CD4541BPW is suitable for a variety of applications requiring precise timing and counting functions. These include:
- Digital timing circuits
- Frequency dividers
- Single-transition timers
- Automotive and industrial control systems
- Consumer electronics requiring accurate timing functions
Q & A
- What is the operating temperature range of the CD4541BPW?
The operating temperature range is -55°C to 125°C.
- What is the supply voltage range for the CD4541BPW?
The supply voltage range is 3V to 20V.
- Can the CD4541BPW use an external clock instead of the internal oscillator?
- What are the output options for the CD4541BPW?
The output can be selected from the 8th, 10th, 13th, or 16th counter stage using time-select inputs A and B.
- How does the AUTO RESET function work?
The AUTO RESET function initializes timing by setting the AUTO RESET input (pin 5) to logic “0” and turning power on. If pin 5 is set to logic “1”, the AUTO RESET circuit is disabled.
- What is the maximum clock pulse input frequency for the CD4541BPW?
The maximum clock pulse input frequency is 1.5 MHz at 5V, 4 MHz at 10V, and 6 MHz at 15V.
- Can the CD4541BPW drive multiple loads?
- Does the CD4541BPW meet any specific industry standards?
- What is the typical output resistance of the CD4541BPW?
The typical output resistance is 100Ω at VDD = 15V.
- Is the CD4541BPW RoHS compliant?
