Overview
The CD4541BF is a CMOS programmable timer produced by Harris Corporation. This component is designed to provide flexible timing functions and is part of the high-voltage types with a 20V rating. It features a 16-stage binary counter, an RC oscillator controlled by external R-C components, an automatic power-on reset circuit, and output control logic. The timer can operate as a 2^N frequency divider or as a single-transition timer, making it versatile for various applications.
Key Specifications
| Attribute | Value |
|---|---|
| Manufacturer | Harris Corporation |
| Type | Programmable Timer |
| Supplier Device Package | 14-CDIP |
| Package / Case | 14-CDIP (0.300", 7.62mm) |
| Operating Temperature | -55°C ~ 125°C (TA) |
| Mounting Type | Through Hole |
| Voltage - Supply | 3V ~ 18V |
| Frequency | DC to 100kHz |
| Current - Supply | 100 µA |
| Count | 65536 |
| RoHS Status | RoHS non-compliant |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) |
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 (Applied to Pin 3) 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 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
Applications
The CD4541BF is suitable for a variety of timing and counting applications in electronic circuits. It can be used in systems requiring precise timing, such as in industrial control systems, medical devices, automotive electronics, and consumer electronics. Its ability to operate as a frequency divider or single-transition timer makes it versatile for different design needs.
Q & A
- What is the operating temperature range of the CD4541BF?
The operating temperature range is -55°C to 125°C. - What is the supply voltage range for the CD4541BF?
The supply voltage range is 3V to 18V. - Can the CD4541BF be used with an external clock?
Yes, an external clock can be applied to Pin 3 instead of using the built-in oscillator. - What is the maximum frequency of the RC oscillator?
The maximum frequency of the RC oscillator is 100kHz. - How many stages does the binary counter have?
The binary counter has 16 stages. - What is the purpose of the AUTO RESET input?
The AUTO RESET input initializes timing by setting it to logic '0' and turning power on. If set to logic '1', the AUTO RESET circuit is disabled. - Can the CD4541BF drive TTL loads?
Yes, it can drive six low power TTL loads over the rated temperature range. - Is the CD4541BF RoHS compliant?
No, the CD4541BF is RoHS non-compliant. - What is the moisture sensitivity level (MSL) of the CD4541BF?
The moisture sensitivity level is 3 (168 Hours). - What is the typical output resistance of the CD4541BF?
The typical output resistance is 100Ω at VDD = 15V.
