Overview
The CD4541BNSR is a CMOS programmable timer produced by Texas Instruments. It is part of the CD4541B series, known for its high voltage rating of up to 20V and wide operating temperature range of -55°C to 125°C. This component is designed for various timing and counting applications, featuring a 16-stage binary counter, an external RC-controlled oscillator, and automatic power-on reset circuitry. The timer is available in several package types, including the 14-lead SOP (Small Outline Package) for the CD4541BNSR variant.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Series | CD4541B |
| Part Number | CD4541BNSR |
| Package Type | SOP (Small Outline Package) |
| Pins | 14 |
| Operating Temperature Range | -55°C to 125°C |
| VCC (Min/Max) | 3V / 18V |
| Oscillator Frequency Range | DC to 100kHz |
| Output Drive (IOL/IOH) (Max) | 4/-4 mA |
| Quiescent Current (ICC) at Nom Voltage (Max) | 0.3 mA |
| Output Voltage (Low-Level/High-Level) (Max/Min) | 0.05V / 4.95V (at 5V VCC), 0.05V / 9.95V (at 10V VCC), 0.05V / 14.95V (at 15V VCC) |
Key Features
- Built-in low-power RC oscillator controlled by external R-C components (2 resistors and a capacitor)
- Operates with very slow clock rise and fall times
- 100% Tested for quiescent current at 20V
- Symmetrical output characteristics
- AUTO or MASTER RESET disables oscillator during reset to reduce power dissipation
- Capable of driving six low power TTL loads, three low-power Schottky loads, or six HTL loads over the rated temperature range
- Output logic level flexibility via Q/Q select
Applications
The CD4541BNSR is suitable for a variety of applications requiring precise timing and counting, such as:
- Timing circuits in industrial control systems
- Frequency dividers and single-transition timers
- Automotive and aerospace systems due to its wide operating temperature range
- Consumer electronics requiring low power consumption and high reliability
Q & A
- What is the operating temperature range of the CD4541BNSR?
The operating temperature range is -55°C to 125°C. - What is the maximum voltage rating for the CD4541BNSR?
The maximum voltage rating is 20V. - What types of packages are available for the CD4541B series?
The CD4541B series is available in PDIP, SOP, SOIC, and TSSOP packages. - How is the oscillator frequency controlled in the CD4541BNSR?
The oscillator frequency is controlled by external R-C components (2 resistors and a capacitor). - Can the CD4541BNSR operate with slow clock rise and fall times?
Yes, it can operate with very slow clock rise and fall times. - What is the quiescent current of the CD4541BNSR at 20V?
The quiescent current is 0.3 mA at 20V. - How many low power TTL loads can the CD4541BNSR drive?
It can drive six low power TTL loads. - What is the purpose of the AUTO or MASTER RESET in the CD4541BNSR?
The AUTO or MASTER RESET disables the oscillator during reset to reduce power dissipation. - Is the CD4541BNSR RoHS compliant?
Yes, the CD4541BNSR is RoHS compliant. - What is the output logic level flexibility in the CD4541BNSR?
The output logic level flexibility is provided via Q/Q select.
