CD4541 Programmable Timer/Oscillator IC – 14-Pin DIP, CMOS Logic

Description

• Low Symmetrical Output Resistance, Typically 100 at VDD = 15V.
• Built-In Low-Power RC Oscillator.
• Oscillator Frequency Range . . . 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

The CD4541 programmable timer consists of a 16-stage binary counter, an oscillator that is controlled by external R-C components (2 resistors and a capacitor), an automatic power-on reset circuit, and output control logic.

• Type: Programmable Timer
• Frequency: 100kHz
• Voltage – Supply: 3V ~ 15V
• Operating Temperature: -55°C ~ 125°C
• Package / Case : 14-DIP (0.300″, 7.62mm)
• Supplier Device Package: 14-MDIP
• Mounting Type: Through Hole

■ Available division ratios 28, 210, 213, or 216
■ Increments on positive edge clock transitions
■ Built-in low power RC oscillator (±2% accuracy over temperature range and ±10% supply and ±3% over processing @ < 10 kHz)
■ Oscillator frequency range ≈ DC to 100 kHz
■ Oscillator may be bypassed if external clock is available (apply external clock to pin 3)
■ Automatic reset initializes all counters when power turns on
■ External master reset totally independent of automatic reset operation
■ Operates at 2n frequency divider or single transition timer
■ Q/Q select provides output logic level flexibility
■ Reset (auto or master) disables oscillator during resetting to provide no active power dissipation
■ Clock conditioning circuit permits operation with very slow clock rise and fall times
■ Wide supply voltage range—3.0V to 15V
■ High noise immunity—0.45 VDD (typ.)
■ 5V–10V–15V parameter ratings
■ Symmetrical output characteristics
■ Maximum input leakage 1 µA at 15V over full temperature range
■ High output drive (pin 8) min. one TTL load

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