HEF4541BT Model Information

Overview

The HEF4541BT is a programmable timer from Nexperia, designed for a wide range of applications requiring precise timing control. It features a 16-stage binary counter, an integrated oscillator, automatic power-on reset, and output control logic. This model is housed in a SOT108-1 (SO14) plastic small outline package, suitable for surface-mount applications.

Specifications

Basic Parameters

• Series: HEF4541B
• Package Type: SOT108-1 (SO14)
• Temperature Range: -40°C to +125°C
• Operating Voltage Range: 3V to 15V
• Oscillator Frequency Range: 1Hz to 100kHz
• Output Type: Timer Output

Detailed Electrical Characteristics

• Supply Voltage (VDD): 3V to 15V
• Input Voltage (VI): 0V to VDD
• Propagation Delay (tpd):5V: 375ns to 750ns10V: 150ns to 300ns15V: 110ns to 220ns
• Maximum Clock Frequency (fclk(max)):5V: 16MHz10V: 30MHz15V: 36MHz
• Oscillator Frequency (fosc):5V: 90kHz (Rt = 5kΩ, Ct = 1nF, RS = 10kΩ)10V: 90kHz (Rt = 5kΩ, Ct = 1nF, RS = 10kΩ)15V: 90kHz (Rt = 5kΩ, Ct = 1nF, RS = 10kΩ)

Pin Configuration

• Pin 1 (RTC): External resistor connection
• Pin 2 (CTC): External capacitor connection
• Pin 3 (RS): External resistor connection (RS) or external clock input
• Pin 4, 11 (n.c.): Not connected
• Pin 5 (AR): Auto reset input (active low)
• Pin 6 (MR): Master reset input
• Pin 7 (VSS): Ground (0V)
• Pin 8 (O): Timer output
• Pin 9 (PH): Phase input
• Pin 10 (MODE): Mode select input
• Pin 12, 13 (A0, A1): Address inputs
• Pin 14 (VDD): Supply voltage

Functional Description

• Single Transition Timer: When MODE input is LOW.
• Frequency Divider: When MODE input is HIGH.
• Auto Reset: Enabled when AR and MR are LOW.
• Master Reset: Resets the counter independent of all other inputs when MR is HIGH.

Frequency Selection

• A0 = LOW, A1 = LOW: 13 stages, 8192 counts
• A0 = LOW, A1 = HIGH: 10 stages, 1024 counts
• A0 = HIGH, A1 = LOW: 8 stages, 256 counts
• A0 = HIGH, A1 = HIGH: 16 stages, 65536 counts

Ordering Information

• Package: SOT108-1 (SO14)
• Temperature Range: -40°C to +125°C
• Part Number: HEF4541BT

Applications

The HEF4541BT is suitable for a wide range of applications, including:

• General-purpose timing circuits
• Oscillator circuits
• Frequency division
• Single-shot timing applications

Compliance and Standards

• ESD Protection:HBM: Exceeds 2000V (ANSI/ESDA/JEDEC JS-001 Class 2)CDM: Exceeds 1000V (ANSI/ESDA/JEDEC JS-002 Class C3)
• Complies with JEDEC Standard JESD 13-B