1. General description

The HEF4047B-Q100 is a retriggerable astable multivibrator that can be configured as either

a positive-edge or negative-edge triggered monostable multivibrator. The output pulse width is

programmed by selection of external components (Rt and Ct). Inputs include clamp diodes. This

enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.

This product has been qualified to the Automotive Electronics Council (AEC) standard Q100

(Grade 3) and is suitable for use in automotive applications.

2. Features and benefits

General

• Automotive product qualification in accordance with AEC-Q100 (Grade 3)

• Specified from -40 °C to +85 °C

• Monostable (one-shot) or astable (free-running) operation

• True and complemented buffered outputs

• Only one external resistor and capacitor required

• ESD protection:

• HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V

• CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V

Monostable multivibrator

• Positive- or negative-edge triggering

• Output pulse width independent of trigger pulse duration

• Retriggerable option for pulse-width expansion

• Long pulse width possible using small RC components with external counter provision

• Fast recovery time independent of pulse width

• Pulse-width accuracy maintained at duty cycles approaching 100%

Astable multivibrator

• Free-running or gatable operating modes

• 50% duty cycle

• Oscillator output available