HEF4528BT(LX)

The HEF4528 is a dual retriggerable resettable monostable multivibrator. Each multivibrator has an active-LOW input (nA), an active-HIGH input (nB), an active-LOW direct clear input (nCD), an output (nQ) and its complementary output (nQ), and two external timing component connection pins (nCEXT, which is always connected to ground, and nREXT/CEXT). An external timing capacitor (CEXT) must be connected between nCEXT and nREXT/CEXT, and an external resistor (REXT) must be connected between nREXT/CEXT and VDD. The output pulse width is determined by the external timing components CEXT and REXT. A HIGH-to-LOW transition on nA when nB is LOW, or a LOW-to-HIGH transition on nB when nA is HIGH, with nCD HIGH, produces a positive pulse (LOW-HIGH-LOW) on nQ and a negative pulse (HIGH-LOW-HIGH) on nQ. A LOW on nCD forces nQ LOW and nQ HIGH, and suppresses any further pulses until nCD returns HIGH. The recommended operating supply voltage VDD ranges from 3V to 12V, referenced to VSS (typically ground). Unused inputs must be connected to VDD, VSS, or another input.

Key features

• Wide supply voltage range, 3 V to 12 V
• Fully static operation
• 5 V and 10 V parametric ratings
• Standardized symmetrical output characteristics
• Operating temperature range: -40℃ to +125℃
• Package: SOP16