CD4538BM(LX)

The CD4538 is a dual retriggerable-resettable monostable multivibrator. Each multivibrator has an active direct reset input (nCD), an output (nQ) and its complement (nQ(overline)), and two pins (nREXT/CEXT, and nCEXT, always connected to ground) for connecting the external timing components CEXT and REXT. Typical pulse width variation over the specified temperature range is ±0.2%. The multivibrator may be triggered by either the positive or the negative edges of the input pulse and will produce an accurate output pulse with a pulse width range of 10us to infinity. The duration and accuracy of the output pulse are determined by the external timing components CEXT and REXT. The output pulse width (tW) is equal to REXT × CEXT. The linear design techniques in LOCMOS (Local Oxide CMOS) guarantee precise control of the output pulse width. A LOW level at nCD terminates the output pulse immediately. It operates over a recommended VDD power supply range of 3V to 12V referenced to VSS (usually ground). Unused inputs must be connected to VDD, VSS, or another input.

Applications

• Timing circuits
• Pulse generators
• Signal processing
• Electronic control systems

Key features

• Wide supply voltage range from 3V to 12V
• Tolerant of slow trigger rise and fall times
• Fully static operation
• 5V and 10V parametric ratings
• Standardized symmetrical output characteristics
• Specified from -40°C to +125°C
• Packaging information: DIP16/SOP16/TSSOP16