TC4538BP(N,F)

Overview

The TC4538BP(N,F) is a dual precision retriggerable and resettable monostable multivibrator manufactured by Toshiba Semiconductor. It operates within a DC supply voltage range of 3 V to 18 V and supports an operating temperature range from -40 °C to 85 °C. The device features two independent circuits, each with inputs A and B for leading or trailing edge triggering, and a control input CD for resetting. Output pulse width is determined by external resistor RX and capacitor CX time constants. Available in DIP16 and SOP16 packages.

Feature Summary

• Supports retriggerable and resettable monostable operation via dedicated control inputs
• Allows trigger selection at either the leading or trailing edge using inputs A and B
• Provides complementary outputs (Q and Q-bar) for flexible logic interfacing
• Enables broad output pulse width adjustment through external RC components

Applications

• Timing generation and pulse stretching circuits
• Debouncing switches and mechanical contacts
• Pulse width modulation signal conditioning
• Delay line applications requiring precise timing intervals

Procurement Notes

Verify package suffix compatibility: 'N' indicates DIP16-P-300-2.54A, while 'F' indicates SOP16-P-300-1.27A. Confirm RoHS compliance status with the supplier as environmental declarations may vary by production batch. Ensure design adheres to absolute maximum ratings, particularly regarding power dissipation limits which differ between plastic DIP and SOIC packages.

Selection Notes

Select this component when dual precision monostable functionality is required within standard CMOS logic families. Consider the TC4538BP for through-hole mounting needs due to the DIP16 option, or choose the TC4538BF for surface-mount assembly requirements. Evaluate external RC component tolerances as they directly impact pulse width accuracy, noting the typical ±5% deviation under specified test conditions.

Part Context

This part belongs to the 4000/14000/40000 series of CMOS digital integrated circuits. It serves as a silicon monolithic solution for timing applications where retriggerability and reset capabilities are essential. The device complements other logic family members by offering dual-channel precision timing without requiring complex external gating networks.

Replacement Considerations

Compatible substitutes include MC14538B and HD14538B. Verify pinout alignment and electrical characteristics such as propagation delay and supply voltage ranges before substitution. Ensure that alternative manufacturers meet the same operating temperature specifications and package dimensions if physical interchangeability is required.