CD4536BF3A

Overview

The CD4536BF3A is a CMOS programmable timer and oscillator manufactured by Texas Instruments. It features two independent timers, an astable multivibrator, and a clock generator. The device operates within a supply voltage range of 3 V to 18 V and supports a maximum frequency of 5 MHz. It is housed in a 16-lead hermetic dual-in-line ceramic package (F3A suffix). Key electrical parameters include a propagation delay of up to 8 µs, output currents of 4 mA, and a power dissipation of 500 mW. The component functions across a temperature range of -55°C to +125°C.

Feature Summary

• Integrates two independent timers with selectable modes including astable multivibrator and clock generator
• Provides flexible timing control through external resistor and capacitor networks
• Supports high-frequency operation with a maximum clock frequency of 5 MHz
• Designed for robust performance in harsh environments using hermetic ceramic packaging

Applications

• Precision timing circuits requiring stable oscillation
• Clock generation systems for digital logic applications
• Industrial control systems operating in extreme temperature conditions
• Military and aerospace electronic assemblies requiring hermetic sealing

Procurement Notes

Verify the F3A suffix confirms the specific 16-lead hermetic dual-in-line ceramic package required for your design. Ensure that environmental specifications meet the -55°C to +125°C operating range. Confirm compatibility with existing PCB footprints for ceramic DIP packages. Check for any specific handling requirements associated with hermetic components during assembly.

Selection Notes

Select this component when hermetic sealing is mandatory for reliability in radiation or moisture-sensitive environments. Choose over plastic variants if long-term stability under extreme thermal cycling is critical. Consider the 5 MHz frequency limit and 18 V maximum voltage when designing power and signal interfaces. Evaluate the need for two independent timers versus single-timer alternatives.

Part Context

The CD4536B series belongs to Texas Instruments' family of CMOS programmable timers. The BF3A variant specifically denotes the hermetic ceramic construction, distinguishing it from standard plastic packaged versions like the CD4536BE. This series is widely used in applications demanding high reliability and precise timing control without drift.

Replacement Considerations

CD4536BE offers identical electrical functionality but utilizes a plastic DIP package instead of hermetic ceramic. CD4536BPWR provides surface-mount TSSOP packaging for automated assembly. Verify pinout compatibility and thermal management requirements when substituting between package types.