SC74HC4538ADR2G

Overview

The SC74HC4538ADR2G is a dual precision monostable multivibrator manufactured by onsemi. It operates within a supply voltage range of 2 V to 6 V and features two independent retriggerable circuits per package. The device utilizes advanced silicon-gate CMOS technology, providing propagation delays typically ranging from 33 ns to 195 ns depending on conditions. It supports low-level output currents up to 5.2 mA and high-level output currents of -5.2 mA. The component is housed in an SOT-363 surface-mount package and is rated for operation between -55 °C and +125 °C.

Feature Summary

• Dual precision monostable multivibrator architecture with retriggerable functionality
• Triggering capability from both positive and negative signal transitions
• Independent reset inputs for each channel to force output states
• CMOS construction ensuring high noise immunity and low power consumption

Applications

• Pulse width generation and timing control
• Frequency division and pulse stretching
• Debouncing mechanical switches
• Timing delay circuits in digital systems

Procurement Notes

Verify the specific suffix 'R2G' against official onsemi documentation to confirm tape-and-reel packaging and RoHS compliance status. Confirm that the SC74HC4538ADR2G designation corresponds to the SOT-363 package type. Ensure compatibility with existing design specifications regarding operating temperature ranges and electrical parameters before procurement.

Selection Notes

Select this component when a compact dual-channel monostable solution is required. The SOT-363 package offers space efficiency compared to standard SOIC or TSSOP options. Verify that the 2 V to 6 V supply range aligns with the system's power rails. Consider the propagation delay characteristics relative to the application's timing requirements.

Part Context

This part belongs to the 74HC series of high-speed CMOS logic devices. It serves as a dual-channel alternative to single-channel monostable multivibrators. The device is functionally compatible with other manufacturers' 74HC4538 variants, maintaining pinout consistency across the industry standard while offering specific performance metrics defined by onsemi.

Replacement Considerations

Direct substitutes include MC74HC4538ADG (SOIC-16) and MC74HC4538ADTR2 (TSSOP-16). These alternatives share identical logical functions but differ in physical package dimensions. Verify footprint compatibility and thermal management requirements when transitioning between package types.