BU45L234G-TL

Overview

The BU45L234G-TL is a fixed delay type voltage detector IC from ROHM Semiconductor, designed for monitoring single-input power supply voltages. It features a threshold voltage of 2.3 V with an accuracy of ±1%. The device provides an open-drain output and includes a built-in reset delay timer of 400 ms, eliminating the need for external capacitors. Operating within a supply voltage range of 0.6 V to 6 V, it consumes a typical operating current of 2.8 µA. Packaged in an SSOP-3 format, it supports temperatures from -40°C to +105°C.

Feature Summary

• Built-in counter timer delay circuit removes requirement for external delay-setting capacitors
• High detection accuracy maintained at ±1% across the operational temperature range
• Low current consumption design suitable for battery-powered applications
• Fixed reset delay time ensures stable system initialization without component variation

Applications

• Microprocessor reset circuits requiring fixed timing delays
• Battery-operated portable devices needing low standby current
• Embedded systems monitoring single voltage rails for under-voltage conditions
• Industrial control units operating in extended temperature environments

Procurement Notes

Verify component authenticity through authorized distributors due to NRND status. Confirm package orientation as the GND pin is rotated compared to standard configurations. Check RoHS compliance documentation for specific manufacturing dates. Ensure storage conditions account for moisture sensitivity levels before reflow soldering processes.

Selection Notes

Select this component when a fixed 400 ms delay is required without external components. Compare against BU46 series if CMOS output is preferred over open-drain. Consider BD5223G-1TR as a recommended replacement for new designs, noting package and current differences. Verify input voltage range compatibility with the 0.6 V minimum operation limit.

Part Context

Part of the BU45/BU46 series of highly accurate voltage detectors. Designed for general-purpose supervision in consumer and industrial electronics. Manufactured by ROHM Semiconductor using specialized CMOS technology for low power efficiency.

Replacement Considerations

BD5223G-1TR is listed as a similar specification replacement. Note that BD5223G-1TR uses an SSOP-5 package instead of SSOP-3 and offers adjustable delay times rather than fixed delay.