BU45L332G-TL

Overview

The BU45L332G-TL is a fixed-delay voltage detector IC from ROHM Semiconductor, designed for monitoring power supply voltages. It features a typical under-voltage detection threshold of 3.2V with ±1% precision. The device provides an open-drain output and includes a built-in fixed reset delay timer of 200ms, eliminating the need for external capacitors. It operates within a supply voltage range of 0.6V to 6V and consumes low circuit current, typically 2.3μA in active mode and 2.8μA in standby. The component supports a hysteresis voltage of Vdet x 0.05 and functions across a temperature range of -40°C to +105°C.

Feature Summary

• Built-in fixed delay timer eliminates the requirement for external timing capacitors
• High accuracy voltage detection with ±1% precision tolerance
• Low power consumption suitable for battery-operated applications
• Open-drain output configuration for flexible interfacing

Applications

• Microprocessor system reset circuits
• Battery-powered device power management
• Portable electronic equipment supervision
• General-purpose voltage monitoring in embedded systems

Procurement Notes

Verify the obsolete status before procurement as the BU45L332G-TL is marked as discontinued or not recommended for new designs. Confirm availability through authorized distributors for existing inventory. Ensure replacement components like the BD5232G-1 are evaluated for compatibility regarding package dimensions and electrical specifications prior to integration into new production runs.

Selection Notes

Select this component when a fixed 200ms delay is required without external timing components. The open-drain output suits applications needing pull-up resistors or level shifting. Consider the BU46L332G-TL if CMOS push-pull output is preferred over open-drain. Verify that the 3.2V detection threshold aligns with the target system's minimum operating voltage requirements.

Part Context

This part belongs to the BU45/BU46 series of highly accurate, low-current voltage detectors. The 'L' suffix indicates low current consumption, while '33' denotes the 3.3V class detection voltage. The '2' signifies the 200ms fixed delay time. The 'TL' suffix typically refers to the tape and reel packaging format. These ICs are designed for compact SSOP-3 packages to save board space.

Replacement Considerations

The BD5232G-1 is listed as a similar specification replacement. Note that the BD5232G-1 offers adjustable delay times compared to the fixed 200ms delay of the BU45L332G-TL. Verify pinout compatibility and output type differences (open-drain vs. open-drain) when substituting.