BD5257G-TR

Overview

The BD5257G-TR is a high-precision, low current consumption voltage detector IC from the BD52xx series by ROHM Semiconductor. It features an N-channel open drain output and supports specific detection voltages ranging from 2.3V to 6.0V in 0.1V increments. The device includes a capacitor-controlled time delay function for reset timing adjustment. Key electrical parameters include a typical under-voltage detection voltage of 5.7V with ±1% precision. The reset active voltage range spans 0.95V to 10V. Circuit current is typically 0.85μA at VDET=4.8V. Hysteresis voltage is defined as VDET multiplied by 0.05. The component operates within a temperature range of -40°C to +105°C and is housed in a compact SSOP5 package measuring 2.9x2.8mm with a thickness of 1.25mm.

Feature Summary

• Capacitor-controlled adjustable reset delay timer for precise timing control
• High accuracy voltage detection with specified hysteresis characteristics
• Low power consumption suitable for battery-operated applications
• N-channel open drain output compatible with various logic levels

Applications

• Processor supervisor circuits requiring voltage monitoring
• Battery backup systems with voltage threshold detection
• Embedded systems needing reliable reset signal generation
• Portable electronic devices utilizing low-power supervision

Procurement Notes

Verify the exact ordering suffix and package variant when sourcing, as availability may vary by region. Confirm RoHS compliance status and check for any end-of-life notifications or last-time-buy recommendations associated with this specific part number before finalizing procurement plans. Ensure compatibility with existing design constraints regarding supply chain stability.

Selection Notes

Select this component when a fixed 5.7V detection threshold with adjustable delay is required. Consider the SSOP5 package size for space-constrained designs. Evaluate the low current consumption against system power budgets. Compare performance metrics such as precision and operating temperature range against alternative supervisory circuits to ensure suitability for the target application environment.

Part Context

The BD5257G-TR belongs to the BD52xx series of voltage detectors, designed for monitoring power supply voltages in digital systems. This series emphasizes high accuracy and low current draw, making it suitable for portable electronics. The specific model provides a 5.7V detection point, fitting within the broader range of available thresholds offered by the manufacturer for various standard voltage rails.

Replacement Considerations

BD5250G-1 is listed as a recommended replacement with the same pinout and package, though it features a different detection voltage (5.0V). Verify that the change in threshold voltage does not impact system functionality before substituting.