BU7231G-TR

Comparators Overview

The BU7231G-TR is a single-channel, low-power CMOS comparator manufactured by ROHM Semiconductor. It operates on a single supply voltage ranging from 1.8V to 5.5V. The device features a push-pull output stage capable of sourcing and sinking typical currents of 6mA at 3V. Key electrical characteristics include a maximum input offset voltage of 11mV at 3V, a typical input bias current of 0.001nA (1pA), and a propagation delay of 1.7µs. It offers high voltage gain (90dB) and power supply rejection ratio (80dB). The component is housed in a compact 5-pin SSOP package with dimensions of 2.9x2.8mm.

Comparators Feature Summary

• Operates within a wide low-voltage range of 1.8V to 5.5V on a single supply.
• Features an input full-swing capability allowing signal ranges from VSS to VDD.
• Utilizes a push-pull output structure for direct interfacing with digital logic.
• Designed for ultra-low power consumption with minimal input bias current.

Comparators Applications

• Battery-powered portable electronic devices requiring low quiescent current.
• Threshold detection circuits in microcontroller-based systems.
• Low-voltage signal conditioning and level shifting applications.

Comparators Procurement Notes

Verify the specific suffix 'TR' indicates tape-and-reel packaging when ordering. Confirm that the SSOP-5 package matches the target PCB footprint. Ensure the operating temperature range of -40°C to +85°C aligns with the system environment. Check for RoHS compliance status if required by local regulations. Validate that the single-supply operation fits the available power rails.

Comparators Selection Notes

Select this component when a single comparator with push-pull output is needed for low-voltage applications. It is suitable for designs prioritizing low static current over high-speed performance. Consider the 1.7µs propagation delay against system timing requirements. The 11mV max offset voltage provides adequate precision for general-purpose threshold detection. Ensure the 6mA output drive is sufficient for the connected load impedance.

Comparators Part Context

This part belongs to the BU72xx series of low-voltage CMOS comparators from ROHM. The series includes variants like the BU7230G (open-drain output) and dual-channel versions such as the BU7232G. The BU7231G-TR specifically denotes the single-channel version with push-pull output in a taping configuration. It is designed for standard commercial applications and is not recommended for automotive use.

Comparators Replacement Considerations

The BU7230G-TR is a functional alternative within the same family but features an open-drain output instead of push-pull. Designers must verify if the application requires the pull-up resistor inherent in open-drain configurations or the direct drive of push-pull outputs. Other pin-compatible comparators should be evaluated for matching voltage ranges and output drive capabilities.