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BD48K22G-TR

CMOS voltage detector, 2.2V, +/-1%, open-drain, SSOP5

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Manufacturer Part：

BD48K22G-TR

Package：

SSOP5 (2.90 x 2.80 x 1.25 mm)

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Description

Product Overview

The BD48K22G-TR from ROHM is a standard CMOS voltage detector IC with 2.2V threshold, N-ch open-drain output, 0.9uA IQ in SSOP5.

Key Specifications

Detect Voltage VDET 2.2V
Detect Voltage Accuracy +/-1.0%
Supply Current 0.9 uA typical
Output Type N-ch open drain
Hysteresis VDET x 3-8%
Output Delay 100 us max
Package SSOP5 (2.9 x 2.8mm)
Operating Temperature -40 to +105 C

Features

  • +/-1% high-precision detection voltage
  • Ultra-low 0.9uA current consumption
  • N-channel open-drain output
  • Hysteresis prevents chattering
  • Small SSOP5 package

Applications

  • Microcontroller reset circuits
  • Battery voltage monitoring
  • Power supply monitoring
  • System power-on reset

The BD48K22G-TR from ROHM is a CMOS voltage detector IC with 2.2V detection threshold in SSOP5 package. The K22 suffix encodes the 2.2V threshold voltage. The device features +/-1% detection voltage accuracy, ultra-low 0.9uA current consumption, and N-channel open-drain output requiring an external pull-up resistor. The built-in hysteresis (3-8% of VDET) prevents output chattering near the threshold. The 100us output delay provides noise immunity against transient voltage dips.

The BD48K22G-TR operates as a precision voltage detector. (1) The input voltage (VDD) is compared against an internal bandgap reference through a resistor divider. When VDD drops below the detection voltage (2.2V), the output transistor turns off, and the open-drain output goes high (via external pull-up) to assert the reset signal. (2) The hysteresis voltage ensures that once the output has switched, VDD must rise by 3-8% above the release voltage before the output returns to its normal state. This prevents oscillation or chattering when VDD hovers near the threshold. (3) The 0.9uA current consumption allows continuous battery monitoring without significant drain. The 100us delay filters out brief voltage dips caused by transient loads, preventing false reset events.

Pin Name Function
1 VOUT Reset output (open drain)
2 VDD Power supply / sense input
3 GND Ground
4 NC No connect
5 NC No connect
  • MCU reset circuit with 2.2V threshold and +/-1% accuracy
  • Battery voltage monitoring with 0.9uA current
  • Power supply brownout detection with hysteresis
  • System power-on reset with 100us noise filter
Model Manufacturer Key Difference
BD48K33G-TR ROHM 3.3V threshold
BD49K22G-TR ROHM CMOS output version
TLS850D0TBV33 Infineon 3.3V, automotive
TPS3809K33DBVR TI 3.3V, SOT-23
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Contact Information

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Tel / WhatsApp: +86 13760382860

Service & Packaging

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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Contact Information

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Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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