BU4221G-TR The ROHM Semiconductor BU4221G-TR is a voltage detector IC featuring a 2.1V operating voltage and active low reset. It is supplied in a surface mount 5-SSOP package.
Mfr Part #:

BU4221G-TR

Available from 1 distributors
Mfr Name: ROHM Semiconductor
ROHM Semiconductor
The ROHM Semiconductor BU4221G-TR is a voltage detector IC featuring a 2.1V operating voltage and active low reset. It is supplied in a surface mount 5-SSOP package.
✓ Total Stock: 3,000 pcs
$ Price Range: $0.75

BU4221G-TR Available from 1 distributor

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Non-Authorised Inventory information
3,000 pcs
3000 pcs On Request 1 On Request On Request 11+ On Request On Request

BU4221G-TR Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Mounting Type
Number of Voltages Monitored
Operating Temperature
Output
Reset
Reset Timeout
Supplier Device Package
Supplier Package
Type
Voltage

BU4221G-TR Description

Short technical summary and product information.

The BU4221G-TR from ROHM Semiconductor is a single-channel voltage detector IC designed for simple reset and power-on reset applications. It operates at 2.1V and features an active low reset output, which can be configured as open drain or open collector. The reset timeout is adjustable or selectable, providing flexibility in system design.

 

This supervisor IC is suitable for monitoring a single voltage level and is housed in a compact 5-SSOP package (SC-74A, SOT-753) designed for surface mounting. The operating temperature range is from -40°C to 125°C, making it suitable for a wide variety of environmental conditions. Its primary function is to ensure system stability by providing a reset signal during power-up or voltage fluctuations.

 

The BU4221G-TR is RoHS3 compliant and has an MSL 1 rating, indicating its suitability for standard electronic manufacturing processes. Its simple reset functionality and reliable performance make it a valuable component in embedded systems requiring stable power management.

BU4221G-TR Quick Information

Product Type: Voltage Detector IC
Series: BU42xxG
Canonical Name: BU4221G-TR Voltage Detector IC
Subcategory: Supervisor IC

BU4221G-TR Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

BU4221G-TR Estimated Pricing

Qty Low High
1+ $0.75 $0.75

Estimated market price range - modelled values for guidance only, not live distributor offers.

BU4221G-TR Features

  • Single channel voltage detector.
  • 2.1V detection voltage.
  • Active low reset output.
  • Adjustable reset timeout.
  • Surface mount 5-SSOP package.

BU4221G-TR Applications

  • Power-on reset for microcontrollers and DSPs.
  • Brown-out detection in battery-powered devices.
  • System initialization in industrial control modules.
  • Voltage monitoring in automotive electronics.
  • Reset generation in portable consumer gadgets.

BU4221G-TR FAQs

7 frequently asked questions generated from this part’s specifications.
What is the threshold voltage of the BU4221G-TR?

2.1V.

What is the package type of the BU4221G-TR?

SC-74A, SOT-753 (5-SSOP).

What is the operating temperature range of the BU4221G-TR?

-40°C to 125°C.

What is the reset type of the BU4221G-TR?

Active Low.

What is the output type of the BU4221G-TR?

Open Drain or Open Collector.

Is the reset timeout adjustable?

Yes, it is adjustable/selectable.

How many voltages does the BU4221G-TR monitor?

1.

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