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ROHM Semiconductor BU4921G-TR — Memory (DRAM / SRAM / Flash / EEPROM)
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RoHS Compliant · Lead-Free EIA-481 Standard
ROHM Semiconductor / Memory (DRAM / SRAM / Flash / EEPROM)

BU4921G-TR Simple Reset/Power-On Reset, 2.1V Threshold

MPN BU4921G-TR
End of Life Spot Stock · 24-48h Dispatch 100% Original Sealed

ROHM BU4921G-TR Simple Reset/Power-On Reset, Active High, Push-Pull Output, 2.1V Threshold, SC-74A SOT-753, -40°C to 125°C, Tape & Reel.

In Stock: 2,970 pcs
MOQ: 1 pcs
Logistics: DHL / FedEx DAP (Global Express · 3-7d) Russia & CIS DDP (Door-to-Door Cleared)
Dispatch: Shenzhen / HK
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100% Original Sealed 45x Microscope QC 30-Day Warranty · COC USD T/T & PI · DAP/DDP
[SPEC] Essential Parameters Snapshot Full Specifications (9)
Package / Case SC-74A, SOT-753

Full Technical Specifications

9 Parameters
BU4921G-TR specifications
Parameter / AttributeSpecification / Value
TypeSimple Reset/Power-On Reset
MountingSurface Mount
Voltage - threshold2.1V
Number of voltages monitored1
Operating temperature-40°C ~ 125°C (TA)
ResetActive High
OutputPush-Pull, Totem Pole
PackageTape & Reel (TR); Cut Tape (CT)
CaseSC-74A, SOT-753
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[02] Industrial Packaging Tape & Reel / Tray / Tube

Standard factory-sealed packaging compliant with EIA-481 standards for automated high-speed SMT pick-and-place lines.

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Technical Details & Description

What the 2.1V threshold and active-high reset mean for your power rail

The active-high push-pull output means the reset pin goes high when the monitored voltage is below threshold — useful for directly enabling a regulator or driving a logic input without an external pull-up. The output is push-pull, so it drives both high and low actively, eliminating the need for a pull-up resistor and saving a component on the BOM.

The wide range also covers cold-crank and hot-soak conditions in automotive modules.

Package and footprint for space-constrained boards

The 5-pin SSOP footprint is common and easy to route, making it a drop-in for many existing voltage-detector layouts.

Frequently asked questions

Does BU4921G-TR have a push-pull output?

Yes, the BU4921G-TR has a push-pull, totem-pole output that drives both high and low actively, eliminating the need for an external pull-up resistor.

What is the difference between BU4921G-TR and BU4921F-TR?

The evidence does not specify the difference between BU4921G-TR and BU4921F-TR. The 'G' and 'F' suffixes typically indicate package variants, but confirm the exact package code before ordering.

BU4921G-TR
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