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HomeProductsIntegrated Circuits (ICs)PMIC - SupervisorsBD48K55G-TL
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BD48K55G-TL - Rohm Semiconductor

Manufacturer Part Number
BD48K55G-TL
Manufacturer
LAPIS Technology
Allelco Part Number
98D-BD48K55G-TL
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
48,879 pcs available, New & Original
Parts Description
IC SUPERVISOR 1 CHANNEL 3SSOP
Package
3-SSOP
Data sheet
BD48K55G-TL.pdf

HTML Datasheet

SSOP3 Taping Spec.pdf

PCN Obsolescence/ EOL

DK OBS NOTICE.pdf

Other Related Documents

BD48K55G-TL Flammability.pdf
RoHs Status
ROHS3 Compliant
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Our certification
In stock: 48879
  • Unit Price: $0.124
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $0.124 $0.12
200+ $0.049 $9.80
500+ $0.048 $24.00
1000+ $0.047 $47.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

BD48K55G-TL Tech Specifications
Rohm Semiconductor - BD48K55G-TL technical specifications, attributes, parameters and parts with similar specifications to Rohm Semiconductor - BD48K55G-TL

Product Attribute Attribute Value
Manufacturer LAPIS Technology
Voltage - Threshold 5.5V
Type Voltage Detector
Supplier Device Package 3-SSOP
Series BD48Kxx
Reset Timeout -
Reset Active Low
Product Attribute Attribute Value
Package / Case TO-236-3, SC-59, SOT-23-3
Package Tape & Reel (TR)
Output Open Drain or Open Collector
Operating Temperature -40°C ~ 105°C (TA)
Number of Voltages Monitored 1
Mounting Type Surface Mount
Base Product Number BD48K55

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 3 (168 Hours)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Frequently Asked Questions(FAQ)

What is the primary function of the BD48K55G-TL supervisor IC, and how does its voltage threshold compare to other devices in the BD48Kxx series?
The BD48K55G-TL is a single-channel voltage detector designed to monitor power rails and generate a reset signal when input voltage drops below a specified threshold. With a precise threshold of 5.5V, it provides reliable brownout protection for systems operating near this boundary. Compared to other members of the BD48Kxx family, such as the BD48L55G-TL which typically features a slightly lower threshold (e.g., 5.3V), the K-series offers a more conservative trip point suitable for applications requiring tighter margin control around nominal supply levels.
How should the open-drain output of the BD48K55G-TL be interfaced with a microcontroller’s reset pin, and what pull-up resistor value would ensure proper operation across temperature extremes?
Since the BD48K55G-TL provides an active-low open-drain output, an external pull-up resistor must connect between the reset line and VCC to maintain high logic state during normal operation. For robust performance over -40°C to 105°C, a 4.7kΩ resistor is commonly used, balancing drive strength against power consumption and noise immunity. This configuration ensures that any internal discharge transistor within the IC can sink sufficient current to pull the line low when the monitored voltage falls below 5.5V, even under worst-case leakage conditions at elevated temperatures.
Can the BD48K55G-TL be used in redundant power monitoring systems, and what design considerations apply when combining multiple BD48Kxx variants?
While the BD48K55G-TL supports only one voltage channel, it can still contribute to redundancy by being paired with another BD48Kxx device—such as the BD48L55G-TL—to monitor different rails or provide dual-threshold detection. However, care must be taken to avoid conflicting outputs; using devices with mismatched thresholds or enabling them on separate rails may lead to unintended resets. Synchronization via shared enable pins or staggered power-up sequencing helps prevent race conditions during startup transients.
Why might someone choose the 3-SSOP package over surface-mount alternatives like SOT-23-3 for mounting the BD48K55G-TL in a high-density PCB layout?
Although the BD48K55G-TL is available in both 3-SSOP and SC-59 (SOT-23-3) packages, the 3-SSOP variant offers larger thermal pads and improved solder joint reliability due to greater contact area. In designs where long-term mechanical stress or thermal cycling are concerns—such as automotive or industrial equipment—the SSOP’s structural integrity makes it preferable despite its marginally higher profile. Additionally, automated assembly processes often favor SSOP formats for consistent pick-and-place accuracy.
What impact does moisture sensitivity level (MSL) 3 have on handling procedures for bulk quantities of BD48K55G-TL components, and how long can they remain exposed before baking is required?
As an MSL 3 component, the BD48K55G-TL has a floor life of up to 168 hours (seven days) under standard JEDEC storage conditions before absorbing excessive moisture that could cause catastrophic failure during reflow soldering. After this window expires, the parts must undergo bake-out at 125°C for 24–48 hours to remove absorbed moisture safely. Proper labeling and FIFO usage in inventory management are essential to avoid accidental exposure beyond recommended limits.
How does the absence of a specified reset timeout affect system recovery after voltage restoration above 5.5V for the BD48K55G-TL?
Unlike some supervisory ICs that include a built-in delay before asserting reset, the BD48K55G-TL lacks explicit timeout specification, implying immediate assertion of the reset signal upon undervoltage detection and deassertion as soon as VCC exceeds 5.5V. This behavior simplifies timing analysis but requires designers to implement external debouncing if glitches or brief dips below threshold could otherwise trigger false resets. A simple RC filter on the RESET line can mitigate such transient issues without adding significant complexity.
Is the BD48K55G-TL suitable for use in battery-powered devices where supply voltages frequently cross the 5.5V threshold during charge cycles?
The BD48K55G-TL’s fixed 5.5V threshold makes it less ideal for dynamic environments like Li-ion charging stages that span from 3.0V to over 4.2V—well below its detection level. Instead, it is better suited for non-battery applications such as regulated 5V systems or post-regulator monitoring where stable rail integrity is paramount. Attempting to use it directly on raw battery lines would render it inactive until fully charged, defeating its purpose.
How do environmental ratings like -40°C to 105°C influence selection of the BD48K55G-TL over commercial-grade alternatives, and what real-world scenarios justify this choice?
The extended industrial temperature range (-40°C to 105°C TA) allows the BD48K55G-TL to operate reliably in harsh environments such as automotive infotainment modules, factory automation controllers, or outdoor networking gear subject to wide ambient swings. Commercial-grade parts rated only to 0°C–70°C risk functional failure in northern climates or near heat-generating components, making the BD48K55G-TL a safer long-term investment despite potentially identical electrical characteristics at room temperature.
What substitution risks exist when replacing the BD48K55G-TL with the BD48L55G-TL, and how might their differing thresholds affect system stability?
Though both belong to the BD48Kxx base family, substituting BD48L55G-TL for BD48K55G-TL introduces a critical difference: the L-variant typically trips at ~5.3V instead of 5.5V. If the original design relied on the higher margin to tolerate voltage droop or load transients, the lower threshold could cause premature resets during legitimate operational fluctuations. Conversely, if noise immunity was the concern, the tighter threshold might reduce false positives. Either case demands revalidation of system robustness under worst-case conditions.
Given the BD48K55G-TL’s open-drain output, what considerations arise when driving legacy logic families such as TTL or older CMOS chips that expect active-high signals?
Because the BD48K55G-TL asserts reset via active-low sinking, interfacing with TTL inputs expecting active-high logic requires either inversion through a small NPN transistor stage or use of a logic gate like a 74HC04. Alternatively, modern CMOS microcontrollers with Schmitt-trigger inputs can interpret the open-drain signal correctly when pulled high externally. Direct connection without level translation may result in undefined states or marginal noise margins, especially at the extremes of the -40°C to 105°C range.
How does the BD48K55G-TL’s RoHS 3 compliance affect material compatibility in lead-free assembly processes, and are there any hidden restrictions beyond standard halogen limits?
The BD48K55G-TL meets RoHS 3 requirements, meaning it contains no restricted substances above regulatory thresholds, including the full suite of SVHCs. It is compatible with standard SAC305 (tin-silver-copper) solder pastes and conventional reflow profiles (peak ~240°C). There are no additional constraints beyond typical lead-free assembly practices, though users should still consult the latest Rohm Semiconductor packaging documentation for specific alloy recommendations and maximum time above liquidus limits.
Can multiple instances of the BD48K55G-TL share the same reset line without causing contention, and what precautions should be taken?
Yes, multiple BD48K55G-TL devices can share a common reset line provided their open-drain outputs are connected in parallel with individual pull-ups or a single centralized pull-up resistor. However, total sink current from all active outputs must not exceed the absolute maximum rating of any single IC. With typical output saturation voltages around 0.4V at 1mA, paralleling three units would require verifying that the combined current draw doesn’t violate junction temperature limits or degrade response speed due to increased capacitance on the reset line.

Parts with Similar Specifications

The three parts on the right have similar specifications to Rohm Semiconductor BD48K55G-TL

Product Attribute BD48K56G-TL BD48K45G-TL BD48K57G-TL BD48K50G-TL
Part Number BD48K56G-TL BD48K45G-TL BD48K57G-TL BD48K50G-TL
Manufacturer Rohm Semiconductor Rohm Semiconductor Rohm Semiconductor Rohm Semiconductor
Voltage - Threshold - - - -
Reset - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Number of Voltages Monitored - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Series - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Output - - - -
Type - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Mounting Type - Surface Mount Through Hole Surface Mount
Reset Timeout - - - -

BD48K55G-TL Datasheet PDF

Download BD48K55G-TL pdf datasheets and Rohm Semiconductor documentation for BD48K55G-TL - Rohm Semiconductor.

HTML Datasheet
SSOP3 Taping Spec.pdf
PCN Obsolescence/ EOL
DK OBS NOTICE.pdf
Other Related Documents
BD48K55G-TL Flammability.pdf

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Customer Reviews

Evaluation: 10 Articles

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

  • Daic***K.
    Mar 23, 2026

    Very good. No issue after long time testing.

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Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

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Delivery Method

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Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
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Electrostatic Discharge Protection and Handling

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BD48K55G-TL Image

BD48K55G-TL

Rohm Semiconductor
98D-BD48K55G-TL

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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