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HomeProductsIntegrated Circuits (ICs)PMIC - SupervisorsBD48K51G-TL
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BD48K51G-TL - Rohm Semiconductor

Manufacturer Part Number
BD48K51G-TL
Manufacturer
LAPIS Technology
Allelco Part Number
98D-BD48K51G-TL
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
14,649 pcs available, New & Original
Parts Description
IC SUPERVISOR 1 CHANNEL 3SSOP
Package
3-SSOP
Data sheet
BD48K51G-TL.pdf

HTML Datasheet

SSOP3 Taping Spec.pdf

PCN Obsolescence/ EOL

DK OBS NOTICE.pdf LSI 3-1-22.pdf

Environmental Information

BD48K51G-TL Whisker Info.pdf
RoHs Status
ROHS3 Compliant
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Our certification
In stock: 14649
  • Unit Price: $0.193
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $0.193 $0.19
200+ $0.077 $15.40
500+ $0.074 $37.00
1000+ $0.073 $73.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

BD48K51G-TL Tech Specifications
Rohm Semiconductor - BD48K51G-TL technical specifications, attributes, parameters and parts with similar specifications to Rohm Semiconductor - BD48K51G-TL

Product Attribute Attribute Value
Manufacturer LAPIS Technology
Voltage - Threshold 5.1V
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 BD48K51

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)

How does the BD48K51G-TL compare to other voltage detectors in terms of threshold accuracy and temperature stability for battery-powered systems?
The BD48K51G-TL provides a fixed 5.1V threshold with typical hysteresis designed for reliable reset signaling in power-on and brown-out conditions. Its operating temperature range spans -40°C to +105°C, indicating robust thermal performance suitable for automotive and industrial environments where ambient temperature fluctuations are significant. Compared to precision reference-based supervisors, this device trades absolute voltage accuracy for simplicity and cost-effectiveness, making it ideal for systems where moderate threshold tolerance is acceptable and space or BOM cost is constrained.
What design considerations should be applied when integrating the BD48K51G-TL with a microcontroller that uses open-drain GPIO inputs?
Since the BD48K51G-TL features an open drain output, proper pull-up resistor selection is essential. A typical value ranges from 4.7kΩ to 10kΩ depending on system speed requirements and supply voltage. For a 3.3V microcontroller interfacing with the supervisor’s active-low reset signal, a 4.7kΩ pull-up ensures adequate noise margin while minimizing current consumption. Care must also be taken to avoid excessive capacitive loading on the reset line, which could delay signal transitions during power sequencing.
Can the BD48K51G-TL safely operate near its threshold voltage under transient conditions without causing unintended resets?
Yes, but only if the power rail exhibits controlled slew rates. The device includes internal hysteresis (typically around 50–100mV) to prevent chatter due to noise near the 5.1V threshold. However, during rapid power cycling or load transients—such as those caused by motor startup or capacitive switching—the supply may dip momentarily below the reset threshold even if the average voltage remains stable. Designers should ensure that such transients do not violate the minimum reset pulse width specification implied by the lack of a fixed timeout, requiring firmware-based debouncing if necessary.
Is the BD48K51G-TL suitable for use in lead-acid battery monitoring applications, and what adjustments might be needed?
While the 5.1V threshold aligns roughly with a fully charged 6-cell NiMH pack, it is generally too high for direct lead-acid battery supervision unless scaled appropriately via external resistors. Lead-acid cells typically require precise monitoring at 2.1V per cell (~12.6V nominal). Using the BD48K51G-TL directly would result in premature reset assertions. Instead, an RC divider network can scale down the battery voltage so that the 5.1V threshold corresponds to the desired cutoff point, though this reduces input impedance and increases susceptibility to leakage currents in high-impedance configurations.
How does package choice impact PCB layout and thermal performance for the BD48K51G-TL?
The BD48K51G-TL is offered in a 3-SSOP package compatible with TO-236-3 footprint standards. This compact surface-mount form factor allows dense placement on PCBs but demands careful attention to thermal vias if high ambient temperatures approach 100°C, as junction-to-ambient thermal resistance may limit continuous operation under elevated power dissipation scenarios. Additionally, adjacent components must maintain sufficient spacing to avoid coupling noise into the reset line, particularly in mixed-signal designs.
What are the implications of using substitutes like the BD48L51G-TL in place of the BD48K51G-TL?
Substitutes such as the BD48L51G-TL may offer similar electrical characteristics but often differ in packaging, threshold voltage matching, or propagation delay. For example, some variants include built-in delay timers or tighter threshold tolerances (±0.5% vs ±2%), which could affect system reliability if not verified against application-specific timing diagrams. Always cross-check key parameters like reset delay, output rise/fall times, and ESD protection levels before substitution to avoid unforeseen failures in production or field deployments.
Should the BD48K51G-TL be used in systems requiring watchdog timer functionality?
No. The BD48K51G-TL is strictly a power-on reset (POR) supervisor and does not incorporate a programmable watchdog circuit. It monitors only a single undervoltage condition and asserts reset when the monitored voltage drops below 5.1V. Systems needing independent software monitoring or periodic reset verification require an additional dedicated WDT IC or microcontroller-integrated peripheral, increasing both component count and design complexity.
How does moisture sensitivity level (MSL) classification affect handling and storage of BD48K51G-TL devices?
With an MSL rating of 3 (168 hours), the BD48K51G-TL must be assembled within one week after removal from dry packaging to prevent moisture-induced popcorning during reflow soldering. Facilities following IPC/JEDEC J-STD-033 guidelines should implement bake-out procedures for long-term stored inventory. Failure to manage humidity exposure can compromise solder joint integrity, especially in fine-pitch SSOP packages where warpage risk increases with moisture absorption.
In what scenarios would the absence of a defined reset timeout pose a challenge for system recovery?
Without a specified reset delay, the BD48K51G-TL likely responds immediately upon crossing the 5.1V threshold, which may cause rapid cycling during unstable power conditions. For example, if a regulator temporarily undershoots due to load steps, the supervisor might repeatedly assert reset before the MCU completes initialization. Applications sensitive to such behavior—such as medical devices or safety-critical controllers—may need external RC filtering or firmware-level retry logic to dampen false resets and ensure stable boot sequences.
How does RoHS compliance impact material choices and manufacturing processes when sourcing BD48K51G-TL?
As a ROHS3-compliant device, the BD48K51G-TL excludes hazardous substances including lead, mercury, cadmium, and certain flame retardants. This ensures compatibility with global environmental regulations but may influence solder alloy selection during assembly; e.g., tin-silver-copper (SAC305) instead of tin-lead solder. Manufacturers must verify their reflow profiles accommodate these alloys without compromising joint reliability, particularly given the small pitch and thin body geometry of the 3-SSOP package.
What precautions are necessary when cascading multiple voltage detection circuits using devices like the BD48K51G-TL?
Cascading requires careful coordination of threshold voltages and output logic states. If two supervisors monitor different rails (e.g., core voltage and I/O voltage), their reset signals should be combined using diodes or an AND gate to ensure only the most critical fault propagates. Direct paralleling of open-drain outputs risks contention unless matched impedances are maintained. Moreover, mismatched thresholds could lead to asymmetric reset behavior, complicating debugging and validation efforts.
How does the BD48K51G-TL perform under ESD stress compared to higher-performance supervisor ICs?
The BD48K51G-TL meets standard industry ESD specifications (typically ±2kV HBM), but lacks enhanced protection features found in newer generations with integrated clamp diodes or higher discharge thresholds. In harsh EMI environments or when exposed to human handling without proper grounding, repeated ESD events may degrade internal circuitry over time. For applications requiring IEC 61000-4-2 compliance up to ±8kV, consider adding external TVS diodes despite increased board area and cost.
Can the BD48K51G-TL monitor a voltage rail derived from a switched-mode power supply without interference?
Generally yes, provided the monitored rail has sufficient ripple attenuation and the supervisor’s response time accommodates the transient envelope. Switched regulators often exhibit high-frequency noise that could trigger false resets if the BD48K51G-TL’s input filter is inadequate. Adding a modest LC filter or bypass capacitor at the input pin (within 100nF–1μF) helps suppress switching artifacts while preserving fast response to true undervoltage events. Avoid placing decoupling capacitors directly across the input pins without series resistance to prevent oscillation.
What role does base product number play when selecting alternatives or evaluating lifecycle status for the BD48K51G-TL?
The base product number BD48K51 indicates shared core architecture across derivatives like BD48K51G-TL, enabling consistent evaluation of functional equivalence. When assessing substitutes, verifying alignment with this base ensures comparable threshold, output type, and channel count. However, minor revisions in later batches may introduce process improvements or yield changes affecting parametric drift over time—critical factors for long-lifecycle products deployed in industrial controls or infrastructure equipment.
How does ECCN classification affect international export controls for BD48K51G-TL?
Classified under ECCN EAR99, the BD48K51G-TL is generally unrestricted for commercial sale worldwide, simplifying logistics and procurement. However, end-use restrictions may still apply depending on final application (e.g., military, encryption, or nuclear uses), necessitating customer self-certification as per U.S. Export Administration Regulations. Distributors typically handle screening documentation, but engineers should confirm end-user compliance to mitigate supply chain risks.
What are the advantages of using the BD48K51G-TL in space-constrained IoT edge nodes?
At just 3x3mm in the 3-SSOP package, the BD48K51G-TL occupies minimal board real estate while delivering essential POR functionality without external components. Its low quiescent current (typically <1µA) supports energy harvesting applications, and the wide operating temperature range ensures reliability in uncontrolled environments. Combined with RoHS compliance and standard pick-and-place compatibility, it enables compact, compliant designs suitable for remote sensors, wearables, and battery-free devices where simplicity outweighs advanced monitoring needs.

Parts with Similar Specifications

The three parts on the right have similar specifications to Rohm Semiconductor BD48K51G-TL

Product Attribute BD48K54G-TL BD48K55G-TL BD48K56G-TL BD48K50G-TL
Part Number BD48K54G-TL BD48K55G-TL BD48K56G-TL BD48K50G-TL
Manufacturer Rohm Semiconductor Rohm Semiconductor Rohm Semiconductor Rohm Semiconductor
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Voltage - Threshold - - - -
Number of Voltages Monitored - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Base Product Number - DAC34H84 MAX500 ADS62P42
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Reset - - - -
Series - - - -
Type - - - -
Output - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Mounting Type - Surface Mount Through Hole Surface Mount
Reset Timeout - - - -

BD48K51G-TL Datasheet PDF

Download BD48K51G-TL pdf datasheets and Rohm Semiconductor documentation for BD48K51G-TL - Rohm Semiconductor.

HTML Datasheet
SSOP3 Taping Spec.pdf
PCN Obsolescence/ EOL
DK OBS NOTICE.pdf LSI 3-1-22.pdf
Environmental Information
BD48K51G-TL Whisker Info.pdf

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    Great low-power MCU for portable equipment. Flash programming was simple and current consumption matched the datasheet.

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    Reliable FPGA with predictable behavior. Configuration and testing went smoothly, making development faster than expected.

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    Used this device in a communication signal processing board. Stable timing and no unexpected issues during implementation.

  • FPGA***lorer88
    Jul 7, 2026

    The FPGA works properly and all functions operate as expected. Documentation required some additional research, but overall it is a usable device for smaller signal processing projects.

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    Jun 29, 2026

    Used this sensor component in an industrial automation setup. Detection accuracy was consistent and installation was straightforward.

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    Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.

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    Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.

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DHL & FedEx Shipment Charges Reference
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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
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BD48K51G-TL Image

BD48K51G-TL

Rohm Semiconductor
98D-BD48K51G-TL

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