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HomeProductsIntegrated Circuits (ICs)Specialized ICsPDTA123TU
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PDTA123TU - Freescale / NXP Semiconductors

Manufacturer Part Number
PDTA123TU
Manufacturer
NXP Semiconductors
Allelco Part Number
32D-PDTA123TU
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
5,670 pcs available, New & Original
Parts Description
DAC91001
Data sheet
-
Category
Integrated Circuits (ICs) > Specialized ICs
RoHs Status
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In stock: 5670

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Specifications

PDTA123TU Tech Specifications
Freescale / NXP Semiconductors - PDTA123TU technical specifications, attributes, parameters and parts with similar specifications to Freescale / NXP Semiconductors - PDTA123TU

Product Attribute Attribute Value
Part Number PDTA123TU
Package DAC91001
Description DAC91001
Stock Condition Get 5670 pcs available quantity at Allelco
Payment PayPal / TT / Credit Card / Western Union
Allelco Certifications ESD / ISO 9001 / ISO 13485 / ISO 28000
Product Attribute Attribute Value
Manufacturer NXP Semiconductors
RoHs Status -
Warranty 100% Perfect Functions
Transport port Hong Kong
Shipping by DHL / FedEx / UPS / TNT / SF Express
RFQ Email info@allelco.com

Frequently Asked Questions(FAQ)

How does the PDTA123TU's maximum collector current of 100 mA compare to typical load requirements in low-voltage switching applications, and what design margins should be considered when selecting this transistor for a 5 V logic-driven relay coil?
The PDTA123TU supports up to 100 mA continuous collector current, which is sufficient for driving small relay coils (typically 70–80 mA at 5 V) but leaves minimal headroom for surge currents during coil energizing. Designers should account for transient peaks exceeding 100 mA by using external flyback diodes or opting for relays with lower inrush currents. A conservative selection would target relay loads below 75 mA to maintain reliability under temperature and aging effects.
What are the key differences between the PDTA123TU and the PDTC123TU in terms of pinout, biasing behavior, and typical use cases within SOT23-6 packages?
The PDTA123TU is an NPN-type transistor optimized for high-current gain (hFE ≥ 100) in saturation-mode switching, while the PDTC123TU is a PNP counterpart suited for high-side switching in negative supply rails. Though both share the same physical package and pin arrangement, their internal structures invert emitter and collector roles, altering base drive polarity and voltage swing limits. In practice, the PDTA123TU dominates in positive rail switching due to lower saturation voltage, whereas the PNP variant introduces higher VCE(sat) and requires careful base resistor sizing.
When substituting the PDTA123TU in a legacy design, how should one evaluate thermal performance given its junction-to-ambient thermal resistance (RθJA) isn't specified, and what empirical approach ensures safe operation under continuous conduction?
Since NXP doesn’t publish RθJA for the PDTA123TU, engineers must rely on worst-case power dissipation limits and empirical derating. With a maximum Pd of 300 mW and typical VCE(sat) around 0.2 V at 100 mA, steady-state power loss reaches ~20 mW—well within limits. However, in environments above 40°C ambient, layout parasitics and solder joint quality become critical; thus, testing under actual load with thermal imaging or infrared thermography is recommended to confirm junction temperatures stay below 125°C.
Can the PDTA123TU operate reliably in automotive-grade temperature ranges (-40°C to +125°C), and what compromises might occur in hFE and VBE(sat) at elevated temperatures?
While not officially qualified to AEC-Q101, the PDTA123TU’s silicon bipolar architecture suggests marginal suitability for extended industrial ranges, but not full automotive conditions. At -40°C, hFE may drop by 30–40%, increasing base drive requirements; conversely, at +125°C, VBE(sat) decreases slightly, potentially reducing saturation margin. For safety-critical systems, a dedicated automotive BJT like the BUK9Y12-40E or a MOSFET-based solution is preferable.
In what scenarios would the PDTA123TU be preferred over a MOSFET such as the 2N7002 despite its higher saturation voltage, and how do switching speed and gate drive complexity factor into this decision?
The PDTA123TU excels in ultra-low-voltage, low-frequency switching where gate charge is irrelevant and cost is paramount—such as driving piezo buzzers, incandescent indicators, or legacy relay coils. Its simpler drive requirement (base resistor vs. gate driver IC) and immunity to Miller effect make it ideal for microcontroller GPIO interfaces. However, for >10 kHz PWM or battery-powered systems, the MOSFET’s near-zero static loss outweighs its higher initial turn-on cost, making the PDTA123TU obsolete beyond simple on/off control.
How does the PDTA123TU’s transition frequency (fT) influence its usability in RF signal amplification, and what practical limitations exist given its lack of detailed AC parameter specifications?
With only a generic "high frequency" characterization and no explicit fT value listed, the PDTA123TU cannot support meaningful RF amplification above 1–2 MHz. Its internal capacitances (Cob, Cib) and base transit time limit bandwidth to sub-kHz levels suitable only for audio or slow digital signals. Attempting RF gain risks severe distortion and instability; instead, discrete RF transistors like the BF998 or integrated LNAs should be used for frequencies above 30 MHz.
What considerations apply when cascading multiple PDTA123TU stages in analog signal paths, particularly regarding noise figure and linearity?
Cascading the PDTA123TU introduces significant noise degradation—each stage contributes ~6–8 nV/√Hz from base spreading resistance and shot noise. For two stages, total noise increases by ~1.4×, degrading SNR by 1.2 dB. Moreover, beta roll-off above 100 kHz reduces linearity, causing third-order intercept points (IP3) to fall below 30 dBm even at low input levels. Thus, cascading is only acceptable in low-gain, wideband applications where dynamic range is secondary to simplicity.
How should PCB layout affect the reliability of circuits using the PDTA123TU, especially regarding lead inductance and thermal vias?
Despite its compact SOT23 package, the PDTA123TU remains sensitive to parasitic inductance in the collector path—especially during inductive load turn-off without adequate snubbing. Minimizing loop area between collector, load, and ground plane reduces voltage spikes. Additionally, although the device lacks exposed pads, placing copper pours near emitter leads improves heat dissipation modestly; however, thermal vias offer negligible benefit due to internal structure constraints, so reliance on airflow or adjacent components is more effective.
What role does the PDTA123TU play in LED dimming circuits driven by PWM signals, and why might its storage time limit high-frequency dimming performance?
The PDTA123TU can handle moderate-frequency PWM dimming (up to 1–2 kHz) for indicator LEDs, leveraging its fast turn-off characteristics for clean transitions. However, storage time (ts) in bipolar transistors causes residual conduction after base cutoff, leading to "ghosting" or soft tailing during off cycles. Above 5 kHz, this effect becomes perceptible in brightness uniformity, necessitating either a MOSFET replacement or external clamping diodes to accelerate carrier recombination.
Are there known counterfeit or alternate-marking variants mislabeled as PDTA123TU that could compromise system integrity, and what verification methods ensure authenticity?
Yes—counterfeiters often replicate PDTA123TU markings with slight typographical errors or use non-NXP die in mismatched packages. Reliable verification includes cross-referencing lot codes against NXP’s public database, performing parametric tests (VBE(sat) at 10 mA should be 0.65–0.75 V), and checking package dimensions under magnification. Distributors offering full traceability documentation and X-ray verification reduce risk significantly compared to gray-market sources lacking COAs.

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Customer Reviews

Evaluation: 10 Articles

  • Nord***mbedded
    Jul 20, 2026

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

  • Arch***ct
    Jul 15, 2026

    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.

  • Nath***oleman
    Jun 29, 2026

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

  • Emil***rperTech
    Jun 23, 2026

    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.

  • Liam***terTech
    Jun 15, 2026

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

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • 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.

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Freescale / NXP Semiconductors

PDTA123TU

Freescale / NXP Semiconductors
32D-PDTA123TU

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