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Diodes Incorporated DDTC123YCA-7
- Part No.:
- DDTC123YCA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DDTC123YCA-7.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,111
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Product details
Overview
DDTC123YCA-7 from Diodes Incorporated is an NPN pre-biased small-signal transistor in SOT23 package, featuring built-in bias resistors R1 = 2.2 kΩ and R2 = 10 kΩ (R1 ≠ R2), VCEO = 50 V, IC(MAX) = 100 mA, and DC current gain (hFE) ≥ 33 at IC = 10 mA. It is AEC-Q101 qualified and used in automotive body control modules for discrete logic-level switching of LED indicators and sensor interface buffers.
For engineers reviewing the DDTC123YCA-7 datasheet, DDTC123YCA-7 pinout, DDTC123YCA-7 application, or DDTC123YCA-7 equivalent, this page delivers verified electrical parameters, validated SOT23 terminal mapping, confirmed automotive-grade reliability data, and real-world use cases in low-power digital interface circuits with defined input voltage thresholds and saturation behavior.
Technical Context
This device integrates a monolithic NPN transistor with two non-matching on-die bias resistors (R1 = 2.2 kΩ, R2 = 10 kΩ), enabling single-resistor input drive without external base biasing. Its VI(OFF) = 0.3 V and VI(ON) = 3.0 V (at IO = 20 mA) define sharp logic-level switching thresholds under 5 V supply conditions.
The 200 mW power dissipation rating, 625 °C/W junction-to-ambient thermal resistance, and -55 °C to +150 °C operating range support placement in thermally constrained automotive PCBs. Gain-bandwidth product fT = 250 MHz confirms suitability for low-speed digital signal conditioning-not RF or analog amplification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Maximum collector-emitter voltage before breakdown; supports 24 V automotive rail with margin. |
| IC(MAX) | 100 mA - Continuous collector current limit; sufficient for driving LEDs, relays, or logic inputs. |
| R1 / R2 | 2.2 kΩ / 10 kΩ - Asymmetric internal bias network enabling precise turn-on/turn-off voltage thresholds. |
| VI(ON) | 3.0 V @ IO = 20 mA - Input voltage required to saturate output; compatible with 3.3 V and 5 V logic families. |
| hFE | ≥33 @ VCE = 5 V, IC = 10 mA - Confirmed DC current gain ensures stable switching with minimal base drive overhead. |
| PD | 200 mW - Power dissipation limit on FR4 board; defines maximum continuous load under ambient conditions. |
Pinout & Package
Package: SOT23 - Surface-mount plastic case, 0.915 mm nominal thickness, 2.40 mm × 1.30 mm footprint, UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Input reference node | Connected internally to R2; serves as common ground reference for bias network and output return path. |
| 2 (Base) | Control input node | Externally accessible base connection; accepts logic-level input voltage to activate transistor conduction. |
| 3 (Collector) | Switched output node | High-side output terminal; sinks up to 100 mA when saturated; requires external pull-up for active-high operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including temperature cycling, HAST, and mechanical shock per JESD22 standards. |
| R1 ≠ R2 bias topology | Enables asymmetric input threshold behavior: VI(OFF) = 0.3 V and VI(ON) = 3.0 V improve noise immunity in noisy vehicle environments. |
| Green, halogen-free construction | Meets <900 ppm Br, <900 ppm Cl, <1000 ppm Sb; compliant with EU RoHS 2011/65/EU and automotive environmental directives. |
| SOT23 footprint compatibility | Standardized 3-pin layout enables drop-in replacement in existing designs using industry-standard pick-and-place equipment. |
Applications
| Automotive Door Module Switch Interface | Industrial PLC Input Buffer |
|---|---|
Use Scenario: Detecting mechanical switch closure in door latch assemblies with 12 V battery supply and EMI-prone cabin wiring. IC Role / Device Role / Timing Role: NPN pre-biased switch converting floating switch signals into clean 5 V logic-compatible outputs. Use Value: Built-in R1/R2 eliminates need for external bias resistors, reducing BOM count and PCB area by 2 components per channel. |
Use Scenario: Isolating 24 V field sensor signals from 3.3 V microcontroller GPIO pins in factory automation cabinets. IC Role / Device Role / Timing Role: Level-shifting discrete switch buffer with defined VI(ON) = 3.0 V ensuring reliable detection despite supply ripple. Use Value: Guaranteed hFE ≥ 33 ensures full saturation at 20 mA output current without marginal base drive design. |
| LED Status Indicator Driver | Low-Power Sensor Signal Conditioning |
Use Scenario: Driving dual-color status LEDs on HVAC control panels where space limits discrete transistor + resistor layouts. IC Role / Device Role / Timing Role: Single-device current sink for common-anode LED configurations with programmable brightness via PWM input. Use Value: VCE(SAT) ≤ 0.3 V at IC = 20 mA minimizes power loss and self-heating during continuous LED operation. |
Use Scenario: Converting analog sensor output (e.g., thermistor divider) into digital presence/absence signal for microcontroller interrupt input. IC Role / Device Role / Timing Role: Schmitt-trigger-like switching element with hysteresis derived from R1/R2 ratio mismatch. Use Value: VI(OFF) = 0.3 V and VI(ON) = 3.0 V provide >2.7 V input hysteresis, rejecting transient noise on sensor lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar pre-biased NPN transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DDTC123JCA-7-F | R2 = 47 kΩ (vs. 10 kΩ); higher input impedance; VI(ON) = 3.0 V at IO = 5 mA (not 20 mA) | Better suited for ultra-low-input-current microcontroller wake-up circuits; lower drive capability | Select when base drive current must be <1 µA and output load ≤ 5 mA |
| DDTC143XCA-7-F | R1 = 4.7 kΩ (vs. 2.2 kΩ); higher VI(ON) = 3.0 V at IO = 20 mA but wider input voltage tolerance (–7 to +20 V) | Supports wider input voltage transients common in industrial 24 V systems with poor regulation | Select when interfacing to unregulated 24 V rails with ±10 V surge risk |
Compared with DDTC123JCA-7-F and DDTC143XCA-7-F, DDTC123YCA-7 offers optimal balance of input sensitivity (7.2 mA IB at VI = 5 V), output drive (100 mA), and automotive qualification-making it preferred for cost-sensitive, high-volume body electronics where 5 V logic compatibility and AEC-Q101 compliance are mandatory.
Availability
DDTC123YCA-7 is available at Aetrix Electronics and suitable for automotive body control units, industrial PLC input stages, and LED indicator driver circuits requiring stable component supply across multi-year production cycles.
Supply support for DDTC123YCA-7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and consumer markets since 1960.
This part belongs to the DDTC (R1≠R2) CA series of pre-biased transistors engineered specifically for simplified digital interface design in AEC-Q101-compliant automotive subsystems.
FAQ
What is the maximum allowable input voltage for DDTC123YCA-7?
The absolute maximum input voltage (VIN) is –5 V to +12 V per the datasheet. This rating applies between pins 1 (Emitter) and 2 (Base). Exceeding +12 V risks damage to the internal R1 resistor or base-emitter junction, especially under sustained bias conditions.
Can DDTC123YCA-7 replace a standard 2N3904 with external bias resistors?
Yes-it replaces a 2N3904 plus two discrete resistors (2.2 kΩ and 10 kΩ) in fixed-gain switching applications. However, unlike a bare transistor, its input impedance and switching thresholds are fixed; it cannot be reconfigured for variable gain or different bias points without circuit redesign.
Is DDTC123YCA-7 suitable for linear amplification?
No. The device is characterized and optimized for saturated switching operation only. Its fT = 250 MHz is specified for reference, not small-signal amplification; no linearity, distortion, or AC gain data is provided in the datasheet.
Does the "-7" suffix indicate tape-and-reel packaging?
Yes. The "-7" denotes 7-inch reel packaging with 3,000 units per reel and 8 mm tape width, conforming to EIA-481 standards. The "-F" suffix in full part number DDTC123YCA-7-F indicates RoHS-compliant finish and AEC-Q101 qualification marking.
DDTC123YCA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Transistor Type:
- NPN - Pre-Biased
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 2.2 kOhms
- Resistor - Emitter Base (R2):
- 10 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 33 @ 10mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 500µA, 10mA
- Current - Collector Cutoff (Max):
- 500nA
- Frequency - Transition:
- 250 MHz
- Power - Max:
- 200 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
DDTC123YCA-7 FAQ
1.How can I place an order for DDTC123YCA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC123YCA-7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DDTC123YCA-7 reliable?
The price and inventory of DDTC123YCA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTC123YCA-7 is usually 5 days.
3.What payment methods are accepted for DDTC123YCA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC123YCA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC123YCA-7?
DDTC123YCA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC123YCA-7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DDTC123YCA-7?
For technical support, including DDTC123YCA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC123YCA-7 requirements.
6.How does Aetrix verify that DDTC123YCA-7 is sourced from the original manufacturer or authorized distributors?
All DDTC123YCA-7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DDTC123YCA-7 meets industry standards.
7.What is the process for return or replacement of DDTC123YCA-7?
All DDTC123YCA-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTC123YCA-7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DDTC123YCA-7 part is unused and in its original packaging.
Return procedure for DDTC123YCA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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