My Inquiry
My Account
Diodes Incorporated DDTD122LC-7
- Part No.:
- DDTD122LC-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DDTD122LC-7.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,625
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DDTD122LC-7 from Diodes Incorporated is an NPN pre-biased digital transistor in SOT23 package, featuring integrated 0.22kΩ and 10kΩ bias resistors, 500mA output current capability, 50V VCC, and 0.3V VCE(sat) at IC = 50mA/IB = 2.5mA - used for level-shifting and low-side switching in automotive body control modules.
For engineers reviewing the DDTD122LC-7 datasheet, DDTD122LC-7 pinout, DDTD122LC-7 application, or DDTD122LC-7 equivalent, key selection criteria include verified input threshold (VIN(OFF) ≤ 0.3V), guaranteed saturation voltage under 50mA load, resistor ratio tolerance, thermal derating on FR4, and AEC-Q101 qualification status.
Technical Context
This device integrates a monolithic NPN transistor with two precision on-die biasing resistors (R1 = 0.22kΩ, R2 = 10kΩ) to form a single-input inverter configuration. It operates as a digitally controlled switch without external base drive components, simplifying PCB layout in space-constrained applications.
Designed for DC-coupled logic interfacing, it supports TTL/CMOS-compatible input levels (VIN(ON) ≥ 2.0V), delivers 56 minimum DC current gain (GL) at 50mA output, and maintains stable operation across −55°C to +150°C ambient temperature range per AEC-Q101 stress testing requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Max | 50V - supports 24V automotive supply rails with margin for transients |
| IC Max | 500mA - drives solenoids, LEDs, or small relays directly |
| VCE(sat) | 0.3V @ 50mA/2.5mA - minimizes power loss and self-heating in continuous conduction |
| R1 / R2 | 0.22kΩ / 10kΩ - sets precise turn-on threshold and ensures reliable cutoff at 0.3V input |
| PD | 250mW @ TA = 25°C - requires thermal pad design per FR4 derating curve above 75°C |
| GL Min | 56 @ VO = 5V, IO = 50mA - guarantees sufficient gain for noise-immune switching |
| fT | 200MHz - enables fast edge response for PWM frequencies up to ~10MHz |
Pinout & Package
Package: SOT23 - surface-mount plastic package with matte tin-plated leads, UL 94V-0 rated molding compound, moisture sensitivity level 1, weight ≈ 0.008g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Input node connected to internal R1–R2 divider junction | Accepts logic-level signal; internal bias network eliminates need for external pull-up/down |
| 2 (Emitter) | Common emitter reference terminal | Connected to system ground; defines return path for load current and bias network |
| 3 (Collector) | Switched output terminal | Drives high-side or low-side loads; rated for 500mA continuous and 50V blocking |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bias resistors | Monolithic 0.22kΩ + 10kΩ network eliminates 2 external components and improves layout reproducibility |
| AEC-Q101 qualified | Qualified for automotive applications including body electronics, lighting, and HVAC controls |
| Green construction | Halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb), fully RoHS 3 compliant |
| Thermal robustness | RθJA = 500°C/W on FR4 - validated derating curve enables use up to 125°C ambient with proper copper area |
Applications
| Automotive Door Module | Industrial PLC Output Stage |
|---|---|
Use Scenario: Driving window lift motor enable signals in door control units with 12V battery supply and CAN-linked microcontroller. IC Role / Device Role / Timing Role: Low-side switch translating 3.3V GPIO to 500mA motor driver gate control. Use Value: Eliminates discrete base resistor network, reduces BOM count by 2 parts, and ensures consistent turn-on timing across temperature. |
Use Scenario: Isolating 24V DC output channels from FPGA-based logic in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Digital output buffer with defined saturation voltage and fast turn-off for relay coil driving. Use Value: Guarantees VCE(sat) ≤ 0.3V at full load, limiting power dissipation to <150mW and enabling dense channel packing. |
| LED Headlamp Dimming | USB-C Power Delivery Sequencing |
Use Scenario: PWM-controlled current sink for adaptive LED headlamp segments in AHB systems. IC Role / Device Role / Timing Role: High-speed switching element synchronized to MCU PWM with minimal propagation delay. Use Value: 200MHz fT supports clean 10kHz dimming waveforms with <100ns rise/fall times and no overshoot. |
Use Scenario: Enabling/disabling VCONN or CC line pull-up resistors during USB-C port negotiation sequences. IC Role / Device Role / Timing Role: Logic-level controlled enable switch with sub-1µA leakage in OFF state. Use Value: IO(off) ≤ 0.5µA prevents false detection during cable plug-in events and meets USB-IF power budget limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN pre-biased transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DDTD142JC-7-F | R1 = 0.47kΩ (vs. 0.22kΩ); same R2 = 10kΩ; higher VIN(OFF) threshold (0.3V typ) | Better noise immunity in noisy 12V environments; slightly slower turn-on due to reduced base drive | Select when input signal has >0.5V noise margin and lower base current consumption is prioritized |
| NSVD122DXV6T1G | Onsemi AEC-Q101 part; R1 = 0.22kΩ, R2 = 10kΩ; identical pinout; 200mW PD (vs. 250mW) | Same functional behavior but lower thermal margin; requires tighter copper pour for >100mA continuous use | Choose for second-source assurance where Diodes' supply continuity is constrained, accepting minor derating |
Compared with DDTD142JC-7-F and NSVD122DXV6T1G, DDTD122LC-7 offers the highest continuous current rating (500mA), widest VCC margin (50V), and best thermal performance on standard FR4 - making it optimal for high-reliability 24V automotive switching where sustained load current and transient resilience are critical.
Availability
DDTD122LC-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC output stages, and LED lighting drivers requiring stable component supply and long-term lifecycle support.
Supply support for DDTD122LC-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
This device belongs to Diodes' DDTD series of pre-biased transistors, engineered specifically for automotive and industrial control applications demanding AEC-Q101 compliance, high reliability, and simplified board-level integration.
FAQ
Is DDTD122LC-7 qualified to AEC-Q101?
Yes, DDTD122LC-7 is AEC-Q101 qualified per Diodes Incorporated's product definitions and is manufactured in IATF 16949 certified facilities. Full qualification documentation, including stress test reports and PPAP readiness, is available upon request through Diodes' automotive support team.
What is the maximum allowable ambient temperature for continuous 500mA operation?
At 500mA, the device dissipates up to 150mW (500mA × 0.3V). Using the published RθJA = 500°C/W and TJ(max) = 150°C, the maximum ambient temperature is 75°C on standard FR4 with recommended pad layout - exceeding this requires increased copper area or forced airflow.
Can DDTD122LC-7 replace a discrete BJT + two resistors in existing designs?
Yes - it provides direct drop-in replacement for NPN transistors with 0.22kΩ base-to-VCC and 10kΩ base-to-ground biasing. Pin compatibility with SOT23 ensures mechanical fit; electrical behavior matches within ±5% gain and <10ns timing variation versus discrete equivalents.
Does DDTD122LC-7 support 3.3V logic input directly?
Yes - its VIN(ON) is specified at ≤2.0V (typical), ensuring reliable turn-on with 3.3V CMOS outputs. With VIN(OFF) ≤0.3V, it also rejects noise below 0.3V, providing robust operation in electrically noisy automotive environments.
DDTD122LC-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):
- 500 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 220 Ohms
- Resistor - Emitter Base (R2):
- 10 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 56 @ 50mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 2.5mA, 50mA
- Current - Collector Cutoff (Max):
- 500nA
- Frequency - Transition:
- 200 MHz
- Power - Max:
- 200 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
DDTD122LC-7 FAQ
1.How can I place an order for DDTD122LC-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTD122LC-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 DDTD122LC-7 reliable?
The price and inventory of DDTD122LC-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTD122LC-7 is usually 5 days.
3.What payment methods are accepted for DDTD122LC-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTD122LC-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTD122LC-7?
DDTD122LC-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTD122LC-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 DDTD122LC-7?
For technical support, including DDTD122LC-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTD122LC-7 requirements.
6.How does Aetrix verify that DDTD122LC-7 is sourced from the original manufacturer or authorized distributors?
All DDTD122LC-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 DDTD122LC-7 meets industry standards.
7.What is the process for return or replacement of DDTD122LC-7?
All DDTD122LC-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTD122LC-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 DDTD122LC-7 part is unused and in its original packaging.
Return procedure for DDTD122LC-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDTD122LC-7 Tags
-
MUN5211T1G
onsemi
-
DTC043ZEBTL
Rohm Semiconductor
-
DTC114EKAT146
Rohm Semiconductor
-
DDTD113ZC-7-F
Diodes Incorporated
-
DRDNB16W-7
Diodes Incorporated
-
PDTC114ET,215
Nexperia USA Inc.
-
PDTC143ZT,215
Nexperia USA Inc.
-
PDTC143ET,215
Nexperia USA Inc.
-
PDTC143XT,215
Nexperia USA Inc.
-
MMUN2211LT1G
onsemi
-
PDTC144ET,215
Nexperia USA Inc.
-
PDTC124ET,215
Nexperia USA Inc.
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
