ADTC144ECAQ-7 - NPN Pre-Biased BJT, 50V, 100mA, SOT-23 | Diodes Inc
部品番号: ADTC144ECAQ-7 ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $0.18 | $0.18 |
| 10 | $0.16 | $1.60 |
| 100 | $0.12 | $12.00 |
| 500 | $0.09 | $45.00 |
| 1,000 | $0.07 | $70.00 |
| 3,000 | $0.0556 | $166.80 |
ADTC144ECAQ-7 概要
A digital transistor (also known as a pre-biased transistor or resistor-equipped transistor, RET) is a BJT with integrated base and base-emitter resistors that replaces a discrete BJT plus two external bias resistors. It belongs to the broader transistor family (BJT > semiconductor > active electronic component). By collapsing three discrete parts into one SOT-23, digital transistors simplify PCB layout, lower BOM count, reduce parasitic inductance, and enable direct logic-level drive from microcontrollers without external bias networks.
Key features include built-in 47 kΩ / 47 kΩ bias resistors (R1 = R2), eliminating the need for external base biasing; an epitaxial planar die construction that improves switching performance and minimizes leakage; and AEC-Q101 qualification that makes the part suitable for automotive applications requiring specific change control. The part is also PPAP capable and manufactured in IATF 16949 certified facilities, with totally lead-free, fully RoHS-compliant, halogen-free and antimony-free "green" device construction.
Architecturally, the ADTC144ECAQ-7 uses a standard NPN epitaxial planar BJT die with monolithic resistor integration. The 47 kΩ / 47 kΩ ratio means the device is biased to switch on when its input voltage exceeds roughly 0.7 V plus the drop across the bias network, allowing direct interface to 1.8 V, 3.3 V, or 5 V logic. The 250 MHz transition frequency supports medium-speed switching applications including level shifting, interface buffering, and relay/LED driver circuits.
Typical applications include digital logic interfacing, MOSFET gate drivers, relay and solenoid drivers, LED indicator drivers, level shifters between logic domains, and inverter stages in automotive body electronics, white goods, and industrial control boards. The automotive-grade qualification broadens use to BCMs, HVAC controls, and instrument cluster signal conditioning. When designing with the ADTC144ECAQ-7, observe the 310 mW power dissipation ceiling, derate above 25 °C ambient, and place the device near the driven load to minimize trace inductance. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
ドロップイン代替品: ADTC144ECAQ-7 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
ADTC144ECAQ-13
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
DDTC144ECA-7
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
DTC144EUA
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MUN2214T1G
✅ ドロップイン📋 参考代替品（カタログ未掲載）
PDTC144EU
✅ ドロップイン📋 参考代替品（カタログ未掲載）
DTC144EUA
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADTC144ECAQ-7 最大定格＆電気的特性
| トランジスタタイプ | NPN Pre-Biased (Digital Transistor / RET) |
| Built-in Resistors R1 / R2 | 47 kΩ / 47 kΩ |
| コレクタ-エミッタ間電圧（Vceo） | 50 V |
| Continuous Collector Current (IC) | 100 mA |
| 遷移周波数（ft） | 250 MHz |
| Total Power Dissipation (Ptot) | 310 mW |
| パッケージ | SOT-23-3 |
| 実装タイプ | Surface Mount |
| 動作温度範囲 | -55 °C to +150 °C (TJ max) |
| Die Construction | Epitaxial Planar |
| Configuration | Single with built-in resistor |
| Automotive Qualification | AEC-Q101 qualified, PPAP capable |
| Manufacturing Standard | IATF 16949 certified facilities |
| RoHS ステータス | Fully RoHS compliant |
| Halogen / Antimony | Free ("Green" device) |
| Lead Finish | Totally lead-free |
| MSLレベル | 1 (per JEDEC J-STD-020) |
| Polarity | NPN |
ADTC144ECAQ-7 ピン構成
| ピン 1 | Base (with R1, R2 bias network) — Base terminal; integrated 47 kΩ R1 (to input) and 47 kΩ R2 (to emitter) form the bias network |
| ピン 2 | Emitter — Emitter terminal, connected to internal R2 bias resistor |
| ピン 3 | Collector — Collector terminal; load is connected between this pin and the supply rail |
主な用途
ADTC144ECAQ-7 の用途: 6 件s: Logic-Level MOSFET Gate Driver, Relay and Solenoid Driver, LED Indicator and Backlight Driver, Logic Level Shifter (3.3V to 5V), Automotive Body Control Module (BCM) Interface, Industrial Control Panel Switching.
Logic-Level MOSFET Gate Driver
The ADTC144ECAQ-7 is a strong fit for low-side MOSFET gate driver stages in 3.3 V or 5 V microcontroller designs. With 47 kΩ integrated bias resistors and 100 mA collector current, it can sink enough base current to drive a small-signal MOSFET gate (Qg below ~10 nC) at kHz to low-MHz PWM rates. The 250 MHz fT means switching edges are well below the audio band, keeping EMI low. Place the transistor close to the MOSFET gate with a short trace to minimize gate-loop inductance; add a 100 Ω gate resistor if ringing is observed on the gate node.
おすすめ
Relay and Solenoid Driver
For driving small automotive relays, latching solenoids, or 12 V indicator loads, the ADTC144ECAQ-7's 100 mA / 50 V envelope covers the typical coil current and back-EMF of small signal relays (≤ 100 mA). The integrated 47 kΩ base resistor lets you wire the BJT directly to a microcontroller GPIO without external bias components. Add a flyback diode across the inductive load, and verify the BJT's VCEO (50 V) exceeds the supply rail plus inductive spike. AEC-Q101 qualification makes this a defensible choice for automotive BCM and HVAC control boards.
おすすめ
LED Indicator and Backlight Driver
The ADTC144ECAQ-7 works well as a low-side constant-current switch for panel-mount LED indicators, status LEDs, and small backlight strings up to 100 mA. With 47 kΩ integrated bias, a logic-level GPIO can directly turn the LED on/off without external base resistors, reducing BOM count on indicator-heavy front panels. The 250 MHz fT is overkill for this use, but it ensures clean switching edges with no audible flicker. Derate collector current below 100 mA and add a series resistor sized for the LED's forward voltage to control brightness and limit inrush.
おすすめ
Logic Level Shifter (3.3V to 5V)
When you need to shift a 3.3 V CMOS logic output up to a 5 V TTL domain without a dedicated level-shifter IC, the ADTC144ECAQ-7 provides a simple single-transistor inverter. Drive the base from the 3.3 V output through the integrated 47 kΩ bias; the collector pulls up to 5 V through an external pull-up resistor and produces an inverted, level-shifted logic signal. This trick is useful for one-off 5 V peripheral interfaces where adding a level-shifter IC is over-budget. The 50 V VCEO provides ample headroom for any 5 V logic rail.
おすすめ
Automotive Body Control Module (BCM) Interface
The ADTC144ECAQ-7's AEC-Q101 qualification, PPAP capability, and IATF 16949 manufacturing make it a credible choice for automotive body electronics — turn-signal buffers, wiper relay drivers, courtesy lamp switches, and HVAC mode indicators. The integrated resistors eliminate two external SMD parts per channel, which is significant on BCMs that handle dozens of low-current loads. Use it as a low-side driver with flyback protection; the 50 V VCEO handles automotive 12 V load-dump transients (with a TVS clamp). Verify full PPAP documentation is on file before safety-critical deployment.
おすすめ
Industrial Control Panel Switching
In industrial control panels, the ADTC144ECAQ-7 simplifies 24 V PLC output interfacing and discrete signal conditioning. Its 50 V VCEO comfortably handles 24 V PLC rails, the 100 mA rating is sufficient for opto-isolator input LEDs, small relays, and signal-lamp loads, and the integrated 47 kΩ bias lets a 5 V or 24 V logic output directly drive the base. Industrial designers often use this kind of pre-biased transistor to clean up noisy mechanical-switch inputs with a simple RC debounce plus the BJT as a Schmitt-trigger buffer, replacing a dedicated comparator IC.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: ADTC144ECAQ-7 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | ADTC144ECAQ-13 | DDTC144ECA-7 | DTC144EUA | MUN2214T1G |
|---|---|---|---|---|---|
| Brand | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated | ROHM Semiconductor | onsemi |
| Package | SOT-23-3 | SOT-23-3 | SOT-23-3 | SOT-23-3 | SOT-23-3 |
| Transistor Type / Polarity | NPN Pre-Biased (RET) | NPN Pre-Biased | NPN Pre-Biased | NPN Pre-Biased | NPN Pre-Biased |
| R1 / R2 (built-in) | 47 kΩ / 47 kΩ | 47 kΩ / 47 kΩ | 47 kΩ / 47 kΩ | 47 kΩ / 47 kΩ | 47 kΩ / 47 kΩ |
| VCEO | 50 V | 50 V | 50 V | 50 V | 50 V |
| Continuous Collector Current (IC) | 100 mA | 100 mA | 100 mA | 100 mA | 100 mA |
主な差別化要因
- AEC-Q101 qualified with full PPAP and IATF 16949 manufacturing （vs DTC144EUA (ROHM))
- Diodes' portfolio offers packaging flexibility within the same die （vs MUN2214T1G (onsemi))
- Higher fT headroom for switching-speed-critical applications （vs MUN2214T1G (onsemi))
設計ノート
The 310 mW power-dissipation rating is specified at 25 °C on a JEDEC-standard test PCB. Estimated: for a SOT-23-3 with copper-pad thermal resistance around 357 °C/W, the part dissipates close to zero rise at 50 mW but climbs fast above that. At 100 mA collector current with VCE(sat) of 200 mV, the on-state dissipation is only 20 mW, so thermal is rarely a concern in saturated switching. In linear-mode operation (active regulation), calculate Pd = VCE × IC and derate above 25 °C ambient; add copper pour under the central pad to drop RθJA by 30-50 % if sustained linear operation is needed.
Lay out the SOT-23-3 footprint per the manufacturer's recommended land pattern — the standard SOT-23 pads are 0.95 mm wide with 0.95 mm pitch. Keep the load (collector trace) short to minimize inductance, especially when switching relay coils or solenoids where back-EMF can spike above VCEO. Place a flyback diode (e.g., 1N4148 or Schottky) directly across any inductive load, oriented cathode-to-supply, and route it close to the inductor to keep the loop area small.
Do not assume the integrated 47 kΩ base resistor lets you drive the part from any logic level — at 1.2 V or below, the BJT may not fully turn on because the base-emitter drop (~0.7 V) leaves too little across R1. Confirm drive headroom at your logic minimum. Also, do not exceed the 50 V VCEO; when switching 24 V industrial rails or 12 V automotive rails, an unclamped inductive kick can exceed this limit and avalanche the device. Finally, do not parallel two ADTC144ECAQ-7 outputs — the integrated bias resistors will not share current evenly, and one device will hog the load.
Although the 250 MHz fT is well above the audio band, parasitic layout inductance at the collector can still ring when switching into a capacitive or partially inductive load. Add a small series gate resistor (10-100 Ω) at the collector if you see > 20 % overshoot on a scope. For high-volume production, consider a TVS clamp across the collector-emitter if the load is at risk of inductive transients beyond 50 V — this protects the BJT without affecting normal switching behaviour.
コンプライアンス情報
AEC-Q101 qualified (automotive-grade transistor standard, distinct from AEC-Q100 IC standard), PPAP capable, manufactured in IATF 16949 certified facilities. Totally lead-free, fully RoHS compliant, halogen-free and antimony-free Green Device per manufacturer datasheet.
