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onsemi FJX2907ATF
- Part No.:
- FJX2907ATF
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
FJX2907ATF.pdf
- Description:
- TRANS PNP 60V 0.6A SC70
- Quantity:
- Payment:
- Shipping:
Inventory:45,554
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Product details
Overview
FJX2907ATF from ON Semiconductor (formerly Fairchild) is a PNP epitaxial silicon general-purpose transistor in SOT-323 package, rated for -60 V VCEO, -600 mA IC, and 325 mW PC; used in low-power switching and amplification circuits such as LED drivers and signal inversion stages in portable instrumentation.
For engineers reviewing the FJX2907ATF datasheet, pinout, applications, or equivalent options, key selection factors include its -60 V breakdown rating, 200 MHz fT, SOT-323 footprint compatibility, and verified saturation performance at -150 mA/-15 mA drive.
Technical Context
This PNP bipolar junction transistor operates with emitter-grounded configuration and supports DC amplification (hFE = 75–300 across IC = -0.1 to -500 mA) and fast switching (tON = 45 ns, tOFF = 100 ns under specified conditions). Its Cob = 8 pF at VCB = -10 V enables stable high-frequency operation up to 200 MHz fT.
The device features low VCE(sat) (-0.4 V @ IC = -150 mA, IB = -15 mA) and VBE(sat) (-1.3 V @ same conditions), supporting efficient current sourcing in compact, battery-powered logic interfaces and level-shifting circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -60 V - supports rail-to-rail operation in negative-supply systems up to ±60 V |
| IC | -600 mA - enables direct driving of medium-current loads like relays or small solenoids |
| PC | 325 mW - suitable for continuous operation in thermally constrained SOT-323 PCB layouts |
| fT | 200 MHz - allows use in audio preamplifiers and RF bias networks below 100 MHz |
| tOFF | 100 ns - ensures clean digital switching in 10 MHz-class clocked logic interfaces |
| Cob | 8 pF - minimizes Miller effect in common-emitter amplifier configurations |
Pinout & Package
SOT-323 (SC-70) surface-mount package: 1.00 mm × 1.25 mm body, 0.95 mm lead pitch, 0.135 mm max thickness; thermally optimized for reflow soldering and hand-soldering on 1 oz copper PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Current-controlled input node | Accepts negative base current to turn on PNP conduction; requires external current-limiting resistor |
| 2 (Emitter) | Current source terminal | Connected to higher-potential rail (e.g., VCC or battery +); defines reference for VBE and VCE |
| 3 (Collector) | Current sink output node | Delivers load current to ground or lower-potential node; voltage swing limited by VCEO = -60 V |
Key Features
| Feature | Design Value |
|---|---|
| High DC current gain | hFE ≥ 75 at IC = -0.1 mA, enabling low-base-drive analog amplification |
| Low saturation voltage | VCE(sat) = -0.4 V @ IC = -150 mA - reduces power loss in switching applications |
| Fast switching speed | tON/tOFF = 45/100 ns - supports pulse-width modulation at >5 MHz |
| Small-outline packaging | SOT-323 footprint - saves >60% board area vs. TO-92, ideal for space-constrained wearables |
Applications
| LED Driver Circuit | Signal Level Shifter |
|---|---|
Use Scenario: Driving red/green indicator LEDs from 3.3 V microcontroller GPIO pins in handheld test equipment. IC Role / Device Role / Timing Role: PNP switch sourcing current from VCC to LED anode while sinking cathode current to MCU pin. Use Value: Low VCE(sat) (-0.4 V) preserves forward voltage margin for reliable LED turn-on at 20 mA. | Use Scenario: Translating 1.8 V logic outputs to -5 V RS-232-compatible levels in legacy interface adapters. IC Role / Device Role / Timing Role: Inverting level translator with emitter-follower output stage referenced to negative supply. Use Value: Verified VBE(sat) (-1.3 V) ensures predictable threshold crossing and <100 ns propagation delay. |
| Portable Audio Amplifier Stage | Power Supply Enable Switch |
Use Scenario: First-stage preamplifier in battery-powered headphone amp with single-ended input and rail-splitting bias. IC Role / Device Role / Timing Role: Common-emitter small-signal amplifier with fixed-bias network and emitter degeneration. Use Value: 200 MHz fT and 8 pF Cob support flat frequency response up to 20 kHz with minimal phase shift. | Use Scenario: Enabling/disabling a 5 V LDO regulator in IoT sensor node based on MCU sleep/wake command. IC Role / Device Role / Timing Role: High-side enable switch controlling LDO EN pin via open-collector interface. Use Value: -60 V VCEO rating provides 10× safety margin against transient spikes on 5 V rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP general-purpose transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBT2907A | Same electrical specs; identical SOT-23 package (not SOT-323); 1.3 mm × 2.9 mm footprint | Requires PCB layout change due to larger pad spacing and different thermal mass | Select when existing SOT-23 land pattern is fixed and thermal derating above 250 mW is acceptable |
| DXT2907AP5-13 | SOT-523 package (1.2 mm × 1.6 mm); same VCEO/IC but hFE min = 100 @ IC = -150 mA | Higher gain consistency at medium currents; tighter tolerance on VCE(sat) | Prefer for precision switching where base drive current must be minimized |
Compared with MMBT2907A and DXT2907AP5-13, the FJX2907ATF offers optimal balance of SOT-323 size efficiency, proven 325 mW power handling, and broad hFE range-making it preferred for new designs prioritizing board area and thermal reliability over legacy footprint reuse.
Availability
FJX2907ATF is available at Aetrix Electronics and suitable for LED driver circuits, portable audio amplifiers, signal level shifters, and power supply enable switches requiring stable component supply and consistent parametric performance across production lots.
Supply support for FJX2907ATF 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
ON Semiconductor (acquired Fairchild Semiconductor in 2016) is a global supplier of energy-efficient semiconductor solutions for automotive, industrial, cloud computing, and consumer electronics.
The FJX2907ATF belongs to Fairchild's legacy general-purpose bipolar transistor family, designed specifically for cost-sensitive, space-constrained linear and switching applications in portable and battery-operated systems.
FAQ
What is the maximum collector current rating for the FJX2907ATF?
The FJX2907ATF has a maximum continuous collector current rating of -600 mA at TA = 25°C. Derating applies above 25°C ambient per the thermal resistance curve in the datasheet; actual usable current depends on PCB copper area and airflow. The FJX2907ATF maintains safe operation up to this limit when mounted on standard 1 oz FR-4 with 25 mm² copper pour.
Does the FJX2907ATF support switching at 10 MHz?
Yes, the FJX2907ATF supports reliable switching at 10 MHz due to its 45 ns turn-on time and 100 ns turn-off time under specified test conditions (VCC = -30 V, IC = -150 mA). At that frequency, the FJX2907ATF remains within its safe operating area provided base drive current is sufficient to achieve full saturation and avoid quasi-saturation delays.
Is the FJX2907ATF RoHS compliant?
Yes, the FJX2907ATF is RoHS compliant and halogen-free per ON Semiconductor's product change notification PCN-17001. It meets EU Directive 2011/65/EU and contains ≤1000 ppm bromine and ≤1000 ppm chlorine. The FJX2907ATF carries the "Pb-Free" marking on tape-and-reel packaging and conforms to JEDEC J-STD-020 moisture sensitivity level 1.
What is the typical hFE range for the FJX2907ATF at IC = -10 mA?
At IC = -10 mA and VCE = -10 V, the FJX2907ATF exhibits a typical hFE range of 100–200, with minimum guaranteed value of 100 per datasheet specifications. This gain stability makes the FJX2907ATF suitable for bias-critical amplifier stages where predictable current transfer ratio is required without active feedback compensation.
Can the FJX2907ATF replace a 2N2907A in existing designs?
No, the FJX2907ATF is not a direct replacement for the through-hole 2N2907A due to fundamental differences in package (SOT-323 vs. TO-92), thermal characteristics, and pinout orientation. While electrical parameters overlap, the FJX2907ATF requires PCB redesign. For drop-in compatibility, consider the MMBT2907A in SOT-23-but verify layout and thermal margins before substituting the FJX2907ATF.
FJX2907ATF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Active
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 600 mA
- Voltage - Collector Emitter Breakdown (Max):
- 60 V
- Vce Saturation (Max) @ Ib, Ic:
- 1.6V @ 50mA, 500mA
- Current - Collector Cutoff (Max):
- 10nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 150mA, 10V
- Power - Max:
- 325 mW
- Frequency - Transition:
- 200MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70 (SOT323)
FJX2907ATF FAQ
1.How can I place an order for FJX2907ATF through Aetrix?
Please submit a Request for Quotation (RFQ) for FJX2907ATF 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 FJX2907ATF reliable?
The price and inventory of FJX2907ATF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FJX2907ATF is usually 5 days.
3.What payment methods are accepted for FJX2907ATF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FJX2907ATF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FJX2907ATF?
FJX2907ATF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FJX2907ATF 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 FJX2907ATF?
For technical support, including FJX2907ATF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FJX2907ATF requirements.
6.How does Aetrix verify that FJX2907ATF is sourced from the original manufacturer or authorized distributors?
All FJX2907ATF 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 FJX2907ATF meets industry standards.
7.What is the process for return or replacement of FJX2907ATF?
All FJX2907ATF units undergo pre-shipment inspection (PSI). If there is an issue with FJX2907ATF, 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 FJX2907ATF part is unused and in its original packaging.
Return procedure for FJX2907ATF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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