The CJ431 is a voltage Reference made by Jiangsu Changjing Electronics Technology (CJ) in a SOT-89-3 package with 3 pins. -25℃~+85℃@(Ta) 100mA 1mA 2.5V~36V 50ppm/℃ Adjustable Parallel ±0.5% SOT-23 Voltage Reference ROHS.
PCBKit's library has its KiCad symbol (EasyEDA_Pro:CJ431, from EasyEDA Pro) and its footprint (Package_TO_SOT_SMD:SOT-89-3, from KiCad's library), ready for a KiCad board. 651,828 are in stock at JLCPCB (part C3113). 24 open-source boards in 21 repositories on GitHub use it.
| Parameter | Conditions | As printed | Page |
|---|---|---|---|
| Cathode Voltage VKA | Operating temperature range applies unless otherwise specified | max 37 V | 1 |
| Cathode Current Range (Continuous) IKA | Operating temperature range applies unless otherwise specified | min -100 · max 150 mA | 1 |
| Reference lnput Current Range Iref | Operating temperature range applies unless otherwise specified | min 0.05 · max 10 mA | 1 |
| Power Dissipation PD | Operating temperature range applies unless otherwise specified | max 500 mW | 1 |
| Thermal Resistance from Junction to Ambient RθJA | SOT-89-3L | max 250 ℃/W | 1 |
| Operating Ambient Temperature Range Topr | min 0 · max 70 ℃ | 1 | |
| Storage temperature Range Tstg | min -65 · max 150 ℃ | 1 | |
| Operating JunctionTemperature Tj | max 150 ℃ | 1 | |
| Reference input voltage Vref | Ta=25 ℃; VKA=VREF, IKA=10mA | min 2.45 · typ 2.5 · max 2.55 V | 1 |
| Deviation of reference Input voltage over temperature (note) △Vref /△T | VKA =VREF, IKA =10mA; Tmin≤Ta≤Tmax; TMIN=0℃, TMAX=+70 ℃ | typ 4.5 · max 17 mV | 1 |
| Ratio of change in reference lnput voltage to the change in cathode voltage △Vref /△VKA | Ta=25 ℃; IKA=10mA; △VKA=10V~VREF | typ -1 · max -2.7 mV/V | 1 |
| Ratio of change in reference lnput voltage to the change in cathode voltage △Vref /△VKA | Ta=25 ℃; IKA=10mA; △VKA=36V~10V | typ -0.5 · max -2 mV/V | 1 |
| Reference input current lref | Ta=25 ℃; IKA= 10mA,R1=10kΩ; R2=∞ | typ 1.5 · max 4 uA | 1 |
| Deviation of reference input current over full temperature range △lref /△T | lKA=10mA, R1=10kΩ; R2=∞; TA=full Temperature | typ 0.4 · max 1.2 uA | 1 |
| Minimum cathode current for regulation IKA(min) | Ta=25 ℃; VKA=VREF | typ 0.45 · max 1 mA | 1 |
| Off-state cathode current IKA(OFF) | Ta=25 ℃; VKA=36V ,VREF=0 | typ 0.05 · max 1 uA | 1 |
| Dynamic impedance ZKA | Ta=25 ℃; VKA=VREF, lKA=1 to 100mA; f≤1.0kHz | typ 0.15 · max 0.5 Ω | 1 |
| Range Vref | Rank 0.5% | min 2.487 · max 2.513 | 1 |
| Range Vref | Rank 1% | min 2.475 · max 2.525 | 1 |
| Pin | Name | Type |
|---|---|---|
| 1 | R | Unspecified |
| 2 | K | Unspecified |
| 3 | A | Unspecified |
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<iframe src="https://pcbkit.io/embed/parts/cj/CJ431" title="CJ431 in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/cj/CJ431.jpg" alt="CJ431" width="1200" height="900">[](https://pcbkit.io/parts/cj/CJ431)Yes. The symbol is EasyEDA_Pro:CJ431 and the footprint Package_TO_SOT_SMD:SOT-89-3, both drawn on this page. PCBKit places them on a board for you when you design with it.
SOT-89-3, with 3 pins. Its footprint is drawn on this page.
Jiangsu Changjing Electronics Technology (CJ) publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C3113, with 651,828 in stock; the sellers' links on this page open their listings.
Parts like it in the library: the AZ431AR-ATRE1 by Diodes Incorporated, the TL431BIPK by Texas Instruments, the LR431AOT1G by Leshan Radio (LRC) and the TL431BQPK by Texas Instruments. Check their datasheets: a part that fits the footprint may still differ in its ratings.
24 boards in 21 repositories on GitHub; the most starred are listed on this page, with their KiCad files.
