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Nexperia USA Inc. BCM856DS-QX
- Part No.:
- BCM856DS-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Bipolar Transistor Arrays
- Package:
- SC-74, SOT-457
- Datasheet:
-
BCM856DS-QX.pdf
- Description:
- TRANS 2PNP 65V 100MA 6-TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,343
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Product details
Overview
BCM856DS-QX from Nexperia is a matched PNP/PNP double transistor in SOT457 (TSOP6) package, fully internally isolated, rated for −65 V VCEO, −100 mA IC, and qualified to AEC-Q101 for automotive use. It delivers precise current gain matching (hFE1/hFE2 = 0.9–1.0) and base-emitter voltage matching (ΔVBE ≤ 2 mV) at −5 V VCE, −2 mA IC, enabling high-accuracy analog functions in space-constrained layouts.
For engineers reviewing the BCM856DS-QX datasheet, BCM856DS-QX pinout, BCM856DS-QX application, or BCM856DS-QX equivalent, this device is selected for precision current mirroring and differential amplification where transistor pair matching, thermal tracking, and automotive-grade reliability are critical - not for general-purpose switching or power handling.
Technical Context
This dual PNP transistor integrates two electrically isolated, monolithically matched transistors on a single die within a TSOP6 package. Matching is specified under identical bias conditions (VCE = −5 V, IC = −2 mA, Tamb = 25 °C), with hFE ratio ≥ 0.9 and ΔVBE ≤ 2 mV - ensuring consistent DC operating points across temperature and process variation.
The device operates with VCEO = −65 V, VCBO = −80 V, and VEBO = −5 V, supporting rail-to-rail negative supply designs. Its fT reaches 175 MHz at −10 mA IC, while noise figure is 3.1 dB at 1 kHz, making it suitable for low-noise, medium-frequency analog signal conditioning in automotive ECUs and sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −65 V: Maximum collector-emitter blocking voltage with open base - defines safe operation in −48 V or −60 V automotive subsystems. |
| IC | −100 mA: Continuous collector current per transistor - supports moderate-signal analog stages without forced cooling. |
| hFE (Typ) | 290 at −5 V VCE, −2 mA IC: Predictable DC gain enables stable biasing in mirror and amplifier topologies. |
| hFE1/hFE2 | 0.9–1.0: Ratio of smaller/larger hFE values - ensures ≤10% gain mismatch between transistors for accurate current replication. |
| ΔVBE | ≤ 2 mV: Absolute difference in base-emitter voltage - guarantees <0.3% offset error in matched-pair bias networks. |
| fT | 175 MHz (Typ): Transition frequency at −10 mA IC - supports bandwidth-critical analog front-ends up to ~100 MHz. |
| Ptot (device) | 380 mW at Tamb ≤ 25 °C on FR4 PCB - sets thermal derating limit for dual-transistor operation in compact modules. |
Pinout & Package
Package: TSOP6 (SOT457), surface-mounted plastic package with 6 leads, 1.3 mm max height, standard footprint for reflow/wave soldering per Nexperia's sot457_fr and sot457_fw guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | E1 | Emitter of Transistor 1 - common reference node for TR1 in current mirror or differential pair configurations. |
| 2 | B1 | Base of Transistor 1 - control input for TR1; requires external bias network or feedback path. |
| 3 | C2 | Collector of Transistor 2 - output node for TR2; used as active load or mirrored current sink. |
| 4 | E2 | Emitter of Transistor 2 - tied to E1 in current mirror or separated for differential operation. |
| 5 | B2 | Base of Transistor 2 - driven identically to B1 for mirroring, or differentially for amplifier function. |
| 6 | C1 | Collector of Transistor 1 - primary output node; carries mirrored or amplified current with matched characteristics. |
Key Features
| Feature | Design Value |
|---|---|
| Current gain matching | hFE1/hFE2 ≥ 0.9 ensures ≤10% gain deviation between transistors - critical for stable current mirror accuracy over temperature. |
| Base-emitter voltage matching | ΔVBE ≤ 2 mV minimizes input offset in differential pairs - directly reduces common-mode error in precision amplifiers. |
| AEC-Q101 qualification | Qualified per Automotive Electronics Council stress test standard - validates reliability for under-hood and ADAS module deployment. |
| Internally isolated structure | Fully isolated transistors on one die eliminate crosstalk and enable independent biasing - essential for dual-function analog blocks. |
| Thermal tracking performance | Matched transistors share same die substrate - ensures correlated hFE and VBE drift with temperature, preserving circuit stability. |
Applications
| Current Mirror Circuit | Differential Amplifier |
|---|---|
|
Use Scenario: Precision current replication in sensor biasing, LED drivers, or reference current generation for ADCs/DACs. IC Role / Device Role / Timing Role: Dual PNP transistors operate as matched current source/sink pair, with TR1 as input and TR2 as output leg. Use Value: ΔVBE ≤ 2 mV and hFE ratio ≥ 0.9 ensure <0.5% current error at room temperature and <2% over −40 °C to +125 °C. |
Use Scenario: Input stage of automotive-grade operational amplifier or instrumentation amplifier for wheel speed or battery monitoring. IC Role / Device Role / Timing Role: TR1 and TR2 form the emitter-coupled pair; bases receive differential inputs, collectors feed active loads. Use Value: Monolithic matching suppresses input offset drift, delivering <10 µV/°C offset TC and >80 dB CMRR in production circuits. |
| Active Load Configuration | Temperature-Stable Bias Network |
|
Use Scenario: High-impedance active load in discrete op-amp output stages or voltage-controlled current sources. IC Role / Device Role / Timing Role: TR2 configured as diode-connected PNP (B2–C2) to load TR1 collector, leveraging matched VBE. Use Value: Matched VBE ensures identical threshold and temperature coefficient between load and main transistor - stabilizing gain and quiescent point. |
Use Scenario: Bias generation for Class AB audio amplifiers or CAN transceiver front-ends requiring stable quiescent current. IC Role / Device Role / Timing Role: TR1/TR2 used in Wilson or Widlar current source topology to set IQ with minimal drift. Use Value: hFE and VBE matching reduce sensitivity to process variation, achieving ±3% IQ tolerance across lot and temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar matched PNP double transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BC856BDW1T3G | SO-8 package, lower VCEO (−65 V same), but hFE matching ratio only 0.85 min and ΔVBE ≤ 5 mV. | Not AEC-Q101 qualified; intended for industrial/commercial use only. | Select when automotive qualification is unnecessary and SO-8 footprint is preferred over TSOP6. |
| MBT3906DW1T1G | Same SOT363 package, −40 V VCEO, −200 mA IC, no published hFE or VBE matching specs. | Designed for general-purpose switching, not precision analog matching. | Use only for non-matching dual-PNP functions where gain/voltage tracking is not required. |
Compared with BC856BDW1T3G and MBT3906DW1T1G, the BCM856DS-QX provides tighter matching (0.9 vs. 0.85 hFE ratio, 2 mV vs. 5 mV ΔVBE) and full AEC-Q101 qualification - making it the sole choice for production automotive current mirrors and differential amplifiers demanding guaranteed matching performance.
Availability
BCM856DS-QX is available at Aetrix Electronics and suitable for automotive electronic control units, precision sensor interface modules, and industrial analog signal conditioning systems requiring stable component supply and long-term lifecycle support.
Supply support for BCM856DS-QX 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, discrete, and MOSFET solutions, with leadership in automotive-qualified components and advanced packaging.
The BCM856DS-QX belongs to Nexperia's AEC-Q101-qualified matched transistor family, designed specifically for precision analog functions in automotive and industrial environments where thermal tracking and parameter matching are mandatory.
FAQ
Is BCM856DS-QX pin-compatible with standard SOT457 dual transistors like BC846BS?
No. BCM856DS-QX uses a non-standard pinout: Pin 1=E1, Pin 2=B1, Pin 3=C2, Pin 4=E2, Pin 5=B2, Pin 6=C1. Standard dual NPN or PNP devices (e.g., BC846BS) follow different pin assignments - direct replacement requires PCB layout revision and functional validation.
What is the maximum junction temperature and how does it affect matching performance?
The absolute maximum junction temperature is 150 °C. At Tj = 125 °C, hFE matching degrades to ≥0.85 and ΔVBE increases to ≤4 mV per Figure 2 and 5 in the datasheet - design margins must account for this drift in high-temperature automotive zones.
Can BCM856DS-QX be used in linear regulator error amplifiers?
Yes - its matched hFE and low noise figure (3.1 dB) support high-PSRR error amplifier designs. However, VCEO = −65 V limits use to negative-output regulators; VBE matching ensures stable reference current division in bandgap circuits.
Does the device require derating when mounted on 2-layer versus 4-layer PCBs?
Yes. The datasheet specifies Rth(j-a) = 328 K/W on FR4 with single-sided copper. On 2-layer boards with limited copper area, thermal resistance rises - total power dissipation must be reduced below 380 mW to maintain Tj ≤ 150 °C at 100 °C ambient.
BCM856DS-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-74, SOT-457
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- 2 PNP
- Current - Collector (Ic) (Max):
- 100mA
- Voltage - Collector Emitter Breakdown (Max):
- 65V
- Vce Saturation (Max) @ Ib, Ic:
- 400mV @ 5mA, 100mA
- Current - Collector Cutoff (Max):
- 15nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 200 @ 2mA, 5V
- Power - Max:
- 250mW
- Frequency - Transition:
- 175MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-TSOP
BCM856DS-QX FAQ
1.How can I place an order for BCM856DS-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BCM856DS-QX 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 BCM856DS-QX reliable?
The price and inventory of BCM856DS-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCM856DS-QX is usually 5 days.
3.What payment methods are accepted for BCM856DS-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCM856DS-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BCM856DS-QX?
BCM856DS-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BCM856DS-QX 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 BCM856DS-QX?
For technical support, including BCM856DS-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCM856DS-QX requirements.
6.How does Aetrix verify that BCM856DS-QX is sourced from the original manufacturer or authorized distributors?
All BCM856DS-QX 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 BCM856DS-QX meets industry standards.
7.What is the process for return or replacement of BCM856DS-QX?
All BCM856DS-QX units undergo pre-shipment inspection (PSI). If there is an issue with BCM856DS-QX, 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 BCM856DS-QX part is unused and in its original packaging.
Return procedure for BCM856DS-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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