My Inquiry
My Account
onsemi MMBTA64LT1
- Part No.:
- MMBTA64LT1
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- -
- Datasheet:
-
MMBTA64LT1.pdf
- Description:
- TRANS SS DARL PNP 30V SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,580
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MMBTA64LT1 from onsemi is a PNP silicon Darlington transistor in SOT-23 package, rated for −30 VCE, −500 mA continuous collector current, and 225 mW dissipation on FR-5 board. It delivers DC current gain of 10,000–20,000 at −100 mA, with VCE(sat) ≤ −1.5 V and VBE(on) ≤ −2.0 V, used in low-power switching and signal amplification circuits in automotive and industrial control modules.
For engineers reviewing the MMBTA64LT1 datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed high hFE at moderate current, low saturation voltage under Darlington configuration, thermal derating behavior on standard PCB substrates, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
The MMBTA64LT1 implements a monolithic PNP Darlington pair with integrated base-emitter resistor network absent-external base drive required. Its high hFE (10k–20k) enables microamp-level base current control of 100 mA loads, while VCE(sat) ≤ −1.5 V at IC/IB = 1000 ensures efficient switching in low-voltage logic interfaces.
Thermal performance is defined for two mounting conditions: 556 °C/W RJA on FR-5 board and 417 °C/W on alumina substrate. Junction temperature range spans −55 °C to +150 °C, supporting operation in extended-temperature automotive ECUs and industrial sensor signal conditioning stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −30 V - Maximum blocking voltage between collector and emitter before breakdown; defines safe operating voltage headroom in 24 V automotive supply rails. |
| IC (continuous) | −500 mA - Continuous collector current rating; supports driving small relays, LEDs, or logic-level interface loads without forced cooling. |
| hFE | 10,000–20,000 - DC current gain at −100 mA IC; enables single-stage amplification or switching with minimal base drive circuitry. |
| VCE(sat) | ≤ −1.5 V - Saturation voltage at −100 mA IC, −0.1 mA IB; limits power loss and self-heating during on-state operation. |
| fT | 125 MHz - Current-gain bandwidth product at −10 mA IC; indicates usable frequency limit for small-signal amplification applications. |
| RJA (FR-5) | 556 °C/W - Thermal resistance from junction to ambient on standard epoxy PCB; determines maximum allowable power dissipation at 25 °C ambient. |
Pinout & Package
SOT-23 (TO-236) surface-mount package, 2.90 mm × 1.30 mm × 1.00 mm body, 1.90 mm lead pitch. RoHS-compliant, Pb-free, halogen-free/BFR-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Input control terminal; requires external current-limited drive to bias the Darlington pair into conduction. |
| 2 | Emitter | Common emitter node; connected to higher potential (e.g., VCC) in PNP switching configurations. |
| 3 | Collector | Output current path; sinks load current to ground or lower-potential rail when device is on. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and lighting modules per stress test requirements. |
| High hFE at −100 mA | Guaranteed 10,000–20,000 gain enables direct drive from microcontroller GPIO pins without additional pre-amplification. |
| Low VCE(sat) | ≤ −1.5 V at IC/IB = 1000 reduces conduction losses and improves efficiency in battery-powered or thermally constrained designs. |
| Extended TJ range | −55 °C to +150 °C operation supports deployment in under-hood automotive environments and industrial motor control enclosures. |
Applications
| Automotive Lighting Control | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Switching 12 V LED arrays in interior lighting modules with PWM dimming. IC Role / Device Role / Timing Role: PNP Darlington switch controlling current sink path to ground. Use Value: High hFE allows direct MCU GPIO drive; low VCE(sat) minimizes heat generation in sealed lamp housings. |
Use Scenario: Amplifying low-level analog signals from RTD or thermistor bridges in PLC input modules. IC Role / Device Role / Timing Role: Linear-mode current amplifier boosting bridge output before ADC sampling. Use Value: Stable hFE across temperature ensures consistent gain calibration; wide TJ range maintains accuracy in uncooled cabinets. |
| Power Supply Enable Circuit | Legacy Logic Interface Translation |
|
Use Scenario: Enabling/disabling auxiliary 5 V or 3.3 V rails in multi-rail embedded power systems. IC Role / Device Role / Timing Role: High-side switch controlled by enable signal from system controller. Use Value: −30 V VCEO provides margin against transient spikes; 225 mW PD supports sustained enable states without heatsinking. |
Use Scenario: Level-shifting TTL/CMOS outputs to drive legacy 24 V discrete I/O cards. IC Role / Device Role / Timing Role: Voltage-translating current amplifier interfacing low-voltage logic to industrial field devices. Use Value: Darlington architecture delivers sufficient output current (≥100 mA) while maintaining logic-compatible input thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP Darlington transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBTA64LT3G | Same die, identical electrical specs, but supplied in 10,000-piece tape-and-reel vs. 3,000-piece for MMBTA64LT1G. | No functional difference; optimized for high-volume automated assembly lines requiring larger reels. | Select MMBTA64LT3G for production runs >50k units/year to reduce reel changeovers and line downtime. |
| ZTX951 | Higher VCEO (−60 V), lower hFE (2,000–8,000), TO-92 package; not AEC-Q101 qualified. | Suitable for non-automotive industrial power supplies where higher voltage tolerance outweighs gain and qualification needs. | Choose ZTX951 only if −60 V blocking is mandatory and AEC-Q101 compliance is unnecessary; expect higher base drive requirement. |
Compared with MMBTA64LT1, MMBTA64LT3G offers identical performance in a higher-density reel format ideal for mass production, while ZTX951 trades automotive qualification and high gain for greater voltage headroom and through-hole compatibility-neither is pin-compatible, and both require layout revision.
Availability
MMBTA64LT1 is available at Aetrix Electronics and suitable for automotive lighting control, industrial sensor signal conditioning, and power supply enable circuits requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for MMBTA64LT1 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
onsemi is a global semiconductor manufacturer specializing in energy-efficient electronics, with leadership in automotive, industrial, cloud, and IoT solutions.
The MMBTA64LT1 belongs to onsemi's general-purpose bipolar transistor portfolio, designed specifically for cost-sensitive, high-reliability switching and amplification in automotive and industrial edge applications.
FAQ
What is the maximum continuous collector current rating for the MMBTA64LT1?
The MMBTA64LT1 has a maximum continuous collector current rating of −500 mA at TA = 25 °C. This rating assumes operation within the specified thermal limits and proper PCB layout for heat dissipation. Derating is required above 25 °C ambient-1.8 mW/°C on FR-5 board. The MMBTA64LT1 must not be operated beyond this limit without verifying junction temperature rise using actual board thermal data.
Is the MMBTA64LT1 suitable for automotive applications?
Yes, the MMBTA64LT1 is AEC-Q101 qualified and PPAP capable, making it suitable for automotive applications such as body control modules, lighting drivers, and sensor interfaces. Its −55 °C to +150 °C junction temperature range, Pb-free/halogen-free construction, and validated reliability testing align with automotive electronics requirements. The MMBTA64LT1 meets these standards as shipped in its standard SOT-23 package.
What is the pin configuration of the MMBTA64LT1 in the SOT-23 package?
The MMBTA64LT1 uses Style 6 pinout for SOT-23: Pin 1 is Base, Pin 2 is Emitter, and Pin 3 is Collector. This configuration is confirmed in the official onsemi mechanical drawings and matches the marking diagram showing "V" code for MMBTA64LT1G. Correct orientation is critical-reversing emitter and collector will prevent proper operation or cause device failure.
Does the MMBTA64LT1 have an integrated base resistor?
No, the MMBTA64LT1 does not include an integrated base resistor. It is a bare Darlington transistor requiring external base current limiting-typically via a series resistor driven by a microcontroller or logic gate. Unlike digital transistors (e.g., NSM1012MR), the MMBTA64LT1 provides full design flexibility for optimizing base drive and switching speed, but places responsibility on the circuit designer to ensure proper biasing.
What is the typical DC current gain (hFE) of the MMBTA64LT1 at −100 mA collector current?
The MMBTA64LT1 guarantees hFE between 10,000 and 20,000 at IC = −100 mA and VCE = −5.0 V, per the official onsemi datasheet. This high gain enables very low base current drive-approximately 5–10 µA suffices to fully saturate the device at 100 mA load. The MMBTA64LT1 achieves this performance without compromising VCE(sat) or thermal stability under continuous operation.
MMBTA64LT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- *
- Package/Case:
- -
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Transistor Type:
- -
- Current - Collector (Ic) (Max):
- -
- Voltage - Collector Emitter Breakdown (Max):
- -
- Vce Saturation (Max) @ Ib, Ic:
- -
- Current - Collector Cutoff (Max):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- -
- Power - Max:
- -
- Frequency - Transition:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MMBTA64LT1 FAQ
1.How can I place an order for MMBTA64LT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBTA64LT1 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 MMBTA64LT1 reliable?
The price and inventory of MMBTA64LT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBTA64LT1 is usually 5 days.
3.What payment methods are accepted for MMBTA64LT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBTA64LT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBTA64LT1?
MMBTA64LT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBTA64LT1 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 MMBTA64LT1?
For technical support, including MMBTA64LT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBTA64LT1 requirements.
6.How does Aetrix verify that MMBTA64LT1 is sourced from the original manufacturer or authorized distributors?
All MMBTA64LT1 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 MMBTA64LT1 meets industry standards.
7.What is the process for return or replacement of MMBTA64LT1?
All MMBTA64LT1 units undergo pre-shipment inspection (PSI). If there is an issue with MMBTA64LT1, 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 MMBTA64LT1 part is unused and in its original packaging.
Return procedure for MMBTA64LT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBTA64LT1 Tags
-
MMBT3906LT1G
onsemi
-
MMBT3904-7-F
Diodes Incorporated
-
MMBT3904LT1G
onsemi
-
MMBT3906-7-F
Diodes Incorporated
-
MMBT3904-TP
Micro Commercial Co
-
MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
-
MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
-
MMBT2222ALT1G
onsemi
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
