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Product Detailed Parameters
- Description：TRANS BRT NPN 100MA 50V SOT23
- Series：*
- Mfr：onsemi
- Package：Cut Tape (CT),Bulk
- Resistors Included：-
- Transistor Type：-
- Current - Collector (Ic) (Max)：-
- Voltage - Collector Emitter Breakdown (Max)：-
- Resistor - Base (R1)：-
- Resistor - Emitter Base (R2)：-
- DC Current Gain (hFE) (Min) @ Ic, Vce：-
- Vce Saturation (Max) @ Ib, Ic：-
- Current - Collector Cutoff (Max)：-
- Frequency - Transition：-
- Power - Max：-
- Grade：-
- Qualification：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
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Overview
The MMUN2233LT1 is an NPN Bias Resistor Transistor (BRT) from onsemi, housed in a surface-mount SOT-23 package. It integrates a single transistor with a monolithic bias network consisting of a series base resistor (R1 = 4.7 kΩ) and a base-emitter resistor (R2 = 47 kΩ). The device supports a maximum collector current of 100 mA and withstands up to 50 Vdc across the collector-base and collector-emitter terminals. Thermal dissipation reaches 246 mW at 25°C ambient temperature, with an operating junction temperature range spanning from -55°C to +150°C.
Feature Summary
- Integrates a single NPN transistor with a monolithic bias resistor network to replace discrete components
- Reduces printed circuit board space and component count by combining active and passive elements
- Designed for low power surface mount applications using the compact SOT-23 package
Applications
- Level shifting between 12V or 24V circuits and logic levels
- Open collector inverter configurations for signal inversion
- Unregulated current source implementations
Procurement Notes
Verify the specific ordering suffix against official documentation to confirm packaging type and compliance status. Confirm that the requested variant matches the required Pb-Free designation if environmental regulations apply. Cross-reference the manufacturer part number with distributor catalogs to ensure accurate identification before procurement.
Selection Notes
Select this component when a simplified biasing solution is required for NPN switching applications. Ensure the integrated resistor values align with the target input voltage and drive current requirements. Verify that the SOT-23 package dimensions fit within the available footprint constraints of the design.
Part Context
This device belongs to the MMUN22xxLT1 series of digital transistors manufactured by onsemi. The series is designed to eliminate external bias resistors, offering a consolidated solution for driving loads from logic outputs. The MMUN2233LT1 specifically utilizes a 4.7 kΩ base resistor and a 47 kΩ emitter resistor configuration.
Replacement Considerations
Direct substitutes include other BRTs with matching NPN polarity, similar voltage ratings, and comparable internal resistor ratios. Verify pinout compatibility and thermal characteristics when considering alternative manufacturers.
