EMA8T2R

Overview

The EMA8T2R is a dual digital transistor manufactured by ROHM Semiconductor, featuring two PNP transistors integrated with built-in bias resistors in a single surface-mount package. This configuration simplifies circuit design by reducing component count and board space. The device is designed for high-speed switching applications, offering a maximum operating frequency of 250 MHz. It operates with a collector-emitter voltage (VCEO) of -50 V and a continuous collector current (IC) of -100 mA. The typical input resistance is 47 kOhms, and the DC current gain (hFE) is specified at a minimum of 68 under standard test conditions. The unit is housed in an SOT-553-3 package, suitable for automated assembly processes.

Feature Summary

• Integrates two PNP digital transistors with built-in resistors to minimize external components
• Optimized for high-frequency switching operations up to 250 MHz
• Compact SMD/SMT packaging facilitates efficient PCB layout and automation

Applications

• General-purpose switching circuits in consumer electronics
• Logic level shifting and interface driving in portable devices
• Driver stages for relays or small loads in industrial control systems

Procurement Notes

Verify the specific ordering suffix T2R to confirm reel packaging and quantity specifications. Ensure compatibility with existing BOM requirements regarding package type and polarity. Cross-reference the manufacturer's latest datasheet for any updates on environmental compliance or recommended soldering profiles prior to procurement.

Selection Notes

Select this component when a dual PNP digital transistor solution is required for space-constrained designs. Consider the 47 kOhm input resistance value for base drive calculations. Verify that the -50 V voltage rating and -100 mA current capacity meet the specific load requirements of the target application circuit.

Part Context

The EMA8 series consists of emitter-common dual digital transistors. The EMA8T2R variant specifically denotes the tape-and-reel packaging format. This family is part of ROHM's standard digital transistor lineup, designed to replace discrete resistor-transistor combinations in various analog and digital switching applications.

Replacement Considerations

Check for direct pin-compatible alternatives within the same ROHM EMA series or comparable offerings from other manufacturers. Ensure that substitute parts match the electrical characteristics, particularly hFE and input resistance values, to maintain circuit performance integrity.