EMA4T2R

Overview

The EMA4T2R is a dual PNP digital transistor manufactured by ROHM Semiconductor, housed in an SOT-553-5 (EMT6) surface-mount package. It integrates two PNP transistors with built-in biasing resistors to simplify circuit design and reduce component count. Key electrical specifications include a maximum collector-emitter voltage (VCEO) of -50 V and a continuous collector current of -100 mA. The device features a typical input resistance of 10 kOhms and supports a maximum operating frequency of 250 MHz. Power dissipation is rated at 150 mW, with a minimum DC current gain (hfe) of 100 at -1 mA and -5 V. The emitter-base voltage (VEBO) is specified at -5 V, and the unit operates within a temperature range up to +150 C.

Feature Summary

• Integrates dual PNP transistors with pre-biasing resistors for simplified switching applications
• Compact SOT-553-5 surface-mount package designed for space-constrained PCB layouts
• High-speed operation capability with a maximum transition frequency of 250 MHz

Applications

• General-purpose switching circuits in consumer electronics
• Driver stages for low-current loads in portable devices
• Logic level translation and interface buffering in embedded systems

Procurement Notes

Verify the specific ordering suffix T2R confirms the tape-and-reel packaging format required for automated assembly processes. Confirm RoHS compliance status through the official datasheet or manufacturer certification documents prior to integration into environmentally regulated products. Ensure the EMT6 package code matches the footprint defined in the ECAD library used for board design.

Selection Notes

Select this component when a dual PNP configuration with integrated base resistors is required to minimize board space and assembly steps. The 10 kOhm input resistance suits standard logic output drivers. Consider the -50 V rating and -100 mA current limit against load requirements. The SOT-553-5 package is suitable for high-density surface-mount technology lines where leaded alternatives are impractical.

Part Context

The EMA4T2R belongs to the EMA4 series of digital transistors from ROHM Semiconductor. This series focuses on providing pre-biased transistor arrays in compact packages to replace discrete resistor-transistor combinations. The dual PNP architecture allows for complementary switching functions within a single footprint, streamlining design for control circuits in battery-powered and portable equipment.

Replacement Considerations

Direct substitutes may include other dual PNP digital transistors in SOT-553-5 packages with similar voltage and current ratings. Verify pinout compatibility and internal resistor values before substitution. Cross-reference with ROHM's EMA series equivalents or competitor offerings that match the 50V/100mA specification profile.