FMA5AT148

Overview

The FMA5AT148 is a dual PNP digital transistor from the ROHM FMA5A series, designed for surface-mount applications in the SOT-25 (SC-74A) package. It integrates two pre-biased transistors with typical base resistors of 2.2 kOhms and an emitter-base resistor ratio of 21. Key electrical specifications include a maximum collector-emitter voltage of -30 V, continuous collector current of -100 mA, and power dissipation of 350 mW. The device features a minimum DC current gain (hFE) of 80 at -10 mA and -5 V, with a transition frequency up to 250 MHz. Operating temperatures extend to +150°C.

Feature Summary

• Dual PNP configuration with integrated biasing resistors simplifies circuit design by reducing component count.
• High-speed operation capability supports frequencies up to 250 MHz for efficient signal processing.
• Compact SOT-25 surface-mount package facilitates automated assembly and space-constrained layouts.

Applications

• General-purpose switching circuits requiring dual PNP logic interfaces.
• Driver stages for low-power loads in consumer electronics.
• Signal level shifting and buffering in digital communication modules.

Procurement Notes

Verify the specific suffix T148 against official ROHM documentation to confirm the exact resistor values and pinout configuration. Ensure compatibility with standard SMT reflow profiles and check RoHS compliance status through authorized distributors. Confirm availability of cut tape or reel options based on production volume requirements.

Selection Notes

Select this component when a dual PNP solution with fixed biasing is required to minimize external passive components. Compare hFE and saturation voltage parameters against load requirements to ensure adequate drive capability. Consider the thermal resistance and power dissipation limits relative to the PCB copper area for heat management.

Part Context

This part belongs to the FMA5A series of digital transistors, which are characterized by their internal resistor networks. The series offers various configurations and resistor values to suit different logic families and drive strengths. The FMA5AT148 specifically targets applications needing dual PNP switching with moderate input impedance.

Replacement Considerations

Direct substitutes may include other dual PNP digital transistors in SOT-25 packages with similar voltage and current ratings. Verify that alternative parts match the 2.2 kOhm base resistor value and hFE characteristics to maintain circuit performance without redesign.