FMA1AT148

Overview

The FMA1AT148 is a dual pre-biased PNP transistor array manufactured by ROHM Semiconductor. It integrates two PNP transistors with built-in bias resistors in an SMT5 (SOT-753) surface-mount package. The device features a collector-emitter voltage of 50V and a continuous collector current of 100mA. Each transistor includes a base resistor of 22kΩ and an emitter resistor of 22kΩ, resulting in a resistor ratio of 1. Key electrical parameters include a minimum DC current gain (hFE) of 56 at 5mA/5V, a saturation voltage of 300mV at 10mA collector current, and a transition frequency of 250MHz. Maximum power dissipation is rated at 300mW.

Feature Summary

• Integrates two PNP transistors with built-in bias resistors to reduce component count and simplify circuit design.
• Optimized for high-speed switching applications with a transition frequency of 250MHz.
• Low saturation voltage ensures efficient signal transmission with minimal voltage drop.
• Compact SMT5 package facilitates automated surface-mount assembly and space-constrained layouts.

Applications

• General-purpose switching circuits requiring compact dual-transistor solutions.
• Logic interface circuits for level shifting between different voltage domains.
• Driver stages for relays, solenoids, or small motors in consumer electronics.
• Signal buffering and inversion in digital logic systems.

Procurement Notes

Verify the specific suffix T148 corresponds to the tape-and-reel packaging format required for your production line. Confirm RoHS compliance status and lead times directly with authorized distributors, as availability may vary. Ensure the ordering quantity meets the manufacturer's standard reel size requirements to avoid unnecessary cut-tape premiums.

Selection Notes

Select this component when a dual PNP configuration with equal base and emitter resistors is needed. The 22kΩ resistor values are suitable for standard TTL and CMOS logic interfaces. Compare against single-transistor alternatives if only one channel is utilized, as discrete components may offer lower cost per unit. Verify that the 50V rating exceeds the maximum operating voltage of the target application.

Part Context

The FMA1AT148 belongs to the FMA1A series of complex transistors from ROHM Semiconductor. This series is designed to replace multiple discrete components with integrated arrays, improving reliability and reducing PCB area. The part is commonly used in portable devices and industrial control systems where space efficiency and switching speed are critical design constraints.

Replacement Considerations

The DTA114T is listed as an equivalent single-part alternative for individual channels. For direct dual replacements, verify pin compatibility with other SMT5 dual PNP arrays from ROHM or competitors. Ensure substitute parts match the 22kΩ resistor ratio and 50V voltage rating to maintain circuit performance.