DTB743EETL

Overview

The DTB743EETL is a PNP digital transistor manufactured by Rohm Semiconductor, featuring built-in thin-film bias resistors. It operates with a supply voltage of -30V and a maximum collector current of -200mA. The device incorporates an internal resistance ratio (R2/R1) of 1, with typical R1 and R2 values of 4.7kΩ. Key electrical parameters include a DC current gain (GI) ranging from 115 to 600, a transition frequency (fT) of 260MHz, and a low saturation voltage (VCE(sat)) of -300mV at -50mA/-2.5mA. Power dissipation is rated at 150mW, housed in an EMT3 surface-mount package.

Feature Summary

• Lower VCE(sat) compared to conventional products for improved efficiency.
• Built-in bias resistors eliminate the need for external input resistors in inverter circuits.
• Thin-film resistors provide complete isolation, allowing positive input biasing and minimizing parasitic effects.

Applications

• Inverter circuits
• Interface applications
• Driver circuits

Procurement Notes

Verify the specific ordering suffix against the manufacturer's documentation to confirm packaging type and quantity. The 'TL' suffix indicates tape and reel packaging with a standard unit quantity of 3000 pieces. Confirm RoHS compliance status and ensure the component meets the required storage temperature range of -55°C to +150°C for your specific application environment.

Selection Notes

Select this component when a PNP digital transistor with integrated biasing is required for space-constrained designs. The low saturation voltage makes it suitable for applications demanding efficient switching. Ensure the circuit design accounts for the negative polarity requirements inherent to PNP devices and verify that the 150mW power dissipation rating is sufficient for the intended load conditions.

Part Context

This part belongs to Rohm's series of low VCE(sat) digital transistors with built-in resistors. It utilizes a PNP epitaxial planar silicon structure. The device is designed for general-purpose electronic equipment and is not intended for radiation-tolerant or high-reliability safety-critical applications such as medical or aerospace systems without additional verification.

Replacement Considerations

Consult the official Rohm datasheet for confirmed substitute part numbers. Verify pinout compatibility and electrical parameter alignment before substitution.

FAQ

What is the function of the built-in resistors in the DTB743EETL?

The built-in resistors allow the configuration of an inverter circuit without connecting external input resistors, simplifying the design and eliminating parasitic effects through thin-film isolation.

What is the transition frequency (fT) of this device?

The transition frequency is 260 MHz, measured at VCE = -10V, IE = 5mA, and f = 100MHz.

Can the DTB743EETL be used for automotive applications?

No, the product is not designed for use in automotive equipment or systems requiring extremely high reliability where failure may threaten human life.