UMC4N-7

Overview

The UMC4N-7 is a dual complementary pre-biased transistor array manufactured by Diodes Incorporated, housed in an SOT-353 surface-mount package. It integrates one NPN and one PNP bipolar junction transistor with built-in bias resistors. The NPN transistor (Q1) features a typical base input resistance of 47 kΩ and an emitter resistor ratio of 1:1. The PNP transistor (Q2) has a typical base input resistance of 10 kΩ and an emitter resistor ratio of 4.7:1. Both transistors support a maximum collector current of 100 mA and a supply voltage of 50 V. The device operates within a temperature range of -55°C to +150°C and offers a gain-bandwidth product of 250 MHz.

Feature Summary

• Integrates complementary NPN and PNP transistors with internal biasing networks to reduce external component count.
• Utilizes ultra-small SOT-353 surface-mount packaging optimized for automated assembly and board space efficiency.
• Constructed using epitaxial planar die technology for enhanced reliability and performance.

Applications

• General-purpose switching applications requiring compact dual-transistor solutions.
• Driver circuits for low-power loads where simplified biasing is required.
• Logic interface circuits utilizing the integrated pre-bias configuration.

Procurement Notes

Verify that the specific part number matches the required electrical characteristics, particularly the internal resistor values which differ between the NPN and PNP elements. Confirm compliance requirements such as RoHS and AEC-Q101 status if applicable to the target application environment. Ensure the ordering suffix corresponds to the correct reel size and quantity specifications provided by the manufacturer.

Selection Notes

Select this component when a dual complementary transistor pair with fixed bias ratios is needed in a minimal footprint. The UMC4N-7 provides distinct resistor configurations for the NPN and PNP sides, making it suitable for asymmetric drive requirements. Consider the thermal resistance and power dissipation limits relative to the expected operating conditions and PCB copper coverage.

Part Context

The UMC4N-7 belongs to the UMC4N series of dual complementary pre-biased transistors from Diodes Incorporated. This series is designed to replace discrete resistor and transistor combinations in digital logic and switching circuits. The standard version is documented under datasheet DS31203, while automotive-compliant variants may be listed separately.

Replacement Considerations

Direct replacements must match the SOT-353 package and the specific internal resistor ratios (47k/1k for NPN and 10k/47k for PNP). Verify pinout compatibility and absolute maximum ratings to ensure safe operation in existing designs.