MMPQ3904

Overview

The MMPQ3904 is a quad NPN silicon small-signal transistor array manufactured by onsemi. It integrates four independent NPN transistors within a single SO-16 (SC-74A) surface-mount package. The device is designed for general-purpose amplification and switching applications, supporting a maximum collector current of 200 mA per element and a collector-emitter voltage rating of 40 V. This configuration allows for high component density in space-constrained designs while maintaining standard bipolar junction transistor performance characteristics.

Feature Summary

• Integrates four independent NPN transistors into a compact multi-chip module
• Optimized for general-purpose signal amplification and switching operations
• Utilizes a low-profile surface-mount package to support high-density PCB layouts

Applications

• General-purpose amplifier circuits requiring multiple identical stages
• Digital logic switching interfaces and buffer drivers
• Telecommunications equipment signal processing modules

Procurement Notes

Verify the specific manufacturer source when sourcing this part, as it has been produced by multiple entities including Fairchild Semiconductor and onsemi. Confirm that the received component matches the required pinout and electrical specifications for your design. Ensure compliance with RoHS directives if applicable to your manufacturing standards. Check for any obsolescence notices or lifecycle status updates from the current supplier before finalizing procurement plans.

Selection Notes

Select the MMPQ3904 when a design requires four matched NPN switching elements in a minimal footprint. Compare its thermal dissipation capabilities against discrete alternatives if high power loads are anticipated. Ensure the 40V breakdown voltage aligns with the circuit's maximum operating conditions. Consider the SO-16 package dimensions during the mechanical layout phase to ensure adequate clearance and soldering access.

Part Context

This component belongs to the broader family of NPN small-signal transistor arrays. It serves as a functional alternative to using four discrete SOT-23 or SC-70 transistors, reducing board space and assembly complexity. The quad configuration is particularly useful in balanced circuits or multi-channel signal paths where matching characteristics between transistors are beneficial for consistent performance across all channels.

Replacement Considerations

Direct substitutes include the PMMP3904 and MMST3904 variants, though pinouts may differ. Verify compatibility with existing footprints before swapping. Alternative quad NPN arrays from other manufacturers should be evaluated for equivalent hFE ranges and voltage ratings to ensure seamless integration without circuit redesign.