RN4908(T5L,F,T)

Overview

The RN4908(T5L,F,T) is a dual pre-biased transistor array manufactured by Toshiba Semiconductor and Storage. It integrates one NPN and one PNP epitaxial transistor within a US6 surface-mount package, which features six leads for ultra-compact mounting. The device incorporates built-in bias resistors to simplify circuit design and reduce component count. Key electrical specifications include a maximum collector-emitter voltage of 50V and a continuous collector current of 100mA per transistor. The unit supports a maximum power dissipation of 200mW and operates with transition frequencies up to 200MHz or 250MHz depending on the specific grade.

Feature Summary

• Integrates complementary NPN and PNP transistors into a single compact package
• Includes built-in bias resistors to minimize external component requirements
• Utilizes US6 ultra super mini type packaging for space-constrained designs

Applications

• Switching circuits requiring compact form factors
• Inverter circuits for digital logic interfaces
• Interface circuits connecting different logic families
• Driver circuits for low-power loads

Procurement Notes

Verify the exact suffix configuration when ordering, as variations such as T5L, F, and T indicate specific tape-and-reel or cut-tape packaging options. Confirm RoHS compliance status and ensure the selected variant matches the required transition frequency grade (200MHz vs 250MHz) for the target application performance.

Selection Notes

Select this component when a combined NPN/PNP pair is needed for switching or inversion tasks. The integrated bias resistors eliminate the need for external base resistors, reducing board space and assembly steps. Ensure the 50V voltage rating and 100mA current capacity meet the load requirements while considering the thermal constraints of the small US6 package.

Part Context

This part belongs to Toshiba's RN49xx series of pre-biased transistor arrays. These devices are designed to replace multiple discrete components, including transistors and resistors, in high-density electronics. The US6 package is part of Toshiba's ultra-miniature lineup, offering significant size reduction compared to standard SOT packages while maintaining robust electrical characteristics for general-purpose switching.

Replacement Considerations

Direct substitutes within the same family include RN4904, RN4905, RN4907, RN4985, RN4986, and RN4987. Verify pin compatibility and resistor values before substitution, as these variants differ in internal resistance ratios and hFE gain groups.