Nexperia USA Inc. PEMH9,315

Overview

PEMH9 from Nexperia is an NPN/NPN resistor-equipped double transistor (RET) in SOT666 package, rated for 50 V V_CEO, 100 mA output current per transistor, with integrated bias resistors R1 = 10 kΩ and R2 = 47 kΩ. It functions as a dual digital switching element for low-current logic interfacing and peripheral control in space-constrained PCBs.

For engineers reviewing the PEMH9 datasheet, PEMH9 pinout, PEMH9 application, or PEMH9 equivalent, this device is selected for compact dual-transistor logic-level translation, IC input driving, and replacement of discrete BJT pairs where board area and assembly cost are critical.

Technical Context

The PEMH9 integrates two matched NPN transistors with on-chip base bias networks-R1 (input resistor) and R2 (feedback resistor)-enabling direct TTL/CMOS-compatible switching without external bias components. Each transistor operates independently with open-base V_CEO = 50 V and I_O = 100 mA rating.

Its SOT666 package supports high-density mounting with 0.5 mm pitch and thermal resistance R_th(j-a) = 417 K/W (per device), optimized for FR4 PCBs with standard solder footprint. The R2/R1 ratio of 4.7 ensures stable saturation under varying temperature conditions (−40 °C to +150 °C).

Key Specifications

Pinout & Package

SOT666 plastic surface-mount package: 6-lead, 0.5 mm pitch, 1.6 mm × 1.2 mm × 0.55 mm body height; designed for reflow soldering with standardized footprint per Figure 11.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-NPN resistor-equipped transistor applications.

Compared with PEMB9 and PEMD9, the PEMH9 provides symmetrical dual-NPN switching ideal for parallel load control, GPIO expansion, and logic buffering-where consistent sinking capability, low V_CE(sat), and matched gain across channels are essential.

Availability

PEMH9 is available at Aetrix Electronics and suitable for industrial control interfaces, portable instrumentation front-ends, and IoT sensor node designs requiring stable component supply, tight footprint constraints, and reduced assembly complexity.

Supply support for PEMH9 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified and industrial-grade components.

The PEMH9 belongs to Nexperia's Resistor-Equipped Transistor (RET) product line-designed specifically to replace discrete BJT-resistor combinations in digital logic, interface, and peripheral driver applications while minimizing PCB area and assembly cost.

FAQ

What is the maximum safe operating voltage for PEMH9?

The PEMH9 has an absolute maximum V_CEO of 50 V per transistor, verified per IEC 60134 limiting values. Operation above this voltage risks permanent breakdown. For reliable long-term use, design within 80% of rating (≤40 V) under worst-case temperature and transient conditions.

Can PEMH9 be used with 1.8 V logic inputs?

Yes-its VI(on) ranges from 0.8 V to 1.4 V and VI(off) from 0.5 V to 0.7 V at 25 °C, confirmed in Table 7. At 1.8 V, it achieves full saturation with margin; however, verify h_FE and V_CE(sat) at −40 °C and +100 °C if operating across full industrial temperature range.

Is thermal derating required for continuous 100 mA operation?

Yes-P_tot is 300 mW at T_amb ≤ 25 °C. At 100 mA and V_CE(sat) ≈ 0.1 V, power dissipation is ~10 mW per transistor (20 mW total), well below limit. But at higher V_CE (e.g., linear region), derating per Figure 1 must be applied-e.g., 150 mW max at 75 °C ambient.

How does the R2/R1 ratio affect switching performance?

The R2/R1 ratio of 4.7 sets feedback gain that stabilizes base current against β variation. A higher ratio improves noise immunity but increases turn-off time; lower ratio speeds turn-off but reduces saturation margin. This value balances speed, gain stability, and robustness across temperature per Nexperia's characterization in Figures 5–6.