NXP Semiconductors PEMB18,115

Overview

PEMB18 from Nexperia is a dual PNP resistor-equipped transistor (RET) in SOT666 package, configured as two independent PNP transistors with integrated bias resistors R₁ = 4.7 kΩ and R₂ = 10 kΩ. It delivers −100 mA output current per transistor, supports −50 V collector-emitter voltage, and is AEC-Q101 qualified for automotive signal conditioning and digital logic interface applications.

For engineers reviewing the PEMB18 datasheet, PEMB18 pinout, PEMB18 application, or PEMB18 equivalent, this device serves as a space- and cost-optimized replacement for discrete PNP pairs in level-shifting, LED driver enable control, and microcontroller I/O buffering where built-in biasing eliminates external resistors and reduces PCB footprint.

Technical Context

The PEMB18 integrates two matched PNP transistors sharing no internal connection-each has its own base bias network (R₁ to base, R₂ from base to emitter), enabling independent switching with guaranteed VI(on) ≤ −1.5 V at IC = −20 mA and VI(off) ≥ −0.9 V at IC = −100 µA. Its hFE ≥ 50 at IC = −10 mA ensures reliable saturation under standard logic drive conditions.

Thermal design is supported by a per-device total power dissipation of 300 mW at Tamb ≤ 25 °C and Rth(j-a) = 417 K/W on FR4 PCB, while fT = 180 MHz enables stable operation in high-speed digital switching up to ~10 MHz edge rates without oscillation.

Key Specifications

Pinout & Package

SOT666 ultra-small flat-lead surface-mount package (1.7 mm × 1.5 mm × 0.6 mm), 6-pin, lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PUMB18, PEMB18 offers identical performance in a larger SOT666 package better suited for manual rework and thermal management in higher-power clusters; versus EMZ7T2R, it provides guaranteed automotive qualification, PNP sourcing capability, and tighter R₂/R₁ ratio control for precise VI thresholds.

Availability

PEMB18 is available at Aetrix Electronics and suitable for automotive door modules, industrial PLC input stages, consumer appliance backlight drivers, and medical infusion pump motor enable circuits requiring stable component supply across multi-year production cycles.

Supply support for PEMB18 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 leader in high-performance discrete, logic, and PowerMOS semiconductors, spun out from NXP in 2017 and headquartered in Nijmegen, Netherlands.

The PEMB18 belongs to Nexperia's Resistor-Equipped Transistor (RET) product line, engineered specifically to reduce component count and improve reliability in automotive signal interface and industrial digital I/O applications.

FAQ

What is the maximum allowable junction temperature for PEMB18 during continuous operation?

The absolute maximum junction temperature (T_j) is 150 °C, as specified in Table 6 of the datasheet. Operation above this limit risks permanent parametric shift or bond wire failure. Derating begins at Tamb > 25 °C per Figure 1, with P_tot reduced linearly to zero at 150 °C junction temperature using R_th(j-a) = 417 K/W for the device.

Can PEMB18 be used in a common-emitter configuration with shared emitter pins?

No-Pins 1 and 4 are physically separate emitter terminals with no internal connection. They must be wired independently. Sharing emitters would require external wiring and defeats the isolation benefit; for true common-emitter dual-PNP operation, a single-package alternative like PBSS4041T (dual PNP with shared emitter) should be evaluated instead.

Is wave soldering recommended for PEMB18 in SOT666 package?

No-reflow soldering is the only recommended method per Section 11 of the datasheet. Wave soldering is not qualified for SOT666 and may cause tombstoning, solder bridging, or thermal damage due to asymmetric heating. For through-hole prototyping, use SOT666-to-DIP adapter boards with hand-soldering.

How does the R₂/R₁ ratio affect switching behavior in digital logic applications?

The R₂/R₁ ratio of 2.1 ±21% sets the internal base current division, directly determining the VI(on) and VI(off) thresholds. A higher ratio increases base current for a given input voltage, lowering VI(on) and improving noise immunity-but also raises standby current. This ratio is trimmed during manufacturing to ensure consistent logic-level compatibility across temperature and process variation.