NXP Semiconductors BAP64-05W,135

Overview

BAP64-05W from NXP Semiconductors is a silicon PIN diode in common-cathode dual configuration, housed in an SOT323 package. It delivers low diode capacitance (0.23–0.35 pF at VR = 20 V), low forward resistance (0.7–1.35 Ω at IF = 100 mA), and supports RF switching and attenuation up to 3 GHz in 50 Ω stripline circuits.

For engineers reviewing the BAP64-05W datasheet, BAP64-05W pinout, BAP64-05W application, or BAP64-05W equivalent, key selection criteria include reverse voltage rating (100 V), AEC-Q101 qualification, charge carrier lifetime (1.55 µs), series inductance (1.2 nH), and thermal resistance (250 K/W).

Technical Context

The BAP64-05W integrates two planar PIN diodes sharing a single cathode terminal, enabling compact series-shunt RF switch topologies. Its intrinsic layer design yields voltage-controlled RF resistance with minimal capacitance variation across 0–20 V reverse bias.

Operation relies on forward-bias current control of RF series resistance (rD) - ranging from 20 Ω at 0.5 mA to 0.7 Ω at 100 mA - while maintaining isolation >20 dB up to 3 GHz under zero bias. Charge carrier lifetime (1.55 µs) ensures fast switching suitable for TDD and pulse-modulated RF systems.

Key Specifications

Pinout & Package

SOT323 plastic surface-mounted package (3-lead, SC-70 compatible); dimensions: 2.2 × 1.35 × 0.95 mm (L × W × H), lead pitch 0.65 mm, solder point thermal interface.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RF PIN diode switching and attenuation applications.

Compared with BAR64-03W and MMBD640L, the BAP64-05W uniquely combines dual common-cathode topology, 100 V VR, AEC-Q101 qualification, and sub-0.35 pF capacitance - making it the only option for automotive-grade, compact, high-isolation RF switching where layout efficiency and reliability are critical.

Availability

BAP64-05W is available at Aetrix Electronics and suitable for RF attenuators and switches, automotive antenna diversity systems, and 5G front-end modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for BAP64-05W 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

NXP Semiconductors is a Dutch semiconductor company specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with leadership in RF power management and high-reliability analog components.

The BAP64-05W belongs to NXP's high-frequency PIN diode product line, engineered specifically for automotive-qualified RF switching, attenuation, and protection in 500 MHz–3 GHz wireless infrastructure and telematics systems.

FAQ

What is the maximum operating frequency supported by the BAP64-05W?

The BAP64-05W is characterized for operation up to 3 GHz, with typical isolation >20 dB and insertion loss <0.5 dB in 50 Ω stripline circuits at that frequency. Graphical data in Figure 3 and Figure 4 confirm stable RF performance through 3 GHz under zero- and forward-bias conditions.

Is the BAP64-05W suitable for automotive applications?

Yes, the BAP64-05W is AEC-Q101 qualified, meaning it has passed stress tests for temperature cycling, high-temperature reverse bias, and ESD robustness required for automotive under-hood and cabin RF modules. Its specification explicitly states automotive qualification in Section 1.2.

How does the common-cathode configuration of the BAP64-05W affect circuit design?

The common-cathode configuration allows both diodes to share a single RF ground return path, reducing PCB routing complexity and parasitic inductance in shunt-mode termination. It enables compact series-shunt SPDT switch layouts with only three external terminals - simplifying bias network design versus discrete dual-diode solutions.

What is the thermal resistance of the BAP64-05W and how does it impact power handling?

The BAP64-05W has a junction-to-solder-point thermal resistance (Rth(j-sp)) of 250 K/W. At its maximum total power dissipation of 240 mW, this results in a 60 K temperature rise above solder point - requiring adequate copper pour and thermal vias for sustained 100 mA forward current operation in enclosed environments.

Can the BAP64-05W be used in RF attenuator designs, and what bias current range is recommended?

Yes, the BAP64-05W is explicitly designed for RF attenuators, with forward resistance (rD) varying from 20 Ω at 0.5 mA to 0.7 Ω at 100 mA. For precision analog attenuation, bias currents between 1 mA and 10 mA provide optimal linearity and repeatability, as shown in Figure 2 and Table 7.