NXP Semiconductors BAP64-05,215

Overview

BAP64-05 from NXP Semiconductors is a dual silicon PIN diode in common-cathode configuration housed in an SOT23 surface-mount package. It delivers 0.52 pF typical capacitance at 0 V reverse bias, 0.7 Ω typical forward resistance at 100 mA, and supports RF operation up to 3 GHz - used as a voltage-controlled RF resistor in high-frequency attenuators and switches.

For engineers reviewing the BAP64-05 datasheet, BAP64-05 pinout, BAP64-05 application, or BAP64-05 equivalent, key selection criteria include its dual-anode/common-cathode topology, AEC-Q101 qualification for automotive environments, low series inductance (1.4 nH), and specified isolation performance above −25 dB at 2 GHz.

Technical Context

The BAP64-05 integrates two independent PIN diodes sharing a single cathode terminal, enabling compact series-shunt switching or balanced attenuator topologies. Its intrinsic layer enables linear RF resistance control via DC bias current, with charge carrier lifetime of 1.55 µs supporting fast switching between RF-on and RF-off states.

Thermal resistance from junction to solder point is 220 K/W, and it operates across −65 °C to +150 °C junction temperature. Reverse voltage rating is 175 V per diode, forward current limit is 100 mA, and total power dissipation is rated at 250 mW at solder-point temperature ≤90 °C.

Key Specifications

Pinout & Package

SOT23 plastic surface-mounted package (TO-236AB) with 3 leads; dimensions per Figure 5: body size 2.9 × 1.3 × 1.0 mm, lead pitch 0.95 mm, thermal pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BAR64-03W, BAP64-05 offers integrated dual-anode functionality and lower rD; compared with MMBAP64-05, it shares identical electrical behavior but differs only in branding and distribution channel - making MMBAP64-05 a drop-in alternative while BAR64-03W requires circuit redesign.

Availability

BAP64-05 is available at Aetrix Electronics and suitable for RF attenuators and switches, automotive radar front-ends, and cellular base station tuning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BAP64-05 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 global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The BAP64-05 belongs to NXP's high-frequency discrete diode product line, engineered specifically for RF signal conditioning in automotive radar, wireless infrastructure, and precision test equipment where low capacitance, fast switching, and AEC-Q101 reliability are mandatory.

FAQ

What is the maximum reverse voltage rating for each diode in the BAP64-05?

The BAP64-05 has a maximum reverse voltage rating of 175 V per diode, as specified in Table 4 (Limiting Values) of the official NXP datasheet Rev. 6.2. This rating applies individually to each PIN diode section and must not be exceeded to avoid permanent junction damage. The BAP64-05 maintains this rating across its full operating temperature range.

Is the BAP64-05 suitable for automotive applications?

Yes, the BAP64-05 is AEC-Q101 qualified, confirming compliance with stress-test requirements for automotive-grade discrete semiconductors. It is explicitly rated for operation from −65 °C to +150 °C junction temperature and is used in automotive radar front-ends and infotainment RF modules. The BAP64-05 meets qualification standards for temperature cycling, humidity bias, and mechanical shock relevant to under-hood deployment.

How does the common-cathode configuration of the BAP64-05 affect PCB layout?

The common-cathode configuration of the BAP64-05 simplifies bias network design by requiring only one cathode connection for both diodes, reducing trace count and parasitic inductance in RF paths. Pin 3 serves as the shared cathode terminal, while Pins 1 and 2 are isolated anodes - enabling compact series-shunt switch layouts without external node tying. This topology directly supports standard RF T/R switch footprints in SOT23.

What is the typical forward resistance of the BAP64-05 at 10 mA bias current?

The BAP64-05 exhibits a typical forward resistance (rD) of 10 Ω at 10 mA forward current, as shown in Table 6 (Characteristics) and confirmed by Figure 2 (rD vs. IF). This value is measured at 100 MHz and 25 °C junction temperature. At higher currents (e.g., 100 mA), rD drops to 0.7 Ω, enabling low-loss RF conduction in switched-on states.

Does the BAP64-05 require external DC blocking capacitors in RF signal paths?

No, the BAP64-05 does not require external DC blocking capacitors in standard RF series-switch configurations because its intrinsic layer inherently blocks DC while passing RF. However, when used in shunt configurations or with shared bias lines, external RF chokes or bias tees are needed to isolate DC control from the RF path - as demonstrated in NXP application notes for attenuator designs using the BAP64-05.