PEMI2STD/CK,115 RC (Pi) EMI Filter Equivalent & Substitute Parts

Part Overview

The PEMI2STD/CK,115 is a 2nd order RC (Pi) EMI filter manufactured by NXP USA Inc., designed for data line filtering in mobile device applications. This component features a 20 Ohm resistance per channel with 14.6 pF total capacitance and is housed in a SOT-665 surface mount package. The product is currently obsolete, necessitating identification of functionally compatible alternatives that maintain electrical and mechanical compatibility for continued system support and new design implementations.

Substiute Parts

PEMI2STD/CK,115

NXP USA Inc.In Stock: 793PEMI2STD/CK,115 Datasheet

Current PartRFQ

IP4256CZ5-W,115

Nexperia USA Inc.In Stock: 1008IP4256CZ5-W,115 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PEMI2STD/CK,115 is determined by the following mandatory parameters:

Electrical Compatibility Requirements:

• Filter technology: RC (Pi) topology
• Filter order: 2nd order low pass
• Number of channels: 2
• ESD protection: Present
• Operating temperature range: Minimum -40°C to 85°C coverage

Mechanical Compatibility Requirements:

• Package type: SOT-665
• Mounting type: Surface mount
• Physical dimensions: 1.60 mm L × 1.20 mm W × 0.60 mm H

Compliance Requirements:

• RoHS3 compliance
• MSL rating: 1 or better

The resistance and capacitance values may vary within the RC (Pi) filter family while maintaining functional compatibility, as these parameters determine the specific cutoff frequency and attenuation characteristics appropriate for different signal line applications. Substitutes must preserve the core topology, channel count, package footprint, and environmental specifications.

Parameter Comparison

Engineering Selection Recommendations

The IP4256CZ5-W,115 is an active substitute for the obsolete PEMI2STD/CK,115. Both components share identical mechanical compatibility through the SOT-665 package and matching physical dimensions, enabling direct footprint replacement on PCB assemblies. Both parts maintain full RoHS3 compliance and unlimited moisture sensitivity level rating, ensuring equivalent environmental and regulatory performance.

The primary electrical difference lies in the resistance and capacitance values: the substitute features 100 Ohm resistance per channel and 19 pF total capacitance compared to the original 20 Ohm and 14.6 pF specifications. This results in different cutoff frequency and attenuation characteristics. The substitute is specified for LAN and WAN applications with 20 dB attenuation across the 800 MHz to 3 GHz frequency band, whereas the original part was designated for mobile device data line filtering.

Selection between these parts depends on the specific frequency response and attenuation requirements of the target application. Both maintain the 2-channel RC (Pi) topology, 2nd order low pass filtering, and ESD protection across the identical -40°C to 85°C operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can the IP4256CZ5-W,115 be used as a direct replacement for PEMI2STD/CK,115 in existing designs?

A: Physical and mechanical compatibility is confirmed through identical SOT-665 packaging and dimensions. However, the different resistance (100 Ohm vs. 20 Ohm) and capacitance (19 pF vs. 14.6 pF) values produce different electrical filtering characteristics. Application compatibility depends on whether the target circuit can tolerate the altered cutoff frequency and attenuation profile of the substitute part.

Q: Are both parts suitable for the same operating environment?

A: Yes. Both components operate across -40°C to 85°C, maintain ROHS3 compliance, and carry MSL rating 1 (unlimited moisture sensitivity). Environmental and regulatory specifications are equivalent.

Q: What is the significance of the different resistance and capacitance values?

A: In RC (Pi) filter topology, resistance and capacitance values determine the cutoff frequency and attenuation slope. The PEMI2STD/CK,115 with lower resistance and capacitance values produces a higher cutoff frequency compared to the IP4256CZ5-W,115. The substitute's higher values shift the cutoff frequency lower, affecting which frequency bands receive filtering. Application requirements must be evaluated to determine which filtering characteristic is appropriate.

Q: Are there any packaging or handling differences between these parts?

A: Both components use SOT-665 surface mount packaging with identical physical dimensions and MSL rating 1. Packaging and handling procedures are equivalent.

Q: Why is the original part obsolete?

A: Product obsolescence is determined by the manufacturer. The active substitute IP4256CZ5-W,115 from Nexperia USA Inc. represents the current available option within the RC (Pi) EMI filter family for 2-channel, 2nd order low pass applications in SOT-665 packaging.