PEMI8QFN/LE,132 RC (Pi) EMI Filter Equivalent & Substitute Parts

Part Overview

The PEMI8QFN/LE,132 is a 2nd order RC (Pi) EMI filter manufactured by NXP Semiconductors, designed for low-pass filtering applications in LAN, PCS, and WAN systems. This 8-channel filter features 65 Ohms resistance per channel and 8.5 pF total capacitance, providing 11 dB attenuation across the 800 MHz to 3 GHz frequency range. The component is housed in a 16-XFDFN exposed pad surface mount package with integrated ESD protection.

The PEMI8QFN/LE,132 has reached obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Substiute Parts

PEMI8QFN/LE,132

NXP SemiconductorsIn Stock: 852PEMI8QFN/LE,132 Datasheet

Current PartRFQ

IP4252CZ16-8-TTL,1

Nexperia USA Inc.In Stock: 79817IP4252CZ16-8-TTL,1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of RC (Pi) EMI filters is determined by the following critical parameters:

• Filter topology and order: Both parts must be 2nd order RC (Pi) low-pass filters
• Number of channels: Both parts must provide 8 independent filter channels
• Frequency response characteristics: Attenuation performance across the 800 MHz to 3 GHz band
• Resistance and capacitance values: Electrical parameters that define the filter cutoff frequency and impedance matching
• Package compatibility: Physical dimensions and pin configuration must accommodate existing PCB layouts
• ESD protection: Both parts include integrated ESD protection
• Operating temperature range: Both parts support −40°C to +85°C operation
• Regulatory compliance: RoHS3 and REACH compliance status

The IP4252CZ16-8-TTL,1 manufactured by Nexperia USA Inc. qualifies as a substitute based on matching filter topology, channel count, operating temperature range, ESD protection, and regulatory compliance. Electrical parameter variations (40 Ohms vs. 65 Ohms resistance; 12 pF vs. 8.5 pF capacitance) result in different attenuation characteristics (12 dB vs. 11 dB) and must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The IP4252CZ16-8-TTL,1 is an active product with established supply availability (79,794 units in stock), making it suitable for new designs and production continuity. Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for current manufacturing standards.

The primary engineering consideration is the electrical parameter difference: the IP4252CZ16-8-TTL,1 provides higher attenuation (12 dB vs. 11 dB) due to lower resistance (40 Ohms vs. 65 Ohms) and higher capacitance (12 pF vs. 8.5 pF). This results in a lower cutoff frequency and stronger filtering performance. Applications requiring the specific impedance and frequency response of the original PEMI8QFN/LE,132 must account for these differences in signal path design.

Package dimensions differ slightly (width: 1.20 mm vs. 1.35 mm; height: 0.50 mm vs. 0.55 mm), requiring PCB layout verification to confirm physical compatibility with existing footprints.

Frequently Asked Questions (FAQ)

Q: Can the IP4252CZ16-8-TTL,1 be used as a direct drop-in replacement for the PEMI8QFN/LE,132?

A: Physical compatibility requires PCB layout verification due to package dimension differences (1.20 mm vs. 1.35 mm width; 0.50 mm vs. 0.55 mm height). Electrical compatibility depends on application tolerance for the different resistance, capacitance, and attenuation values. Both parts share the same pin count (16) and exposed pad configuration.

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

A: The IP4252CZ16-8-TTL,1 has lower resistance (40 Ohms vs. 65 Ohms) and higher capacitance (12 pF vs. 8.5 pF), resulting in a lower cutoff frequency and higher attenuation (12 dB vs. 11 dB). This provides stronger filtering but may alter impedance matching in the signal path. Application-specific signal integrity analysis is required.

Q: Are both parts suitable for LAN and WAN applications?

A: Both parts support LAN and WAN applications. The PEMI8QFN/LE,132 also lists PCS applications. The IP4252CZ16-8-TTL,1 is specified for LAN and WAN. Application requirements should determine suitability.

Q: What is the difference between the XFDFN and UFDFN package types?

A: Both are 16-pin fine-pitch dual flat no-lead packages with exposed pads. The UFDFN (IP4252CZ16-8-TTL,1) has slightly larger dimensions (1.35 mm width vs. 1.20 mm; 0.55 mm height vs. 0.50 mm) compared to the XFDFN (PEMI8QFN/LE,132). Pin pitch and electrical performance are equivalent; physical PCB footprint compatibility must be confirmed.

Q: Do both parts include ESD protection?

A: Yes, both the PEMI8QFN/LE,132 and IP4252CZ16-8-TTL,1 include integrated ESD protection.

Q: What is the product status difference, and why does it matter?

A: The PEMI8QFN/LE,132 is obsolete, while the IP4252CZ16-8-TTL,1 is active. Active product status ensures ongoing manufacturing, supply chain availability, and technical support. The IP4252CZ16-8-TTL,1 is recommended for new designs and long-term production requirements.