CPPFXC4LT-A7BR-20.0PD Equivalent & Substitute Parts

Part Overview

The CPPFXC4LT-A7BR-20.0PD is a 20 MHz XO (Standard) CMOS oscillator manufactured by Cardinal Components Inc., designed for applications requiring a 3.3V standby power-down function in a through-hole 8-DIP package. This part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations.

Substiute Parts

CPPFXC4LT-A7BR-20.0PD

Cardinal Components Inc.In Stock: 795CPPFXC4LT-A7BR-20.0PD Datasheet

Current PartRFQ

MXO45HSLV-3I-20M000000

CTS-Frequency ControlsIn Stock: 816MXO45HSLV-3I-20M000000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CPPFXC4LT-A7BR-20.0PD is determined by the following critical parameters:

• Frequency Match: 20 MHz (exact match required)
• Supply Voltage: 3.3V (exact match required)
• Standby Function: Power Down capability (required)
• Mounting Type: Through Hole (required for PCB compatibility)
• Package Footprint: 8-DIP, 4 Leads with compatible physical dimensions (required)
• Operating Temperature Range: -40°C ~ 85°C (minimum requirement)
• Output Logic Level: CMOS or HCMOS/TTL compatible (acceptable variation)

The MXO45HSLV-3I-20M000000 meets all critical substitution criteria. While it specifies HCMOS/TTL output versus CMOS, both are compatible logic families for 3.3V applications. The frequency stability specification differs (±50ppm vs. ±25ppm), representing a relaxation of the original tolerance. Physical dimensions and thermal characteristics remain within acceptable parameters.

Parameter Comparison

Engineering Selection Recommendations

The MXO45HSLV-3I-20M000000 is an active product with current manufacturing support, whereas the CPPFXC4LT-A7BR-20.0PD is obsolete. Both parts maintain RoHS compliance and identical moisture sensitivity ratings. The substitute part demonstrates improved power efficiency in disable mode (10µA vs. 50µA) and lower active supply current (17mA vs. 25mA). Physical footprint compatibility is confirmed through matching lateral dimensions and acceptable height variation (6.10mm vs. 6.50mm). The relaxed frequency stability specification (±50ppm vs. ±25ppm) should be evaluated against application timing requirements.

Frequently Asked Questions (FAQ)

Q: Can the MXO45HSLV-3I-20M000000 directly replace the CPPFXC4LT-A7BR-20.0PD on existing PCBs?

A: Yes. Both parts share identical lateral dimensions (0.520" x 0.520"), 8-DIP through-hole footprints with 4 leads, and compatible pin configurations. The height difference (6.10mm vs. 6.50mm) does not affect PCB assembly or clearance.

Q: What is the difference between CMOS and HCMOS/TTL output specifications?

A: HCMOS (High-speed CMOS) and TTL are logic families compatible with 3.3V systems. HCMOS provides improved noise immunity and speed characteristics compared to standard CMOS. Both are suitable for 3.3V applications and will interface correctly with standard digital logic circuits.

Q: Does the frequency stability difference affect system performance?

A: The substitute part specifies ±50ppm versus the original ±25ppm. This represents a relaxation of tolerance. Applications requiring frequency stability tighter than ±50ppm should be re-evaluated for compatibility.

Q: Are there compliance differences between the two parts?

A: Both parts are RoHS compliant. The substitute achieves ROHS3 compliance, representing current regulatory alignment. Both maintain MSL 1 (Unlimited) moisture sensitivity ratings.

Q: What are the power consumption implications of substitution?

A: The MXO45HSLV-3I-20M000000 consumes less power in both active (17mA vs. 25mA) and disable modes (10µA vs. 50µA), providing improved efficiency for battery-powered or power-constrained applications.