CPPFXC8LT-A7BD-25.0TS Equivalent & Substitute Parts

Part Overview

The CPPFXC8LT-A7BD-25.0TS is a 25 MHz XO (Standard) CMOS oscillator manufactured by Cardinal Components Inc., designed for applications requiring a crystal-based frequency reference with enable/disable functionality. Operating at 3.3V supply voltage, this surface mount component delivers a stable 25.0000 MHz output with ±20ppm frequency stability across the -40°C to 85°C temperature range.

This part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. The substitute identified maintains functional compatibility while offering improved product status and availability.

Key Parameters

Parameter	Value
Frequency	25.0000 MHz
Output Type	CMOS
Supply Voltage	3.3V
Function	Enable/Disable
Frequency Stability	±20ppm
Operating Temperature Range	-40°C ~ 85°C
Mounting Type	Surface Mount
Package Type	4-SOJ
Current Supply (Max)	25mA
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

The ECS-8FA3X-250-TR qualifies as a functional substitute based on the following critical parameters:

Frequency Match: Both parts operate at 25.0000 MHz
Output Compatibility: Both deliver CMOS-level output signals
Supply Voltage: Both require 3.3V supply
Enable/Disable Function: Both incorporate enable/disable control capability
Operating Temperature Range: Both support -40°C to 85°C operation
Mounting Configuration: Both use surface mount technology with 4-SOJ package type
Base Resonator: Both utilize crystal-based resonators

The primary differences lie in package pitch (7.62mm vs. 5.08mm), frequency stability specification (±20ppm vs. ±200ppm), and current consumption characteristics. These differences require evaluation based on specific application requirements.

Parameter Comparison

Parameter	CPPFXC8LT-A7BD-25.0TS	ECS-8FA3X-250-TR
Manufacturer	Cardinal Components Inc.	ECS Inc.
Frequency	25.0000 MHz	25.0000 MHz
Output Type	CMOS	CMOS
Supply Voltage	3.3V	3.3V
Function	Enable/Disable	Enable/Disable
Frequency Stability	±20ppm	±200ppm
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount
Package / Case	4-SOJ, 7.62mm pitch	4-SOJ, 5.08mm pitch
Size (L x W)	14.50mm x 8.80mm	14.00mm x 8.65mm
Height (Max)	4.70mm	4.70mm
Current Supply (Max)	25mA	9mA
Current Supply (Disable)	50µA	Not specified
Product Status	Obsolete	Active
RoHS Status	RoHS Compliant	ROHS3 Compliant
MSL Rating	2 (1 Year)	1 (Unlimited)
Packaging	Bulk	Tape & Reel (TR)

Engineering Selection Recommendations

The ECS-8FA3X-250-TR is an active product with current manufacturing support, making it suitable for new designs and ongoing production requirements where the CPPFXC8LT-A7BD-25.0TS is no longer available.

Compliance Considerations: The ECS-8FA3X-250-TR meets ROHS3 compliance with REACH unaffected status, providing enhanced regulatory alignment compared to the obsolete Cardinal Components part. The MSL rating of 1 (Unlimited) offers superior moisture handling characteristics versus the MSL 2 (1 Year) rating of the original part.

Application Fit: Selection between these parts depends on frequency stability requirements. The CPPFXC8LT-A7BD-25.0TS provides ±20ppm stability, while the ECS-8FA3X-250-TR provides ±200ppm stability. Applications requiring tighter frequency tolerance must account for this 10x difference in stability specification.

Physical Integration: The package pitch difference (7.62mm vs. 5.08mm) requires PCB layout modification. The ECS substitute is slightly smaller in footprint dimensions, which may require circuit board redesign for mechanical compatibility.

Power Consumption: The ECS-8FA3X-250-TR draws 9mA maximum supply current compared to 25mA for the Cardinal part, representing a 64% reduction in active current consumption.

Frequently Asked Questions (FAQ)

Q: Can the ECS-8FA3X-250-TR directly replace the CPPFXC8LT-A7BD-25.0TS without PCB modification?

A: Direct pin-for-pin replacement is not possible due to package pitch differences (7.62mm vs. 5.08mm). PCB layout modification is required to accommodate the different lead spacing of the 4-SOJ package.

Q: What is the impact of the frequency stability difference between ±20ppm and ±200ppm?

A: Frequency stability determines long-term frequency accuracy across temperature and aging. Applications with strict frequency tolerance requirements must evaluate whether ±200ppm stability meets system specifications. The 10x difference in stability may be acceptable for general timing applications but may not suit precision frequency reference applications.

Q: Are both parts compatible with existing 3.3V supply circuits?

A: Yes. Both parts operate at 3.3V supply voltage and are compatible with standard 3.3V logic circuits. The enable/disable function operates identically on both parts.

Q: What are the moisture sensitivity implications of the MSL rating difference?

A: The CPPFXC8LT-A7BD-25.0TS carries MSL 2 (1 Year), requiring controlled storage and handling within one year of moisture exposure. The ECS-8FA3X-250-TR carries MSL 1 (Unlimited), eliminating time-based moisture sensitivity constraints and simplifying inventory management.

Q: Does the lower current consumption of the ECS part affect circuit performance?

A: The 9mA maximum supply current of the ECS-8FA3X-250-TR versus 25mA for the Cardinal part represents improved power efficiency. This reduction does not affect output signal quality or frequency accuracy; it reflects more efficient internal circuit design.

Q: Are both parts RoHS compliant?

A: Yes. The CPPFXC8LT-A7BD-25.0TS is RoHS Compliant. The ECS-8FA3X-250-TR is ROHS3 Compliant, representing a more current compliance standard.

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