FN4000153 40 MHz CMOS Oscillator Equivalent & Substitute Parts

Part Overview

The FN4000153 is a 40 MHz XO (Standard) CMOS oscillator manufactured by Diodes Incorporated, part of the SaRonix-eCera™ FN series. This surface mount crystal oscillator operates at 3.3V with enable/disable functionality and is designed for applications requiring stable frequency generation in a compact 4-SMD, No Lead package. The part is currently active in production with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified based on matching electrical specifications, mechanical compatibility, and operational parameters.

Key Parameters

Parameter	Value
Frequency	40 MHz
Output Type	CMOS
Supply Voltage	3.3V
Function	Enable/Disable
Package Type	4-SMD, No Lead
Mounting Type	Surface Mount
Operating Temperature Range	-20°C ~ 70°C
Maximum Supply Current	25mA
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the FN4000153 are qualified based on the following critical parameters:

Frequency Match: 40 MHz (exact)
Output Configuration: CMOS output
Supply Voltage: 3.3V
Package Compatibility: 4-SMD, No Lead form factor
Mounting Method: Surface Mount
Operating Temperature Range: -20°C ~ 70°C minimum coverage
Maximum Supply Current: 25mA or lower
Enable/Disable Function: Required
Compliance: ROHS3 Compliant

The FN4000157 (Diodes Incorporated) and SXO75C3C271-40.000M (Suntsu Electronics) meet all critical electrical and mechanical parameters, making them direct functional equivalents for the FN4000153.

Parameter Comparison

Parameter	FN4000153	FN4000157	SXO75C3C271-40.000M
Manufacturer	Diodes Incorporated	Diodes Incorporated	Suntsu Electronics, Inc.
Frequency	40 MHz	40 MHz	40 MHz
Output Type	CMOS	CMOS	CMOS
Supply Voltage	3.3V	3.3V	3.3V
Function	Enable/Disable	Enable/Disable	Enable/Disable
Frequency Stability	±25ppm	±50ppm	±25ppm
Operating Temperature	-20°C ~ 70°C	-20°C ~ 70°C	-20°C ~ 70°C
Maximum Supply Current	25mA	25mA	25mA
Package / Case	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead
Size / Dimension	7.00mm x 5.00mm	7.00mm x 5.00mm	7.00mm x 5.00mm
Height - Seated (Max)	1.80mm	1.80mm	1.60mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Not specified

Engineering Selection Recommendations

FN4000157 (Diodes Incorporated): This part is the manufacturer-recommended equivalent from Diodes Incorporated. It maintains identical electrical and mechanical specifications to the FN4000153 with the exception of frequency stability (±50ppm versus ±25ppm). Both parts carry ROHS3 compliance and MSL 1 rating. Selection of FN4000157 is appropriate when frequency stability tolerance of ±50ppm is acceptable for the application.

SXO75C3C271-40.000M (Suntsu Electronics): This cross-manufacturer substitute provides equivalent performance with matching frequency stability (±25ppm) and all critical electrical parameters. The seated height is 1.60mm compared to 1.80mm for the Diodes parts, which may be advantageous for space-constrained applications. ROHS3 compliance is confirmed. This part is suitable for direct substitution where multi-source qualification is required.

All three parts are active products with current production status and established supply availability.

Frequently Asked Questions (FAQ)

Q: Can FN4000157 be used as a direct replacement for FN4000153?

A: Yes. Both parts are manufactured by Diodes Incorporated and share identical electrical output, supply voltage, frequency, package type, and operating temperature range. The frequency stability specification differs (±50ppm versus ±25ppm); verify that your application tolerates this variance before substitution.

Q: Is SXO75C3C271-40.000M compatible with FN4000153 in the same PCB layout?

A: Yes. The SXO75C3C271-40.000M matches the FN4000153 in footprint (7.00mm x 5.00mm), package type (4-SMD, No Lead), and all electrical specifications. The seated height is 1.60mm versus 1.80mm; confirm clearance in your assembly design.

Q: What are the key parameters that determine substitutability?

A: Frequency (40 MHz), output type (CMOS), supply voltage (3.3V), enable/disable function, package type (4-SMD, No Lead), operating temperature range (-20°C ~ 70°C), and maximum supply current (25mA) are the critical parameters. All qualified substitutes match these specifications.

Q: Does frequency stability affect part selection?

A: Frequency stability is application-dependent. The FN4000153 and SXO75C3C271-40.000M specify ±25ppm, while FN4000157 specifies ±50ppm. Select based on your system's frequency tolerance requirements.

Q: Are all three parts RoHS compliant?

A: Yes. FN4000153, FN4000157, and SXO75C3C271-40.000M are all ROHS3 compliant.

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