SIT8225AI-3F-33E-25.000000T Equivalent & Substitute Parts

Part Overview

The SIT8225AI-3F-33E-25.000000T is a 25 MHz MEMS oscillator manufactured by SiTime, configured as an XO (Standard) with LVCMOS/LVTTL output and 3.3V supply voltage. This component features Enable/Disable functionality in a 4-SMD, No Lead surface mount package. The part is classified as Not For New Designs, making identification of active equivalent alternatives essential for ongoing production and new design implementations.

Key Parameters

Parameter	Value
Manufacturer Part Number	SIT8225AI-3F-33E-25.000000T
Manufacturer	SiTime
Series	SiT8225
Frequency	25 MHz
Output Type	LVCMOS, LVTTL
Supply Voltage	3.3V
Frequency Stability	±10ppm
Operating Temperature Range	-40°C ~ 85°C
Package Type	4-SMD, No Lead
Package Dimensions	0.197" L x 0.126" W (5.00mm x 3.20mm)
Height - Seated (Max)	0.031" (0.80mm)
Current - Supply (Max)	33mA
Current - Supply (Disable) (Max)	31mA
Function	Enable/Disable
Base Resonator	MEMS
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Not For New Designs

Substitute Part Grouping Explanation

Substitution eligibility for the SIT8225AI-3F-33E-25.000000T is determined by the following critical parameters:

Frequency: 25 MHz (exact match required)
Output Type: LVCMOS, LVTTL (exact match required)
Supply Voltage: 3.3V (exact match required)
Frequency Stability: ±10ppm (exact match required)
Operating Temperature Range: -40°C ~ 85°C (exact match required)
Package Type: 4-SMD, No Lead (exact match required)
Package Dimensions: 0.197" L x 0.126" W / 5.00mm x 3.20mm (exact match required)
Height - Seated (Max): 0.031" (0.80mm) (exact match required)
Current - Supply (Max): 33mA (exact match required)
Current - Supply (Disable) (Max): 31mA (exact match required)
Function: Enable/Disable (exact match required)
Base Resonator: MEMS (exact match required)

The identified substitute parts meet all electrical and mechanical parameters specified above. Substitutes differ only in series designation and product status classification.

Parameter Comparison

Parameter	SIT8225AI-3F-33E-25.000000T	SIT8208AI-3F-33E-25.000000T	SIT8208AI-3F-33E-25.000000Y
Manufacturer	SiTime	SiTime	SiTime
Frequency	25 MHz	25 MHz	25 MHz
Output Type	LVCMOS, LVTTL	LVCMOS, LVTTL	LVCMOS, LVTTL
Supply Voltage	3.3V	3.3V	3.3V
Frequency Stability	±10ppm	±10ppm	±10ppm
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead
Package Dimensions	0.197" L x 0.126" W (5.00mm x 3.20mm)	0.197" L x 0.126" W (5.00mm x 3.20mm)	0.197" L x 0.126" W (5.00mm x 3.20mm)
Height - Seated (Max)	0.031" (0.80mm)	0.031" (0.80mm)	0.031" (0.80mm)
Current - Supply (Max)	33mA	33mA	33mA
Current - Supply (Disable) (Max)	31mA	31mA	31mA
Function	Enable/Disable	Enable/Disable	Enable/Disable
Base Resonator	MEMS	MEMS	MEMS
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Not For New Designs	Active	Active

Engineering Selection Recommendations

Both SIT8208AI-3F-33E-25.000000T and SIT8208AI-3F-33E-25.000000Y are direct electrical and mechanical equivalents to the SIT8225AI-3F-33E-25.000000T. The primary distinction is product status: the SIT8225 series is classified as Not For New Designs, while both SIT8208 variants are Active products.

For new design implementations, the SIT8208 series is the appropriate selection. Both SIT8208 variants maintain identical electrical specifications, package geometry, and compliance certifications (ROHS3 Compliant, REACH Unaffected). The difference between SIT8208AI-3F-33E-25.000000T and SIT8208AI-3F-33E-25.000000Y is limited to packaging designation (T vs. Y suffix), with both meeting the same electrical and mechanical requirements.

For legacy system maintenance or production continuation of existing designs using the SIT8225 series, either SIT8208 variant provides full functional and physical compatibility.

Frequently Asked Questions (FAQ)

Q: Can SIT8208AI-3F-33E-25.000000T and SIT8208AI-3F-33E-25.000000Y be used interchangeably with SIT8225AI-3F-33E-25.000000T?

A: Yes. Both SIT8208 variants are electrically and mechanically equivalent. All critical parameters including frequency, output type, supply voltage, frequency stability, operating temperature range, package type, dimensions, and current specifications are identical.

Q: What is the difference between the T and Y packaging designations?

A: The T and Y suffixes indicate different packaging or tape configurations. Both variants meet the same electrical and mechanical specifications for this oscillator application.

Q: Why is the SIT8225 series marked as Not For New Designs?

A: The SIT8225 series has been superseded by the SIT8208 series. SiTime recommends using the active SIT8208 series for new design implementations while maintaining support for existing SIT8225-based systems.

Q: Are there any compliance or certification differences between these parts?

A: No. All three parts are ROHS3 Compliant, REACH Unaffected, and carry identical Moisture Sensitivity Level (MSL) ratings of 1 (Unlimited).

Q: Can these oscillators be used in applications requiring different operating temperatures?

A: No. All three parts are specified for -40°C ~ 85°C operation. Applications requiring different temperature ranges require alternative part selection.

Q: Are the package dimensions identical for all three parts?

A: Yes. All three parts use the same 4-SMD, No Lead package with dimensions of 0.197" L x 0.126" W (5.00mm x 3.20mm) and maximum seated height of 0.031" (0.80mm).

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