SIT8225AI-2F-18E-25.000000Y Equivalent & Substitute Parts

Part Overview

The SIT8225AI-2F-18E-25.000000Y is a 25 MHz XO (Standard) LVCMOS/LVTTL oscillator manufactured by SiTime, featuring 1.8V supply with Enable/Disable functionality in a 4-SMD, No Lead package. This part is classified as Not For New Designs, indicating it has been superseded in the product lifecycle. Identifying equivalent substitute parts is necessary for ongoing production support, legacy system maintenance, and design continuity where this oscillator frequency and electrical characteristics are required.

Key Parameters

Parameter	Value
Manufacturer Part Number	SIT8225AI-2F-18E-25.000000Y
Manufacturer	SiTime
Series	SiT8225
Frequency	25 MHz
Output Type	LVCMOS, LVTTL
Supply Voltage	1.8V
Frequency Stability	±10ppm
Operating Temperature Range	-40°C to 85°C
Function	Enable/Disable
Package Type	4-SMD, No Lead
Package Dimensions	3.20mm x 2.50mm (0.126" L x 0.098" W)
Height - Seated (Max)	0.80mm (0.031")
Current - Supply (Max)	31mA
Current - Supply (Disable) (Max)	30mA
Base Resonator	MEMS
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
Product Status	Not For New Designs

Substitute Part Grouping Explanation

Substitute parts for the SIT8225AI-2F-18E-25.000000Y are identified based on electrical and mechanical parameter equivalence. The critical parameters determining substitutability are:

Frequency: 25 MHz
Output Type: LVCMOS, LVTTL
Supply Voltage: 1.8V
Function: Enable/Disable
Frequency Stability: ±10ppm
Operating Temperature Range: -40°C to 85°C
Package Type: 4-SMD, No Lead
Package Dimensions: 3.20mm x 2.50mm
Maximum Height: 0.80mm
Current Specifications: 31mA (Max), 30mA (Disable Max)

The substitute parts listed below match all these parameters. The primary distinction is the series designation: substitute parts belong to the SiT8208 series, which represents the active product line continuation offering identical electrical and mechanical specifications to the legacy SiT8225 series.

Parameter Comparison

Parameter	SIT8225AI-2F-18E-25.000000Y	SIT8208AI-2F-18E-25.000000Y	SIT8208AI-2F-18E-25.000000T	SIT8208AI-2F-18E-25.000000X
Manufacturer	SiTime	SiTime	SiTime	SiTime
Series	SiT8225	SiT8208	SiT8208	SiT8208
Frequency	25 MHz	25 MHz	25 MHz	25 MHz
Output Type	LVCMOS, LVTTL	LVCMOS, LVTTL	LVCMOS, LVTTL	LVCMOS, LVTTL
Supply Voltage	1.8V	1.8V	1.8V	1.8V
Frequency Stability	±10ppm	±10ppm	±10ppm	±10ppm
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C
Function	Enable/Disable	Enable/Disable	Enable/Disable	Enable/Disable
Package Type	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead
Package Dimensions	3.20mm x 2.50mm	3.20mm x 2.50mm	3.20mm x 2.50mm	3.20mm x 2.50mm
Height - Seated (Max)	0.80mm	0.80mm	0.80mm	0.80mm
Current - Supply (Max)	31mA	31mA	31mA	31mA
Current - Supply (Disable) (Max)	30mA	30mA	30mA	30mA
Base Resonator	MEMS	MEMS	MEMS	MEMS
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Not For New Designs	Active	Active	Active

Engineering Selection Recommendations

The SIT8225AI-2F-18E-25.000000Y is classified as Not For New Designs. For applications requiring this oscillator specification, the SiT8208 series provides direct equivalents with Active product status. All substitute parts maintain identical electrical and mechanical parameters, ensuring pin-for-pin and functional compatibility.

The SiT8208AI-2F-18E-25.000000Y, SiT8208AI-2F-18E-25.000000T, and SiT8208AI-2F-18E-25.000000X are all Active products from SiTime's current product line. Selection among these three variants should be based on packaging tape configuration and inventory availability, as all three are electrically and mechanically equivalent. All substitute parts maintain ROHS3 compliance and REACH Unaffected status, consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can SIT8208 series oscillators directly replace the SIT8225AI-2F-18E-25.000000Y?

A: Yes. The SIT8208 series parts listed are direct electrical and mechanical equivalents. All parameters including frequency, output type, supply voltage, stability, temperature range, package dimensions, and current specifications are identical. Pin configuration and footprint compatibility are maintained.

Q: What is the difference between SIT8208AI-2F-18E-25.000000Y, SIT8208AI-2F-18E-25.000000T, and SIT8208AI-2F-18E-25.000000X?

A: These three part numbers differ only in packaging tape configuration (the final character designates the tape type). Electrically and mechanically, they are equivalent. Selection depends on your assembly equipment compatibility and tape reel specifications.

Q: Are the substitute parts compatible with existing PCB layouts designed for the SIT8225AI-2F-18E-25.000000Y?

A: Yes. The 4-SMD, No Lead package dimensions (3.20mm x 2.50mm) and maximum seated height (0.80mm) are identical across all parts. PCB footprints and assembly processes require no modification.

Q: What is the significance of the "Not For New Designs" status on the original part?

A: This designation indicates the SIT8225 series has been superseded by the SiT8208 series in SiTime's product portfolio. For new designs, SiT8208 parts should be specified. For legacy system support and ongoing production of existing designs, SiT8208 equivalents provide continuity with Active product status and full manufacturer support.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. All substitute parts are ROHS3 Compliant, REACH Unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's compliance profile.

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