SXGPON155 Equivalent & Substitute Parts

Part Overview

The SXGPON155 is a 155.52 MHz XO (Standard) CMOS oscillator manufactured by Diodes Incorporated, designed for applications requiring precision frequency generation with enable/disable functionality. This component operates at 3.3V supply voltage and is housed in a 4-SMD, No Lead surface mount package with dimensions of 7.00mm x 5.00mm.

The SXGPON155 carries an Obsolete product status, making identification of suitable substitute components essential for ongoing system support, design updates, and procurement continuity. Substitute parts must maintain electrical and mechanical compatibility while meeting current manufacturing and compliance standards.

Key Parameters

Parameter	Value
Frequency	155.52 MHz
Output Type	CMOS
Supply Voltage	3.3V
Function	Enable/Disable
Frequency Stability	±50ppm
Operating Temperature Range	-40°C ~ 85°C
Package Type	4-SMD, No Lead
Package Dimensions	7.00mm x 5.00mm
Maximum Height	1.80mm
Mounting Type	Surface Mount
RoHS Status	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SXGPON155 is determined by strict alignment of the following critical parameters:

Frequency: Must be 155.52 MHz (exact match required)
Supply Voltage: Must be 3.3V (exact match required)
Function: Must support Enable/Disable capability (exact match required)
Package Type: Must be 4-SMD, No Lead (exact match required)
Package Dimensions: Must be 7.00mm x 5.00mm (exact match required)
Operating Temperature Range: Must cover -40°C ~ 85°C minimum (exact match required)
Mounting Type: Must be Surface Mount (exact match required)

The FNF550008 meets all critical substitution criteria. While output type differs (HCMOS/LVCMOS versus CMOS) and frequency stability improves (±30ppm versus ±50ppm), these represent functional enhancements rather than incompatibilities. The FNF550008 maintains full electrical and mechanical compatibility with the SXGPON155 footprint and pinout.

Parameter Comparison

Parameter	SXGPON155	FNF550008	Compatibility
Manufacturer	Diodes Incorporated	Diodes Incorporated	Same
Frequency	155.52 MHz	155.52 MHz	Exact Match
Output Type	CMOS	HCMOS, LVCMOS	Compatible
Supply Voltage	3.3V	3.3V	Exact Match
Function	Enable/Disable	Enable/Disable	Exact Match
Frequency Stability	±50ppm	±30ppm	Enhanced
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	Exact Match
Current - Supply (Max)	20mA	55mA	Higher in Substitute
Current - Supply (Disable) (Max)	10mA	10µA	Lower in Substitute
Package / Case	4-SMD, No Lead	4-SMD, No Lead	Exact Match
Size / Dimension	7.00mm x 5.00mm	7.00mm x 5.00mm	Exact Match
Height - Seated (Max)	1.80mm	1.80mm	Exact Match
Mounting Type	Surface Mount	Surface Mount	Exact Match
Product Status	Obsolete	Active	Substitute is Current
RoHS Status	RoHS Compliant	ROHS3 Compliant	Both Compliant
REACH Status	REACH Unaffected	REACH Unaffected	Same

Engineering Selection Recommendations

The FNF550008 is the qualified substitute for the obsolete SXGPON155. Selection is based on the following engineering criteria:

Product Status: The SXGPON155 is obsolete, while the FNF550008 maintains Active product status, ensuring long-term availability and manufacturing support.

Compliance & Certifications: Both components are RoHS Compliant and REACH Unaffected. The FNF550008 carries ROHS3 certification, meeting current regulatory requirements for new designs and procurement.

Electrical & Mechanical Compatibility: The FNF550008 provides identical frequency (155.52 MHz), supply voltage (3.3V), enable/disable function, operating temperature range (-40°C ~ 85°C), and package specifications (4-SMD, No Lead, 7.00mm x 5.00mm, 1.80mm height). These parameters ensure direct substitution without PCB redesign or system reconfiguration.

Performance Enhancement: The FNF550008 offers improved frequency stability (±30ppm versus ±50ppm) and significantly reduced disable-mode current consumption (10µA versus 10mA), providing operational advantages in power-sensitive applications.

Frequently Asked Questions (FAQ)

Q: Can the FNF550008 replace the SXGPON155 without PCB modifications?

A: Yes. Both components share identical package type (4-SMD, No Lead), dimensions (7.00mm x 5.00mm), height (1.80mm), and pinout configuration. Direct substitution on existing PCBs is supported.

Q: What is the difference between CMOS and HCMOS/LVCMOS output types?

A: HCMOS (High-speed CMOS) and LVCMOS (Low-Voltage CMOS) are compatible output standards that maintain CMOS-level logic compatibility. The FNF550008 output type represents a functional enhancement rather than an incompatibility.

Q: Does the higher maximum supply current (55mA vs 20mA) in the FNF550008 affect system design?

A: The FNF550008 maximum supply current specification is higher, but actual operating current depends on load conditions and frequency. System power supply design should accommodate the specified maximum. The significantly lower disable-mode current (10µA versus 10mA) provides power savings during standby operation.

Q: Are both components suitable for the same temperature range applications?

A: Yes. Both the SXGPON155 and FNF550008 operate across the identical temperature range of -40°C to 85°C, supporting equivalent thermal environment requirements.

Q: What compliance certifications apply to the FNF550008?

A: The FNF550008 is ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory standards for electronic component manufacturing and use.

Q: Is the improved frequency stability (±30ppm) of the FNF550008 a requirement for substitution?

A: No. Improved frequency stability is a performance enhancement. The FNF550008 meets or exceeds the frequency stability requirement of the SXGPON155 (±50ppm), making it suitable for applications with either specification.

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