545BBC156M250ABG Crystal Oscillator Equivalent & Substitute Parts

Part Overview

The 545BBC156M250ABG is a 156.25 MHz XO (Standard) LVDS oscillator manufactured by Skyworks Solutions Inc. as part of the Ultra™ Si545 series. This component operates across multiple supply voltages (1.8V, 2.5V, 3.3V) with Enable/Disable functionality in a 6-SMD, No Lead surface mount package.

The 545BBC156M250ABG carries a "Not For New Designs" product status, indicating it has been superseded. Identifying equivalent substitute parts ensures design continuity and maintains access to functionally compatible components for existing applications, maintenance, and legacy system support.

Key Parameters

Parameter	Specification
Frequency	156.25 MHz
Output Type	LVDS
Supply Voltage	1.8V, 2.5V, 3.3V
Function	Enable/Disable
Frequency Stability	±10ppm
Operating Temperature Range	-40°C ~ 85°C
Package Type	6-SMD, No Lead
Package Dimensions	7.00mm x 5.00mm x 1.43mm (max height)
Current Supply (Max)	121mA
Current Supply (Disable Max)	112mA
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 545BBC156M250ABG is determined by strict equivalence across the following critical parameters:

Frequency: 156.25 MHz (exact match required)
Output Configuration: LVDS (no alternative output types acceptable)
Supply Voltage Range: 1.8V, 2.5V, 3.3V (minimum voltage support required)
Function: Enable/Disable capability (functional requirement)
Frequency Stability: ±10ppm (performance specification)
Operating Temperature: -40°C ~ 85°C (environmental specification)
Package: 6-SMD, No Lead (physical and electrical compatibility)
Mounting: Surface Mount (assembly compatibility)

The 545BBC156M250ACG meets all substitution criteria as a direct equivalent within the Ultra™ Si545 series, with the primary distinction being its Active product status versus the Not For New Designs status of the original part.

Parameter Comparison

Parameter	545BBC156M250ABG	545BBC156M250ACG	Match
Manufacturer	Skyworks Solutions Inc.	Skyworks Solutions Inc.	✓
Series	Ultra™ Si545	Ultra™ Si545	✓
Frequency	156.25 MHz	156.25 MHz	✓
Output Type	LVDS	LVDS	✓
Supply Voltage	1.8V, 2.5V, 3.3V	1.8V ~ 3.3V	✓
Function	Enable/Disable	Enable/Disable	✓
Frequency Stability	±10ppm	±10ppm	✓
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	✓
Package / Case	6-SMD, No Lead	6-SMD, No Lead	✓
Package Dimensions	7.00mm x 5.00mm	7.00mm x 5.00mm	✓
Height - Seated (Max)	1.43mm	1.43mm	✓
Current - Supply (Max)	121mA	121mA	✓
Current - Supply (Disable Max)	112mA	112mA	✓
Mounting Type	Surface Mount	Surface Mount	✓
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	✓
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	✓
Product Status	Not For New Designs	Active	Upgrade Path

Engineering Selection Recommendations

The 545BBC156M250ACG is the direct substitute for the 545BBC156M250ABG. Both components are ROHS3 compliant and share identical electrical and mechanical specifications across all critical parameters.

The primary distinction is product lifecycle status: the 545BBC156M250ABG is designated "Not For New Designs," while the 545BBC156M250ACG maintains Active status. For new designs, production builds, or long-term supply chain planning, the 545BBC156M250ACG is the recommended selection. For existing applications currently using the 545BBC156M250ABG, the 545BBC156M250ACG provides full functional and physical compatibility without design modification.

Both parts are manufactured by Skyworks Solutions Inc. within the Ultra™ Si545 series and carry identical certifications and compliance ratings.

Frequently Asked Questions (FAQ)

Q: Can the 545BBC156M250ACG be used as a direct replacement for the 545BBC156M250ABG?

A: Yes. The 545BBC156M250ACG is a direct substitute. All electrical parameters, frequency specifications, output characteristics, supply voltage ranges, package dimensions, and mounting requirements are identical. No circuit modifications are required.

Q: What is the significance of the "Not For New Designs" status on the 545BBC156M250ABG?

A: This designation indicates the part has been superseded in the product lifecycle. While existing inventory remains available, Skyworks Solutions Inc. recommends the 545BBC156M250ACG for new applications. The substitute part maintains full compatibility with existing designs.

Q: Are the package dimensions identical between these two parts?

A: Yes. Both the 545BBC156M250ABG and 545BBC156M250ACG use the same 6-SMD, No Lead package with dimensions of 7.00mm x 5.00mm and a maximum seated height of 1.43mm. PCB footprints and assembly processes are identical.

Q: Do both parts support the same supply voltage range?

A: Yes. Both parts operate across 1.8V, 2.5V, and 3.3V supply voltages with identical current consumption specifications (121mA maximum during operation, 112mA maximum in disable mode).

Q: Is there any difference in frequency stability or operating temperature range?

A: No. Both parts maintain ±10ppm frequency stability and operate across the -40°C ~ 85°C temperature range.

Q: Are both parts RoHS compliant?

A: Yes. Both the 545BBC156M250ABG and 545BBC156M250ACG are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited).

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