PRBST1122 Equivalent & Substitute Parts

Part Overview

The PRBST1122 is a 122.88 MHz VCXO (Voltage Controlled Crystal Oscillator) manufactured by Diodes Incorporated, designed for PECL output applications requiring precise frequency control. This component operates at 3.3V with enable/disable functionality and is housed in a 6-SMD, No Lead surface mount package. The part is currently active in production with 694 units in stock. Finding equivalent or substitute parts may be necessary for supply chain continuity, design flexibility, or regional availability requirements.

Substiute Parts

PRBST1122

Diodes IncorporatedIn Stock: 795PRBST1122 Datasheet

Current PartRFQ

PRBST1122

Diodes IncorporatedIn Stock: 795PRBST1122 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the PRBST1122 is determined by strict equivalence across the following critical parameters:

• Frequency: 122.88 MHz (exact match required)
• Type: VCXO (Voltage Controlled Crystal Oscillator)
• Output Format: PECL (Positive Emitter Coupled Logic)
• Supply Voltage: 3.3V
• Function: Enable/Disable capability
• Frequency Stability: ±50ppm
• Operating Temperature Range: -40°C ~ 85°C
• Package / Case: 6-SMD, No Lead
• Physical Dimensions: 0.276" L x 0.197" W (7.00mm x 5.00mm)
• Height - Seated (Max): 0.079" (2.00mm)
• Current - Supply (Max): 90mA
• Compliance: ROHS3 Compliant, REACH Unaffected

Only components matching all of these parameters across electrical specifications, mechanical form factor, and regulatory compliance can be considered direct substitutes for the PRBST1122.

Parameter Comparison

Engineering Selection Recommendations

The PRBST1122 is an active product with full regulatory compliance (ROHS3 Compliant, REACH Unaffected). Component selection should prioritize parts with identical electrical and mechanical specifications to ensure direct pin-for-pin and functional compatibility. The 122.88 MHz PECL VCXO with 3.3V supply, enable/disable function, and ±50ppm stability represents a specialized frequency standard. Substitutes must maintain exact frequency, output format, supply voltage, and package dimensions to preserve circuit performance and PCB layout integrity. Compliance certifications must remain consistent across any alternative selection.

Frequently Asked Questions (FAQ)

Q: What makes a part a direct substitute for the PRBST1122?

A: A direct substitute must match all electrical parameters (122.88 MHz frequency, VCXO type, PECL output, 3.3V supply, ±50ppm stability, 90mA max current), mechanical specifications (6-SMD No Lead package, 7.00mm x 5.00mm dimensions, 2.00mm max height), functional capability (enable/disable), operating temperature range (-40°C ~ 85°C), and regulatory compliance (ROHS3, REACH Unaffected).

Q: Can I use a different frequency VCXO as a substitute?

A: No. The 122.88 MHz frequency is application-specific and cannot be substituted with alternative frequencies. Frequency changes alter system timing and performance.

Q: Is the 6-SMD, No Lead package critical for substitution?

A: Yes. The package form factor, pin count, and lead configuration are essential for PCB compatibility and assembly. Alternative packages require circuit board redesign.

Q: What is the significance of the ±50ppm frequency stability specification?

A: Frequency stability defines the oscillator's accuracy over temperature and supply voltage variations. This specification is critical for applications requiring precise timing and cannot be relaxed without affecting system performance.

Q: Does the enable/disable function need to be present in a substitute part?

A: Yes. The enable/disable function is a core feature of the PRBST1122. Any substitute must provide this capability to maintain design functionality.

Q: Are there alternative manufacturers for this specific part?

A: Substitution is based strictly on matching all provided electrical, mechanical, and compliance parameters. Only components meeting these exact criteria from any manufacturer qualify as direct substitutes.