TRF3761-DIRHAR Integer-N Synthesizer/VCO IC Equivalent & Substitute Parts

Part Overview

The TRF3761-DIRHAR is an Integer-N Synthesizer/VCO IC manufactured by Texas Instruments, designed for clock/timing applications with a maximum frequency of 1.87GHz. This component operates as a phase-locked loop (PLL) with integrated voltage-controlled oscillator functionality in a 40-VFQFN exposed pad surface mount package.

The TRF3761-DIRHAR is classified as obsolete. Substitute parts from the same TRF3761 base product family are available to maintain design continuity and ensure supply chain reliability for applications requiring Integer-N synthesis functionality.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Clock/Timing
Type	Integer-N Synthesizer/VCO
Frequency - Max	1.87GHz
Voltage - Supply	4.5V ~ 5.25V
Operating Temperature	-40°C ~ 85°C
Package / Case	40-VFQFN Exposed Pad
Supplier Device Package	40-VQFN (6x6)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitute parts for the TRF3761-DIRHAR are selected from the TRF3761 base product family based on the following criteria:

Critical Parameters for Substitution:

Identical package type: 40-VFQFN Exposed Pad (40-VQFN 6x6)
Identical supply voltage range: 4.5V ~ 5.25V
Identical operating temperature range: -40°C ~ 85°C
Identical mounting type: Surface Mount
Identical functional type: Integer-N Synthesizer/VCO with PLL
Identical input/output configuration: Clock input, Clock output, 1:1 ratio, Differential output (No/Yes)
Identical regulatory compliance: ROHS3 Compliant, REACH Unaffected, MSL 3

Variable Parameter:

Maximum frequency specification varies across substitute parts (1.6GHz to 1.79GHz), which is the primary differentiator within the TRF3761 family.

All substitute parts maintain identical electrical and mechanical compatibility with the main part, differing only in maximum frequency rating.

Parameter Comparison

Part Number	Manufacturer	Frequency - Max	Voltage - Supply	Operating Temperature	Package / Case	Product Status	Inventory (Pcs)
TRF3761-DIRHAR	Texas Instruments	1.87GHz	4.5V ~ 5.25V	-40°C ~ 85°C	40-VFQFN Exposed Pad	Obsolete	1500
TRF3761-AIRHAR	Texas Instruments	1.6GHz	4.5V ~ 5.25V	-40°C ~ 85°C	40-VFQFN Exposed Pad	Active	1096
TRF3761-AIRHAT	Texas Instruments	1.6GHz	4.5V ~ 5.25V	-40°C ~ 85°C	40-VFQFN Exposed Pad	Active	1108
TRF3761-BIRHAT	Texas Instruments	1.71GHz	4.5V ~ 5.25V	-40°C ~ 85°C	40-VFQFN Exposed Pad	Active	1284
TRF3761-CIRHAT	Texas Instruments	1.79GHz	4.5V ~ 5.25V	-40°C ~ 85°C	40-VFQFN Exposed Pad	Active	833

Engineering Selection Recommendations

All substitute parts listed are active products from Texas Instruments, ensuring ongoing availability and support compared to the obsolete TRF3761-DIRHAR. All substitute parts maintain identical regulatory compliance status (ROHS3 Compliant, REACH Unaffected) and identical moisture sensitivity specifications (MSL 3, 168 Hours).

Selection among substitute parts should be based on application frequency requirements:

TRF3761-AIRHAR / TRF3761-AIRHAT: Maximum frequency 1.6GHz. Select when application frequency ceiling is 1.6GHz or lower.
TRF3761-BIRHAT: Maximum frequency 1.71GHz. Select when application frequency ceiling is between 1.6GHz and 1.71GHz.
TRF3761-CIRHAT: Maximum frequency 1.79GHz. Select when application frequency ceiling is between 1.71GHz and 1.79GHz.

All substitute parts are electrically and mechanically interchangeable with the TRF3761-DIRHAR within their respective frequency specifications.

Frequently Asked Questions (FAQ)

Q: Can TRF3761-AIRHAR or TRF3761-AIRHAT be used as direct replacements for TRF3761-DIRHAR?

A: Yes, provided the application maximum frequency requirement does not exceed 1.6GHz. Both parts are electrically and mechanically identical to TRF3761-DIRHAR except for the lower maximum frequency specification. All other parameters, including supply voltage, operating temperature, package type, and pin configuration, are identical.

Q: What is the difference between TRF3761-AIRHAR and TRF3761-AIRHAT?

A: Both parts have identical electrical specifications and maximum frequency (1.6GHz). The difference is in packaging format: TRF3761-AIRHAR is supplied in Tape & Reel (TR) format. Both are functionally equivalent for circuit design purposes.

Q: Are all substitute parts available in the same package?

A: Yes. All substitute parts use the 40-VFQFN Exposed Pad package (40-VQFN 6x6) with surface mount mounting type. PCB layout and footprint compatibility is maintained across all parts.

Q: What compliance certifications apply to substitute parts?

A: All substitute parts maintain ROHS3 compliance and REACH Unaffected status, identical to the main part. Moisture sensitivity level is MSL 3 (168 Hours) for all parts.

Q: Which substitute part has the closest frequency specification to TRF3761-DIRHAR?

A: TRF3761-CIRHAT has the closest maximum frequency specification at 1.79GHz, compared to the TRF3761-DIRHAR at 1.87GHz. This part provides the highest frequency capability among available substitutes while maintaining full electrical and mechanical compatibility.

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