Equivalent & Substitute Parts for Renesas 8304AMILF Clock Fanout Buffer

Part Overview

The Renesas 8304AMILF is a Clock Fanout Buffer (Distribution) IC with 1:4 output ratio and 166 MHz maximum frequency, housed in an 8-SOIC package. This part is classified as obsolete, making equivalent substitutes necessary for new designs and production continuity. The device provides LVCMOS/LVTTL input and output compatibility with a 3.135V to 3.465V supply voltage range and operates across -40°C to 85°C.

Key Parameters

Parameter	Value
Manufacturer Part Number	8304AMILF
Manufacturer	Renesas Electronics Corporation
Category	Clock/Timing
Type	Fanout Buffer (Distribution)
Number of Circuits	1
Ratio - Input:Output	1:4
Frequency - Max	166 MHz
Input Logic	LVCMOS, LVTTL
Output Logic	LVCMOS, LVTTL
Voltage - Supply	3.135V ~ 3.465V
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 8304AMILF is determined by the following critical parameters:

Core Functional Requirements:

Type: Fanout Buffer (Distribution)
Number of Circuits: 1
Ratio - Input:Output: 1:4
Differential Input/Output: No/No

Electrical Compatibility:

Frequency - Max: Must equal or exceed 166 MHz
Input Logic: LVCMOS or LVTTL
Output Logic: LVCMOS or LVTTL
Operating Temperature: Must support -40°C to 85°C range
Supply Voltage: Must accommodate 3.135V to 3.465V

Physical & Compliance:

Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Package compatibility: 8-SOIC footprint or equivalent pinout

The substitute parts listed below meet these criteria with the following considerations:

5PB1104CMGI: Renesas active product with higher frequency capability (200 MHz), wider supply voltage range (1.71V ~ 3.465V), and compact 8-UFDFN package. Functionally superior with extended operating range.
PL133-47SC, PL133-47SC-R, PL133-47SI: Microchip Technology active products with 150 MHz frequency, 8-SOIC package footprint match, and LVCMOS logic. Operating temperature and supply voltage ranges vary by variant.

Parameter Comparison

Parameter	8304AMILF	5PB1104CMGI	PL133-47SC	PL133-47SC-R	PL133-47SI
Manufacturer	Renesas	Renesas	Microchip	Microchip	Microchip
Type	Fanout Buffer	Fanout Buffer	Fanout Buffer	Fanout Buffer	Fanout Buffer
Ratio - Input:Output	1:4	1:4	1:4	1:4	1:4
Frequency - Max	166 MHz	200 MHz	150 MHz	150 MHz	150 MHz
Input Logic	LVCMOS, LVTTL	LVCMOS	LVCMOS	LVCMOS	LVCMOS
Output Logic	LVCMOS, LVTTL	LVCMOS	LVCMOS	LVCMOS	LVCMOS
Voltage - Supply	3.135V ~ 3.465V	1.71V ~ 3.465V	2.25V ~ 3.63V	2.25V ~ 3.63V	2.25V ~ 3.63V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C
Package / Case	8-SOIC	8-UFDFN	8-SOIC	8-SOIC	8-SOIC
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

For Direct Footprint Replacement (8-SOIC Package):

Select from the Microchip PL133 series (PL133-47SC, PL133-47SC-R, or PL133-47SI) when PCB layout constraints require the 8-SOIC package form factor. All three variants are active products with ROHS3 compliance. Choose PL133-47SI for full temperature range compatibility (-40°C to 85°C) matching the original 8304AMILF specification. PL133-47SC and PL133-47SC-R operate within 0°C to 70°C and are suitable for commercial temperature applications. Note that the 150 MHz maximum frequency is lower than the original 166 MHz specification; verify system timing margins before selection.

For Enhanced Performance (Compact Package):

The Renesas 5PB1104CMGI offers superior electrical performance with 200 MHz frequency capability, extended supply voltage range (1.71V ~ 3.465V), and full temperature range operation (-40°C ~ 85°C). The 8-UFDFN package is more compact than 8-SOIC but requires PCB redesign. This option is recommended for new designs where layout flexibility exists and higher frequency margin is beneficial. ROHS3 compliance and unlimited MSL rating match the original part's environmental specifications.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and REACH unaffected status. The 5PB1104CMGI and PL133-47SI provide unlimited moisture sensitivity (MSL 1), while PL133-47SC and PL133-47SC-R require MSL 3 handling (168 hours). Select based on production environment and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can the PL133-47SC series be used as a direct replacement for the 8304AMILF?

A: The PL133-47SC, PL133-47SC-R, and PL133-47SI share the same 8-SOIC package footprint and 1:4 fanout buffer functionality. However, the maximum frequency is 150 MHz versus 166 MHz for the original part. Substitution is valid only if system timing requirements do not exceed 150 MHz. The PL133-47SI variant supports the full -40°C to 85°C temperature range; PL133-47SC and PL133-47SC-R are limited to 0°C to 70°C.

Q: What are the key differences between the Microchip PL133 variants?

A: PL133-47SC and PL133-47SC-R are electrically identical, differing only in packaging format (Tube versus Tape & Reel). Both operate 0°C to 70°C with MSL 3 rating. PL133-47SI extends the operating temperature to -40°C to 85°C, matching the original 8304AMILF specification, and is supplied in Tube packaging with MSL 3 rating.

Q: Is the 5PB1104CMGI compatible with the 8304AMILF pinout?

A: The 5PB1104CMGI uses an 8-UFDFN package, which differs from the 8-SOIC package of the 8304AMILF. While both are 8-pin surface mount devices with identical functional pinout (1:4 fanout buffer), the physical package dimensions and land pattern are different. PCB redesign is required for this substitution.

Q: What is the impact of the lower 150 MHz frequency in the PL133 series?

A: The PL133 series maximum frequency of 150 MHz is 16 MHz lower than the 8304AMILF specification of 166 MHz. This reduction may impact timing margins in high-frequency clock distribution applications. Verify that the system clock frequency and any harmonic content remain within the 150 MHz limit before selecting this substitute.

Q: Are there supply voltage compatibility concerns?

A: The 8304AMILF operates within 3.135V to 3.465V. The PL133 series supports 2.25V to 3.63V, providing broader compatibility. The 5PB1104CMGI supports 1.71V to 3.465V, offering the widest range. All three substitute options accommodate the original part's supply voltage window.

Q: What is the significance of MSL ratings for these parts?

A: The 8304AMILF and 5PB1104CMGI carry MSL 1 (unlimited moisture sensitivity), requiring no special storage precautions. The PL133 series carries MSL 3 (168 hours), requiring controlled humidity storage and baking procedures if the part is exposed to ambient conditions for extended periods. Select based on your production environment and inventory management practices.

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