MPC93H51AC Equivalent & Substitute Parts

Part Overview

The MPC93H51AC is a PLL Clock Generator IC manufactured by Renesas Electronics Corporation, designed for 240MHz clock generation in 32-LQFP surface mount packaging. This component features PLL functionality with bypass capability, supporting LVCMOS and LVPECL input signals with LVCMOS output. The device operates across a supply voltage range of 3.135V to 3.465V and is rated for 0°C to 70°C operating temperature.

The MPC93H51AC is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support legacy system maintenance or redesign initiatives.

Key Parameters

Parameter	Value
Manufacturer	Renesas Electronics Corporation
Category	Clock/Timing
Type	PLL Clock Generator
Frequency - Max	240MHz
PLL with Bypass	Yes
Input Signal Types	LVCMOS, LVPECL
Output Signal Type	LVCMOS
Number of Circuits	1
Ratio - Input:Output	2:11
Voltage - Supply	3.135V ~ 3.465V
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
Package / Case	32-LQFP
Supplier Device Package	32-TQFP (7x7)
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	3 (168 Hours)
REACH Status	REACH Unaffected
ECCN	EAR99

Substitute Part Grouping Explanation

Substitution of the MPC93H51AC is based on the following critical parameters that must be maintained or exceeded:

Core Functional Requirements:

PLL Clock Generator with bypass capability
Single circuit configuration
LVCMOS and LVPECL input signal compatibility
LVCMOS output signal capability

Electrical Specifications:

Maximum frequency capability of 240MHz or higher
Supply voltage range compatibility with 3.135V ~ 3.465V
Operating temperature range of 0°C ~ 70°C or wider

Physical & Environmental:

Surface mount technology
Moisture Sensitivity Level 3 or better
REACH compliance status

The substitute part 8T49N285A-999NLGI meets these criteria through expanded capabilities: it supports higher frequency operation (1GHz), broader input/output signal compatibility, wider supply voltage range (2.375V ~ 3.465V), extended operating temperature range (-40°C ~ 85°C), and maintains MSL 3 rating with REACH compliance.

Parameter Comparison

Parameter	MPC93H51AC	8T49N285A-999NLGI
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation
Category	Clock/Timing	Clock/Timing
Type	PLL Clock Generator	IC Translator Universal Frequency
PLL with Bypass	Yes	Yes
Input Signal Types	LVCMOS, LVPECL	HCSL, LVCMOS, LVDSM, LVHSTL, LVPECL, Crystal
Output Signal Types	LVCMOS	HSCL, LVCMOS, LVDS, LVPECL
Number of Circuits	1	1
Frequency - Max	240MHz	1GHz
Voltage - Supply	3.135V ~ 3.465V	2.375V ~ 3.465V
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount
Package / Case	32-LQFP	56-VFQFN Exposed Pad
Product Status	Obsolete	Active
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99

Engineering Selection Recommendations

The 8T49N285A-999NLGI is a qualified substitute for the obsolete MPC93H51AC based on the following engineering criteria:

Product Status & Availability: The MPC93H51AC is obsolete, making the active status of 8T49N285A-999NLGI critical for ongoing supply chain support and new production requirements.

Compliance & Certifications: Both components maintain identical REACH compliance status (REACH Unaffected) and ECCN classification (EAR99), ensuring regulatory continuity. Both devices carry MSL 3 rating, indicating equivalent moisture handling requirements.

Functional Compatibility: The substitute part provides superset functionality: it retains all input and output signal types supported by the original part while adding extended capabilities (HCSL, LVDSM, LVHSTL, LVDS, Crystal input support). The PLL with bypass architecture is preserved.

Electrical Specifications: The 8T49N285A-999NLGI operates within the original supply voltage range and extends the operating temperature range, providing enhanced environmental tolerance. Maximum frequency capability increases from 240MHz to 1GHz, supporting higher-speed applications.

Physical Considerations: Package change from 32-LQFP to 56-VFQFN requires PCB layout redesign. The substitute part includes an exposed pad, which may improve thermal performance in applications requiring heat dissipation.

Frequently Asked Questions (FAQ)

Q: Can the 8T49N285A-999NLGI directly replace the MPC93H51AC without circuit modifications?

A: The substitute part is functionally compatible but requires PCB layout redesign due to package change (32-LQFP to 56-VFQFN). Pin assignments and signal routing must be verified against device datasheets. The expanded input/output signal compatibility does not require circuit changes if the original signal types are used.

Q: What is the impact of the package change from 32-LQFP to 56-VFQFN?

A: The 56-VFQFN package has different pin count, pitch, and footprint dimensions. PCB redesign is mandatory. The exposed pad in the VFQFN package may provide improved thermal characteristics compared to the LQFP package.

Q: Are the supply voltage ranges compatible?

A: The 8T49N285A-999NLGI supply range (2.375V ~ 3.465V) encompasses the MPC93H51AC range (3.135V ~ 3.465V). Designs operating at the original voltage specifications will function with the substitute part.

Q: Does the higher maximum frequency (1GHz vs 240MHz) affect compatibility?

A: The substitute part's higher frequency capability is a superset feature. Applications using the original 240MHz specification will operate within the substitute part's rated range. No adverse effects result from this capability difference.

Q: Are moisture sensitivity and handling requirements identical?

A: Both components carry MSL 3 (168 Hours) rating, requiring identical moisture control procedures during storage, handling, and assembly.

Q: What compliance certifications apply to both parts?

A: Both the MPC93H51AC and 8T49N285A-999NLGI maintain REACH Unaffected status and EAR99 ECCN classification, ensuring regulatory equivalence for export and use.

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