SY10H351JZ Equivalent & Substitute Parts

Part Overview

The SY10H351JZ is a mixed signal translator manufactured by Microchip Technology, designed to convert unidirectional signals between TTL/NMOS input levels and PECL output levels. This 20-PLCC surface mount device operates across the industrial temperature range of 0°C to 85°C and is currently in active production status.

Substitute parts become necessary when the SY10H351JZ reaches end-of-life status, inventory constraints occur, or when equivalent functionality from alternative manufacturers is required for supply chain optimization. The identified substitutes maintain the core translator architecture while operating within comparable electrical and mechanical parameters.

Key Parameters

Parameter	Value
Translator Type	Mixed Signal
Channel Type	Unidirectional
Number of Circuits	1
Channels per Circuit	4
Input Signal	TTL, NMOS
Output Signal	PECL
Output Type	Differential
Package / Case	20-LCC (J-Lead)
Mounting Type	Surface Mount
Operating Temperature	0°C ~ 85°C (TA)
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the SY10H351JZ is determined by the following critical parameters:

Translator Architecture: Mixed signal, unidirectional topology with 1 circuit and 4 channels per circuit
Signal Compatibility: TTL input signal acceptance with differential output configuration
Package Compatibility: 20-LCC (J-Lead) surface mount package with identical pinout
Environmental Compliance: ROHS3 compliance and MSL 3 rating for manufacturing compatibility
Mechanical Fit: 20-PLCC (9x9) supplier device package ensuring PCB footprint compatibility

The substitute parts MC10H124FNG and MC10H124FNR2G, both manufactured by onsemi, share the identical package, circuit count, channel configuration, and differential output architecture. Both accept TTL input signals and maintain the same mounting type and compliance certifications.

Parameter Comparison

Parameter	SY10H351JZ (Microchip)	MC10H124FNG (onsemi)	MC10H124FNR2G (onsemi)
Translator Type	Mixed Signal	Mixed Signal	Mixed Signal
Channel Type	Unidirectional	Unidirectional	Unidirectional
Number of Circuits	1	1	1
Channels per Circuit	4	4	4
Input Signal	TTL, NMOS	TTL	TTL
Output Signal	PECL	MECL	MECL
Output Type	Differential	Differential	Differential
Package / Case	20-LCC (J-Lead)	20-LCC (J-Lead)	20-LCC (J-Lead)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Operating Temperature	0°C ~ 85°C	0°C ~ 75°C	0°C ~ 75°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)
Product Status	Active	Obsolete	Obsolete

Engineering Selection Recommendations

Both MC10H124FNG and MC10H124FNR2G are functionally equivalent substitutes for the SY10H351JZ based on package compatibility, circuit architecture, and compliance certifications. The primary distinction between the two onsemi alternatives is packaging format: MC10H124FNG is supplied in standard packaging, while MC10H124FNR2G is supplied in Cut Tape (CT) format.

The operating temperature range of the substitute parts (0°C ~ 75°C) is narrower than the main part (0°C ~ 85°C). Applications requiring operation above 75°C must retain the SY10H351JZ. The output signal difference (PECL versus MECL) reflects different logic family implementations; both are differential output standards suitable for high-speed signal translation.

Both substitute parts carry ROHS3 compliance and identical MSL ratings, ensuring manufacturing process compatibility. The obsolete product status of the onsemi parts indicates limited future availability; the active status of the SY10H351JZ provides superior long-term supply assurance.

Frequently Asked Questions (FAQ)

Q: Can MC10H124FNG and MC10H124FNR2G be used interchangeably with SY10H351JZ?

A: Both onsemi parts share identical electrical specifications, package geometry, and pinout. The primary difference is packaging format (standard versus Cut Tape). Selection depends on assembly process requirements and temperature operating range constraints.

Q: What is the significance of the operating temperature difference?

A: The SY10H351JZ operates to 85°C, while both substitute parts operate to 75°C maximum. Applications requiring operation above 75°C must use the SY10H351JZ. Applications within the 0°C to 75°C range can use either part.

Q: Are the PECL and MECL output signals compatible?

A: PECL and MECL are distinct differential logic families with different voltage levels and impedance characteristics. While both are differential outputs, they are not directly interchangeable. Circuit design must accommodate the specific output standard of the selected part.

Q: What does the Cut Tape (CT) packaging format mean?

A: Cut Tape packaging supplies components on individual tape segments rather than continuous reel format. This format is typically used for lower-volume orders or specific assembly line requirements. Both formats contain identical components.

Q: Why are the onsemi substitutes marked as obsolete?

A: Obsolete status indicates these parts are no longer in active production. While current inventory exists, future availability cannot be assured. The SY10H351JZ active status provides superior supply chain continuity for new designs.

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