Z8523316FSC Equivalent & Substitute Parts

Part Overview

The Z8523316FSC is a specialized interface IC manufactured by Zilog in a 44-LQFP package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. The part operates within a 4.5V to 5.5V supply voltage range and is designed for surface mount applications. Due to its obsolete status, identifying functionally compatible alternatives is essential for procurement and design continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	Z8523316FSC
Manufacturer	Zilog
Category	Interface
Description	IC INTERFACE SPECIALIZED 44LQFP
Package / Case	44-LQFP (10x10)
Voltage - Supply	4.5V ~ 5.5V
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitute parts for the Z8523316FSC are identified based on the following criteria:

Category Match: All substitutes are classified as Interface components
Mounting Type: Surface mount technology compatibility
Functional Classification: Specialized interface IC functionality
Supply Voltage Compatibility: Parts capable of operating within or overlapping the 4.5V to 5.5V range, or parts with lower voltage requirements suitable for level-shifted applications
Package Compatibility: Consideration of pin count and form factor where applicable
Product Status: Active status preferred for long-term availability

The substitute parts listed include components from active manufacturers with current production status and modern compliance certifications (ROHS3), addressing the obsolescence of the original part while maintaining interface functionality across various application domains including Ethernet control, data transport, address translation, and bus switching.

Parameter Comparison

Part Number	Manufacturer	Category	Package / Case	Voltage - Supply	Mounting Type	Product Status	RoHS Status	MSL
Z8523316FSC	Zilog	Interface	44-LQFP (10x10)	4.5V ~ 5.5V	Surface Mount	Obsolete	RoHS non-compliant	3 (168 Hours)
ADN8102ACPZ	Analog Devices Inc.	Interface	64-LFCSP-VQ (9x9)	1.8V ~ 3.3V	Surface Mount	Active	ROHS3 Compliant	3 (168 Hours)
DS110DF1610FB/NOPB	Texas Instruments	Interface	196-FCBGA (15x15)	2.375V ~ 2.625V	Surface Mount	Active	ROHS3 Compliant	4 (72 Hours)
DS3680N	Texas Instruments	Interface	14-PDIP	Not Specified	Through Hole	Active	ROHS3 Compliant	Not Applicable
LMH0344GRE/NOPB	Texas Instruments	Interface	25-CSBGA (3x3)	3.135V ~ 3.465V	Surface Mount	Active	ROHS3 Compliant	1 (Unlimited)
LTC4317IDHC#TRPBF	Analog Devices Inc.	Interface	16-DFN (5x3)	2.25V ~ 5.5V	Surface Mount	Active	ROHS3 Compliant	1 (Unlimited)
NCT5948W	Nuvoton Technology Corporation	Interface	Not Specified	Not Specified	Not Specified	Active	ROHS3 Compliant	Not Specified
PI4MSD5V9548ALEX	Diodes Incorporated	Logic	24-TSSOP	1.65V ~ 5.5V	Surface Mount	Active	ROHS3 Compliant	1 (Unlimited)
PTN3460BS/F6Y	NXP USA Inc.	Interface	56-HVQFN (7x7)	3.3V	Surface Mount	Active	ROHS3 Compliant	3 (168 Hours)
TCA8418RTWR	Texas Instruments	Interface	24-WQFN (4x4)	1.65V ~ 3.6V	Surface Mount	Active	ROHS3 Compliant	2 (1 Year)
TDA19978AHV/15C183	NXP USA Inc.	Interface	144-HLQFP (20x20)	1.8V, 3.3V	Surface Mount	Active	ROHS3 Compliant	3 (168 Hours)

Engineering Selection Recommendations

When selecting a substitute for the Z8523316FSC, the following engineering criteria apply:

Product Status Consideration: All listed substitute parts maintain active production status, ensuring long-term availability and supply chain stability compared to the obsolete Z8523316FSC.

Compliance and Certification: The original Z8523316FSC is RoHS non-compliant. All substitute parts listed are ROHS3 compliant, meeting current regulatory requirements for electronic components in most markets. This compliance upgrade is significant for new designs and systems requiring adherence to environmental and safety standards.

Voltage Supply Range: The Z8523316FSC operates at 4.5V to 5.5V. Substitute selection depends on system voltage requirements. The LTC4317IDHC#TRPBF and PI4MSD5V9548ALEX both support the full 5.5V upper limit, making them suitable for direct voltage-compatible applications. Other substitutes operate at lower voltage ranges and require level-shifting or power supply modification.

Moisture Sensitivity: The original part specifies MSL 3 (168 Hours). Substitutes with MSL 1 (Unlimited) such as LMH0344GRE/NOPB, LTC4317IDHC#TRPBF, and PI4MSD5V9548ALEX offer superior moisture handling characteristics, reducing risk in humid storage and manufacturing environments.

Package and Mounting: The original 44-LQFP package is a mid-range pin count surface mount option. Substitute parts vary significantly in package size and pin count. Selection should align with PCB layout constraints and manufacturing capabilities.

Frequently Asked Questions (FAQ)

Q: Can I directly replace the Z8523316FSC with any of these substitute parts?

A: Direct replacement depends on functional requirements and system design. All listed parts are Interface category components suitable for surface mount applications, but they differ in package size, pin count, voltage requirements, and specific interface protocols. Verify that the substitute part's voltage supply range, package compatibility, and functional specifications match your application requirements.

Q: Why is the original Z8523316FSC obsolete?

A: The Z8523316FSC is classified as obsolete by the manufacturer, meaning production has ended and inventory is limited. This necessitates identifying active substitute parts for new designs and ongoing system support.

Q: What is the significance of RoHS3 compliance on substitute parts?

A: RoHS3 compliance indicates that substitute parts meet current Restriction of Hazardous Substances regulations, eliminating lead and other restricted materials. This is essential for products sold in regulated markets and for systems requiring environmental compliance certification.

Q: How do I determine voltage compatibility with substitute parts?

A: Compare your system's supply voltage with the substitute part's voltage range specification. The Z8523316FSC operates at 4.5V to 5.5V. Substitutes with overlapping ranges (such as LTC4317IDHC#TRPBF at 2.25V to 5.5V) are directly compatible. Parts with lower voltage ranges require level-shifting circuitry or separate power supplies.

Q: What does MSL (Moisture Sensitivity Level) mean for component selection?

A: MSL indicates how long a component can be exposed to moisture before soldering. MSL 3 (168 Hours) allows 168 hours of exposure; MSL 1 (Unlimited) has no time restriction. Higher MSL ratings reduce risk in humid environments and provide greater manufacturing flexibility.

Q: Are there package size considerations when selecting a substitute?

A: Yes. The original Z8523316FSC uses a 44-LQFP (10x10mm) package. Substitute parts use various packages ranging from 14-PDIP to 196-FCBGA. Ensure the selected substitute's package fits your PCB layout and that your manufacturing process supports the package type (surface mount vs. through-hole).

Q: Which substitute part offers the best long-term availability?

A: All listed substitutes maintain active production status. Parts from major manufacturers such as Texas Instruments, Analog Devices Inc., and NXP USA Inc. typically offer extended availability windows. Verify current inventory and lead times with your component supplier.

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