Z8523320FSG Equivalent & Substitute Parts Reference

Part Overview

The Z8523320FSG is a specialized interface IC manufactured by Zilog in a 44-LQFP package. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and production continuity. The part operates within a 4.5V to 5.5V supply voltage range and is housed in a 44-LQFP (10x10) surface mount package. Due to its obsolete status, alternative components from active product lines are required for new designs and legacy system maintenance.

Key Parameters

Parameter	Value
Manufacturer Part Number	Z8523320FSG
Manufacturer	Zilog
Category	Interface
Package / Case	44-LQFP (10x10)
Voltage - Supply	4.5V ~ 5.5V
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the Z8523320FSG is determined by the following critical parameters:

Interface Category: All substitute parts must function as specialized interface ICs
Voltage Supply Range: Substitutes must operate within compatible voltage ranges (4.5V ~ 5.5V preferred, or overlapping ranges)
Package Type: Surface mount packages with pin counts and form factors suitable for PCB integration
Product Status: Active product status ensures ongoing availability and support
Compliance Standards: ROHS3 compliance and REACH unaffected status maintain regulatory alignment
Moisture Sensitivity: MSL rating determines storage and handling requirements

The substitute parts identified include both direct Zilog alternatives and functionally equivalent interface ICs from other manufacturers including Analog Devices Inc., Texas Instruments, Rohm Semiconductor, and Semtech Corporation.

Parameter Comparison

Part Number	Manufacturer	Package / Case	Voltage - Supply	Product Status	RoHS Status	MSL
Z8523320FSG	Zilog	44-LQFP (10x10)	4.5V ~ 5.5V	Obsolete	ROHS3 Compliant	3 (168 Hours)
Z8523320ASG	Zilog	44-LQFP (10x10)	4.5V ~ 5.5V	Active	ROHS3 Compliant	3 (168 Hours)
ADN8102ACPZ-R7	Analog Devices Inc.	64-LFCSP-VQ (9x9)	1.8V ~ 3.3V	Active	ROHS3 Compliant	3 (168 Hours)
BU6521KV-E2	Rohm Semiconductor	48-VQFPC (7x7)	1.5V, 3.3V (Digital); 2.7V ~ 3.6V (Analog)	Active	ROHS3 Compliant	1 (Unlimited)
DP83822HFRHBR	Texas Instruments	32-VQFN (5x5)	1.71V ~ 3.45V	Active	ROHS3 Compliant	2 (1 Year)
DS110DF410SQE/NOPB	Texas Instruments	48-WQFN (7x7)	2.375V ~ 2.625V	Active	ROHS3 Compliant	3 (168 Hours)
GS6042-INTE3	Semtech Corporation	16-QFN (4x4)	3.3V	Active	RoHS Compliant	1 (Unlimited)
LTC1955EUH#PBF	Analog Devices Inc.	32-QFN (5x5)	1.7V ~ 5.5V	Active	ROHS3 Compliant	1 (Unlimited)
LTC4316IDD#PBF	Analog Devices Inc.	10-DFN (3x3)	2.25V ~ 5.5V	Active	ROHS3 Compliant	1 (Unlimited)
MAX14502AETL+T	Analog Devices Inc./Maxim Integrated	40-TQFN (5x5)	1.8V ~ 3.3V	Active	ROHS3 Compliant	1 (Unlimited)
MAX3798ETJ+	Analog Devices Inc./Maxim Integrated	32-TQFN (5x5)	2.85V ~ 3.63V	Active	ROHS3 Compliant	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitute: Z8523320ASG

The Z8523320ASG from Zilog is the direct functional equivalent of the Z8523320FSG. It maintains identical electrical specifications (4.5V ~ 5.5V supply voltage), package configuration (44-LQFP 10x10), and compliance certifications (ROHS3 Compliant, REACH Unaffected). The critical distinction is product status: Z8523320ASG is active, ensuring continued availability and manufacturer support. This part is the preferred choice for direct replacement in existing designs.

Secondary Substitutes for Voltage-Compatible Applications

For applications where voltage supply ranges permit lower operating voltages, the following parts offer active product status and ROHS3 compliance:

LTC1955EUH#PBF (Analog Devices Inc.): Operates across 1.7V ~ 5.5V, encompassing the original 4.5V ~ 5.5V range. MSL rating of 1 (Unlimited) provides superior moisture handling compared to the original part's MSL 3 rating.
LTC4316IDD#PBF (Analog Devices Inc.): Supports 2.25V ~ 5.5V supply voltage with MSL 1 (Unlimited) rating. Specialized for address translation interface applications.

Application-Specific Alternatives

DP83822HFRHBR (Texas Instruments): Ethernet interface IC with MII/RMII support. Suitable for applications requiring Ethernet connectivity with 1.71V ~ 3.45V operation.
BU6521KV-E2 (Rohm Semiconductor): Video encoder IC for camera applications. Offers MSL 1 (Unlimited) rating and dual voltage supply capability (1.5V/3.3V digital, 2.7V ~ 3.6V analog).

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original component.

Frequently Asked Questions (FAQ)

Q: Can Z8523320ASG be used as a direct replacement for Z8523320FSG?

A: Yes. The Z8523320ASG is functionally equivalent with identical electrical specifications and package configuration. The primary difference is product status: Z8523320ASG is active while Z8523320FSG is obsolete. Both parts comply with ROHS3 and maintain the same 4.5V ~ 5.5V supply voltage range and 44-LQFP (10x10) package.

Q: What determines compatibility between the Z8523320FSG and substitute parts?

A: Compatibility is determined by interface category, voltage supply range overlap, package type suitability for PCB integration, and compliance certifications. The original part operates at 4.5V ~ 5.5V; substitutes with overlapping or encompassing voltage ranges are compatible. All recommended substitutes maintain ROHS3 compliance and active product status.

Q: Are there voltage-compatible substitutes that operate at the original 4.5V ~ 5.5V range?

A: Z8523320ASG maintains the exact 4.5V ~ 5.5V range. LTC1955EUH#PBF and LTC4316IDD#PBF both support voltage ranges that encompass 4.5V ~ 5.5V operation (1.7V ~ 5.5V and 2.25V ~ 5.5V respectively), providing additional design flexibility.

Q: What is the significance of MSL (Moisture Sensitivity Level) ratings in substitution?

A: MSL rating determines storage and handling requirements. The original Z8523320FSG has MSL 3 (168 hours), requiring controlled storage conditions. Several substitutes offer MSL 1 (Unlimited), eliminating moisture sensitivity constraints and reducing handling complexity during manufacturing and storage.

Q: Can I use lower voltage interface ICs as substitutes?

A: Substitution feasibility depends on application requirements. Parts like ADN8102ACPZ-R7 (1.8V ~ 3.3V) and MAX14502AETL+T (1.8V ~ 3.3V) operate at lower voltages than the original 4.5V ~ 5.5V specification. These are suitable only if your application circuit can operate at reduced voltage levels.

Q: What package considerations apply when selecting substitutes?

A: The original Z8523320FSG uses a 44-LQFP (10x10) package. Substitute parts employ various packages (64-LFCSP, 48-VQFPC, 32-VQFN, 16-QFN, 10-DFN, 40-TQFN, 32-TQFN). Package selection depends on PCB layout constraints, pin count requirements, and thermal management needs. Verify PCB footprint compatibility before design implementation.

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