PI3A4626ZCEX Equivalent & Substitute Parts

Part Overview

The PI3A4626ZCEX is a single-circuit SPST-NO (Normally Open) analog switch manufactured by Diodes Incorporated, designed for low-voltage signal switching applications. This device features a 400mOhm on-state resistance and operates across a 1.5V to 3.6V supply voltage range in a compact 6-TDFN surface mount package.

The PI3A4626ZCEX is classified as obsolete. Identifying suitable substitute components is necessary to maintain design continuity and ensure component availability for new production runs and system updates.

Key Parameters

Parameter	Value
Switch Circuit Type	SPST - NO (Single Pole Single Throw - Normally Open)
Multiplexer/Demultiplexer Circuit	1:1
Number of Circuits	1
On-State Resistance (Max)	400mOhm
Channel-to-Channel Matching (ΔRon)	50mOhm (Max)
Voltage - Supply, Single (V+)	1.5V ~ 3.6V
Switch Time (Ton, Toff) (Max)	10ns, 10ns
Charge Injection	50pC
Channel Capacitance (CS(off), CD(off))	130pF, 130pF
Current - Leakage (IS(off)) (Max)	1nA
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	6-WDFN Exposed Pad
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the PI3A4626ZCEX is determined by the following critical parameters:

Switch Circuit Configuration: SPST - NO topology with 1:1 multiplexer/demultiplexer ratio
On-State Resistance: 400mOhm maximum specification
Supply Voltage Range: Minimum 1.5V operation capability
Operating Temperature Range: -40°C to 85°C
Surface Mount Packaging: Compatibility with automated assembly processes
RoHS3 Compliance: Environmental and regulatory requirement

The ISL84715IHZ-T from Renesas Electronics Corporation meets these core substitution criteria. While package geometry differs (SC-70-5 versus 6-TDFN), both are surface mount solutions suitable for automated assembly. The ISL84715IHZ-T maintains the same switch circuit type, on-state resistance specification, and operating temperature range. Supply voltage compatibility is confirmed within the overlapping range of 1.65V to 3.6V.

Parameter Comparison

Parameter	PI3A4626ZCEX (Main Part)	ISL84715IHZ-T (Substitute)
Manufacturer	Diodes Incorporated	Renesas Electronics Corporation
Product Status	Obsolete	Active
Switch Circuit	SPST - NO	SPST - NO
Multiplexer/Demultiplexer Circuit	1:1	1:1
Number of Circuits	1	1
On-State Resistance (Max)	400mOhm	400mOhm
Voltage - Supply, Single (V+)	1.5V ~ 3.6V	1.65V ~ 3.6V
Switch Time Ton (Max)	10ns	12ns
Switch Time Toff (Max)	10ns	8ns
Charge Injection	50pC	70pC
Channel Capacitance (CS(off), CD(off))	130pF, 130pF	68pF, 68pF
Current - Leakage (IS(off)) (Max)	1nA	3nA
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount
Package / Case	6-WDFN Exposed Pad	5-TSSOP, SC-70-5, SOT-353
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	2 (1 Year)

Engineering Selection Recommendations

The ISL84715IHZ-T is a suitable substitute for the obsolete PI3A4626ZCEX based on the following factors:

Product Status: The ISL84715IHZ-T maintains active production status with Renesas Electronics Corporation, ensuring long-term component availability and supply chain stability compared to the obsolete PI3A4626ZCEX.

Electrical Compatibility: Both devices share identical switch circuit topology (SPST - NO), on-state resistance specification (400mOhm maximum), and operating temperature range (-40°C to 85°C). The supply voltage range of the ISL84715IHZ-T (1.65V to 3.6V) overlaps with the PI3A4626ZCEX specification, with the exception of operation below 1.65V.

Regulatory Compliance: Both components are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Package Consideration: The ISL84715IHZ-T uses SC-70-5 packaging instead of the 6-TDFN package of the original part. PCB layout and footprint modifications are required for implementation.

Performance Variations: The ISL84715IHZ-T exhibits slightly higher charge injection (70pC versus 50pC), lower channel capacitance (68pF versus 130pF), and marginally higher leakage current (3nA versus 1nA). These differences are within acceptable tolerances for most signal switching applications but should be evaluated against specific circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can the ISL84715IHZ-T directly replace the PI3A4626ZCEX without PCB modifications?

A: No. The ISL84715IHZ-T uses SC-70-5 packaging while the PI3A4626ZCEX uses 6-TDFN packaging. Different footprints require PCB layout changes. Pin configuration must be verified before implementation.

Q: What is the minimum supply voltage difference between these parts?

A: The PI3A4626ZCEX operates from 1.5V minimum, while the ISL84715IHZ-T operates from 1.65V minimum. Applications requiring operation below 1.65V cannot use the ISL84715IHZ-T as a substitute.

Q: How do the switching speed specifications compare?

A: The PI3A4626ZCEX specifies 10ns maximum for both Ton and Toff. The ISL84715IHZ-T specifies 12ns maximum for Ton and 8ns maximum for Toff. The ISL84715IHZ-T has slightly slower turn-on but faster turn-off characteristics.

Q: Are there differences in leakage current that affect circuit design?

A: Yes. The ISL84715IHZ-T has a maximum leakage current of 3nA compared to 1nA for the PI3A4626ZCEX. This threefold increase should be evaluated in applications where leakage current is a critical design parameter.

Q: What is the impact of different channel capacitance values?

A: The ISL84715IHZ-T has lower channel capacitance (68pF versus 130pF). This reduces parasitic capacitance effects and may improve high-frequency performance in certain applications, though it also affects charge injection characteristics.

Q: Do both parts have the same moisture sensitivity requirements?

A: No. The PI3A4626ZCEX has MSL 1 (unlimited shelf life), while the ISL84715IHZ-T has MSL 2 (1-year shelf life). The ISL84715IHZ-T requires more stringent moisture control during storage and handling.

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