PI5A4684GAEX Equivalent & Substitute Parts

Part Overview

The PI5A4684GAEX is a 2-circuit SPDT IC switch manufactured by Diodes Incorporated, designed for signal routing and multiplexing applications in low-voltage systems. This component features a 600mOhm on-state resistance and operates across a 1.8V to 5.5V supply range, making it suitable for mixed-signal interface applications.

The PI5A4684GAEX is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this component.

Key Parameters

Parameter	Value
Switch Circuit Configuration	SPDT (Single Pole Double Throw)
Number of Circuits	2
Multiplexer/Demultiplexer Circuit	2:1
On-State Resistance (Max)	600mOhm
Channel-to-Channel Matching (ΔRon)	10mOhm
Voltage - Supply, Single (V+)	1.8V ~ 5.5V
Switch Time (Ton, Toff)	60ns, 20ns (Max)
-3dB Bandwidth	27MHz
Charge Injection	54pC
Channel Capacitance (CS(off), CD(off))	84pF
Current - Leakage (IS(off)) (Max)	80nA
Crosstalk	-70dB @ 100kHz
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	10-WFBGA, CSPBGA
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the PI5A4684GAEX is determined by the following critical parameters:

Switch circuit topology (SPDT configuration with 2:1 multiplexing)
Number of independent circuits (2 circuits)
On-state resistance compatibility (600mOhm maximum)
Supply voltage range overlap (minimum 1.8V to 5.5V operation)
Package compatibility (10-pin surface mount BGA)
Operating temperature range (-40°C to 85°C)
RoHS3 compliance and MSL rating

The DG3535DB-T5-E1 qualifies as a substitute based on matching SPDT 2:1 topology, dual-circuit configuration, and compatible surface-mount packaging. However, the substitute operates within a narrower supply voltage range (2.7V to 3.3V) and exhibits lower on-state resistance (400mOhm), which represents an improvement in performance characteristics while maintaining functional equivalence for applications within the overlapping voltage specification.

Parameter Comparison

Parameter	PI5A4684GAEX	DG3535DB-T5-E1
Manufacturer	Diodes Incorporated	Vishay Siliconix
Product Status	Obsolete	Active
Switch Circuit	SPDT	SPDT
Number of Circuits	2	2
Multiplexer/Demultiplexer Circuit	2:1	2:1
On-State Resistance (Max)	600mOhm	400mOhm
Channel-to-Channel Matching (ΔRon)	10mOhm	50mOhm (Max)
Voltage - Supply, Single (V+)	1.8V ~ 5.5V	2.7V ~ 3.3V
Switch Time (Ton, Toff) (Max)	60ns, 20ns	82ns, 73ns
Charge Injection	54pC	21pC
Channel Capacitance (CS(off), CD(off))	84pF	145pF
Current - Leakage (IS(off)) (Max)	80nA	2nA
Crosstalk	-70dB @ 100kHz	-69dB @ 100kHz
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	10-WFBGA, CSPBGA	10-WFBGA
Mounting Type	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The DG3535DB-T5-E1 is an active product with current manufacturing support, addressing the obsolescence status of the PI5A4684GAEX. Both components maintain ROHS3 compliance and MSL Level 1 ratings, ensuring equivalent environmental and regulatory standing.

Selection of the DG3535DB-T5-E1 requires verification that the application operates within the 2.7V to 3.3V supply range. Applications requiring the full 1.8V to 5.5V range of the PI5A4684GAEX cannot use this substitute without circuit redesign. The DG3535DB-T5-E1 offers superior leakage current performance (2nA versus 80nA) and lower charge injection (21pC versus 54pC), which may provide benefits in low-power and high-frequency applications.

Frequently Asked Questions (FAQ)

Q: Can the DG3535DB-T5-E1 directly replace the PI5A4684GAEX in all applications?

A: Direct replacement is possible only in applications operating within the 2.7V to 3.3V supply voltage range. The PI5A4684GAEX supports 1.8V operation, which the DG3535DB-T5-E1 does not. Circuit redesign or voltage regulation may be required for applications requiring lower supply voltages.

Q: What are the key differences in electrical performance between these parts?

A: The DG3535DB-T5-E1 exhibits lower on-state resistance (400mOhm versus 600mOhm), significantly lower leakage current (2nA versus 80nA), and reduced charge injection (21pC versus 54pC). The PI5A4684GAEX provides tighter channel-to-channel matching (10mOhm versus 50mOhm) and lower channel capacitance (84pF versus 145pF).

Q: Are the packages physically compatible?

A: Both components use 10-pin surface-mount BGA packaging. The PI5A4684GAEX is specified as 10-WFBGA or CSPBGA (2.07x1.55mm), while the DG3535DB-T5-E1 uses 10-WFBGA (2x1.5mm). Physical dimensions are similar, but PCB layout and reflow profiles should be verified with manufacturer documentation.

Q: What is the compliance status of both parts?

A: Both the PI5A4684GAEX and DG3535DB-T5-E1 are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8542.39.0001. Both maintain MSL Level 1 (unlimited moisture sensitivity).

Q: Why is the PI5A4684GAEX obsolete?

A: The PI5A4684GAEX is classified as obsolete by the manufacturer. The DG3535DB-T5-E1 represents an active alternative with ongoing manufacturing support and improved performance characteristics in key parameters such as leakage current and charge injection.

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