PI5A4626TEX Equivalent & Substitute Parts

Part Overview

The PI5A4626TEX is a single-circuit SPST-NO analog switch manufactured by Diodes Incorporated in SOT-23-5 packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The device operates across a 1.8V to 5.5V supply range with a maximum on-state resistance of 900mOhm and is suitable for signal routing and multiplexing applications in low-voltage systems.

Key Parameters

Parameter	Value
Manufacturer Part Number	PI5A4626TEX
Manufacturer	Diodes Incorporated
Switch Circuit	SPST - NO
Multiplexer/Demultiplexer Circuit	1:1
Number of Circuits	1
On-State Resistance (Max)	900mOhm
Channel-to-Channel Matching (ΔRon)	30mOhm
Voltage - Supply, Single (V+)	1.8V ~ 5.5V
Switch Time (Ton, Toff) (Max)	35ns, 20ns
Charge Injection	40pC
Channel Capacitance (CS(off), CD(off))	83pF, 83pF
Current - Leakage (IS(off)) (Max)	4nA
Crosstalk	-57dB @ 1MHz
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	SC-74A, SOT-753
Supplier Device Package	SOT-23-5
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the PI5A4626TEX is determined by the following critical parameters:

Switch topology: SPST-NO single-circuit configuration
Supply voltage compatibility: Minimum 1.8V operation required
On-state resistance: 900mOhm baseline; lower resistance values acceptable for improved performance
Package compatibility: SOT-23-5 or SC-74A preferred for direct board-level replacement
Operating temperature range: -40°C to 85°C minimum
Leakage current and charge injection characteristics for signal integrity

Substitute parts are grouped into two categories:

Category A - Direct Package Replacement (SOT-23-5): MAX4626EUK+T and SN74AUC1G66DBVR maintain identical packaging for direct PCB substitution.

Category B - Functional Equivalents (SC-74A/SOT-753): Nexperia 74-series devices (74AHC1G66GV,125; 74AHCT1G66GV,125; 74HC1G66GV,125; 74HCT1G66GV,125; 74HCT1G66GV-Q100H; 74LVC1G66GV,125), Rohm BU4S66G2-TR, and Texas Instruments TS5A3166DCKR provide functional equivalence with SC-74A packaging.

Parameter Comparison

Part Number	Manufacturer	Switch Circuit	On-State Resistance (Max)	Voltage - Supply (V+)	Switch Time Ton/Toff (Max)	Charge Injection	Channel Capacitance (CS/CD)	Current - Leakage (Max)	Operating Temp	Package	Product Status
PI5A4626TEX	Diodes Incorporated	SPST - NO	900mOhm	1.8V ~ 5.5V	35ns, 20ns	40pC	83pF, 83pF	4nA	-40°C ~ 85°C	SOT-23-5	Obsolete
MAX4626EUK+T	Analog Devices Inc./Maxim Integrated	SPST - NO	500mOhm	1.8V ~ 5.5V	50ns, 30ns	40pC	65pF, 65pF	2nA	-40°C ~ 85°C	SOT-23-5	Active
SN74AUC1G66DBVR	Texas Instruments	SPST - NO	15Ohm	0.8V ~ 2.7V	1.4ns, 1.5ns	—	4.6pF	1µA	-40°C ~ 85°C	SOT-23-5	Active
74AHC1G66GV,125	Nexperia USA Inc.	SPST - NO	22Ohm	2V ~ 5.5V	11ns, 11ns	—	10pF	100nA	-40°C ~ 125°C	SC-74A	Active
74AHCT1G66GV,125	Nexperia USA Inc.	SPST - NO	22Ohm	4.5V ~ 5.5V	11ns, 11ns	—	10pF	100nA	-40°C ~ 125°C	SC-74A	Active
74HC1G66GV,125	Nexperia USA Inc.	SPST - NO	80Ohm	2V ~ 10V	20ns, 20ns	—	—	1µA	-40°C ~ 125°C	SC-74A	Active
74HCT1G66GV,125	Nexperia USA Inc.	SPST - NO	95Ohm	4.5V ~ 5.5V	30ns, 44ns	—	—	1µA	-40°C ~ 125°C	SC-74A	Active
74HCT1G66GV-Q100H	Nexperia USA Inc.	SPST - NO	95Ohm	4.5V ~ 5.5V	30ns, 44ns	—	—	1µA	-40°C ~ 125°C	SC-74A	Active
74LVC1G66GV,125	Nexperia USA Inc.	SPST - NO	10Ohm	1.65V ~ 5.5V	4.2ns, 5ns	7.5pC	6.5pF	5µA	-40°C ~ 125°C	SC-74A	Active
BU4S66G2-TR	Rohm Semiconductor	SPST - NO	280Ohm	3V ~ 18V	—	—	10pF	300nA	-40°C ~ 85°C	5-SSOP	Active
TS5A3166DCKR	Texas Instruments	SPST - NO	900mOhm	1.65V ~ 5.5V	7ns, 11.5ns	1pC	19pF, 18pF	20nA	-40°C ~ 85°C	SC-70-5	Active

Engineering Selection Recommendations

For Direct SOT-23-5 Package Replacement:

MAX4626EUK+T is the primary active substitute. It maintains identical packaging and supply voltage range (1.8V ~ 5.5V) with improved on-state resistance (500mOhm versus 900mOhm), lower leakage current (2nA versus 4nA), and active product status. Operating temperature range matches the original part (-40°C to 85°C).

SN74AUC1G66DBVR provides SOT-23-5 packaging with superior switching speed (1.4ns/1.5ns) and lower on-state resistance (15Ohm). However, its supply voltage range (0.8V ~ 2.7V) does not fully overlap the PI5A4626TEX specification, limiting applicability to lower-voltage designs.

For SC-74A Package Substitution:

74LVC1G66GV,125 (Nexperia) offers the closest performance match with extended supply range (1.65V ~ 5.5V), lowest on-state resistance (10Ohm), and fastest switching (4.2ns/5ns). Extended operating temperature to 125°C provides additional margin.

74HC1G66GV,125 (Nexperia) supports the widest supply voltage range (2V ~ 10V) and is suitable for applications requiring higher supply voltages. On-state resistance of 80Ohm remains acceptable for most signal routing applications.

74HCT1G66GV,125 and 74HCT1G66GV-Q100H (Nexperia) are restricted to 4.5V ~ 5.5V supply range. The Q100H variant includes AEC-Q100 automotive qualification for applications requiring automotive-grade components.

For Alternative Package Formats:

TS5A3166DCKR (Texas Instruments) in SC-70-5 packaging matches the original 900mOhm on-state resistance with superior switching performance (7ns/11.5ns) and lower charge injection (1pC). Extended supply range (1.65V ~ 5.5V) and active status support long-term availability.

BU4S66G2-TR (Rohm Semiconductor) in 5-SSOP packaging operates across 3V ~ 18V, making it suitable for higher-voltage applications. On-state resistance of 280Ohm and operating temperature limit (-40°C to 85°C) align with the original specification.

All substitute parts maintain ROHS3 compliance, MSL Level 1 (unlimited moisture sensitivity), and EAR99 export classification consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can MAX4626EUK+T directly replace PI5A4626TEX on the PCB?

A: Yes. Both parts use SOT-23-5 packaging with identical pin configuration. MAX4626EUK+T operates across the same 1.8V ~ 5.5V supply range and maintains -40°C to 85°C operating temperature. The lower on-state resistance (500mOhm) and leakage current (2nA) represent performance improvements.

Q: What is the difference between 74AHC1G66GV,125 and 74AHCT1G66GV,125?

A: Both are Nexperia devices with identical on-state resistance (22Ohm) and switching speed (11ns). The primary difference is supply voltage range: 74AHC1G66GV,125 operates from 2V ~ 5.5V, while 74AHCT1G66GV,125 is restricted to 4.5V ~ 5.5V. Select based on your system's minimum supply voltage.

Q: Why does SN74AUC1G66DBVR have a lower supply voltage range than the original part?

A: SN74AUC1G66DBVR is optimized for ultra-low-voltage applications (0.8V ~ 2.7V). While it provides superior switching performance and lower on-state resistance, its maximum supply voltage of 2.7V does not support systems requiring 3.3V or 5V operation. Use only in designs operating within its specified range.

Q: Is 74LVC1G66GV,125 suitable for all applications requiring PI5A4626TEX?

A: 74LVC1G66GV,125 is compatible with applications operating between 1.65V and 5.5V. Its superior performance characteristics (10Ohm on-state resistance, 4.2ns switching time) and extended operating temperature (-40°C to 125°C) make it suitable for most signal routing and multiplexing applications. Verify charge injection and capacitance specifications for precision analog applications.

Q: What is the advantage of TS5A3166DCKR over other substitutes?

A: TS5A3166DCKR matches the original 900mOhm on-state resistance while providing faster switching (7ns/11.5ns), lower charge injection (1pC), and lower leakage current (20nA). SC-70-5 packaging is smaller than SOT-23-5, requiring PCB layout modification. Extended supply range (1.65V ~ 5.5V) supports diverse voltage systems.

Q: Can BU4S66G2-TR replace PI5A4626TEX in a 5V system?

A: Yes. BU4S66G2-TR operates across 3V ~ 18V, fully supporting 5V systems. However, its 5-SSOP package differs from the original SOT-23-5, requiring PCB redesign. On-state resistance of 280Ohm is higher than the original 900mOhm specification, which may impact signal integrity in high-impedance circuits.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL Level 1 (unlimited) moisture sensitivity rating, consistent with the original PI5A4626TEX specification.

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

A: 74LVC1G66GV,125 and 74AHC1G66GV,125 from Nexperia, along with MAX4626EUK+T from Analog Devices, maintain active product status with high inventory levels, supporting long-term design continuity.

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