PI5A4599ATEX Equivalent & Substitute Parts

Part Overview

The PI5A4599ATEX is a single-circuit SPDT (Single Pole Double Throw) analog switch manufactured by Diodes Incorporated, designed for 2:1 multiplexing applications in SOT-23-6 surface mount packaging. This component operates across a 2V to 6V single supply voltage range with an on-state resistance of 8Ω and switching times of 15ns (Ton) and 10ns (Toff). The product is currently obsolete, necessitating identification of functionally equivalent alternatives from active product lines to maintain design continuity and ensure long-term component availability.

Key Parameters

Parameter	PI5A4599ATEX
Switch Circuit	SPDT
Multiplexer/Demultiplexer Circuit	2:1
Number of Circuits	1
On-State Resistance (Max)	8Ω
Channel-to-Channel Matching (ΔRon)	100mΩ
Voltage - Supply, Single (V+)	2V ~ 6V
Switch Time Ton (Max)	15ns
Switch Time Toff (Max)	10ns
-3dB Bandwidth	30MHz
Charge Injection	1.5pC
Channel Capacitance (CS(off), CD(off))	5pF, 5pF
Current - Leakage (IS(off)) (Max)	1nA
Crosstalk	-80dB @ 1MHz
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	SOT-23-6
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the PI5A4599ATEX is determined by the following core electrical and mechanical criteria:

Mandatory Compatibility Parameters:

Switch topology: SPDT 2:1 multiplexer configuration with single circuit
Package type: SOT-23-6 surface mount
Operating temperature range: -40°C to 85°C
Supply voltage overlap: Substitute must support the 2V to 6V range or a superset thereof
RoHS3 compliance and MSL rating

Performance Tolerance Parameters:

On-state resistance: Substitutes with higher Ron values are acceptable if circuit design accommodates increased insertion loss
Switch timing: Substitutes with longer switching times are acceptable if application timing margins permit
Charge injection and capacitance: Higher values acceptable if signal integrity requirements are met
Leakage current: Higher values acceptable within application specifications

The substitute parts MAX4561EUT+ and MAX4561EUT+T (70Ω Ron) and MAX4599EUT+T (60Ω Ron) maintain the required SPDT 2:1 topology and SOT-23-6 packaging. All substitutes are active products with full RoHS3 compliance and MSL 1 rating, ensuring long-term availability and regulatory compliance.

Parameter Comparison

Parameter	PI5A4599ATEX	MAX4561EUT+	MAX4561EUT+T	MAX4599EUT+T
Switch Circuit	SPDT	SPDT	SPDT	SPDT
Multiplexer/Demultiplexer Circuit	2:1	2:1	2:1	2:1
Number of Circuits	1	1	1	1
On-State Resistance (Max)	8Ω	70Ω	70Ω	60Ω
Channel-to-Channel Matching (ΔRon)	100mΩ	500mΩ	500mΩ	200mΩ
Voltage - Supply, Single (V+)	2V ~ 6V	1.8V ~ 12V	1.8V ~ 12V	2V ~ 5.5V
Switch Time Ton (Max)	15ns	150ns	150ns	30ns
Switch Time Toff (Max)	10ns	80ns	80ns	25ns
Charge Injection	1.5pC	17pC	17pC	3pC
Current - Leakage (IS(off)) (Max)	1nA	500pA	500pA	500pA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	SOT-23-6	SOT-23-6	SOT-23-6	SOT-23-6
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

MAX4599EUT+T is the primary substitute for the PI5A4599ATEX. This part maintains the closest electrical performance profile with 60Ω on-state resistance, 200mΩ channel matching, and switching times of 30ns (Ton) and 25ns (Toff). The supply voltage range of 2V to 5.5V fully encompasses the original 2V to 6V specification within the lower bound. The MAX4599EUT+T is an active product with full RoHS3 compliance, MSL 1 rating, and 12,401 units in stock, ensuring immediate availability and long-term supply continuity.

MAX4561EUT+T serves as a secondary substitute when extended supply voltage range (1.8V to 12V) is required or when higher on-state resistance (70Ω) is acceptable within circuit design margins. This variant offers the same packaging and compliance certifications with 20,200 units in stock.

MAX4561EUT+ (without tape/reel packaging) is functionally equivalent to MAX4561EUT+T but supplied in alternative packaging format with 5,497 units available.

All three substitutes are manufactured by Analog Devices Inc./Maxim Integrated, a tier-1 semiconductor supplier, ensuring design support, documentation, and long-term product lifecycle management.

Frequently Asked Questions (FAQ)

Q: Can MAX4599EUT+T directly replace PI5A4599ATEX without circuit modification?

A: Direct replacement is possible if the application circuit accommodates the increased on-state resistance (60Ω versus 8Ω) and slightly longer switching times (30ns/25ns versus 15ns/10ns). The SOT-23-6 pinout is identical, and the supply voltage range 2V to 5.5V covers the original 2V to 6V specification. Verify that signal integrity and insertion loss requirements are met with the higher Ron value.

Q: What is the difference between MAX4561EUT+ and MAX4561EUT+T?

A: Both parts are electrically identical SPDT 2:1 switches with 70Ω on-state resistance. The primary difference is packaging: MAX4561EUT+T is supplied in Cut Tape (CT) and Digi-Reel format with 20,200 units in stock, while MAX4561EUT+ is supplied in alternative packaging with 5,497 units available. Select based on procurement and assembly requirements.

Q: Why does MAX4599EUT+T have lower on-state resistance than MAX4561EUT+?

A: The MAX4599EUT+T is optimized for lower insertion loss applications with 60Ω Ron and superior switching performance (30ns/25ns), while MAX4561EUT+ is designed for general-purpose switching with 70Ω Ron and extended supply voltage range (1.8V to 12V). Select MAX4599EUT+T for performance-critical applications and MAX4561EUT+ for applications requiring wider supply voltage tolerance.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. PI5A4599ATEX, MAX4561EUT+, MAX4561EUT+T, and MAX4599EUT+T are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, meeting current regulatory requirements for commercial and industrial applications.

Q: What is the impact of higher charge injection in MAX4561 variants?

A: MAX4561EUT+ and MAX4561EUT+T have 17pC charge injection compared to 1.5pC in PI5A4599ATEX. This parameter affects signal settling time and distortion in precision analog applications. If the original design operated near charge injection limits, MAX4599EUT+T (3pC) is the preferred substitute to minimize performance degradation.

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