ALD2302SAL Equivalent & Substitute Parts

Part Overview

The ALD2302SAL is a general-purpose dual comparator IC manufactured by Advanced Linear Devices Inc., packaged in 8-SOIC surface-mount configuration. This device features CMOS, NMOS, Push-Pull, and TTL output types with a supply voltage range of 4V to 10V (single supply) or ±2V to ±5V (dual supply). The part is currently active in production with ROHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent functional performance can be achieved within the allowed electrical and mechanical parameters of the general-purpose comparator category. Substitution is necessary when the primary part is unavailable, when alternative packaging or temperature ranges better suit application requirements, or when supply chain optimization is required.

Key Parameters

Parameter	ALD2302SAL Value
Manufacturer	Advanced Linear Devices Inc.
Category	Linear - Comparator
Type	General Purpose
Number of Elements	2
Output Type	CMOS, NMOS, Push-Pull, TTL
Voltage - Supply (Single/Dual)	4V ~ 10V, ±2V ~ 5V
Voltage - Input Offset (Max)	4mV @ 5V
Current - Input Bias (Max)	0.001µA @ 5V
Current - Output (Typ)	60mA
Current - Quiescent (Max)	500µA
Operating Temperature	0°C ~ 70°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the ALD2302SAL are grouped based on the following substitution criteria:

Primary Substitution Parameters:

Dual comparator configuration (2 elements)
General-purpose comparator function
Surface-mount packaging (8-pin variants)
Output type compatibility (Push-Pull, Rail-to-Rail, or TTL capable)
Supply voltage overlap with 4V ~ 10V range
Operating temperature range that encompasses or extends the 0°C ~ 70°C specification
ROHS3 compliance and MSL 1 rating

Packaging Variants Allowed:

8-SOIC (primary package match)
8-SOP (functionally equivalent footprint)
8-DFN (2x2) (smaller footprint alternative)
SOT-23-8 (compact alternative)
8-uMAX/uSOP (ultra-compact alternative)

Substitutes are organized by package type and electrical performance tier. All listed substitutes maintain the dual-element comparator architecture and general-purpose classification required for direct functional replacement.

Parameter Comparison

Parameter	ALD2302SAL	BU7232F-E2	LTC6702CDC#TRMPBF	LTC6702HDC#TRPBF	MAX9017AEKA+T	MAX9022ASA+	MAX9022ASA+T	MAX9032ASA+	MAX9032ASA+T	MAX976EUA+	MAX989ESA+
Manufacturer	Advanced Linear Devices Inc.	Rohm Semiconductor	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc./Maxim	Analog Devices Inc./Maxim	Analog Devices Inc./Maxim	Analog Devices Inc./Maxim	Analog Devices Inc./Maxim	Analog Devices Inc./Maxim	Analog Devices Inc./Maxim
Number of Elements	2	2	2	2	2	2	2	2	2	2	2
Output Type	CMOS, NMOS, Push-Pull, TTL	Push-Pull	CMOS, Push-Pull, Rail-to-Rail, TTL	CMOS, Push-Pull, Rail-to-Rail, TTL	CMOS, Push-Pull, Rail-to-Rail	CMOS, Rail-to-Rail, TTL	CMOS, Rail-to-Rail, TTL	Push-Pull, Rail-to-Rail	Push-Pull, Rail-to-Rail	Push-Pull, Rail-to-Rail	CMOS, Push-Pull, Rail-to-Rail, TTL
Voltage - Supply (Single/Dual)	4V ~ 10V, ±2V ~ 5V	1.8V ~ 5.5V, ±0.9V ~ 2.75V	1.7V ~ 5.5V	1.7V ~ 5.5V	1.8V ~ 5.5V	2.5V ~ 5.5V, ±1.25V ~ 2.75V	2.5V ~ 5.5V, ±1.25V ~ 2.75V	2.5V ~ 5.5V	2.5V ~ 5.5V	2.7V ~ 5.5V	2.5V ~ 5.5V, ±1.25V ~ 2.75V
Voltage - Input Offset (Max)	4mV @ 5V	11mV @ 3V	4.6mV @ 3V	4.6mV @ 3V	5mV @ 5V	1mV @ 5V	1mV @ 5V	1mV @ 5V	1mV @ 5V	2mV @ 5V	5mV @ 5.5V
Current - Input Bias (Max)	0.001µA @ 5V	1pA @ 3V	—	—	0.001µA @ 5V	0.003µA @ 5V	0.003µA @ 5V	0.008µA @ 5V	0.008µA @ 5V	0.075µA @ 5.5V	1pA @ 5.5V
Current - Quiescent (Max)	500µA	25µA	32µA	32µA	2.8µA	5µA	5µA	55µA	55µA	650µA	24µA
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm)	8-SOP (0.173", 4.40mm)	8-WFDFN Exposed Pad	8-WFDFN Exposed Pad	SOT-23-8	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-TSSOP/MSOP (0.118", 3.00mm)	8-SOIC (0.154", 3.90mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All listed substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the environmental and regulatory requirements of the ALD2302SAL.

Direct Package Match (8-SOIC): MAX9022ASA+, MAX9022ASA+T, MAX9032ASA+, MAX9032ASA+T, and MAX989ESA+ are pin-compatible 8-SOIC packages requiring no PCB layout modification. These parts are suitable for direct socket replacement when supply voltage and temperature range requirements are met.

Extended Temperature Range: LTC6702HDC#TRPBF, MAX9022ASA+, MAX9022ASA+T, MAX9032ASA+, and MAX9032ASA+T support -40°C to 125°C operating range, exceeding the ALD2302SAL specification. These are appropriate for applications requiring extended temperature performance.

Compact Packaging Alternatives: LTC6702CDC#TRMPBF and LTC6702HDC#TRPBF (8-DFN 2x2) and MAX976EUA+ (8-uMAX/uSOP) provide reduced footprint options for space-constrained designs. PCB layout modification is required for these packages.

Low Quiescent Current: MAX9017AEKA+T (2.8µA), MAX9022ASA+ and MAX9022ASA+T (5µA), and LTC6702CDC#TRMPBF and LTC6702HDC#TRPBF (32µA) offer significantly lower quiescent current than the ALD2302SAL (500µA), suitable for battery-powered or low-power applications.

Supply Voltage Compatibility: BU7232F-E2 (1.8V ~ 5.5V), LTC6702CDC#TRMPBF and LTC6702HDC#TRPBF (1.7V ~ 5.5V), and MAX9017AEKA+T (1.8V ~ 5.5V) support lower minimum supply voltages. MAX9022ASA+, MAX9022ASA+T, MAX9032ASA+, MAX9032ASA+T, and MAX989ESA+ support 2.5V minimum, which overlaps with the ALD2302SAL 4V minimum specification.

Frequently Asked Questions (FAQ)

Q: Can MAX9022ASA+ directly replace ALD2302SAL without PCB modification?

A: Yes. Both parts use 8-SOIC packaging with identical pin spacing (0.154", 3.90mm width). Pin-to-pin compatibility exists for dual comparator function. Verify supply voltage and temperature range requirements for your application before substitution.

Q: What is the key difference between LTC6702CDC#TRMPBF and LTC6702HDC#TRPBF?

A: Both use 8-DFN (2x2) packaging and share identical electrical specifications. The primary difference is operating temperature range: LTC6702CDC#TRMPBF operates 0°C to 70°C (matching ALD2302SAL), while LTC6702HDC#TRPBF extends to -40°C to 125°C. Hysteresis also differs slightly (7.2mV vs. 8.2mV).

Q: Is BU7232F-E2 suitable for 4V supply applications?

A: No. BU7232F-E2 minimum supply voltage is 1.8V, but this does not guarantee performance at the ALD2302SAL's 4V minimum specification. Verify datasheet operating conditions at your specific supply voltage before selection.

Q: Why do some substitutes have lower quiescent current than ALD2302SAL?

A: Quiescent current varies based on internal circuit design and process technology. Lower values (e.g., MAX9017AEKA+T at 2.8µA vs. ALD2302SAL at 500µA) reflect more efficient power management, beneficial for battery-powered designs. This does not affect functional comparator performance.

Q: Can I use MAX976EUA+ in place of ALD2302SAL?

A: MAX976EUA+ is functionally equivalent but uses 8-uMAX/uSOP packaging (0.118", 3.00mm width), which is physically smaller than 8-SOIC. PCB layout redesign is required. Electrical performance is compatible within specified ranges.

Q: What does "Rail-to-Rail" output mean in the context of these comparators?

A: Rail-to-Rail output capability means the comparator output can swing to both positive and negative supply rails (or ground and positive supply in single-supply mode), maximizing output voltage swing. This is a performance advantage but does not affect basic comparator substitution compatibility.

Q: Are all listed substitutes available in the same packaging options (Tube vs. Tape & Reel)?

A: No. Packaging format varies by part number. MAX9022ASA+ and MAX9032ASA+ are supplied in Tube; MAX9022ASA+T, MAX9032ASA+T, and MAX989ESA+ are supplied in Tape & Reel (TR). Verify packaging availability with your supplier before ordering.

Q: Does lower input offset voltage guarantee better performance?

A: Lower input offset voltage (e.g., MAX9022ASA+ at 1mV vs. ALD2302SAL at 4mV) indicates tighter input matching and reduced error in comparison operations. For general-purpose applications, both specifications are acceptable. Critical precision applications benefit from lower offset values.

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