ALD2321ASCL Equivalent & Substitute Parts

Part Overview

The ALD2321ASCL is a general-purpose dual comparator IC manufactured by Advanced Linear Devices Inc., housed in a 16-SOIC surface-mount package. This device is classified as an active product with ROHS3 compliance and unlimited moisture sensitivity rating. The ALD2321ASCL serves applications requiring precision voltage comparison with CMOS and TTL-compatible output stages. Substitute parts are identified when equivalent functional performance can be maintained within specified electrical and mechanical tolerances while accommodating different package configurations or supply voltage ranges.

Substiute Parts

ALD2321ASCL

Advanced Linear Devices Inc.In Stock: 1056ALD2321ASCL Datasheet

Current PartRFQ

MAX963ESD+

Analog Devices Inc./Maxim IntegratedIn Stock: 3381MAX963ESD+ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ALD2321ASCL is determined by the following critical parameters:

• Dual comparator configuration: Substitute parts must contain exactly 2 independent comparator elements
• Output compatibility: Output stages must support CMOS and TTL logic levels for direct circuit integration
• Supply voltage range: Substitute parts must operate within or encompass the 4V ~ 10V single supply or ±2V ~ 5V dual supply range
• Input offset voltage: Maximum input offset of 0.2mV @ 5V establishes precision requirements
• Input bias current: Maximum 20pA @ 5V defines input impedance characteristics
• Quiescent current: Maximum 180µA establishes power consumption baseline
• Common-mode and power-supply rejection: CMRR ≥ 80dB and PSRR ≥ 75dB ensure noise immunity
• Package form factor: 16-SOIC surface-mount package with 0.154" width (3.90mm) defines PCB layout compatibility
• Compliance certifications: ROHS3 compliance and MSL 1 rating required for environmental and manufacturing standards

The MAX963ESD+ qualifies as a substitute based on dual-comparator architecture, CMOS/TTL output compatibility, overlapping supply voltage range (2.7V ~ 5.5V encompasses the 4V ~ 10V range), and equivalent ROHS3 compliance. Package differences (14-SOIC vs. 16-SOIC) require PCB layout verification.

Parameter Comparison

Engineering Selection Recommendations

Both the ALD2321ASCL and MAX963ESD+ maintain active product status with ROHS3 compliance and unlimited moisture sensitivity ratings, satisfying current environmental and manufacturing standards. The ALD2321ASCL provides superior input offset voltage specification (0.2mV vs. 1.5mV) and lower input bias current (20pA vs. 15µA), making it the preferred choice for precision applications requiring minimal input signal distortion. The MAX963ESD+ offers extended operating temperature range (-40°C ~ 85°C vs. 0°C ~ 70°C) and higher power-supply rejection ratio (86.02dB vs. 75dB PSRR), suitable for industrial and automotive environments with wider temperature extremes. Package configuration differences (16-SOIC vs. 14-SOIC) require verification of PCB footprint compatibility and pin assignment alignment before substitution.

Frequently Asked Questions (FAQ)

Q: Can the MAX963ESD+ directly replace the ALD2321ASCL in existing designs?

A: Direct replacement requires verification of three factors: (1) PCB footprint compatibility between 16-SOIC and 14-SOIC packages, (2) pin-to-pin functional equivalence for all comparator inputs and outputs, and (3) confirmation that the supply voltage range 2.7V ~ 5.5V encompasses your circuit's operating point. The 16-SOIC package contains additional pins compared to the 14-SOIC; unused pins must be properly handled in the PCB layout.

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

A: The ALD2321ASCL exhibits lower input offset voltage (0.2mV vs. 1.5mV) and lower input bias current (20pA vs. 15µA), resulting in higher precision for low-level signal comparison. The MAX963ESD+ provides higher quiescent current consumption (11mA vs. 180µA) and superior power-supply rejection (86.02dB vs. 75dB PSRR), making it more suitable for noisy power environments.

Q: Are both parts suitable for 5V single-supply operation?

A: Yes. The ALD2321ASCL operates within 4V ~ 10V single supply, and the MAX963ESD+ operates within 2.7V ~ 5.5V single supply. Both encompass 5V nominal operation. However, the ALD2321ASCL also supports ±2V ~ 5V dual supply configuration, which the MAX963ESD+ does not.

Q: What is the impact of different operating temperature ranges?

A: The ALD2321ASCL is rated 0°C ~ 70°C, while the MAX963ESD+ is rated -40°C ~ 85°C. For applications requiring operation below 0°C or above 70°C, the MAX963ESD+ is the only qualified option. For standard commercial temperature ranges (0°C ~ 70°C), both parts are equivalent.

Q: Do both parts meet current compliance requirements?

A: Yes. Both the ALD2321ASCL and MAX963ESD+ are ROHS3 compliant with MSL 1 (unlimited) moisture sensitivity ratings, satisfying current environmental and manufacturing standards for commercial and industrial applications.