MAX923EPA Equivalent & Substitute Parts

Part Overview

The MAX923EPA is a dual comparator with integrated voltage reference, manufactured by Analog Devices Inc./Maxim Integrated. This 8-DIP through-hole component operates across single supply (2.5V to 11V) and dual supply (±1.25V to ±5.5V) configurations with CMOS and TTL output compatibility. The device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The MAX923EPA remains available in inventory (1077 pcs), but active alternatives provide extended product lifecycle and improved availability.

Substiute Parts

MAX923EPA

Analog Devices Inc./Maxim IntegratedIn Stock: 1094MAX923EPA Datasheet

Current PartRFQ

MAX923EPA+

Analog Devices Inc./Maxim IntegratedIn Stock: 739MAX923EPA+ Datasheet

DirectRFQ

LTC1442CN8#PBF

Analog Devices Inc.In Stock: 1057LTC1442CN8#PBF Datasheet

MFR RecommendedRFQ

LTC1442IN8#PBF

Analog Devices Inc.In Stock: 913LTC1442IN8#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the MAX923EPA is determined by strict equivalence across the following critical parameters:

Mandatory Matching Criteria:

• Dual comparator configuration (2 elements)
• CMOS and TTL output compatibility
• 8-DIP through-hole package (0.300", 7.62mm)
• Input offset voltage: 10mV @ 5V
• Hysteresis: 50mV
• CMRR and PSRR: 80dB minimum
• RoHS3 compliance

Allowable Parameter Variations:

• Supply voltage range: Substitute may have narrower range (2V ~ 11V acceptable vs. 2.5V ~ 11V)
• Dual supply range: Substitute may have narrower range (±1V ~ 5.5V acceptable vs. ±1.25V ~ 5.5V)
• Output current: Substitute may have lower typical value (40mA acceptable vs. 50mA)
• Quiescent current: Substitute may have lower maximum value (5.7µA acceptable vs. 7.5µA)
• Propagation delay: Substitute may have longer maximum delay (15µs acceptable vs. 12µs)
• Operating temperature: Substitute may have narrower range (0°C ~ 70°C or -40°C ~ 85°C)

Substitute Parts Identified:

1. MAX923EPA+ (direct equivalent, active product status)
2. LTC1442CN8#PBF (manufacturer recommended, active product status)
3. LTC1442IN8#PBF (manufacturer recommended, active product status)

Parameter Comparison

Engineering Selection Recommendations

MAX923EPA+ (Direct Equivalent) The MAX923EPA+ is the direct successor from Analog Devices Inc./Maxim Integrated with active product status. It maintains identical electrical specifications and operating temperature range (-40°C ~ 85°C) as the obsolete MAX923EPA. This part provides the most direct substitution path with no parameter derating required. Selection is appropriate for applications requiring full backward compatibility and extended product lifecycle support.

LTC1442IN8#PBF (Recommended for Extended Temperature Range) The LTC1442IN8#PBF is a manufacturer-recommended alternative from Analog Devices Inc. with active product status and identical operating temperature range (-40°C ~ 85°C). This part exhibits lower quiescent current (5.7µA vs. 7.5µA) and reduced output current (40mA vs. 50mA), making it suitable for power-constrained applications. The 3µs increase in propagation delay (15µs vs. 12µs) is acceptable for most comparator applications. Dual supply voltage range is narrower (±1V vs. ±1.25V minimum), requiring verification for designs operating below ±1.25V.

LTC1442CN8#PBF (Recommended for Commercial Temperature Range) The LTC1442CN8#PBF is a manufacturer-recommended alternative with active product status and commercial operating temperature range (0°C ~ 70°C). This part is suitable for applications not requiring extended low-temperature operation. Electrical characteristics match LTC1442IN8#PBF with lower quiescent and output currents. The narrower operating temperature range and dual supply minimum (±1V) require design verification before selection.

Frequently Asked Questions (FAQ)

Q: Can MAX923EPA+ be used as a direct replacement for MAX923EPA? A: Yes. The MAX923EPA+ is the active equivalent with identical electrical specifications, operating temperature range, and 8-DIP package. No design modifications are required.

Q: What are the key differences between MAX923EPA and LTC1442 series parts? A: The LTC1442 series maintains core comparator functionality (dual elements, CMOS/TTL outputs, 50mV hysteresis, 80dB CMRR/PSRR) but exhibits lower quiescent current (5.7µA vs. 7.5µA), reduced output current (40mA vs. 50mA), and slightly longer propagation delay (15µs vs. 12µs). Supply voltage ranges are narrower for LTC1442 (minimum 2V single supply, ±1V dual supply vs. 2.5V and ±1.25V).

Q: Which substitute part is best for low-temperature applications? A: Both MAX923EPA+ and LTC1442IN8#PBF support -40°C ~ 85°C operating temperature. The LTC1442CN8#PBF is limited to 0°C ~ 70°C and is not suitable for extended low-temperature operation.

Q: Are all substitute parts RoHS3 compliant? A: Yes. MAX923EPA+, LTC1442CN8#PBF, and LTC1442IN8#PBF are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: Can LTC1442 parts be used in designs with dual supply below ±1.25V? A: No. LTC1442 series parts specify minimum dual supply of ±1V, which is narrower than MAX923EPA (±1.25V minimum). Designs operating below ±1.25V require MAX923EPA or MAX923EPA+.

Q: What is the impact of 3µs additional propagation delay in LTC1442 parts? A: The LTC1442 series maximum propagation delay is 15µs compared to 12µs for MAX923EPA. This 3µs difference is negligible for most comparator applications but should be verified for high-speed timing-critical circuits.