MAX944CPD+ Equivalent & Substitute Parts

Part Overview

The MAX944CPD+ is a general-purpose CMOS comparator IC manufactured by Analog Devices Inc./Maxim Integrated, featuring four independent comparator elements in a 14-pin DIP package. This device is designed for applications requiring precision voltage comparison with TTL-compatible push-pull outputs. The MAX944CPD+ is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and production continuity.

Substiute Parts

MAX944CPD+

Analog Devices Inc./Maxim IntegratedIn Stock: 1050MAX944CPD+ Datasheet

Current PartRFQ

MCP6564-E/SL

Microchip TechnologyIn Stock: 2199MCP6564-E/SL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX944CPD+ is determined by the following critical parameters:

• Functional Equivalence: Four independent comparator elements with CMOS and TTL-compatible push-pull output stages
• Electrical Compatibility: Supply voltage range, input offset voltage, input bias current, and propagation delay specifications
• Output Characteristics: Push-pull output capability with TTL logic levels
• Package Compatibility: Pin-compatible or functionally equivalent packaging

The MCP6564-E/SL qualifies as a substitute based on matching the core functional requirements: four comparator elements, CMOS push-pull TTL output architecture, and compatible electrical performance within the specified operating parameters.

Parameter Comparison

Engineering Selection Recommendations

The MCP6564-E/SL is an active product from Microchip Technology and represents a functionally equivalent substitute for the obsolete MAX944CPD+. Both devices are ROHS3 compliant and share identical propagation delay specifications of 80ns maximum.

Key considerations for selection:

• Product Status: The MCP6564-E/SL is active and in production, ensuring long-term availability and supply chain stability compared to the obsolete MAX944CPD+
• Supply Voltage Range: The MCP6564-E/SL supports a wider supply voltage range (1.8V ~ 5.5V) versus the MAX944CPD+ (2.7V ~ 5.5V), providing greater design flexibility
• Quiescent Current: The MCP6564-E/SL draws significantly lower quiescent current (130µA maximum) compared to the MAX944CPD+ (600µA maximum), reducing power consumption
• Input Bias Current: The MCP6564-E/SL exhibits superior input bias current performance (1pA maximum) versus the MAX944CPD+ (0.15µA maximum)
• Package Transition: Migration from 14-DIP through-hole to 14-SOIC surface-mount packaging requires PCB layout modification
• Compliance: Both devices maintain ROHS3 compliance and REACH unaffected status

Frequently Asked Questions (FAQ)

Q: Can the MCP6564-E/SL directly replace the MAX944CPD+ without circuit modifications?

A: Functional substitution is possible due to matching comparator element count, output type, and propagation delay. However, package differences (14-DIP through-hole versus 14-SOIC surface-mount) require PCB redesign. Pin configuration must be verified against device datasheets to ensure correct signal routing.

Q: What are the electrical differences between these devices?

A: The MCP6564-E/SL offers improved specifications in several areas: lower input offset voltage tolerance (10mV versus 2mV), superior input bias current (1pA versus 0.15µA), and reduced quiescent current consumption (130µA versus 600µA). The MCP6564-E/SL also supports a lower minimum supply voltage (1.8V versus 2.7V) and an extended operating temperature range (-40°C to 125°C versus 0°C to 70°C).

Q: Why is the MAX944CPD+ classified as obsolete?

A: The MAX944CPD+ is no longer in active production. The MCP6564-E/SL represents Microchip Technology's active alternative for four-element general-purpose comparator applications with comparable electrical performance and enhanced specifications.

Q: Are there packaging considerations for this substitution?

A: Yes. The MAX944CPD+ uses 14-pin DIP through-hole packaging, while the MCP6564-E/SL uses 14-pin SOIC surface-mount packaging. PCB layout, component placement, and soldering processes differ significantly between these package types. Adapter solutions or complete PCB redesign may be required depending on production volume and design constraints.

Q: Do both devices meet the same compliance standards?

A: Both the MAX944CPD+ and MCP6564-E/SL are ROHS3 compliant and REACH unaffected. Moisture sensitivity level is rated as 1 (Unlimited) for both devices, indicating no special moisture handling requirements during storage or assembly.