MAX985EBT-T Equivalent & Substitute Parts

Part Overview

The MAX985EBT-T is a general-purpose CMOS comparator manufactured by Analog Devices Inc./Maxim Integrated, featuring push-pull, rail-to-rail, and TTL output characteristics in a 6-WLP package. The device operates across a supply voltage range of 2.5V to 5.5V (single supply) or ±1.25V to 2.75V (dual supply), with a maximum input offset voltage of 5mV and propagation delay of 450ns. Currently listed as obsolete, the MAX985EBT-T has 871 units in stock. Due to its obsolete status, equivalent substitute parts from active manufacturers are necessary to ensure long-term design continuity and supply chain reliability.

Substiute Parts

MAX985EBT-T

Analog Devices Inc./Maxim IntegratedIn Stock: 937MAX985EBT-T Datasheet

Current PartRFQ

BU5265HFV-TR

Rohm SemiconductorIn Stock: 18196BU5265HFV-TR Datasheet

MFR RecommendedRFQ

FAN156L6X

onsemiIn Stock: 50313FAN156L6X Datasheet

MFR RecommendedRFQ

LMV7219M7X/NOPB

Texas InstrumentsIn Stock: 17141LMV7219M7X/NOPB Datasheet

MFR RecommendedRFQ

S-89531ACNC-HCCTFU

ABLIC Inc.In Stock: 883S-89531ACNC-HCCTFU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MAX985EBT-T are selected based on the following critical parameters that determine functional equivalence:

Core Substitution Criteria:

• Single-element general-purpose comparator architecture
• CMOS output with push-pull capability
• Rail-to-rail output operation
• Supply voltage range compatibility: minimum 2.5V single supply or equivalent dual supply
• Input offset voltage ≤ 6mV
• Input bias current ≤ 1pA (typical)
• CMRR and PSRR ≥ 80dB
• Operating temperature range: -40°C ~ 85°C
• Surface mount packaging
• ROHS3 compliance and MSL Level 1

The four substitute parts listed below meet these criteria while offering active product status and improved supply chain availability. Package form factors differ (5-HVSOF, 6-MicroPak, SC-70-5, SC88A) but maintain electrical equivalence within the specified parameter tolerances.

Parameter Comparison

Engineering Selection Recommendations

BU5265HFV-TR (Rohm Semiconductor) – Recommended for direct electrical replacement. Maintains 80dB CMRR and PSRR matching the original specification. Extended supply voltage range (1.8V minimum) provides additional design flexibility. Active product status ensures long-term availability. Output current capability of 5mA supports standard logic loads. Propagation delay of 500ns (typical) remains within acceptable margins for general-purpose comparator applications.

FAN156L6X (onsemi) – Suitable for applications prioritizing low quiescent current (17µA maximum). Rail-to-rail output and extended supply range (1.6V minimum) support low-power designs. Propagation delay of 400ns (typical) offers improved speed performance. CMRR of 68dB represents a minor reduction from the original specification but remains adequate for general-purpose applications. Active product status and high inventory availability (50,300 units) provide supply chain security.

LMV7219M7X/NOPB (Texas Instruments) – Optimal for timing-critical applications. Propagation delay of 20ns significantly exceeds the performance of the original device and all other substitutes. CMRR and PSRR of 85dB exceed original specifications. Higher quiescent current (1.8mA maximum) and input bias current (0.95µA) represent trade-offs for superior speed performance. Suitable only when propagation delay is a primary design constraint.

S-89531ACNC-HCCTFU (ABLIC Inc.) – Applicable for ultra-low supply voltage applications (0.9V minimum). Input offset voltage and bias current specifications match the original device. Extended supply range supports battery-powered and energy-harvesting designs. Propagation delay of 280µs is significantly longer than the original specification and other substitutes, limiting use to low-frequency applications. CMRR of 65dB and PSRR of 75dB represent reductions from original specifications.

All substitute parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can BU5265HFV-TR directly replace MAX985EBT-T in existing PCB layouts?

A: No. While BU5265HFV-TR provides electrical equivalence, the package differs (SOT-665 versus 6-WFBGA). PCB layout modifications and potential re-qualification of thermal characteristics are required. Verify pin-to-pin compatibility and signal routing before implementation.

Q: Which substitute offers the closest electrical match to the original MAX985EBT-T?

A: BU5265HFV-TR provides the closest match, maintaining identical CMRR and PSRR specifications (80dB each) and comparable propagation delay performance (500ns typical versus 450ns maximum). Active product status and established supply chain support make it the primary recommendation for direct replacement applications.

Q: Is LMV7219M7X/NOPB suitable for general-purpose comparator applications?

A: LMV7219M7X/NOPB is suitable only for applications where propagation delay is a critical design parameter. The 20ns propagation delay significantly exceeds the performance requirements of most general-purpose comparator circuits. Higher quiescent current consumption (1.8mA) may impact power budget in battery-powered designs. Evaluate timing requirements before selection.

Q: What are the supply voltage compatibility considerations for each substitute?

A: BU5265HFV-TR (1.8V ~ 5.5V), FAN156L6X (1.6V ~ 5.5V), and S-89531ACNC-HCCTFU (0.9V ~ 5.5V) all support the original 2.5V ~ 5.5V range. LMV7219M7X/NOPB operates from 2.7V ~ 5V, which is compatible with the original specification. For designs operating below 2.7V, LMV7219M7X/NOPB is not suitable.

Q: How do package differences affect substitution decisions?

A: Package selection depends on PCB layout constraints and manufacturing capabilities. 6-WFBGA (original) requires BGA assembly equipment. SOT-665, 6-UFDFN, and SC-70-5 packages are standard surface-mount options with different footprint areas and thermal characteristics. Verify assembly process compatibility and thermal performance requirements before package selection.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All four substitute parts carry ROHS3 compliance certification and MSL Level 1 rating, meeting standard environmental and reliability requirements for commercial and industrial applications.

Q: What is the impact of propagation delay differences on circuit performance?

A: The original MAX985EBT-T specifies 450ns maximum propagation delay. BU5265HFV-TR (500ns typical) and FAN156L6X (400ns typical) remain within acceptable ranges for general-purpose applications. S-89531ACNC-HCCTFU (280µs) is unsuitable for applications requiring response times below 1ms. LMV7219M7X/NOPB (20ns) is appropriate only for high-speed comparator circuits.