MCP6549T-I/ST Equivalent & Substitute Parts

Part Overview

The MCP6549T-I/ST is a general-purpose CMOS comparator manufactured by Microchip Technology, featuring four independent comparator elements in a 14-TSSOP surface-mount package. This active product operates across a single supply voltage range of 1.6V to 5.5V with open-drain, rail-to-rail, and TTL-compatible output characteristics. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, design flexibility, or packaging preferences while maintaining functional equivalence in circuit applications.

Key Parameters

Parameter	Value
Manufacturer	Microchip Technology
Part Number	MCP6549T-I/ST
Category	Linear - Comparator
Type	General Purpose
Number of Elements	4
Output Type	CMOS, Open-Drain, Rail-to-Rail, TTL
Supply Voltage Range	1.6V ~ 5.5V
Package / Case	14-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 85°C
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the MCP6549T-I/ST is determined by the following critical parameters:

Primary Substitution Criteria:

Number of comparator elements: 4
Package type: 14-TSSOP surface-mount
Supply voltage compatibility: Minimum 1.6V operation required
Output type: Open-drain or rail-to-rail capability
Operating temperature range: -40°C minimum to 85°C maximum
RoHS3 compliance and REACH unaffected status

Packaging Variation: The MCP6549-I/ST differs only in packaging format (Tube vs. Tape & Reel) while maintaining identical electrical specifications and the same 14-TSSOP footprint.

Functional Equivalents: APX339TSG-13, TLV3404CD, and TS884IPT provide comparable general-purpose comparator functionality within the 14-pin TSSOP package family, though with variations in output type, supply voltage range, and performance characteristics that must be evaluated for specific circuit requirements.

Parameter Comparison

Parameter	MCP6549T-I/ST	MCP6549-I/ST	APX339TSG-13	TLV3404CD	TS884IPT
Manufacturer	Microchip Technology	Microchip Technology	Diodes Incorporated	Texas Instruments	STMicroelectronics
Number of Elements	4	4	4	4	4
Supply Voltage Range	1.6V ~ 5.5V	1.6V ~ 5.5V	2.5V ~ 5.5V	2.5V ~ 16V, ±1.25V ~ 8V	1.1V ~ 5.5V
Output Type	CMOS, Open-Drain, Rail-to-Rail, TTL	CMOS, Open-Drain, Rail-to-Rail, TTL	Open-Drain, Rail-to-Rail	CMOS, Open-Drain	Push-Pull
Voltage - Input Offset (Max)	7mV @ 5.5V	7mV @ 5.5V	7mV @ 5V	3.6mV @ 15V	6mV @ 5V
Current - Input Bias (Max)	1pA @ 5.5V	1pA @ 5.5V	0.25µA @ 5V	250pA @ 15V	10pA
Current - Output (Typ)	30mA	30mA	60mA @ 5V	10mA	-
Current - Quiescent (Max)	1µA	1µA	300µA	950nA	500nA
Propagation Delay (Max)	8µs	8µs	600ns	300µs	16µs
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 125°C
Package / Case	14-TSSOP	14-TSSOP	14-TSSOP	14-SOIC	14-TSSOP
Product Status	Active	Active	Active	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Substitution (Identical Specifications): MCP6549-I/ST is a direct functional equivalent differing only in packaging format (Tube instead of Tape & Reel). Both parts maintain identical electrical performance and 14-TSSOP footprint compatibility. Selection between these variants depends solely on packaging and handling requirements for manufacturing processes.

Functional Equivalents with Parameter Variations:

APX339TSG-13 (Diodes Incorporated) operates within a narrower supply voltage range (2.5V ~ 5.5V) compared to the MCP6549T-I/ST (1.6V ~ 5.5V). This part is suitable for applications where minimum supply voltage does not fall below 2.5V. The APX339TSG-13 offers superior propagation delay performance (600ns vs. 8µs) and higher output current capability (60mA vs. 30mA), making it advantageous for high-speed switching applications. Active product status and ROHS3 compliance confirm current manufacturing availability.

TS884IPT (STMicroelectronics) provides the lowest minimum supply voltage (1.1V ~ 5.5V) and extended operating temperature range (-40°C ~ 125°C). Output type differs as Push-Pull rather than open-drain configuration. This part is suitable for ultra-low-voltage applications and extended temperature environments. Active product status and ROHS3 compliance confirm current availability.

TLV3404CD (Texas Instruments) is marked as Obsolete and operates within a different temperature range (0°C ~ 70°C), making it unsuitable for applications requiring -40°C minimum operation. The 14-SOIC package differs from the 14-TSSOP footprint, requiring PCB layout modifications. This part is not recommended for new designs.

Compliance Verification: All active substitute parts maintain ROHS3 compliance and REACH unaffected status, confirming environmental regulatory alignment with the MCP6549T-I/ST.

Frequently Asked Questions (FAQ)

Q: Can MCP6549-I/ST replace MCP6549T-I/ST in production? A: Yes. Both parts are electrically identical with the same 14-TSSOP footprint. The difference is packaging format only (Tube vs. Tape & Reel). Selection depends on manufacturing process requirements and handling equipment compatibility.

Q: What is the key difference between APX339TSG-13 and MCP6549T-I/ST? A: The APX339TSG-13 requires a minimum supply voltage of 2.5V, whereas the MCP6549T-I/ST operates from 1.6V. If your circuit operates below 2.5V, the APX339TSG-13 is not suitable. Additionally, APX339TSG-13 features faster propagation delay (600ns vs. 8µs) and higher output current (60mA vs. 30mA).

Q: Is TS884IPT compatible with MCP6549T-I/ST? A: TS884IPT shares the same 14-TSSOP package and four-element comparator configuration. However, it uses Push-Pull output instead of open-drain, operates from 1.1V minimum (lower than MCP6549T-I/ST), and supports extended temperature range to 125°C. Output type compatibility must be verified for your specific circuit design.

Q: Why is TLV3404CD listed as a substitute if it is obsolete? A: TLV3404CD is included for reference purposes only. Its obsolete status means it is no longer in active production. Additionally, the 14-SOIC package differs from the 14-TSSOP footprint, requiring PCB redesign. This part is not recommended for new designs or production use.

Q: What packaging formats are available for these comparators? A: MCP6549T-I/ST is supplied in Tape & Reel (TR) format. MCP6549-I/ST is supplied in Tube format. APX339TSG-13 is supplied in Tape & Reel format. TS884IPT is supplied in Cut Tape (CT) & Digi-Reel format. TLV3404CD packaging format is not specified. All TSSOP variants share identical 0.173" width and 4.40mm footprint dimensions.

Q: Which substitute part has the best performance for high-speed applications? A: APX339TSG-13 offers the fastest propagation delay at 600ns compared to 8µs for MCP6549T-I/ST and 16µs for TS884IPT. However, verify that the 2.5V minimum supply voltage requirement is compatible with your circuit design.

Q: Are all these parts RoHS compliant? A: All active parts (MCP6549T-I/ST, MCP6549-I/ST, APX339TSG-13, and TS884IPT) are ROHS3 compliant. TLV3404CD is also ROHS3 compliant but is obsolete. All parts maintain REACH unaffected status.

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