MCP6548-I/MS Equivalent & Substitute Parts

Part Overview

The MCP6548-I/MS is a general-purpose CMOS comparator with open-drain, rail-to-rail output and TTL compatibility, packaged in 8-MSOP surface mount configuration. This device operates across a 1.6V to 5.5V supply range and is designed for applications requiring low-power comparison with fast response characteristics. The part is currently in active production status. Substitute parts are identified when packaging constraints, supply availability, or compliance requirements necessitate alternative sourcing while maintaining functional equivalence within specified electrical parameters.

Key Parameters

Parameter	Value
Voltage - Supply, Single/Dual (±)	1.6V ~ 5.5V
Voltage - Input Offset (Max)	7mV @ 5.5V
Current - Input Bias (Max)	1pA @ 5.5V
Current - Output (Typ)	30mA
Current - Quiescent (Max)	1µA
CMRR, PSRR (Typ)	70dB CMRR, 80dB PSRR
Propagation Delay (Max)	8µs
Hysteresis	6.5mV
Operating Temperature	-40°C ~ 85°C
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount
Output Type	CMOS, Open-Drain, Rail-to-Rail, TTL

Substitute Part Grouping Explanation

Substitute parts for the MCP6548-I/MS are classified into three categories based on substitution type and allowed parameter variance:

Direct Manufacturer Substitute (Packaging Variant): MCP6548T-I/MS differs only in packaging format (Tape & Reel vs. Tube) while maintaining identical electrical specifications and the same 8-MSOP footprint. This substitution is valid when supply chain or procurement requirements favor reel packaging.

Parametric Equivalent (Same Manufacturer, Different Model): MCP6546-I/MS shares identical electrical parameters, output type, package footprint, and operating temperature range. The substitution is based on functional equivalence within the MCP654x series, allowing interchangeability when the specific model variant is unavailable.

Cross-Manufacturer Substitutes (Texas Instruments LMV7275 and TLV3401 Series): These parts maintain core functional parameters (open-drain output, general-purpose comparison, CMOS technology) but operate within different supply voltage ranges and package configurations. Substitution validity depends on circuit-level voltage requirements and PCB layout constraints.

Key parameters determining substitution eligibility:

Output Type: CMOS, Open-Drain configuration
Supply Voltage Overlap: Minimum 1.6V ~ 5.5V compatibility
Propagation Delay: Maximum 8µs (MCP6548-I/MS baseline)
Operating Temperature: -40°C ~ 85°C minimum range
Package Footprint: Surface mount, pin-compatible or functionally equivalent

Parameter Comparison

Part Number	Manufacturer	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Output Type	Propagation Delay (Max)	Package	RoHS Status
MCP6548-I/MS	Microchip Technology	1.6V ~ 5.5V	7mV @ 5.5V	1pA @ 5.5V	CMOS, Open-Drain, Rail-to-Rail, TTL	8µs	8-MSOP	RoHS non-compliant
MCP6548T-I/MS	Microchip Technology	1.6V ~ 5.5V	7mV @ 5.5V	1pA @ 5.5V	CMOS, Open-Drain, Rail-to-Rail, TTL	8µs	8-MSOP	ROHS3 Compliant
MCP6546-I/MS	Microchip Technology	1.6V ~ 5.5V	7mV @ 5.5V	1pA @ 5.5V	CMOS, Open-Drain, Rail-to-Rail, TTL	8µs	8-MSOP	RoHS non-compliant
LMV7275IDCKRQ1	Texas Instruments	1.8V ~ 5.5V	4mV @ 5V	0.01µA @ 5V	Open-Drain	2.1µs	SC-70-5	ROHS3 Compliant
LMV7275MG/NOPB	Texas Instruments	1.8V ~ 5.5V	4mV @ 5V	0.01µA @ 5V	CMOS, Open-Drain, Rail-to-Rail	2.1µs	SC-70-5	ROHS3 Compliant
LMV7275MGX/NOPB	Texas Instruments	1.8V ~ 5.5V	4mV @ 5V	0.01µA @ 5V	CMOS, Open-Drain, Rail-to-Rail	2.1µs	SC-70-5	ROHS3 Compliant
TLV3401CD	Texas Instruments	2.5V ~ 16V	3.6mV @ 15V	250pA @ 15V	CMOS, Open-Drain	300µs	8-SOIC	ROHS3 Compliant
TLV3401CDBVT	Texas Instruments	2.5V ~ 16V	3.6mV @ 15V	250pA @ 15V	CMOS, Open-Drain	300µs	SOT-23-5	ROHS3 Compliant
TLV3401IP	Texas Instruments	2.7V ~ 16V	3.6mV @ 15V	250pA @ 15V	CMOS, Open-Drain	300µs	8-DIP	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Substitution (Same Electrical Performance): MCP6548T-I/MS is the preferred substitute when RoHS3 compliance is required. This part maintains identical electrical specifications and 8-MSOP footprint compatibility while offering improved environmental compliance status. MCP6546-I/MS provides parametric equivalence within the Microchip MCP654x family and is suitable when the specific MCP6548 variant is unavailable.

For Cross-Manufacturer Substitution: LMV7275 series parts (LMV7275MG/NOPB, LMV7275MGX/NOPB, LMV7275IDCKRQ1) are suitable when supply constraints or design requirements favor Texas Instruments components. These parts offer improved propagation delay (2.1µs vs. 8µs) and lower input bias current (0.01µA vs. 1pA), with RoHS3 compliance. However, package footprint differs (SC-70-5 vs. 8-MSOP), requiring PCB layout modification.

TLV3401 series parts (TLV3401CD, TLV3401CDBVT, TLV3401IP) operate at higher supply voltages (2.5V minimum vs. 1.6V) and exhibit significantly longer propagation delay (300µs vs. 8µs). These parts are suitable only for applications where the extended delay and higher voltage requirements are acceptable. All TLV3401 variants carry Last Time Buy status, limiting long-term availability.

Compliance Considerations: MCP6548-I/MS and MCP6546-I/MS are RoHS non-compliant. For applications requiring RoHS3 compliance, MCP6548T-I/MS or Texas Instruments alternatives (LMV7275 or TLV3401 series) must be selected. All substitute parts listed maintain REACH Unaffected and EAR99 export classification status.

Frequently Asked Questions (FAQ)

Q: Can MCP6548T-I/MS replace MCP6548-I/MS directly on the PCB? A: Yes. MCP6548T-I/MS is electrically and mechanically identical to MCP6548-I/MS. The only difference is packaging format (Tape & Reel vs. Tube). Both use the same 8-MSOP footprint and require no circuit modifications.

Q: What is the key difference between MCP6548-I/MS and MCP6546-I/MS? A: Both parts share identical electrical specifications, output type, package, and operating temperature range. The difference lies in the model designation within the MCP654x series. MCP6546-I/MS is a parametric equivalent suitable for substitution when MCP6548-I/MS is unavailable.

Q: Can LMV7275 series parts replace MCP6548-I/MS in existing designs? A: LMV7275 parts are functionally equivalent but require design evaluation. Key differences include: different package footprint (SC-70-5 vs. 8-MSOP), lower minimum supply voltage (1.8V vs. 1.6V), faster propagation delay (2.1µs vs. 8µs), and lower input bias current (0.01µA vs. 1pA). PCB layout modification is required.

Q: Why do TLV3401 parts have much longer propagation delays? A: TLV3401 series comparators are designed for higher voltage operation (2.5V ~ 16V range) and different application requirements. The 300µs propagation delay reflects different internal architecture optimized for extended supply voltage range rather than speed-critical applications.

Q: Are all substitute parts RoHS3 compliant? A: No. MCP6548-I/MS and MCP6546-I/MS are RoHS non-compliant. MCP6548T-I/MS and all Texas Instruments alternatives (LMV7275 series and TLV3401 series) are ROHS3 Compliant.

Q: What is the minimum supply voltage for each substitute? A: MCP6548-I/MS, MCP6548T-I/MS, and MCP6546-I/MS: 1.6V. LMV7275 series: 1.8V. TLV3401CD and TLV3401CDBVT: 2.5V. TLV3401IP: 2.7V. Verify circuit design operates within the selected part's minimum voltage specification.

Q: Can I use TLV3401IP in a surface mount design? A: No. TLV3401IP is packaged in 8-DIP (through-hole) format. For surface mount applications, use TLV3401CD (8-SOIC) or TLV3401CDBVT (SOT-23-5).

Q: What is the inventory status of these parts? A: MCP6548-I/MS: 1090 pcs. MCP6548T-I/MS: 3359 pcs. MCP6546-I/MS: 956 pcs. LMV7275IDCKRQ1: 3935 pcs. LMV7275MG/NOPB: 18496 pcs. LMV7275MGX/NOPB: 26229 pcs. TLV3401CD: 836 pcs. TLV3401CDBVT: 2144 pcs. TLV3401IP: 866 pcs.

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