LM6511IMX Equivalent & Substitute Parts

Part Overview

The LM6511IMX is a general-purpose comparator IC manufactured by Texas Instruments, featuring CMOS, open-collector, and TTL output types in an 8-SOIC surface-mount package. The device operates across a wide supply voltage range of 2.5V to 30V and is designed for single-element comparison applications. However, the LM6511IMX is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Active alternatives with compatible electrical and mechanical specifications are available from multiple manufacturers.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Linear
Type	General Purpose Comparator
Number of Elements	1
Output Type	CMOS, Open-Collector, TTL
Voltage - Supply, Single/Dual (±)	2.5V ~ 30V
Voltage - Input Offset (Max)	5mV @ 2.7V
Current - Input Bias (Max)	0.13µA @ 2.7V
Current - Quiescent (Max)	4.6mA
CMRR, PSRR (Typ)	72dB CMRR
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the LM6511IMX is determined by the following critical parameters:

Output Type Compatibility: CMOS, open-collector, and TTL output configurations
Supply Voltage Range: Minimum 2.5V to 30V operation
Input Offset Voltage: Maximum 5mV specification
Input Bias Current: Maximum 0.13µA specification
Quiescent Current: Maximum 4.6mA specification
Common-Mode Rejection Ratio: 72dB CMRR minimum
Operating Temperature Range: -40°C to 85°C minimum
Package Type: 8-SOIC surface-mount configuration
Single-Element Configuration: One comparator per IC

Substitute parts are grouped based on electrical parameter compatibility within these specifications. Parts meeting all critical parameters are classified as direct equivalents. Parts with parameter variations are classified as functional alternatives with noted differences.

Parameter Comparison

Parameter	LM6511IMX	LM6511IMX/NOPB	TA75S393F,LF	TS391RILT	LMV331W5-7
Manufacturer	Texas Instruments	Texas Instruments	Toshiba Semiconductor	STMicroelectronics	Diodes Incorporated
Product Status	Obsolete	Active	Active	Active	Active
Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Elements	1	1	1	1	1
Output Type	CMOS, Open-Collector, TTL	CMOS, Open-Collector, TTL	CMOS, DTL, MOS, Open-Collector, TTL	CMOS, DTL, ECL, MOS, TTL	Open-Collector
Voltage - Supply, Single/Dual (±)	2.5V ~ 30V	2.5V ~ 30V	2V ~ 36V, ±1V ~ 18V	2V ~ 36V, ±1V ~ 18V	2.7V ~ 5.5V
Voltage - Input Offset (Max)	5mV @ 2.7V	5mV @ 2.7V	5mV @ 5V	5mV @ 30V	7mV @ 5V
Current - Input Bias (Max)	0.13µA @ 2.7V	0.13µA @ 2.7V	0.05µA @ 5V	0.25µA @ 5V	0.25µA @ 5V
Current - Quiescent (Max)	4.6mA	4.6mA	800µA	1.25mA	200µA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	8-SOIC	8-SOIC	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)

Engineering Selection Recommendations

LM6511IMX/NOPB (Texas Instruments): This is the direct equivalent of the LM6511IMX with identical electrical specifications and 8-SOIC packaging. The primary distinction is product status—LM6511IMX/NOPB is active and ROHS3 compliant, whereas the original LM6511IMX is obsolete and RoHS non-compliant. This part is the preferred replacement for existing LM6511IMX designs requiring continued supply and regulatory compliance.

TA75S393F,LF (Toshiba Semiconductor): This part meets all critical electrical parameters with extended supply voltage range (2V ~ 36V, ±1V ~ 18V) and lower input bias current (0.05µA @ 5V). It features reduced quiescent current (800µA) compared to the LM6511IMX. The package is SC-74A/SOT-753 surface-mount, requiring PCB layout modification. ROHS3 compliant with MSL 1 rating.

TS391RILT (STMicroelectronics): This part meets all critical electrical parameters with extended supply voltage range (2V ~ 36V, ±1V ~ 18V) and extended operating temperature range (-40°C ~ 125°C). Input bias current is 0.25µA @ 5V with quiescent current of 1.25mA. The package is SC-74A/SOT-753 surface-mount, requiring PCB layout modification. ROHS3 compliant with MSL 1 rating.

LMV331W5-7 (Diodes Incorporated): This part has restricted supply voltage range (2.7V ~ 5.5V), limiting applicability to designs operating within this narrower range. Input offset voltage is 7mV @ 5V, exceeding the 5mV specification of the LM6511IMX. The package is SC-74A/SOT-753 surface-mount, requiring PCB layout modification. ROHS3 compliant with MSL 3 rating requiring controlled storage conditions.

Frequently Asked Questions (FAQ)

Q: Can LM6511IMX/NOPB be used as a direct replacement for LM6511IMX?

A: Yes. LM6511IMX/NOPB is electrically and mechanically identical to LM6511IMX with identical 8-SOIC packaging, supply voltage range (2.5V ~ 30V), input offset voltage (5mV @ 2.7V), and all other critical parameters. The primary difference is product status—LM6511IMX/NOPB is active and ROHS3 compliant.

Q: What are the package differences between substitute parts?

A: LM6511IMX and LM6511IMX/NOPB use 8-SOIC (0.154", 3.90mm Width) packaging. TA75S393F,LF, TS391RILT, and LMV331W5-7 use SC-74A/SOT-753 packaging. These are different footprints requiring PCB redesign if substituting with alternative packages.

Q: Which substitute part has the lowest quiescent current?

A: LMV331W5-7 has the lowest quiescent current at 200µA maximum. However, this part is restricted to 2.7V ~ 5.5V supply voltage range and has higher input offset voltage (7mV @ 5V) compared to the LM6511IMX specification (5mV @ 2.7V).

Q: Are all substitute parts RoHS compliant?

A: LM6511IMX/NOPB, TA75S393F,LF, TS391RILT, and LMV331W5-7 are all ROHS3 compliant. The original LM6511IMX is RoHS non-compliant.

Q: What is the moisture sensitivity level difference between substitute parts?

A: LM6511IMX, LM6511IMX/NOPB, TA75S393F,LF, and TS391RILT have MSL 1 (Unlimited) rating. LMV331W5-7 has MSL 3 (168 Hours) rating, requiring controlled storage and handling procedures.

Q: Can LMV331W5-7 be used in designs requiring 30V supply voltage?

A: No. LMV331W5-7 is limited to 2.7V ~ 5.5V supply voltage range, making it unsuitable for designs requiring the full 2.5V ~ 30V range of the LM6511IMX.

Q: Which substitute parts support the full operating temperature range of -40°C to 85°C?

A: LM6511IMX, LM6511IMX/NOPB, and TA75S393F,LF support -40°C to 85°C. TS391RILT and LMV331W5-7 extend to -40°C to 125°C.

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