LP211DRE4 Equivalent & Substitute Parts

Part Overview

The LP211DRE4 is a differential comparator IC manufactured by Texas Instruments in 8-SOIC surface mount packaging. This part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production continuity. The LP211DRE4 features open-collector and open-emitter output configuration, suitable for applications requiring flexible output interfacing in industrial and consumer electronics.

Key Parameters

Parameter	LP211DRE4
Manufacturer	Texas Instruments
Type	Differential Comparator
Number of Elements	1
Output Type	Open-Collector, Open-Emitter
Voltage Supply (Single/Dual)	4.6V ~ 30V, ±1.75V ~ 15V
Input Offset Voltage (Max)	7.5mV @ ±15V
Input Bias Current (Max)	0.1µA @ ±15V
Quiescent Current (Max)	300µA
Operating Temperature	-25°C ~ 85°C
Package	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the LP211DRE4 is determined by the following critical parameters:

Electrical Compatibility Requirements:

Output type: Open-Collector configuration
Supply voltage range: Must support 4.6V ~ 30V single supply or ±1.75V ~ 15V dual supply
Package type: 8-SOIC surface mount form factor
Input offset voltage and bias current specifications
Quiescent current consumption

Substitution Categories:

Category 1 - Direct Parametric Equivalent: LP211DR (Texas Instruments) provides identical electrical specifications and packaging. This part differs only in packaging format (Tape & Reel vs. bulk) and maintains active product status.

Category 2 - Manufacturer Recommended Substitutes: LT1011 series comparators (Analog Devices Inc.) offer enhanced performance characteristics while maintaining functional compatibility. These parts feature improved input offset voltage (0.75mV to 2mV vs. 7.5mV), lower input bias current (0.035µA to 0.065µA vs. 0.1µA), and higher output current capability (50mA typical). All LT1011 variants maintain 8-SOIC packaging and open-collector output configuration. Temperature range variants (LT1011AIS8, LT1011CS8, LT1011IS8) accommodate different operating environments.

Parameter Comparison

Parameter	LP211DRE4	LP211DR	LT1011AIS8#PBF	LT1011AIS8#TRPBF	LT1011CS8#PBF	LT1011CS8#TRPBF	LT1011IS8#PBF
Manufacturer	Texas Instruments	Texas Instruments	Analog Devices	Analog Devices	Analog Devices	Analog Devices	Analog Devices
Product Status	Discontinued	Active	Active	Active	Active	Active	Active
Type	Differential	Differential	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Output Type	Open-Collector, Open-Emitter	Open-Collector, Open-Emitter	Open-Collector	Open-Collector	Open-Collector	Open-Collector	Open-Collector
Voltage Supply (Single/Dual)	4.6V ~ 30V, ±1.75V ~ 15V	4.6V ~ 30V, ±1.75V ~ 15V	3V ~ 36V, ±1.5V ~ 18V	3V ~ 36V, ±1.5V ~ 18V	3V ~ 36V, ±1.5V ~ 18V	3V ~ 36V, ±1.5V ~ 18V	3V ~ 36V, ±1.5V ~ 18V
Input Offset Voltage (Max)	7.5mV @ ±15V	7.5mV @ ±15V	0.75mV @ ±15V	0.75mV @ ±15V	2mV @ ±15V	2mV @ ±15V	2mV @ ±15V
Input Bias Current (Max)	0.1µA @ ±15V	0.1µA @ ±15V	0.035µA @ ±15V	0.035µA @ ±15V	0.065µA @ ±15V	0.065µA @ ±15V	0.065µA @ ±15V
Output Current (Typ)	—	—	50mA	50mA	50mA	50mA	50mA
Quiescent Current (Max)	300µA	300µA	4mA	4mA	4mA	4mA	4mA
CMRR (Typ)	—	—	115dB	115dB	115dB	115dB	115dB
Operating Temperature	-25°C ~ 85°C	-25°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C
Package	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Replacement (Minimum Design Changes): LP211DR is the primary choice for direct substitution. It maintains identical electrical specifications and operating parameters as the LP211DRE4 while offering active product status and higher inventory availability (3350 pcs vs. 697 pcs). The only difference is packaging format (Tape & Reel). Both parts are ROHS3 compliant with MSL rating 1.

For Enhanced Performance Applications: LT1011 series comparators from Analog Devices provide superior electrical characteristics suitable for precision applications. Selection among LT1011 variants depends on operating temperature requirements:

LT1011AIS8#PBF / LT1011AIS8#TRPBF: Extended temperature range (-40°C ~ 85°C) with best-in-class input offset voltage (0.75mV). Suitable for industrial and automotive environments.
LT1011IS8#PBF: Extended temperature range (-40°C ~ 85°C) with moderate input offset voltage (2mV). Balanced performance for general industrial use.
LT1011CS8#PBF / LT1011CS8#TRPBF: Commercial temperature range (0°C ~ 70°C) with input offset voltage of 2mV. Suitable for consumer and commercial applications with controlled thermal environments.

All LT1011 variants feature ROHS3 compliance and MSL rating 1, ensuring compatibility with modern manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can LP211DR be used as a direct drop-in replacement for LP211DRE4? A: Yes. LP211DR provides identical electrical specifications, operating temperature range, and 8-SOIC packaging. The only difference is packaging format (Tape & Reel vs. bulk). No circuit modifications are required.

Q: What are the key differences between LP211DRE4 and LT1011 series comparators? A: LT1011 series offers improved input offset voltage (0.75mV to 2mV vs. 7.5mV), lower input bias current (0.035µA to 0.065µA vs. 0.1µA), and specified output current capability (50mA typical). Supply voltage range is slightly wider (3V ~ 36V vs. 4.6V ~ 30V). All maintain 8-SOIC packaging and open-collector output configuration.

Q: Which LT1011 variant should I select for my application? A: Selection depends on operating temperature requirements. LT1011AIS8 and LT1011IS8 support -40°C ~ 85°C for industrial/automotive use. LT1011CS8 supports 0°C ~ 70°C for commercial/consumer applications. Choose based on your thermal environment and precision requirements (0.75mV offset for LT1011AIS8, 2mV for LT1011CS8 and LT1011IS8).

Q: Are all substitute parts RoHS compliant? A: Yes. LP211DR and all LT1011 variants are ROHS3 compliant with MSL rating 1 (Unlimited), meeting modern environmental and manufacturing standards.

Q: What is the difference between tube and tape & reel packaging? A: Tube packaging is suitable for manual assembly and small-volume production. Tape & Reel packaging is optimized for automated pick-and-place assembly in high-volume manufacturing. Electrical specifications remain identical.

Q: Can I use LT1011 in applications originally designed for LP211DRE4? A: Yes, with circuit verification. LT1011 series offers superior performance characteristics and wider supply voltage range. However, the improved input offset voltage and bias current may affect circuit behavior in precision applications. Verify that the enhanced specifications do not cause unintended circuit operation changes.

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