LM111JG Equivalent & Substitute Parts

Part Overview

The LM111JG is a differential comparator manufactured by Texas Instruments, designed for general-purpose voltage comparison applications. This device features open-collector and open-emitter outputs, enabling flexible interfacing with various logic families and signal levels. The LM111JG operates across a wide supply voltage range of 3.5V to 30V (single supply) or ±1.75V to ±15V (dual supply), with an operating temperature range of -55°C to 125°C. The component is currently in active production status with ROHS3 compliance certification. Identifying equivalent substitute parts is necessary when primary inventory is unavailable or when alternative packaging or supplier options are required for procurement optimization.

Substiute Parts

LM111JG

Texas InstrumentsIn Stock: 1685LM111JG Datasheet

Current PartRFQ

LM111J-8

Texas InstrumentsIn Stock: 1797LM111J-8 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM111JG is determined by strict alignment of the following critical parameters:

Package Compatibility: Both the main part and substitute must use the 8-CDIP (0.300", 7.62mm) through-hole package to ensure mechanical and electrical compatibility with existing PCB designs.

Output Configuration: The open-collector and open-emitter output topology must be maintained to preserve circuit functionality and interface characteristics.

Supply Voltage Range: The substitute must support the required supply voltage range of 3.5V to 30V (single supply) or ±1.75V to ±15V (dual supply).

Input Offset Voltage: Maximum input offset voltage specification of 3mV @ ±15V must be met or exceeded.

Input Bias Current: Maximum input bias current of 0.1µA @ ±15V must be maintained.

Operating Temperature Range: The substitute must support the full operating temperature range of -55°C to 125°C.

Regulatory Compliance: ROHS3 compliance is required for environmental and regulatory adherence.

The LM111J-8 meets all these criteria and qualifies as a direct substitute for the LM111JG.

Parameter Comparison

Engineering Selection Recommendations

The LM111J-8 is a qualified substitute for the LM111JG based on the following engineering criteria:

Regulatory Compliance: Both parts maintain ROHS3 compliance, ensuring adherence to environmental and hazardous substance restrictions.

Product Status: Both components are in active production status, guaranteeing continued availability and manufacturer support.

Electrical Specifications: The LM111J-8 meets or exceeds all critical electrical parameters of the LM111JG, including input offset voltage, input bias current, and operating temperature range.

Package Compatibility: Identical 8-CDIP through-hole packaging ensures direct PCB compatibility without layout modifications.

Supply Voltage Capability: The LM111J-8 supports an extended supply voltage range (5V ~ 36V single supply, ±2.5V ~ 18V dual supply) that encompasses the LM111JG requirements, providing additional operational flexibility.

Output Configuration: The LM111J-8 output type encompasses the open-collector and open-emitter configuration of the LM111JG, maintaining circuit interface integrity.

Selection of the LM111J-8 as a substitute does not require design modifications or additional validation beyond standard component procurement verification.

Frequently Asked Questions (FAQ)

Q: Can the LM111J-8 be used as a direct replacement for the LM111JG without PCB modifications?

A: Yes. Both components use identical 8-CDIP through-hole packaging with matching pin configurations. No PCB layout changes are required for substitution.

Q: Are there differences in the output type specifications between these parts?

A: The LM111JG specifies open-collector and open-emitter outputs. The LM111J-8 output type includes DTL, MOS, open-collector, open-emitter, RTL, and TTL compatibility. The LM111J-8 output configuration is a superset that includes the LM111JG output type, ensuring functional compatibility.

Q: What is the difference in supply voltage range between the LM111JG and LM111J-8?

A: The LM111JG operates at 3.5V ~ 30V (single supply) or ±1.75V ~ 15V (dual supply). The LM111J-8 operates at 5V ~ 36V (single supply) or ±2.5V ~ 18V (dual supply). The LM111J-8 supports a wider voltage range, making it compatible with all LM111JG applications and additional higher-voltage applications.

Q: Do both parts have identical input offset voltage specifications?

A: Yes. Both the LM111JG and LM111J-8 specify a maximum input offset voltage of 3mV @ ±15V, ensuring equivalent precision in voltage comparison applications.

Q: Are the input bias current specifications the same?

A: Yes. Both parts specify a maximum input bias current of 0.1µA @ ±15V, providing identical input impedance characteristics.

Q: What is the operating temperature range for both parts?

A: Both the LM111JG and LM111J-8 operate across the full temperature range of -55°C to 125°C, supporting industrial and extended-temperature applications.

Q: Are both parts RoHS compliant?

A: Yes. Both the LM111JG and LM111J-8 are ROHS3 compliant, meeting environmental and regulatory requirements for hazardous substance restrictions.

Q: Is the LM111J-8 available in the same packaging as the LM111JG?

A: Yes. Both parts are supplied in 8-CDIP (0.300", 7.62mm) through-hole packages. The LM111J-8 is available in tube packaging, while the LM111JG packaging specification is not detailed in the provided data.

Q: Can the LM111J-8 be used in applications requiring the full -55°C to 125°C temperature range?

A: Yes. The LM111J-8 supports the complete operating temperature range of -55°C to 125°C, identical to the LM111JG specification.

Q: Are there any quiescent current differences between the two parts?

A: The LM111JG specifies quiescent current of 5mA or 6mA. The LM111J-8 specifies 6mA maximum quiescent current. The LM111J-8 specification is within the range of the LM111JG, ensuring compatible power consumption characteristics.