MAX983ESA-T Equivalent & Substitute Parts

Part Overview

The MAX983ESA-T is a dual comparator with integrated voltage reference manufactured by Analog Devices Inc./Maxim Integrated. This 8-SOIC surface mount device operates across supply voltages of 2.5V to 11V (single supply) or ±1.25V to ±5.5V (dual supply), with a maximum input offset voltage of 10mV at 5V and 50mV hysteresis. The part is classified as obsolete, making equivalent substitutes necessary for new designs and production continuity. Substitute parts must maintain electrical compatibility across supply voltage ranges, input offset specifications, hysteresis characteristics, and thermal operating ranges while accommodating packaging and output type variations.

Key Parameters

Parameter	Value
Manufacturer	Analog Devices Inc./Maxim Integrated
Category	Linear - Comparator with Voltage Reference
Number of Elements	2
Voltage Supply (Single/Dual)	2.5V ~ 11V, ±1.25V ~ 5.5V
Input Offset Voltage (Max)	10mV @ 5V
Quiescent Current (Max)	6µA
CMRR / PSRR (Typical)	80dB CMRR, 80dB PSRR
Hysteresis	50mV
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the MAX983ESA-T is determined by strict alignment across the following critical parameters:

Electrical Compatibility Requirements:

Supply voltage range: 2.5V ~ 11V (single) and ±1.25V ~ ±5.5V (dual)
Input offset voltage: 10mV maximum at 5V
Hysteresis: 50mV
CMRR and PSRR: 80dB minimum
Number of comparator elements: 2
Operating temperature range: -40°C ~ 85°C (preferred) or 0°C ~ 70°C (limited)

Mechanical & Packaging Compatibility:

Package type: 8-SOIC (0.154", 3.90mm Width)
Mounting type: Surface Mount
Compliance: ROHS3 Compliant, REACH Unaffected

Output Type Consideration: The MAX983ESA-T features standard output configuration. Substitute parts with open-drain output (LTC1842 and LTC1843 series) are electrically compatible but require external pull-up resistors in applications where the original part's output stage characteristics are critical.

Product Status Impact: Direct substitutes include both active parts (MAX983ESA+T in tape & reel packaging) and manufacturer-recommended alternatives from the LTC1842 and LTC1843 series, all currently in active production status.

Parameter Comparison

Part Number	Manufacturer	Product Status	Packaging	Output Type	Supply Voltage	Input Offset (Max)	Quiescent Current (Max)	Hysteresis	Operating Temp	Inventory
MAX983ESA-T	Analog Devices/Maxim	Obsolete	Tube	Standard	2.5V~11V, ±1.25V~5.5V	10mV @ 5V	6µA	50mV	-40°C ~ 85°C	1111 Pcs
MAX983ESA+T	Analog Devices/Maxim	Active	Tape & Reel	Standard	2.5V~11V, ±1.25V~5.5V	10mV @ 5V	6µA	50mV	-40°C ~ 85°C	2416 Pcs
LTC1843IS8#PBF	Analog Devices	Active	Tube	Open-Drain	2.5V~11V, ±1.25V~5.5V	10mV @ 5V	5.7µA	50mV	-40°C ~ 85°C	2700 Pcs
LTC1843IS8#TRPBF	Analog Devices	Active	Tape & Reel	Open-Drain	2.5V~11V, ±1.25V~5.5V	10mV @ 5V	5.7µA	50mV	-40°C ~ 85°C	6023 Pcs
LTC1842CS8#PBF	Analog Devices	Active	Tube	Open-Drain	2.5V~11V, ±1.25V~5.5V	10mV @ 5V	5.7µA	50mV	0°C ~ 70°C	1239 Pcs
LTC1842CS8#TRPBF	Analog Devices	Active	Tape & Reel	Open-Drain	2.5V~11V, ±1.25V~5.5V	10mV @ 5V	5.7µA	50mV	0°C ~ 70°C	2352 Pcs
LTC1842IS8#PBF	Analog Devices	Active	Tube	Open-Drain	2.5V~11V, ±1.25V~5.5V	10mV @ 5V	5.7µA	50mV	-40°C ~ 85°C	2994 Pcs
LTC1842IS8#TRPBF	Analog Devices	Active	Tape & Reel	Open-Drain	2.5V~11V, ±1.25V~5.5V	10mV @ 5V	5.7µA	50mV	-40°C ~ 85°C	8502 Pcs
LTC1843CS8#PBF	Analog Devices	Active	Tube	Open-Drain	2.5V~11V, ±1.25V~5.5V	10mV @ 5V	5.7µA	50mV	0°C ~ 70°C	2006 Pcs
LTC1843CS8#TRPBF	Analog Devices	Active	Tape & Reel	Open-Drain	2.5V~11V, ±1.25V~5.5V	10mV @ 5V	5.7µA	50mV	0°C ~ 70°C	3838 Pcs

Engineering Selection Recommendations

Primary Substitute (Identical Specification): MAX983ESA+T is the direct active-production equivalent, maintaining identical electrical specifications and standard output configuration. This part is available in tape & reel packaging and carries active product status with ROHS3 compliance and unlimited moisture sensitivity rating.

Secondary Substitutes (Extended Temperature Range): LTC1842IS8#PBF and LTC1842IS8#TRPBF maintain the full -40°C to 85°C operating temperature range of the original part. Both feature open-drain output architecture and are available in tube and tape & reel packaging options. These parts are manufacturer-recommended alternatives with active status and ROHS3 compliance.

Alternative Substitutes (Commercial Temperature Range): LTC1842CS8#PBF, LTC1842CS8#TRPBF, LTC1843CS8#PBF, and LTC1843CS8#TRPBF operate within the 0°C to 70°C commercial temperature range. Selection of these parts is appropriate only for applications where the reduced thermal operating window is acceptable. All maintain open-drain output configuration and ROHS3 compliance.

Output Type Consideration: All LTC1842 and LTC1843 series substitutes feature open-drain output compared to the MAX983ESA-T standard output. Circuit designs utilizing these alternatives must incorporate external pull-up resistors to the appropriate supply voltage rail to achieve equivalent output voltage swing and impedance characteristics.

Frequently Asked Questions (FAQ)

Q: Can LTC1842 and LTC1843 series parts directly replace MAX983ESA-T without circuit modification?

A: Electrical substitution is valid across all specified parameters. However, the open-drain output architecture of LTC1842 and LTC1843 parts requires external pull-up resistors, whereas the MAX983ESA-T features standard output. Circuit board layout modifications are necessary to accommodate pull-up resistor placement and routing.

Q: What is the difference between LTC1842 and LTC1843 part numbers?

A: Both series maintain identical electrical specifications, supply voltage ranges, input offset voltage, hysteresis, and CMRR/PSRR characteristics. The primary distinction is product grading: LTC1842 parts are graded for 0°C to 70°C operation, while LTC1843 parts are graded for -40°C to 85°C operation. Selection depends on application thermal requirements.

Q: Are tube and tape & reel packaging options electrically equivalent?

A: Yes. Packaging format (tube versus tape & reel) does not affect electrical performance or functional characteristics. Selection is based on manufacturing process requirements and inventory management practices. Tape & reel packaging is standard for automated assembly operations.

Q: Does the MAX983ESA+T (active status) differ electrically from the MAX983ESA-T (obsolete status)?

A: No electrical differences exist. The MAX983ESA+T is the active production continuation of the MAX983ESA-T, maintaining identical specifications. The designation change reflects packaging format (tape & reel versus tube) and current manufacturing status.

Q: What is the significance of the "#PBF" and "#TRPBF" suffixes in LTC part numbers?

A: The "#PBF" suffix indicates tube packaging with lead-free solder finish. The "#TRPBF" suffix indicates tape & reel packaging with lead-free solder finish. Both designations confirm ROHS3 compliance and lead-free manufacturing processes.

Q: Can I use LTC1843CS8#PBF in an application requiring -40°C to 85°C operation?

A: No. The LTC1843CS8#PBF is rated for 0°C to 70°C operation only. For extended temperature range applications, use LTC1843IS8#PBF or LTC1843IS8#TRPBF, which are specified for -40°C to 85°C operation.

Q: What inventory levels are available for each substitute part?

A: Current inventory includes MAX983ESA+T (2416 pcs), LTC1843IS8#PBF (2700 pcs), LTC1843IS8#TRPBF (6023 pcs), LTC1842CS8#PBF (1239 pcs), LTC1842CS8#TRPBF (2352 pcs), LTC1842IS8#PBF (2994 pcs), LTC1842IS8#TRPBF (8502 pcs), LTC1843CS8#PBF (2006 pcs), and LTC1843CS8#TRPBF (3838 pcs).

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