MAX4377HASA Current Sense Amplifier Equivalent & Substitute Parts

Part Overview

The MAX4377HASA is a dual-channel current sense amplifier manufactured by Analog Devices Inc./Maxim Integrated, designed for precision current measurement applications. This integrated circuit operates across a wide supply voltage range of 3V to 28V and features a 2 MHz bandwidth with 10V/µs slew rate. The device is packaged in an 8-SOIC surface mount configuration.

The MAX4377HASA is classified as obsolete product status. Identifying equivalent and substitute parts is necessary for design continuity, procurement planning, and long-term system reliability when original inventory becomes unavailable or depleted.

Key Parameters

Parameter	Value
Amplifier Type	Current Sense
Number of Circuits	2
Slew Rate	10V/µs
-3dB Bandwidth	2 MHz
Current - Input Bias	120 µA
Current - Supply	1mA (x2 Channels)
Voltage - Supply Span (Min)	3 V
Voltage - Supply Span (Max)	28 V
Operating Temperature Range	-40°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)
Supplier Device Package	8-SOIC

Substitute Part Grouping Explanation

Substitution eligibility for the MAX4377HASA is determined by strict equivalence across the following critical parameters:

Functional Parameters:

Amplifier type classification as current sense amplifier
Dual-channel configuration (2 circuits)
Slew rate of 10V/µs
Bandwidth specification of 2 MHz
Input bias current of 120 µA
Supply current of 1mA per channel

Electrical Parameters:

Supply voltage range: 3V minimum to 28V maximum
Operating temperature range: -40°C to 125°C

Mechanical Parameters:

Surface mount mounting type
8-SOIC package with 0.154" (3.90mm) width

Parts meeting all these specifications are classified as direct substitutes. Packaging format (tube versus alternative packaging) does not affect electrical or mechanical compatibility.

Parameter Comparison

Parameter	MAX4377HASA	MAX4377HASA+
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Amplifier Type	Current Sense	Current Sense
Number of Circuits	2	2
Slew Rate	10V/µs	10V/µs
-3dB Bandwidth	2 MHz	2 MHz
Current - Input Bias	120 µA	120 µA
Current - Supply	1mA (x2 Channels)	1mA (x2 Channels)
Voltage - Supply Span (Min)	3 V	3 V
Voltage - Supply Span (Max)	28 V	28 V
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
Supplier Device Package	8-SOIC	8-SOIC
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Packaging Format	Not specified	Tube

Engineering Selection Recommendations

The MAX4377HASA+ is a direct electrical and mechanical substitute for the MAX4377HASA. Both devices are identical in all functional and electrical parameters, including amplifier type, channel count, slew rate, bandwidth, bias current, supply current, voltage range, temperature range, and package configuration.

The primary distinction between these parts is product lifecycle status and regulatory compliance:

MAX4377HASA (Obsolete): This part is classified as obsolete. While existing inventory of 1022 pieces is available, this status indicates discontinued manufacturing and limited long-term availability.

MAX4377HASA+ (Active): This part maintains active product status with higher current inventory (2396 pieces). The device is ROHS3 compliant, meeting current environmental and regulatory requirements. The MAX4377HASA+ is supplied in tube packaging format.

For new designs or procurement requiring long-term component availability and regulatory compliance, the MAX4377HASA+ is the appropriate selection. For existing systems currently using the MAX4377HASA, the MAX4377HASA+ provides direct substitution without circuit modification or re-qualification.

Frequently Asked Questions (FAQ)

Q: Are MAX4377HASA and MAX4377HASA+ electrically identical?

A: Yes. Both devices share identical electrical specifications including slew rate (10V/µs), bandwidth (2 MHz), input bias current (120 µA), supply current (1mA per channel), and supply voltage range (3V to 28V). Operating temperature range is identical at -40°C to 125°C.

Q: Are these parts mechanically compatible?

A: Yes. Both devices use 8-SOIC surface mount packaging with identical dimensions (0.154" or 3.90mm width). PCB footprints and soldering requirements are identical. No layout modifications are required for substitution.

Q: What is the difference between MAX4377HASA and MAX4377HASA+?

A: The primary differences are product status and regulatory compliance. MAX4377HASA is obsolete with non-compliant RoHS status. MAX4377HASA+ is active product with ROHS3 compliance. Both are supplied by Analog Devices Inc./Maxim Integrated. The MAX4377HASA+ is packaged in tube format.

Q: Can I use MAX4377HASA+ as a replacement in existing designs?

A: Yes. The MAX4377HASA+ is a direct substitute. No circuit changes, firmware updates, or system re-qualification are required. Pin configuration, electrical performance, and mechanical fit are identical.

Q: Why should I transition from MAX4377HASA to MAX4377HASA+?

A: The MAX4377HASA is obsolete with limited inventory. The MAX4377HASA+ ensures long-term component availability, meets current RoHS3 environmental standards, and maintains identical performance characteristics. Transition eliminates future supply chain risk.

Q: Are there any package or lead-free considerations?

A: Both devices are surface mount 8-SOIC packages. The MAX4377HASA+ is ROHS3 compliant, indicating lead-free construction and compliance with current environmental directives. The MAX4377HASA is RoHS non-compliant.

Q: What is the moisture sensitivity level for these parts?

A: Both MAX4377HASA and MAX4377HASA+ have MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage or handling.

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