MAX9181EXT Equivalent & Substitute Parts

Part Overview

The MAX9181EXT is an obsolete voltage level translator manufactured by Analog Devices Inc./Maxim Integrated. This unidirectional translator converts LVPECL input signals to LVDS output signals at 400Mbps, housed in a 6-TSSOP (SC-70-6) package. Due to its obsolete status, equivalent substitute parts are necessary for new designs and production continuity. Suitable alternatives maintain the core functionality of unidirectional voltage translation with comparable electrical performance and surface-mount packaging.

Key Parameters

Parameter	MAX9181EXT
Translator Type	Voltage Level
Channel Type	Unidirectional
Number of Circuits	1
Channels per Circuit	2
Voltage - VCCA	3 V ~ 3.6 V
Input Signal	LVPECL
Output Signal	LVDS
Output Type	Differential
Data Rate	400Mbps
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	6-TSSOP, SC-88, SOT-363
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the MAX9181EXT is determined by the following core parameters:

Translator Type: Voltage Level
Channel Type: Unidirectional
Number of Circuits: 1
Channels per Circuit: 2
Operating Temperature Range: -40°C ~ 85°C (TA)
Mounting Type: Surface Mount
RoHS Compliance: ROHS3 Compliant

The substitute parts listed below maintain these critical parameters. Voltage supply ranges differ among substitutes, with some offering wider input voltage compatibility (0.9 V ~ 4.5 V) compared to the original part's 3 V ~ 3.6 V specification. Package variations exist across substitutes, reflecting different form factors while preserving surface-mount technology. All substitutes are compliant with ROHS3 and operate within the same temperature range as the original part.

Parameter Comparison

Parameter	MAX9181EXT	NLSV2T240MUTAG	NLSV2T244MUTAG	NLVSV2T244DMR2G	SN74AVC2T244DQER
Manufacturer	Analog Devices Inc./Maxim Integrated	onsemi	onsemi	onsemi	Texas Instruments
Translator Type	Voltage Level	Voltage Level	Voltage Level	Voltage Level	Voltage Level
Channel Type	Unidirectional	Unidirectional	Unidirectional	Unidirectional	Unidirectional
Channels per Circuit	2	2	2	2	2
Voltage - VCCA	3 V ~ 3.6 V	0.9 V ~ 4.5 V	0.9 V ~ 4.5 V	0.9 V ~ 4.5 V	0.9 V ~ 3.6 V
Output Type	Differential	Tri-State, Inverted	Tri-State, Non-Inverted	Tri-State, Non-Inverted	Tri-State, Non-Inverted
Data Rate	400Mbps	—	—	—	380Mbps
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	6-TSSOP, SC-88, SOT-363	8-UFDFN	8-UFDFN	8-TSSOP, 8-MSOP	8-XFDFN
Product Status	Obsolete	Obsolete	Obsolete	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Grade	—	—	—	Automotive	—

Engineering Selection Recommendations

SN74AVC2T244DQER is the primary recommended substitute. This Texas Instruments part maintains active product status, ensuring long-term availability and support. It operates within the original voltage range (0.9 V ~ 3.6 V VCCA/VCCB), achieves 380Mbps data rate performance comparable to the original 400Mbps specification, and carries ROHS3 compliance. The 8-XFDFN package provides a compact surface-mount solution suitable for modern PCB designs.

NLVSV2T244DMR2G is suitable for automotive applications requiring AEC-Q100 qualification. This onsemi part offers the same operating temperature range and ROHS3 compliance as the original. The 8-MSOP package is compatible with standard surface-mount assembly processes. Note that this part is also obsolete.

NLSV2T244MUTAG and NLSV2T240MUTAG provide wider voltage supply compatibility (0.9 V ~ 4.5 V) but are obsolete. These onsemi parts feature over-voltage protection and power-off protection. Package selection between these two depends on output polarity requirements: NLSV2T244MUTAG provides non-inverted output, while NLSV2T240MUTAG provides inverted output.

Frequently Asked Questions (FAQ)

Q: Can SN74AVC2T244DQER directly replace MAX9181EXT without circuit modifications?

A: Direct replacement requires PCB layout evaluation. Both parts are unidirectional voltage level translators with 2 channels per circuit and identical operating temperature ranges. However, the package differs (8-XFDFN vs. 6-TSSOP), requiring PCB redesign. Signal polarity and output type differences must be verified against your application requirements.

Q: What is the key difference between NLSV2T244MUTAG and NLSV2T240MUTAG?

A: Both are onsemi unidirectional voltage level translators with identical electrical specifications. The primary difference is output polarity: NLSV2T244MUTAG provides non-inverted output, while NLSV2T240MUTAG provides inverted output. Select based on your signal polarity requirements.

Q: Why does SN74AVC2T244DQER have a lower data rate (380Mbps) than MAX9181EXT (400Mbps)?

A: The 20Mbps difference represents a minor performance variation between device families. For most applications operating below 380Mbps, this difference is not functionally significant. Verify your system's actual data rate requirements before selection.

Q: Is NLVSV2T244DMR2G suitable for non-automotive applications?

A: Yes. NLVSV2T244DMR2G meets all standard requirements for non-automotive use. The automotive qualification (AEC-Q100) and automotive grade designation indicate additional reliability testing but do not restrict use in general-purpose applications.

Q: What packaging considerations apply when substituting these parts?

A: The original MAX9181EXT uses 6-TSSOP packaging. All substitute parts use 8-pin packages (8-UFDFN, 8-MSOP, or 8-XFDFN), requiring PCB layout modifications. Verify pin assignments and signal routing compatibility with your design before implementation.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the original MAX9181EXT specification.

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