FIN1531M Equivalent & Substitute Parts

Part Overview

The FIN1531M is a 4/0 Driver LVDS interface IC manufactured by onsemi in a 16-SOIC surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The FIN1531M operates at 400 Mbps data rate with a 4.5V to 5.5V supply voltage range and supports industrial temperature specifications from -40°C to 85°C.

Substiute Parts

FIN1531M

onsemiIn Stock: 1365FIN1531M Datasheet

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AM26LS31CD

Texas InstrumentsIn Stock: 4949AM26LS31CD Datasheet

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AM26LS31CDR

Texas InstrumentsIn Stock: 38219AM26LS31CDR Datasheet

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AM26LS31CDRG4

Texas InstrumentsIn Stock: 6477AM26LS31CDRG4 Datasheet

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DS90C031BTM/NOPB

Texas InstrumentsIn Stock: 1532DS90C031BTM/NOPB Datasheet

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DS90C031TM/NOPB

Texas InstrumentsIn Stock: 3254DS90C031TM/NOPB Datasheet

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SN65LVDM31DG4

Texas InstrumentsIn Stock: 737SN65LVDM31DG4 Datasheet

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TB5D1MD

Texas InstrumentsIn Stock: 1546TB5D1MD Datasheet

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TB5D2HD

Texas InstrumentsIn Stock: 1101TB5D2HD Datasheet

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TB5D2HDR

Texas InstrumentsIn Stock: 1439TB5D2HDR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the FIN1531M is determined by the following critical parameters:

Primary Substitution Criteria:

• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Number of Drivers/Receivers: 4/0
• Mounting Type: Surface Mount
• Protocol: LVDS (for direct functional equivalence)
• Voltage - Supply: 4.5V ~ 5.5V (compatible range)
• Operating Temperature: -40°C ~ 85°C (industrial grade)

Substitute parts are grouped into two categories:

Category 1: Direct LVDS Protocol Equivalents Parts maintaining LVDS protocol with matching electrical and thermal specifications:

• DS90C031BTM/NOPB (Texas Instruments)
• DS90C031TM/NOPB (Texas Instruments)

Category 2: Compatible Interface Drivers with Flexible Protocol Support Parts with 4/0 driver configuration, matching package, and compatible voltage/temperature ranges but with different or unspecified protocols:

• AM26LS31CD (Texas Instruments)
• AM26LS31CDR (Texas Instruments)
• AM26LS31CDRG4 (Texas Instruments)
• TB5D1MD (Texas Instruments)
• TB5D2HD (Texas Instruments)
• TB5D2HDR (Texas Instruments)
• SN65LVDM31DG4 (Texas Instruments)

Parameter Comparison

Engineering Selection Recommendations

For Direct LVDS Protocol Replacement:

DS90C031BTM/NOPB and DS90C031TM/NOPB are the primary substitutes for FIN1531M. Both parts maintain LVDS protocol compatibility, identical voltage supply range (4.5V ~ 5.5V), matching operating temperature range (-40°C ~ 85°C), and 16-SOIC package. Both are manufactured by Texas Instruments and carry Active product status with ROHS3 compliance. DS90C031TM/NOPB offers higher inventory availability (3236 units) compared to DS90C031BTM/NOPB (1511 units).

For Extended Supply Chain Options:

TB5D1MD, TB5D2HD, and TB5D2HDR provide compatible 4/0 driver configurations in 16-SOIC packages with extended voltage range (3V ~ 5.5V) and matching industrial temperature specifications. All three maintain Active product status and ROHS3 compliance. TB5D2HDR is available in Tape & Reel packaging, while TB5D2HD and TB5D1MD are supplied in Tube packaging. These parts support broader voltage applications but require protocol verification for specific system requirements.

For Legacy System Compatibility:

AM26LS31CDR is the only substitute with Active product status among the RS422/RS485 protocol group. It maintains 4/0 driver configuration and 16-SOIC package but operates within a narrower voltage range (4.75V ~ 5.25V) and reduced temperature range (0°C ~ 70°C). This part is suitable only for applications where RS422/RS485 protocol compatibility is acceptable and operating conditions remain within specified limits.

Parts to Avoid:

SN65LVDM31DG4 is discontinued at DiGi Electronics and operates at reduced voltage range (3V ~ 3.6V), making it unsuitable for direct replacement. AM26LS31CD and AM26LS31CDRG4 carry Last Time Buy status, indicating limited future availability.

Frequently Asked Questions (FAQ)

Q: Can DS90C031BTM/NOPB directly replace FIN1531M without circuit modifications?

A: DS90C031BTM/NOPB maintains identical LVDS protocol, 4/0 driver configuration, 16-SOIC package, and matching voltage/temperature specifications. Direct pin-for-pin replacement is supported. Verify pinout alignment in device datasheets before PCB layout changes.

Q: What is the primary difference between DS90C031BTM/NOPB and DS90C031TM/NOPB?

A: Both parts are functionally equivalent with identical electrical specifications. The difference lies in packaging format: DS90C031BTM/NOPB is supplied in Tube packaging, while DS90C031TM/NOPB is also supplied in Tube. Inventory availability differs, with DS90C031TM/NOPB offering higher stock levels.

Q: Are TB5D2HDR and TB5D2HD interchangeable?

A: TB5D2HDR and TB5D2HD are functionally equivalent with identical electrical specifications and 16-SOIC package. The primary difference is packaging: TB5D2HDR is supplied in Tape & Reel format, while TB5D2HD is supplied in Tube format. Selection depends on production assembly requirements and packaging preferences.

Q: Why do AM26LS31 series parts have different voltage and temperature ranges than FIN1531M?

A: AM26LS31 series parts implement RS422/RS485 protocols rather than LVDS, resulting in different electrical specifications. AM26LS31CD, AM26LS31CDR, and AM26LS31CDRG4 operate at 4.75V ~ 5.25V (narrower than FIN1531M) and 0°C ~ 70°C (reduced temperature range). These parts are suitable only for applications where protocol compatibility is verified and operating conditions remain within specified limits.

Q: Is TB5D1MD suitable for industrial temperature applications?

A: TB5D1MD supports the full industrial temperature range (-40°C ~ 85°C) matching FIN1531M specifications. However, protocol information is not specified in available data. Functional compatibility must be verified through detailed datasheet review and application requirements analysis before deployment.

Q: What does "Last Time Buy" product status mean for AM26LS31CD and AM26LS31CDRG4?

A: Last Time Buy status indicates that these parts are no longer in active production and available inventory represents the final manufacturing run. Once current stock is depleted, these parts will not be restocked. For long-term production requirements, Active status parts such as AM26LS31CDR are recommended.

Q: Can FIN1531M be replaced with SN65LVDM31DG4?

A: SN65LVDM31DG4 is not recommended as a replacement. This part is discontinued at DiGi Electronics and operates at reduced voltage range (3V ~ 3.6V), which is incompatible with FIN1531M's 4.5V ~ 5.5V specification. Limited availability and voltage incompatibility make this part unsuitable for new designs or production continuity.