THS4131CDR Equivalent & Substitute Parts

Part Overview

The THS4131CDR is a differential amplifier integrated circuit manufactured by Texas Instruments, designed for high-speed signal conditioning applications. This device features a single differential amplifier circuit in an 8-SOIC surface mount package with a gain bandwidth product of 225 MHz and slew rate of 52 V/µs.

The THS4131CDR is designated as Last Time Buy, indicating that Texas Instruments has discontinued this product line. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications currently utilizing this component.

Key Parameters

Parameter	Value	Unit
Amplifier Type	Differential	—
Number of Circuits	1	—
Output Type	Differential	—
Slew Rate	52	V/µs
Gain Bandwidth Product	225	MHz
-3dB Bandwidth	150	MHz
Current - Input Bias	2	µA
Voltage - Input Offset	200	µV
Current - Supply	12.3	mA
Current - Output / Channel	85	mA
Voltage - Supply Span (Min)	4	V
Voltage - Supply Span (Max)	33	V
Operating Temperature	0 to 70	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the THS4131CDR is determined by strict equivalence across the following critical parameters:

Electrical Performance Criteria:

Amplifier type (Differential)
Number of circuits (1)
Output type (Differential)
Slew rate (52 V/µs)
Gain bandwidth product (225 MHz)
-3dB bandwidth (150 MHz)
Input bias current (2 µA)
Input offset voltage (200 µV)
Supply current (12.3 mA)
Output current per channel (85 mA)
Supply voltage range (4 V to 33 V)

Mechanical & Environmental Criteria:

Package type (8-SOIC)
Mounting type (Surface Mount)
Moisture sensitivity level (MSL 1)
RoHS compliance (ROHS3)

The THS4131IDR is identified as a manufacturer-recommended substitute based on identical electrical specifications and package compatibility. The primary distinction is the operating temperature range and product status.

Parameter Comparison

Parameter	THS4131CDR (Main Part)	THS4131IDR (Substitute)	Match Status
Manufacturer	Texas Instruments	Texas Instruments	Identical
Amplifier Type	Differential	Differential	Identical
Number of Circuits	1	1	Identical
Output Type	Differential	Differential	Identical
Slew Rate	52 V/µs	52 V/µs	Identical
Gain Bandwidth Product	225 MHz	225 MHz	Identical
-3dB Bandwidth	150 MHz	150 MHz	Identical
Current - Input Bias	2 µA	2 µA	Identical
Voltage - Input Offset	200 µV	200 µV	Identical
Current - Supply	12.3 mA	12.3 mA	Identical
Current - Output / Channel	85 mA	85 mA	Identical
Voltage - Supply Span (Min)	4 V	4 V	Identical
Voltage - Supply Span (Max)	33 V	33 V	Identical
Operating Temperature	0°C to 70°C	-40°C to 85°C	Extended Range
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Identical
Product Status	Last Time Buy	Active	Different

Engineering Selection Recommendations

The THS4131IDR is a direct electrical and mechanical equivalent to the THS4131CDR. Both devices share identical electrical specifications, package geometry, and compliance certifications (ROHS3, REACH Unaffected, EAR99 classification).

The THS4131IDR offers the advantage of Active product status, ensuring continued availability and manufacturing support from Texas Instruments. The extended operating temperature range (-40°C to 85°C versus 0°C to 70°C) provides additional operational margin for applications requiring wider temperature performance.

For applications currently specified for the THS4131CDR, the THS4131IDR is a direct replacement without circuit modification or re-qualification requirements, provided the extended temperature range does not introduce thermal management conflicts in the target application.

Frequently Asked Questions (FAQ)

Q: Can the THS4131IDR be used as a direct replacement for the THS4131CDR?

A: Yes. The THS4131IDR is electrically and mechanically identical to the THS4131CDR across all specified parameters. Both devices feature the same differential amplifier topology, gain bandwidth product (225 MHz), slew rate (52 V/µs), and 8-SOIC package configuration. No circuit modifications are required.

Q: What is the difference between the THS4131CDR and THS4131IDR?

A: The primary difference is the operating temperature range. The THS4131CDR operates from 0°C to 70°C, while the THS4131IDR operates from -40°C to 85°C. Additionally, the THS4131CDR is designated Last Time Buy, while the THS4131IDR maintains Active product status.

Q: Are there any package compatibility issues when substituting the THS4131IDR for the THS4131CDR?

A: No. Both parts use the identical 8-SOIC (0.154", 3.90mm Width) surface mount package. PCB footprints, solder reflow profiles, and assembly processes remain unchanged.

Q: Does the THS4131IDR meet the same compliance requirements as the THS4131CDR?

A: Yes. Both devices are ROHS3 Compliant, REACH Unaffected, and classified as EAR99 for export control purposes. Moisture sensitivity level is MSL 1 (Unlimited) for both parts.

Q: Why is the THS4131CDR designated as Last Time Buy?

A: Last Time Buy designation indicates that Texas Instruments has discontinued this product line. The THS4131IDR represents the active continuation of this device family and is the recommended replacement for new designs and ongoing production.

Q: What is the inventory status of these parts?

A: The THS4131CDR has 2625 pieces in stock as new original inventory. The THS4131IDR has 1500 pieces in stock as new original inventory. Availability may vary based on current demand and supply chain conditions.

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