XR1008ISO8MTR Equivalent & Substitute Parts

Part Overview

The XR1008ISO8MTR is a general purpose operational amplifier manufactured by MaxLinear, Inc., housed in an 8-SOIC surface mount package. This device features rail-to-rail output capability with a gain bandwidth product of 33 MHz and slew rate of 50 V/µs. The part is currently classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity. Substitute parts must maintain compatibility with the 8-SOIC package format and support the same supply voltage range of 2.5 V to 5.5 V.

Substiute Parts

XR1008ISO8MTR

MaxLinear, Inc.In Stock: 1057XR1008ISO8MTR Datasheet

Current PartRFQ

ADA4084-1ARZ-R7

Analog Devices Inc.In Stock: 5723ADA4084-1ARZ-R7 Datasheet

MFR RecommendedRFQ

MAX4256ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 2149MAX4256ESA+ Datasheet

MFR RecommendedRFQ

MAX4256ESA+T

Analog Devices Inc./Maxim IntegratedIn Stock: 724MAX4256ESA+T Datasheet

MFR RecommendedRFQ

MCP633T-E/SN

Microchip TechnologyIn Stock: 1151MCP633T-E/SN Datasheet

MFR RecommendedRFQ

OPA365AIDR

Texas InstrumentsIn Stock: 17483OPA365AIDR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the XR1008ISO8MTR is determined by strict adherence to the following criteria:

Mandatory Compatibility Parameters:

• Package format: 8-SOIC (0.154", 3.90mm Width)
• Mounting type: Surface Mount
• Output type: Rail-to-Rail
• Number of circuits: 1
• Amplifier type: General Purpose
• Supply voltage range: Minimum 2.5 V, Maximum 5.5 V
• Operating temperature range: -40°C to 125°C

Performance Parameters for Functional Equivalence:

• Gain Bandwidth Product: 33 MHz (substitute must support this bandwidth requirement)
• Slew Rate: 50 V/µs (substitute must meet or exceed this specification)
• Current - Output / Channel: 15 mA (substitute must provide adequate output current)

All identified substitute parts meet the mandatory compatibility parameters. Performance variations in secondary parameters such as input bias current, input offset voltage, and supply current are acceptable provided the substitute maintains the core functional requirements of the application.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: OPA365AIDR

The OPA365AIDR (Texas Instruments) is the preferred substitute for the XR1008ISO8MTR. This device exceeds the original part's performance specifications with a gain bandwidth product of 50 MHz and slew rate of 25 V/µs. The OPA365AIDR maintains full compatibility with the 8-SOIC package, operates across the required -40°C to 125°C temperature range, and is ROHS3 compliant. Current inventory of 17,400 units ensures supply availability. The higher output current capability (65 mA) provides design margin for output-driven applications.

Secondary Recommendation: MCP633T-E/SN

The MCP633T-E/SN (Microchip Technology) offers a balanced alternative with a gain bandwidth product of 24 MHz and slew rate of 10 V/µs. This part maintains the full -40°C to 125°C operating temperature range and is supplied in Tape & Reel packaging. The MCP633T-E/SN is ROHS3 compliant and features exceptionally low supply current consumption of 2.5 mA, making it suitable for power-constrained applications. Current inventory of 1,046 units is available.

Alternative Recommendation: MAX4256ESA+T

The MAX4256ESA+T (Analog Devices Inc./Maxim Integrated) provides a substitute with push-pull rail-to-rail output configuration. This part delivers 22 MHz gain bandwidth product and 2.1 V/µs slew rate with 68 mA output current capability. The device is ROHS3 compliant and available in Tape & Reel packaging with 645 units in stock. Note that the operating temperature range is limited to -40°C to 85°C, which may restrict use in applications requiring the full -40°C to 125°C specification.

Not Recommended: ADA4084-1ARZ-R7

The ADA4084-1ARZ-R7 (Analog Devices Inc.) does not meet the slew rate requirement of the original part, with a specified slew rate of only 4.6 V/µs compared to the XR1008ISO8MTR's 50 V/µs. Additionally, the minimum supply voltage is 3 V, which exceeds the original part's 2.5 V minimum specification. This part is not suitable for direct substitution.

Not Recommended: MAX4256ESA+

The MAX4256ESA+ (Tube packaging) has an operating temperature range limited to -40°C to 85°C, which does not meet the full -40°C to 125°C requirement of the original part. The Tube packaging format also differs from the original Cut Tape & Digi-Reel® specification. Use MAX4256ESA+T (Tape & Reel variant) if MAX4256 series selection is required.

Frequently Asked Questions (FAQ)

Q: Can the OPA365AIDR directly replace the XR1008ISO8MTR without circuit modifications?

A: The OPA365AIDR is pin-compatible in the 8-SOIC package and maintains the same supply voltage range (2.2 V to 5.5 V encompasses the original 2.5 V to 5.5 V specification). No circuit modifications are required for basic substitution. However, the higher slew rate (25 V/µs vs. 50 V/µs) and gain bandwidth product (50 MHz vs. 33 MHz) may affect circuit stability in applications with tight feedback compensation. Circuit simulation or bench testing is appropriate for critical applications.

Q: What is the significance of the operating temperature range difference between MAX4256ESA+ and MAX4256ESA+T?

A: Both parts are electrically identical MAX4256 devices. The difference is packaging format: MAX4256ESA+ is supplied in Tube packaging, while MAX4256ESA+T is supplied in Tape & Reel (TR) format. The operating temperature range of -40°C to 85°C applies to both variants. If your application requires operation to 125°C, neither MAX4256 variant is suitable; select OPA365AIDR or MCP633T-E/SN instead.

Q: Why does the MCP633T-E/SN have significantly lower supply current than other substitutes?

A: The MCP633T-E/SN is specified with 2.5 mA supply current compared to 505 µA for the original XR1008ISO8MTR and higher values for other substitutes. This specification difference reflects the device's design characteristics and operating point. The lower supply current makes the MCP633T-E/SN advantageous for battery-powered or power-limited applications. Verify that the lower slew rate (10 V/µs) and gain bandwidth product (24 MHz) are acceptable for your specific circuit requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All five substitute parts listed (ADA4084-1ARZ-R7, MAX4256ESA+, MAX4256ESA+T, MCP633T-E/SN, and OPA365AIDR) are ROHS3 compliant. The original XR1008ISO8MTR does not specify RoHS status. If RoHS compliance is a design requirement, all identified substitutes meet this criterion.

Q: What is the difference between Cut Tape & Digi-Reel® and Tape & Reel packaging?

A: Both are tape-based packaging formats suitable for automated assembly. Cut Tape & Digi-Reel® (original XR1008ISO8MTR packaging) and Tape & Reel (TR) are compatible with standard pick-and-place equipment. The primary difference is in reel configuration and handling. For most manufacturing environments, either format is acceptable. Verify your assembly equipment specifications if packaging format is critical.

Q: Can I use the ADA4084-1ARZ-R7 in a 2.5 V single-supply application?

A: No. The ADA4084-1ARZ-R7 specifies a minimum supply voltage of 3 V, which exceeds the 2.5 V minimum of the original XR1008ISO8MTR. Applications requiring 2.5 V operation must use OPA365AIDR, MAX4256ESA+, MAX4256ESA+T, or MCP633T-E/SN.

Q: Which substitute has the lowest input offset voltage?

A: The MAX4256ESA+ and MAX4256ESA+T both specify 70 µV input offset voltage, which is lower than the original XR1008ISO8MTR's 5 mV specification. The OPA365AIDR specifies 100 µV. The ADA4084-1ARZ-R7 specifies 40 µV, the lowest among all parts. However, the ADA4084-1ARZ-R7 does not meet other critical specifications and is not recommended for substitution.

Q: Is the higher output current of OPA365AIDR (65 mA) a concern for my circuit?

A: Higher output current capability is not a concern; it provides additional design margin. The output current specification indicates the maximum current the device can source or sink. Your circuit will draw only the current required by the load. The OPA365AIDR's 65 mA capability ensures adequate drive strength for a wider range of load impedances compared to the original 15 mA specification.