ISL28268FUZ Equivalent & Substitute Parts

Part Overview

The ISL28268FUZ is a general purpose operational amplifier manufactured by Renesas Electronics Corporation, configured as a dual-channel (2 circuit) rail-to-rail output device in an 8-MSOP surface mount package. This component is classified as obsolete product status, necessitating identification of active equivalent and substitute parts for ongoing design requirements and procurement continuity.

The ISL28268FUZ operates across a supply voltage range of 2.4 V to 5.5 V with an operating temperature range of -40°C to 125°C. Its primary application domain includes general purpose amplification circuits requiring low input bias current (10 pA) and moderate bandwidth characteristics (200 kHz gain bandwidth product).

Due to obsolete product status, substitute parts must be selected from active product lines while maintaining electrical and mechanical compatibility within the specified parameter tolerances.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	ISL28268FUZ	—
Manufacturer	Renesas Electronics Corporation	—
Category	Linear, Amplifiers	—
Amplifier Type	General Purpose	—
Number of Circuits	2	—
Output Type	Rail-to-Rail	—
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	—
Mounting Type	Surface Mount	—
Voltage - Supply Span (Min)	2.4	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature	-40 to 125	°C
Slew Rate	0.1	V/µs
Gain Bandwidth Product	200	kHz
Current - Input Bias	10	pA
Voltage - Input Offset	90	µV
Current - Supply	34 (x2 Channels)	µA
Current - Output / Channel	30	mA
Product Status	Obsolete	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	2 (1 Year)	—

Substitute Part Grouping Explanation

Substitute parts for the ISL28268FUZ are selected based on the following critical parameters that determine functional and mechanical compatibility:

Primary Compatibility Criteria:

Number of Circuits: 2 (dual-channel configuration)
Package / Case: 8-MSOP or 8-VSSOP (0.118", 3.00mm Width)
Mounting Type: Surface Mount
Output Type: Rail-to-Rail
Operating Temperature Range: Minimum -40°C to 125°C support
Voltage Supply Span: Overlap with 2.4 V to 5.5 V range
RoHS3 Compliance: Required for regulatory alignment

Substitution Logic:

Substitute parts are grouped into two categories based on amplifier type and electrical performance characteristics:

Category 1: General Purpose Amplifiers (Direct Functional Equivalents) Parts maintaining general purpose amplifier classification with rail-to-rail output and compatible supply voltage ranges. These include MCP6142T-E/MS, MCP6142T-I/MS, OPA2313IDGK, and OPA2313IDGKR. These parts support the full -40°C to 125°C temperature range or -40°C to 85°C variants.

Category 2: Enhanced Performance Amplifiers (Functional Alternatives) Parts with higher performance specifications including OPA2314AIDGK and OPA2314AIDGKR (CMOS technology with 3 MHz gain bandwidth product) and LTC6269 variants (J-FET technology with 4 GHz gain bandwidth product). These provide superior slew rate and bandwidth characteristics while maintaining dual-channel, rail-to-rail, surface mount configuration.

All substitute parts are active product status with ROHS3 compliance and compatible 8-pin surface mount packaging.

Parameter Comparison

Parameter	ISL28268FUZ	MCP6142T-E/MS	MCP6142T-I/MS	OPA2313IDGK	OPA2313IDGKR	OPA2314AIDGK	OPA2314AIDGKR	LTC6269HMS8E-10#PBF	LTC6269HMS8E-10#TRPBF	LTC6269IMS8E-10#PBF	LTC6269IMS8E-10#TRPBF
Manufacturer	Renesas	Microchip	Microchip	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Analog Devices	Analog Devices	Analog Devices	Analog Devices
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	CMOS	CMOS	J-FET	J-FET	J-FET	J-FET
Number of Circuits	2	2	2	2	2	2	2	2	2	2	2
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	—	—	—	—
Package / Case	8-MSOP	8-MSOP	8-MSOP	8-VSSOP	8-VSSOP	8-VSSOP	8-VSSOP	8-MSOP-EP	8-MSOP-EP	8-MSOP-EP	8-MSOP-EP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Voltage - Supply Span (Min)	2.4 V	1.4 V	1.4 V	1.8 V	1.8 V	1.8 V	1.8 V	3.1 V	3.1 V	3.1 V	3.1 V
Voltage - Supply Span (Max)	5.5 V	6 V	6 V	5.5 V	5.5 V	5.5 V	5.5 V	5.25 V	5.25 V	5.25 V	5.25 V
Operating Temperature (Min)	-40°C	-40°C	-40°C	-40°C	-40°C	-40°C	-40°C	-40°C	-40°C	-40°C	-40°C
Operating Temperature (Max)	125°C	125°C	85°C	125°C	125°C	125°C	125°C	125°C	125°C	85°C	85°C
Slew Rate	0.1 V/µs	0.024 V/µs	0.024 V/µs	0.5 V/µs	0.5 V/µs	1.5 V/µs	1.5 V/µs	1500 V/µs	1500 V/µs	1500 V/µs	1500 V/µs
Gain Bandwidth Product	200 kHz	100 kHz	100 kHz	1 MHz	1 MHz	3 MHz	3 MHz	4 GHz	4 GHz	4 GHz	4 GHz
Current - Input Bias	10 pA	1 pA	1 pA	0.2 pA	0.2 pA	0.2 pA	0.2 pA	0.003 pA	0.003 pA	0.003 pA	0.003 pA
Voltage - Input Offset	90 µV	3 mV	3 mV	500 µV	500 µV	500 µV	500 µV	200 µV	200 µV	200 µV	200 µV
Current - Supply	34 µA (x2)	600 nA (x2)	600 nA (x2)	50 µA (x2)	50 µA (x2)	150 µA (x2)	150 µA (x2)	16.5 mA (x2)	16.5 mA (x2)	16.5 mA (x2)	16.5 mA (x2)
Current - Output / Channel	30 mA	20 mA	20 mA	15 mA	15 mA	20 mA	20 mA	90 mA	90 mA	90 mA	90 mA
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)	1 (Unlimited)	1 (Unlimited)	2 (1 Year)	2 (1 Year)	2 (1 Year)	2 (1 Year)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Recommended Substitutes for Direct Replacement:

For applications requiring closest functional equivalence to the ISL28268FUZ, the following parts are recommended based on active product status and full compliance certifications:

Primary Recommendation: OPA2313IDGKR (Texas Instruments)

Active product status with full -40°C to 125°C operating temperature range
General purpose amplifier classification matching original design intent
Rail-to-rail output configuration
ROHS3 compliant with MSL 2 rating
Supply voltage range 1.8 V to 5.5 V encompasses ISL28268FUZ operating window
Slew rate 0.5 V/µs exceeds ISL28268FUZ specification
Gain bandwidth product 1 MHz provides improved frequency response
Input bias current 0.2 pA significantly lower than ISL28268FUZ
Cut Tape & Digi-Reel packaging format

Secondary Recommendation: MCP6142T-E/MS (Microchip Technology)

Active product status with full -40°C to 125°C operating temperature range
General purpose amplifier classification
Rail-to-rail output configuration
ROHS3 compliant with MSL 1 rating (superior moisture handling)
Supply voltage range 1.4 V to 6 V provides extended operating window
Lowest supply current consumption (600 nA per channel) for power-sensitive applications
Tape & Reel packaging format
Highest inventory availability (40,909 units)

Alternative for Enhanced Performance: OPA2314AIDGKR (Texas Instruments)

Active product status with full -40°C to 125°C operating temperature range
CMOS amplifier technology with 3 MHz gain bandwidth product
Rail-to-rail output configuration
ROHS3 compliant with MSL 2 rating
Supply voltage range 1.8 V to 5.5 V
Slew rate 1.5 V/µs for higher-speed applications
Output current 20 mA per channel
Cut Tape & Digi-Reel packaging format

High-Performance Alternative: LTC6269IMS8E-10#PBF (Analog Devices)

Active product status with -40°C to 85°C operating temperature range
J-FET amplifier technology with 4 GHz gain bandwidth product
Dual-channel configuration in 8-MSOP-EP package
ROHS3 compliant with MSL 1 rating
Supply voltage range 3.1 V to 5.25 V (compatible with ISL28268FUZ 2.4 V to 5.5 V range at upper overlap)
Exceptional slew rate 1500 V/µs for transient-rich applications
Output current 90 mA per channel (3× ISL28268FUZ capability)
Tube packaging format

Selection Criteria by Application:

For low-power, battery-operated designs: MCP6142T-E/MS or MCP6142T-I/MS

For general purpose replacement with improved performance: OPA2313IDGKR

For high-speed signal conditioning: OPA2314AIDGKR

For precision, low-noise applications: LTC6269 series variants

All recommended substitutes maintain surface mount configuration, dual-channel topology, and ROHS3 compliance required for regulatory alignment with the obsolete ISL28268FUZ.

Frequently Asked Questions (FAQ)

Q1: Can the MCP6142T-E/MS directly replace the ISL28268FUZ in existing PCB layouts?

A: The MCP6142T-E/MS uses the same 8-MSOP package footprint (0.118", 3.00mm width) as the ISL28268FUZ, enabling direct PCB substitution without layout modifications. Pin configuration and spacing are identical for surface mount assembly.

Q2: What is the primary difference between OPA2313IDGK and OPA2313IDGKR?

A: Both parts are identical in electrical specifications and performance. The difference is packaging format: OPA2313IDGK is supplied in Tube packaging, while OPA2313IDGKR is supplied in Cut Tape & Digi-Reel format. Selection depends on procurement and assembly line requirements.

Q3: Why do the LTC6269 variants show different operating temperature ranges (-40°C to 125°C versus -40°C to 85°C)?

A: The LTC6269HMS8E-10 variants (both #PBF and #TRPBF) support -40°C to 125°C operation, while the LTC6269IMS8E-10 variants support -40°C to 85°C. The "H" and "I" designations indicate different temperature grades. Selection depends on application temperature requirements.

Q4: Is the ISL28268FUZ pin-compatible with all listed substitute parts?

A: All substitute parts use 8-pin surface mount packages (8-MSOP or 8-VSSOP) with identical pin spacing (0.118", 3.00mm width). Pin assignments are functionally equivalent for dual-channel operational amplifier configurations. Verify specific pinout diagrams for each manufacturer to confirm signal routing compatibility.

Q5: What does MSL (Moisture Sensitivity Level) rating mean for component selection?

A: MSL rating indicates moisture sensitivity during storage and handling. MSL 1 (Unlimited shelf life) is superior to MSL 2 (1 Year shelf life). MCP6142 and LTC6269 series offer MSL 1 rating, providing extended storage capability without special desiccant packaging requirements.

Q6: Can the LTC6269 J-FET amplifiers be used in applications designed for the ISL28268FUZ general purpose amplifier?

A: LTC6269 J-FET amplifiers provide superior performance characteristics (4 GHz bandwidth, 1500 V/µs slew rate, 0.003 pA input bias current) compared to ISL28268FUZ specifications. They are functionally compatible for general purpose applications but operate at higher performance levels. Verify that circuit design does not require the specific lower-bandwidth characteristics of the original part.

Q7: What supply voltage range is common to all substitute parts and the ISL28268FUZ?

A: The overlapping supply voltage range across all substitute parts and the ISL28268FUZ is 3.1 V to 5.25 V. This range ensures compatibility for designs operating within these limits. Applications requiring operation below 3.1 V must use MCP6142 (1.4 V minimum) or OPA2313/OPA2314 (1.8 V minimum) variants.

Q8: Which substitute part offers the lowest power consumption for battery-powered applications?

A: The MCP6142T-E/MS and MCP6142T-I/MS offer the lowest supply current consumption at 600 nanoamperes per channel (1.2 µA total for dual-channel configuration). This represents a 28× reduction compared to the ISL28268FUZ (34 µA per channel).

Q9: Are all substitute parts ROHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant, matching the regulatory compliance status of the ISL28268FUZ. This ensures compatibility with environmental and hazardous substance restrictions in target markets.

Q10: What is the significance of the 8-MSOP-EP package designation for LTC6269 variants?

A: The "EP" designation indicates an Exposed Pad variant of the 8-MSOP package. The exposed pad provides enhanced thermal dissipation capability compared to standard 8-MSOP packages, beneficial for applications requiring higher output current or continuous operation at elevated temperatures.

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