LTV-M701 Equivalent & Substitute Parts

Part Overview

The LTV-M701 is an optoisolator with Darlington output configuration manufactured by Lite-On Inc. This single-channel device provides 3750Vrms isolation voltage and is designed for high-speed switching applications with 200ns turn-on and 7µs turn-off times. The part is active and in production with 973 units currently in stock. Substitute parts are necessary when addressing supply constraints, packaging preferences, or when alternative output configurations better suit specific circuit requirements.

Key Parameters

Parameter	LTV-M701
Manufacturer	Lite-On Inc.
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	3750Vrms
Output Type	Darlington with Base
Current Transfer Ratio (Min)	500% @ 1.6mA
Current Transfer Ratio (Max)	2600% @ 1.6mA
Turn On / Turn Off Time (Typ)	200ns, 7µs
Current - Output / Channel	60mA
Voltage - Forward (Vf) (Typ)	1.3V
Current - DC Forward (If) (Max)	20mA
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	6-SOIC (0.173", 4.40mm Width), 5 Leads
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitution of the LTV-M701 is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Single channel configuration (1 Channel)
Isolation voltage of 3750Vrms or higher
Surface mount packaging in 6-SOIC format with 5 leads
DC input type
RoHS3 compliance
MSL rating of 1 (Unlimited)

Output Configuration Consideration: The LTV-M701 features Darlington output with base access. Substitute parts listed include both Darlington and transistor output configurations. Transistor output optoisolators (ACPL-M43 and ACPL-M50 series) operate with different current transfer ratios and switching characteristics, requiring circuit-level evaluation for functional equivalence.

Electrical Performance Variations: Substitute parts exhibit different current transfer ratios, output current capabilities, and switching speeds. The ACPL-M50L series provides higher output voltage capability (24V vs. unspecified for LTV-M701) and different CTR specifications. The ACPL-M43 series offers higher isolation voltage (4000Vrms) with automotive qualification.

Parameter Comparison

Parameter	LTV-M701	ACPL-M43T-000E	ACPL-M43T-500E	ACPL-M43U-000E	ACPL-M50L-000E	ACPL-M50L-500E	ACPL-M50L-560E
Manufacturer	Lite-On Inc.	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited
Number of Channels	1	1	1	1	1	1	1
Voltage - Isolation	3750Vrms	4000Vrms	4000Vrms	3750Vrms	3750Vrms	3750Vrms	3750Vrms
Output Type	Darlington with Base	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor
Current Transfer Ratio (Min)	500% @ 1.6mA	32% @ 10mA	32% @ 10mA	32% @ 10mA	100% @ 3mA	100% @ 3mA	100% @ 3mA
Current Transfer Ratio (Max)	2600% @ 1.6mA	100% @ 10mA	100% @ 10mA	80% @ 10mA	200% @ 3mA	200% @ 3mA	200% @ 3mA
Turn On / Turn Off Time (Typ)	200ns, 7µs	150ns, 500ns	150ns, 500ns	200ns, 300ns	200ns, 380ns	200ns, 380ns	200ns, 380ns
Current - Output / Channel	60mA	8mA	8mA	8mA	8mA	8mA	8mA
Voltage - Forward (Vf) (Typ)	1.3V	1.55V	1.55V	1.5V	1.5V	1.5V	1.5V
Current - DC Forward (If) (Max)	20mA	20mA	20mA	20mA	20mA	20mA	20mA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	6-SOIC (0.173", 4.40mm Width), 5 Leads	6-SOIC (0.173", 4.40mm Width), 5 Leads	6-SOIC (0.173", 4.40mm Width), 5 Leads	6-SOIC (0.173", 4.40mm Width), 5 Leads	6-SOIC (0.173", 4.40mm Width), 5 Leads	6-SOIC (0.173", 4.40mm Width), 5 Leads	6-SOIC (0.173", 4.40mm Width), 5 Leads
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts maintain active product status and ROHS3 compliance, ensuring regulatory alignment with the LTV-M701.

ACPL-M43 Series (ACPL-M43T-000E, ACPL-M43T-500E, ACPL-M43U-000E): These Broadcom optoisolators provide transistor output configuration with isolation voltage at or above the LTV-M701 specification. ACPL-M43T variants offer 4000Vrms isolation with automotive-grade qualification (AEC-Q100) and extended operating temperature to 125°C. ACPL-M43U-000E matches the 3750Vrms isolation voltage. The primary difference is output current capability (8mA vs. 60mA for LTV-M701) and current transfer ratio characteristics. Packaging availability includes both tube and cut tape options.

ACPL-M50L Series (ACPL-M50L-000E, ACPL-M50L-500E, ACPL-M50L-560E): These transistor output optoisolators provide 3750Vrms isolation matching the LTV-M701 specification. The ACPL-M50L series features higher maximum output voltage (24V) and different current transfer ratio performance (100-200% @ 3mA). Operating temperature extends to 105°C. Significant inventory availability exists for ACPL-M50L-500E (30,300 units) and ACPL-M50L-560E (27,300 units) in cut tape packaging.

Output Configuration Impact: The LTV-M701 Darlington output with base access differs functionally from the transistor outputs of all substitute parts. Circuit redesign may be required to accommodate this output type difference.

Frequently Asked Questions (FAQ)

Q: Can ACPL-M43 and ACPL-M50L series directly replace the LTV-M701?

A: Direct pin-for-pin replacement is not possible due to output configuration differences. The LTV-M701 provides Darlington output with base access, while all listed substitutes feature standard transistor outputs. Circuit-level modifications are necessary.

Q: What are the key electrical differences between substitute options?

A: Current transfer ratio (CTR) specifications differ significantly. The LTV-M701 operates at 500-2600% CTR @ 1.6mA input current. ACPL-M43 series operates at 32-100% CTR @ 10mA, while ACPL-M50L series operates at 100-200% CTR @ 3mA. Output current capability is also reduced in substitutes (8mA vs. 60mA). These differences require input/output circuit recalculation.

Q: Are all substitutes compatible with the same package footprint?

A: Yes. All parts use identical 6-SOIC (0.173", 4.40mm Width) packaging with 5 leads, enabling PCB footprint compatibility.

Q: Which substitute offers the highest isolation voltage?

A: ACPL-M43T-000E and ACPL-M43T-500E provide 4000Vrms isolation, exceeding the LTV-M701 specification of 3750Vrms.

Q: What is the temperature operating range difference?

A: The LTV-M701 operates from -40°C to 85°C. ACPL-M43 series extends to 125°C, and ACPL-M50L series to 105°C, providing wider temperature margins for demanding applications.

Q: Do all substitutes meet RoHS compliance?

A: Yes. All listed substitute parts are ROHS3 compliant and maintain MSL rating of 1 (Unlimited), matching the LTV-M701 environmental specifications.

Q: What packaging options are available for substitutes?

A: ACPL-M43T-000E and ACPL-M43U-000E are available in tube packaging. ACPL-M43T-500E, ACPL-M50L-500E, and ACPL-M50L-560E are available in cut tape (CT) & Digi-Reel® format. ACPL-M50L-000E is available in tube packaging.

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