TLP781F(GRL-TP7,F) Equivalent & Substitute Parts

Part Overview

The TLP781F(GRL-TP7,F) is a single-channel optoisolator with transistor output manufactured by Toshiba Semiconductor and Storage. This component provides 5000Vrms isolation voltage and is designed for DC input applications requiring galvanic isolation. The part is currently classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Manufacturer	Toshiba Semiconductor and Storage
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	5000Vrms
Current Transfer Ratio (Min)	100% @ 5mA
Current Transfer Ratio (Max)	200% @ 5mA
Output Type	Transistor
Voltage - Output (Max)	80V
Current - Output / Channel	50mA
Operating Temperature	-55°C ~ 110°C
Mounting Type	Surface Mount
Package / Case	4-SMD, Gull Wing
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the TLP781F(GRL-TP7,F) are classified based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

Voltage - Isolation: 5000Vrms (mandatory match)
Number of Channels: 1 (mandatory match)
Output Type: Transistor (mandatory match)
Current Transfer Ratio: 100% - 200% @ 5mA (mandatory match)
Voltage - Output (Max): 80V (mandatory match)
Current - Output / Channel: 50mA (mandatory match)
Operating Temperature: -55°C ~ 110°C (mandatory match)
Input Type: DC (mandatory match)

Secondary Substitution Criteria (Package Flexibility):

Mounting Type: Surface Mount or Through Hole acceptable
Package / Case: 4-SMD or 4-DIP acceptable

Substitute parts are grouped into two categories:

Direct Manufacturer Substitutes (Toshiba): TLP785F(GRL-T7,F) and TLP785(GRL-TP6,F) maintain identical electrical specifications with package variations (4-DIP and 4-SMD respectively). Both are active products.
Parametric Equivalents (Everlight Electronics): EL816 series variants meet all critical electrical parameters with minor variations in Vce Saturation (200mV vs 400mV) and Rise/Fall Time specifications. All EL816 variants are active products with RoHS3 compliance.

Parameter Comparison

Parameter	TLP781F(GRL-TP7,F)	TLP785F(GRL-T7,F)	TLP785(GRL-TP6,F)	EL816(S)(X)(TD)	EL816(S)(X)(TD)-V	EL816(S)(X)(TU)	EL816(S)(X)(TU)-V	EL816(S1)(X)(TD)	EL816(S1)(X)(TD)-V	EL816(S1)(X)(TU)	EL816(S1)(X)(TU)-V
Manufacturer	Toshiba	Toshiba	Toshiba	Everlight	Everlight	Everlight	Everlight	Everlight	Everlight	Everlight	Everlight
Number of Channels	1	1	1	1	1	1	1	1	1	1	1
Voltage - Isolation	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms
Current Transfer Ratio (Min)	100% @ 5mA	100% @ 5mA	100% @ 5mA	100% @ 5mA	100% @ 5mA	100% @ 5mA	100% @ 5mA	100% @ 5mA	100% @ 5mA	100% @ 5mA	100% @ 5mA
Current Transfer Ratio (Max)	200% @ 5mA	200% @ 5mA	200% @ 5mA	200% @ 5mA	200% @ 5mA	200% @ 5mA	200% @ 5mA	200% @ 5mA	200% @ 5mA	200% @ 5mA	200% @ 5mA
Turn On / Turn Off Time (Typ)	3µs, 3µs	3µs, 3µs	3µs, 3µs	—	—	—	—	—	—	—	—
Rise / Fall Time (Typ)	2µs, 3µs	2µs, 3µs	2µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs
Output Type	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor
Voltage - Output (Max)	80V	80V	80V	80V	80V	80V	80V	80V	80V	80V	80V
Current - Output / Channel	50mA	50mA	50mA	50mA	50mA	50mA	50mA	50mA	50mA	50mA	50mA
Voltage - Forward (Vf) (Typ)	1.15V	1.15V	1.15V	1.2V	1.2V	1.2V	1.2V	1.2V	1.2V	1.2V	1.2V
Current - DC Forward (If) (Max)	60mA	60mA	60mA	60mA	60mA	60mA	60mA	60mA	60mA	60mA	60mA
Vce Saturation (Max)	400mV	400mV	400mV	200mV	200mV	200mV	200mV	200mV	200mV	200mV	200mV
Operating Temperature	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C
Mounting Type	Surface Mount	Through Hole	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	4-SMD, Gull Wing	4-DIP (0.400", 10.16mm)	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing
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
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Toshiba Direct Substitutes (Recommended for Toshiba-Specific Designs):

TLP785F(GRL-T7,F) and TLP785(GRL-TP6,F) are active Toshiba products that maintain complete electrical equivalence to the obsolete TLP781F(GRL-TP7,F). Selection between these two depends on mounting requirements: TLP785F uses through-hole 4-DIP packaging, while TLP785(GRL-TP6,F) uses surface-mount 4-SMD packaging identical to the original part. Both are recommended for designs requiring continuity with Toshiba optoisolator technology.

Everlight EL816 Series (Recommended for Multi-Source Procurement):

The EL816 series from Everlight Electronics provides parametric equivalence across all critical electrical specifications. All EL816 variants are active products with RoHS3 compliance certification. The EL816 series offers superior Vce Saturation performance (200mV maximum versus 400mV for TLP781F), resulting in lower output voltage drop. Rise time is slightly longer (4µs versus 2µs), which is acceptable for most DC isolation applications. The EL816 series is suitable for designs where multi-source component availability and RoHS compliance are required.

Package Considerations:

For surface-mount applications, TLP785(GRL-TP6,F) and all EL816 variants use identical 4-SMD Gull Wing packaging. For through-hole applications, TLP785F(GRL-T7,F) provides the 4-DIP alternative. No PCB layout modifications are required when substituting between surface-mount variants.

Frequently Asked Questions (FAQ)

Q: Can I substitute TLP781F with TLP785 series parts?

A: Yes. TLP785F(GRL-T7,F) and TLP785(GRL-TP6,F) are direct Toshiba substitutes with identical electrical specifications. The primary difference is packaging: TLP785F uses 4-DIP through-hole, while TLP785(GRL-TP6,F) uses 4-SMD surface-mount matching the original TLP781F package.

Q: Are Everlight EL816 parts fully compatible with TLP781F?

A: Yes, for DC isolation applications. All EL816 variants meet the critical electrical parameters: 5000Vrms isolation, 1 channel, 100-200% current transfer ratio, 80V maximum output voltage, and 50mA output current. The EL816 series has lower Vce Saturation (200mV vs 400mV) and slightly longer rise time (4µs vs 2µs), which are acceptable variations for standard optoisolator applications.

Q: What is the difference between EL816(S) and EL816(S1) variants?

A: Both EL816(S) and EL816(S1) variants meet identical electrical specifications provided in this reference. Variant designation differences relate to internal manufacturing or binning parameters not specified in the provided data.

Q: Do I need to change my PCB layout when substituting to EL816?

A: No layout changes are required. All substitute parts use 4-SMD Gull Wing packaging with identical pinout and footprint compatibility.

Q: Which substitute should I choose for new designs?

A: For new designs, select based on supplier availability and compliance requirements. Toshiba TLP785(GRL-TP6,F) provides continuity with the original manufacturer. Everlight EL816 series offers RoHS3 compliance and superior Vce Saturation performance with multi-source availability.

Q: Are there any thermal or reliability differences between these substitutes?

A: All parts share identical operating temperature range (-55°C to 110°C) and MSL rating (1 - Unlimited). Thermal and reliability performance differences are not specified in the provided technical data.

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