TLP781F(D4YH-TP7,F Equivalent & Substitute Parts

Part Overview

The TLP781F(D4YH-TP7,F is a single-channel optoisolator with transistor output manufactured by Toshiba Semiconductor and Storage. This component provides 5000Vrms isolation and is designed for DC input applications requiring galvanic isolation. The part is currently listed as obsolete, making identification of equivalent and substitute components essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer	Toshiba Semiconductor and Storage
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	5000Vrms
Current Transfer Ratio (Min)	75% @ 5mA
Current Transfer Ratio (Max)	150% @ 5mA
Turn On / Turn Off Time (Typ)	3µs, 3µs
Rise / Fall Time (Typ)	2µs, 3µs
Input Type	DC
Output Type	Transistor
Voltage - Output (Max)	80V
Current - Output / Channel	50mA
Voltage - Forward (Vf) (Typ)	1.15V
Current - DC Forward (If) (Max)	60mA
Vce Saturation (Max)	400mV
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

Substitution of the TLP781F(D4YH-TP7,F is determined by equivalence across the following critical parameters:

Voltage - Isolation: 5000Vrms
Number of Channels: 1
Current Transfer Ratio: 75% (Min) @ 5mA, 150% (Max) @ 5mA
Turn On / Turn Off Time: 3µs, 3µs
Rise / Fall Time: 2µs, 3µs
Input Type: DC
Output Type: Transistor
Voltage - Output (Max): 80V
Current - Output / Channel: 50mA
Voltage - Forward (Vf) (Typ): 1.15V
Current - DC Forward (If) (Max): 60mA
Vce Saturation (Max): 400mV
Operating Temperature: -55°C ~ 110°C

Substitute parts are grouped into two categories: direct manufacturer equivalents (differing only in package type) and parametric equivalents (matching all electrical specifications with identical or compatible packaging).

Parameter Comparison

Parameter	TLP781F(D4YH-TP7,F	TLP785F(D4YHT7,F	TLP785(D4YH-T6,F	TLP785(YH-TP6,F	TLP785F(YH-TP7,F
Manufacturer	Toshiba	Toshiba	Toshiba	Toshiba	Toshiba
Number of Channels	1	1	1	1	1
Voltage - Isolation	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms
Current Transfer Ratio (Min)	75% @ 5mA	75% @ 5mA	75% @ 5mA	75% @ 5mA	75% @ 5mA
Current Transfer Ratio (Max)	150% @ 5mA	150% @ 5mA	150% @ 5mA	150% @ 5mA	150% @ 5mA
Turn On / Turn Off Time (Typ)	3µs, 3µs	3µs, 3µs	3µs, 3µs	3µs, 3µs	3µs, 3µs
Rise / Fall Time (Typ)	2µs, 3µs	2µs, 3µs	2µs, 3µs	2µs, 3µs	2µs, 3µs
Input Type	DC	DC	DC	DC	DC
Output Type	Transistor	Transistor	Transistor	Transistor	Transistor
Voltage - Output (Max)	80V	80V	80V	80V	80V
Current - Output / Channel	50mA	50mA	50mA	50mA	50mA
Voltage - Forward (Vf) (Typ)	1.15V	1.15V	1.15V	1.15V	1.15V
Current - DC Forward (If) (Max)	60mA	60mA	60mA	60mA	60mA
Vce Saturation (Max)	400mV	400mV	400mV	400mV	400mV
Operating Temperature	-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
Package / Case	4-SMD, Gull Wing	4-DIP (0.400", 10.16mm)	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	Not specified	Not specified	RoHS Compliant	Not specified	Not specified

Engineering Selection Recommendations

All substitute parts listed maintain identical electrical specifications and operating characteristics to the TLP781F(D4YH-TP7,F. Selection between substitutes depends on application requirements:

For surface mount applications requiring the same 4-SMD, Gull Wing package format, TLP785(D4YH-T6,F, TLP785(YH-TP6,F, and TLP785F(YH-TP7,F are direct parametric equivalents. All three are active products with current manufacturing status.

For through-hole applications, TLP785F(D4YHT7,F provides identical electrical performance in a 4-DIP package format, suitable for breadboard prototyping or legacy PCB designs.

TLP785(D4YH-T6,F carries RoHS Compliant certification, applicable to designs requiring environmental compliance documentation.

Frequently Asked Questions (FAQ)

Q: Can TLP785F(D4YHT7,F be used as a direct replacement for TLP781F(D4YH-TP7,F?

A: TLP785F(D4YHT7,F is electrically equivalent but uses a through-hole 4-DIP package instead of surface mount 4-SMD. PCB layout modification is required. For surface mount applications, use TLP785(D4YH-T6,F, TLP785(YH-TP6,F, or TLP785F(YH-TP7,F.

Q: What is the difference between the TLP785 variants listed?

A: All TLP785 variants share identical electrical specifications. Differences exist only in packaging designations and RoHS compliance status. TLP785(D4YH-T6,F is RoHS Compliant; others are not specified. All use 4-SMD, Gull Wing surface mount packaging except TLP785F(D4YHT7,F.

Q: Is the obsolete status of TLP781F(D4YH-TP7,F a concern for new designs?

A: The TLP785 series provides active, current-production alternatives with identical electrical performance. These parts are suitable for new designs and ongoing production support.

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

A: All parts share the same operating temperature range (-55°C ~ 110°C) and electrical characteristics. No thermal or reliability differences are indicated in the provided specifications.

Q: What inventory levels are available for each substitute?

A: TLP785(YH-TP6,F has the highest inventory at 16,639 pieces. TLP785(D4YH-T6,F has 4,700 pieces. TLP785F(YH-TP7,F has 803 pieces. TLP785F(D4YHT7,F has 792 pieces.

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