LTV-847C Equivalent & Substitute Parts

Part Overview

The LTV-847C is a 4-channel optoisolator with transistor output manufactured by Lite-On Inc., designed for applications requiring 5000Vrms isolation. This component features DC input, transistor output configuration, and is housed in a 16-DIP package. The LTV-847C is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	LTV-847C
Manufacturer	Lite-On Inc.
Category	Optoisolators
Number of Channels	4
Voltage - Isolation	5000Vrms
Current Transfer Ratio (Min)	50% @ 5mA
Current Transfer Ratio (Max)	600% @ 5mA
Output Type	Transistor
Voltage - Output (Max)	35V
Current - Output / Channel	50mA
Vce Saturation (Max)	200mV
Operating Temperature	-30°C ~ 110°C
Package / Case	16-DIP (0.300", 7.62mm)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the LTV-847C optoisolator is determined by strict alignment of the following critical parameters:

Channel Configuration: 4 channels required
Isolation Voltage: 5000Vrms minimum
Output Type: Transistor output
Package: 16-DIP (0.300", 7.62mm)
Input Type: DC
Current Transfer Ratio Range: 50% to 600% @ 5mA
Output Current Capability: 50mA per channel
Vce Saturation: 200mV maximum

The LTV-846 and LTV-847 are identified as substitutes based on matching these core electrical and mechanical specifications. Variations in maximum output voltage and operating temperature range do not preclude substitution when the application requirements fall within the substitute part's rated limits.

Parameter Comparison

Parameter	LTV-847C (Main)	LTV-846 (Substitute)	LTV-847 (Substitute)
Manufacturer	Lite-On Inc.	Lite-On Inc.	Lite-On Inc.
Number of Channels	4	4	4
Voltage - Isolation	5000Vrms	5000Vrms	5000Vrms
Current Transfer Ratio (Min)	50% @ 5mA	50% @ 5mA	50% @ 5mA
Current Transfer Ratio (Max)	600% @ 5mA	600% @ 5mA	600% @ 5mA
Output Type	Transistor	Transistor	Transistor
Voltage - Output (Max)	35V	80V	35V
Current - Output / Channel	50mA	50mA	50mA
Vce Saturation (Max)	200mV	200mV	200mV
Rise / Fall Time (Typ)	4µs, 3µs	4µs, 3µs	4µs, 3µs
Operating Temperature	-30°C ~ 110°C	-30°C ~ 100°C	-30°C ~ 110°C
Package / Case	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole	Through Hole
Product Status	Obsolete	Active	Active

Engineering Selection Recommendations

The LTV-846 and LTV-847 are both active products from Lite-On Inc. and serve as direct substitutes for the obsolete LTV-847C. Both substitute parts maintain identical isolation voltage, channel count, current transfer ratio specifications, and package configuration.

The LTV-846 features an elevated maximum output voltage rating of 80V compared to the LTV-847C's 35V, providing additional design margin for applications with higher voltage requirements. The LTV-846 operates within a -30°C to 100°C temperature range, which is 10°C narrower at the upper limit than the LTV-847C.

The LTV-847 maintains the identical operating temperature range of -30°C to 110°C as the LTV-847C and matches the 35V maximum output voltage specification. This part provides the closest electrical and thermal performance alignment with the original component.

Both substitute parts carry RoHS3 compliance and REACH unaffected status, supporting modern manufacturing and environmental requirements. Selection between LTV-846 and LTV-847 should be based on specific application temperature requirements and output voltage constraints.

Frequently Asked Questions (FAQ)

Q: Can the LTV-846 replace the LTV-847C in all applications?

A: The LTV-846 is electrically compatible with the LTV-847C for applications operating within -30°C to 100°C. Applications requiring operation above 100°C or at the upper temperature limit of 110°C require the LTV-847. The LTV-846's higher maximum output voltage (80V vs. 35V) does not restrict substitution in circuits designed for 35V operation.

Q: What is the primary difference between the LTV-846 and LTV-847 substitutes?

A: The LTV-846 provides a maximum output voltage of 80V, while the LTV-847 matches the LTV-847C specification at 35V. The LTV-846 operates to 100°C maximum, while the LTV-847 extends to 110°C. Both maintain identical isolation voltage, channel configuration, and current transfer ratio specifications.

Q: Are the substitute parts pin-compatible with the LTV-847C?

A: Yes. Both the LTV-846 and LTV-847 use the 16-DIP (0.300", 7.62mm) package with identical through-hole mounting configuration, ensuring direct mechanical and electrical compatibility.

Q: What compliance certifications apply to the substitute parts?

A: Both LTV-846 and LTV-847 are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.

Q: Which substitute part should be selected for new designs?

A: For new designs, either the LTV-846 or LTV-847 is acceptable based on application requirements. The LTV-847 is recommended when maximum operating temperature of 110°C is required. The LTV-846 is suitable for applications with maximum operating temperature of 100°C and may offer cost advantages due to higher inventory availability.

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