LTV-824 Equivalent & Substitute Parts

Part Overview

The LTV-824 is a 2-channel optoisolator with transistor output manufactured by Lite-On Inc. This component provides 5000Vrms isolation and is designed for AC/DC input applications requiring galvanic isolation in 8-DIP through-hole packaging. The product is active and widely stocked, with 99,277 units available. Substitute parts are identified when equivalent electrical and mechanical parameters align with application requirements, enabling component selection flexibility across qualified alternatives.

Key Parameters

Parameter	LTV-824
Manufacturer	Lite-On Inc.
Number of Channels	2
Voltage - Isolation	5000Vrms
Current Transfer Ratio (Min)	20% @ 1mA
Current Transfer Ratio (Max)	300% @ 1mA
Output Type	Transistor
Voltage - Output (Max)	35V
Current - Output / Channel	50mA
Vce Saturation (Max)	200mV
Operating Temperature	-30°C ~ 100°C
Package / Case	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LTV-824 are qualified based on the following critical parameters:

Package compatibility: 8-DIP (0.300", 7.62mm) through-hole mounting
Channel configuration: 2-channel transistor output
Input type: AC/DC capable
Output characteristics: Transistor output with 50mA per-channel current capability
Isolation voltage: Minimum 5000Vrms
Current transfer ratio range: Minimum 20% at specified input current
Operating temperature range: Minimum -30°C to 100°C
Regulatory compliance: ROHS3 compliant, REACH unaffected

The ILD620 and ISP824X meet these substitution criteria through equivalent or superior electrical performance within the same physical footprint and functional topology.

Parameter Comparison

Parameter	LTV-824	ILD620	ISP824X
Manufacturer	Lite-On Inc.	Vishay Semiconductor Opto Division	Isocom Components 2004 LTD
Number of Channels	2	2	2
Voltage - Isolation	5000Vrms	5300Vrms	7.5Vpk
Current Transfer Ratio (Min)	20% @ 1mA	50% @ 5mA	20% @ 1mA
Current Transfer Ratio (Max)	300% @ 1mA	600% @ 5mA	300% @ 1mA
Rise / Fall Time (Typ)	4µs, 3µs	20µs, 2µs	4µs, 3µs
Input Type	AC, DC	AC, DC	AC, DC
Output Type	Transistor	Transistor	Transistor
Voltage - Output (Max)	35V	70V	35V
Current - Output / Channel	50mA	50mA	50mA
Voltage - Forward (Vf) (Typ)	1.2V	1.15V	1.2V
Vce Saturation (Max)	200mV	400mV	200mV
Operating Temperature	-30°C ~ 100°C	-55°C ~ 100°C	-30°C ~ 100°C
Package / Case	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

LTV-824 (Primary): Active product status with high inventory availability (99,277 units). ROHS3 compliant and REACH unaffected. Suitable for standard isolation applications with -30°C to 100°C operating range.

ILD620 (Vishay): Active product status with 1,234 units in stock. Provides enhanced isolation voltage (5300Vrms) and extended temperature range (-55°C to 100°C). Higher Vce saturation (400mV) and variable rise/fall time characteristics. ROHS3 compliant and REACH unaffected. Applicable where superior isolation margin or lower temperature operation is required.

ISP824X (Isocom): Active product status with 1,048 units available. Electrical parameters match LTV-824 specifications with identical output voltage, saturation, and rise/fall times. ROHS3 compliant and REACH unaffected. Direct functional equivalent for standard applications.

All three parts maintain ROHS3 compliance, unlimited moisture sensitivity rating (MSL 1), and REACH unaffected status, ensuring regulatory consistency across substitution options.

Frequently Asked Questions (FAQ)

Q: Can ILD620 replace LTV-824 in all applications? A: ILD620 meets the core substitution criteria (2-channel, 8-DIP, 50mA output, transistor topology). However, ILD620 exhibits higher Vce saturation (400mV vs. 200mV) and different rise/fall time characteristics (20µs, 2µs vs. 4µs, 3µs). Applications sensitive to saturation voltage or switching speed must evaluate circuit impact.

Q: Is ISP824X a direct replacement for LTV-824? A: ISP824X provides electrical parameter equivalence to LTV-824, including identical current transfer ratio range, output voltage, saturation voltage, and rise/fall times. Both share -30°C to 100°C operating range and 8-DIP through-hole packaging. ISP824X functions as a direct functional equivalent.

Q: What is the isolation voltage difference between LTV-824 and ILD620? A: LTV-824 provides 5000Vrms isolation, while ILD620 provides 5300Vrms. Both exceed 5000Vrms minimum isolation requirements. ILD620 offers additional isolation margin for applications requiring enhanced galvanic separation.

Q: Are all three parts suitable for AC and DC input applications? A: Yes. LTV-824, ILD620, and ISP824X all support AC and DC input types, enabling use in both AC-coupled and DC-coupled isolation circuits.

Q: Do package dimensions differ between these optoisolators? A: No. All three parts use identical 8-DIP (0.300", 7.62mm) through-hole packaging, ensuring direct PCB footprint compatibility without layout modification.

Q: What is the temperature operating range for each part? A: LTV-824 and ISP824X operate from -30°C to 100°C. ILD620 extends the lower limit to -55°C, providing wider temperature coverage for industrial and automotive applications requiring enhanced cold-temperature performance.

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