LTV-817S-C Equivalent & Substitute Parts

Part Overview

The LTV-817S-C is a 5000Vrms optoisolator with transistor output manufactured by Lite-On Inc. in a 4-SMD surface mount package. This component provides galvanic isolation for single-channel DC input applications with a maximum output current of 50mA per channel. The part is active and in production with 4068 units currently in stock.

Substitute parts are necessary when the LTV-817S-C becomes unavailable, when alternative current transfer ratio specifications are required for specific circuit performance, or when different operating temperature ranges are needed for environmental conditions outside the original part's -55°C to 110°C specification.

Key Parameters

Parameter	LTV-817S-C
Voltage - Isolation	5000Vrms
Number of Channels	1
Current Transfer Ratio (Min)	200% @ 5mA
Current Transfer Ratio (Max)	400% @ 5mA
Output Type	Transistor
Voltage - Output (Max)	35V
Current - Output / Channel	50mA
Vce Saturation (Max)	200mV
Operating Temperature	-55°C ~ 110°C
Package / Case	4-SMD, Gull Wing
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the LTV-817S-C is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - Isolation: 5000Vrms
Number of Channels: 1
Output Type: Transistor
Current - Output / Channel: 50mA
Vce Saturation (Max): 200mV
Package / Case: 4-SMD, Gull Wing
Input Type: DC

Variable Parameters (Substitution Allowed):

Current Transfer Ratio (Min/Max): Substitute parts may have different CTR specifications
Voltage - Output (Max): Substitute parts may have higher maximum output voltage
Operating Temperature Range: Substitute parts may have narrower temperature ranges

All identified substitute parts are manufactured by Broadcom Limited under the HCPL-817 base product number. These parts maintain identical isolation voltage, channel count, output type, and package configuration while offering variations in current transfer ratio performance and maximum output voltage ratings.

Parameter Comparison

Parameter	LTV-817S-C	HCPL-817-30DE	HCPL-817-36CE	HCPL-817-500E	HCPL-817-50AE	HCPL-817-50BE	HCPL-817-50CE	HCPL-817-50DE	HCPL-817-56AE	HCPL-817-56BE	HCPL-817-56CE
Manufacturer	Lite-On Inc.	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited
Voltage - Isolation	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms
Number of Channels	1	1	1	1	1	1	1	1	1	1	1
Current Transfer Ratio (Min)	200% @ 5mA	300% @ 5mA	200% @ 5mA	50% @ 5mA	80% @ 5mA	130% @ 5mA	200% @ 5mA	300% @ 5mA	80% @ 5mA	130% @ 5mA	200% @ 5mA
Current Transfer Ratio (Max)	400% @ 5mA	600% @ 5mA	400% @ 5mA	600% @ 5mA	160% @ 5mA	260% @ 5mA	400% @ 5mA	600% @ 5mA	160% @ 5mA	260% @ 5mA	400% @ 5mA
Output Type	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor
Voltage - Output (Max)	35V	70V	70V	70V	70V	70V	70V	70V	70V	70V	70V
Current - Output / Channel	50mA	50mA	50mA	50mA	50mA	50mA	50mA	50mA	50mA	50mA	50mA
Voltage - Forward (Vf) (Typ)	1.2V	1.2V	1.2V	1.2V	1.2V	1.2V	1.2V	1.2V	1.2V	1.2V	1.2V
Current - DC Forward (If) (Max)	50 mA	50 mA	50 mA	50 mA	50 mA	50 mA	50 mA	50 mA	50 mA	50 mA	50 mA
Vce Saturation (Max)	200mV	200mV	200mV	200mV	200mV	200mV	200mV	200mV	200mV	200mV	200mV
Rise / Fall Time (Typ)	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs
Operating Temperature	-55°C ~ 110°C	-30°C ~ 100°C	-30°C ~ 100°C	-30°C ~ 100°C	-30°C ~ 100°C	-30°C ~ 100°C	-30°C ~ 100°C	-30°C ~ 100°C	-30°C ~ 100°C	-30°C ~ 100°C	-30°C ~ 100°C
Package / Case	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	4-SMD, Gull Wing	4-SMD, Gull Wing
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	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)
ECCN	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99
HTSUS	8541.49.8000	8541.49.8000	8541.49.8000	8541.49.8000	8541.49.8000	8541.49.8000	8541.49.8000	8541.49.8000	8541.49.8000	8541.49.8000	8541.49.8000

Engineering Selection Recommendations

All substitute parts listed are active products with ROHS3 compliance and EAR99 export classification, matching the regulatory status of the LTV-817S-C. All substitute parts maintain identical isolation voltage, channel configuration, output type, and package footprint.

The primary engineering consideration for substitution is the current transfer ratio specification. The LTV-817S-C specifies 200% to 400% CTR at 5mA. Substitute parts are available with CTR ranges from 50% to 600% at 5mA, allowing selection based on circuit requirements for input current and output switching characteristics.

The maximum output voltage of substitute parts is 70V compared to the LTV-817S-C specification of 35V. This represents an improvement in voltage handling capability and does not restrict substitution in applications designed for the original 35V specification.

Operating temperature range differs between the original part (-55°C to 110°C) and all substitute parts (-30°C to 100°C). Substitution is appropriate for applications operating within the -30°C to 100°C range. Applications requiring operation below -30°C or above 100°C require the original LTV-817S-C specification.

Frequently Asked Questions (FAQ)

Q: Can HCPL-817 series parts directly replace the LTV-817S-C in existing designs?

A: Direct replacement is possible when the application operates within the -30°C to 100°C temperature range and the circuit design accommodates the higher maximum output voltage of 70V. The 4-SMD gull wing package is identical, and all electrical parameters for isolation voltage, channel count, output type, and maximum output current are equivalent.

Q: What is the significance of different current transfer ratio specifications among substitute parts?

A: Current transfer ratio determines the relationship between input LED current and output transistor current. Lower CTR values (50-80%) require higher input current to achieve full output saturation. Higher CTR values (300-600%) achieve saturation with lower input current. Selection depends on the input drive circuit capability and desired output switching speed.

Q: Are all substitute parts available in the same packaging options?

A: The HCPL-817-30DE is supplied in Tube packaging. HCPL-817-36CE is supplied in Tube packaging. All remaining HCPL-817 variants (HCPL-817-500E, HCPL-817-50AE, HCPL-817-50BE, HCPL-817-50CE, HCPL-817-50DE, HCPL-817-56AE, HCPL-817-56BE, HCPL-817-56CE) are supplied in Cut Tape (CT) & Digi-Reel packaging. The 4-SMD gull wing component package is identical across all variants.

Q: What inventory levels are available for substitute parts?

A: HCPL-817-500E has the highest inventory at 12,500 units. HCPL-817-50AE and HCPL-817-56AE each have 20,300 and 20,400 units respectively. HCPL-817-50CE has the lowest inventory at 1,600 units. Inventory levels should be confirmed at time of procurement.

Q: Do all substitute parts meet the same regulatory compliance standards?

A: All substitute parts are ROHS3 compliant with EAR99 export classification and HTSUS code 8541.49.8000, matching the regulatory status of the LTV-817S-C. Broadcom-manufactured HCPL-817 variants include REACH Unaffected status in addition to these certifications.

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