LTV-817D Optoisolator Equivalent & Substitute Parts

Part Overview

The LTV-817D is a single-channel optoisolator with transistor output manufactured by Lite-On Inc., rated for 5000Vrms isolation voltage in a 4-DIP through-hole package. This component is active and in production. Substitute parts are identified based on matching isolation voltage, package type, output configuration, and electrical performance parameters within acceptable ranges for the application.

Key Parameters

Parameter	LTV-817D Specification
Isolation Voltage	5000Vrms
Number of Channels	1
Output Type	Transistor
Current Transfer Ratio (Min)	300% @ 5mA
Current Transfer Ratio (Max)	600% @ 5mA
Maximum Output Voltage	35V
Maximum Output Current	50mA
Vce Saturation (Max)	200mV
Operating Temperature Range	-55°C to 110°C
Package Type	4-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LTV-817D are qualified based on the following criteria:

Mandatory Matching Parameters:

Isolation voltage: 5000Vrms or higher
Package type: 4-DIP (0.300", 7.62mm)
Output configuration: Transistor output, single channel
Mounting type: Through hole
Input type: DC
Maximum output current: 50mA minimum
Vce saturation: 200mV maximum
Rise/fall time: 4µs, 3µs
RoHS3 compliance

Allowable Variation Parameters:

Current Transfer Ratio: Substitutes with CTR ranges that overlap or exceed the LTV-817D specification are acceptable
Maximum output voltage: Substitutes rated 70V or 80V exceed the LTV-817D 35V rating and are acceptable
Operating temperature: Substitutes with narrower ranges (-30°C to 100°C) are acceptable for applications within this range

Parameter Comparison

Part Number	Manufacturer	Isolation Voltage	CTR Min @ 5mA	CTR Max @ 5mA	Vout Max	Iout Max	Vce Sat Max	Temp Range	Package
LTV-817D	Lite-On Inc.	5000Vrms	300%	600%	35V	50mA	200mV	-55°C to 110°C	4-DIP
HCPL-817-00AE	Broadcom Limited	5000Vrms	80%	160%	70V	50mA	200mV	-30°C to 100°C	4-DIP
HCPL-817-00BE	Broadcom Limited	5000Vrms	130%	260%	70V	50mA	200mV	-30°C to 100°C	4-DIP
HCPL-817-06BE	Broadcom Limited	5000Vrms	130%	260%	70V	50mA	200mV	-30°C to 100°C	4-DIP
HCPL-817-06CE	Broadcom Limited	5000Vrms	200%	400%	70V	50mA	200mV	-30°C to 100°C	4-DIP
HCPL-817-06LE	Broadcom Limited	5000Vrms	50%	100%	70V	50mA	200mV	-30°C to 100°C	4-DIP
ISP817A	Isocom Components 2004 LTD	5300Vrms	80%	160%	80V	50mA	200mV	-30°C to 100°C	4-DIP
ISP817BX	Isocom Components 2004 LTD	5300Vrms	130%	260%	80V	50mA	200mV	-30°C to 100°C	4-DIP
ISP817CX	Isocom Components 2004 LTD	5300Vrms	300%	600%	80V	50mA	200mV	-30°C to 100°C	4-DIP
ISP817X	Isocom Components 2004 LTD	5300Vrms	50%	600%	80V	50mA	200mV	-30°C to 100°C	4-DIP

Engineering Selection Recommendations

All listed substitute parts maintain active product status and ROHS3 compliance. Selection among substitutes depends on Current Transfer Ratio requirements:

Direct CTR Match (300%-600% @ 5mA): ISP817CX provides identical CTR performance to the LTV-817D with higher isolation voltage (5300Vrms) and extended output voltage rating (80V).

Mid-Range CTR (130%-260% @ 5mA): HCPL-817-00BE, HCPL-817-06BE, and ISP817BX offer reduced CTR with maintained electrical specifications. These are suitable for applications where lower current transfer is acceptable.

Lower CTR (50%-160% @ 5mA): HCPL-817-00AE, HCPL-817-06LE, and ISP817A provide the lowest CTR options. HCPL-817-06LE and ISP817A are suitable only for applications tolerant of reduced current transfer performance.

Temperature Consideration: The LTV-817D operates from -55°C to 110°C. All Broadcom HCPL and Isocom ISP substitutes operate from -30°C to 100°C. Applications requiring operation below -30°C or above 100°C must retain the LTV-817D.

Frequently Asked Questions (FAQ)

Q: Can HCPL-817-06LE substitute for LTV-817D in all applications? A: HCPL-817-06LE meets package, isolation voltage, and electrical specifications but has significantly lower Current Transfer Ratio (50%-100% vs. 300%-600%). Substitution is valid only if the application circuit tolerates reduced CTR performance.

Q: What is the difference between HCPL-817-00BE and HCPL-817-06BE? A: Both parts are electrically identical with matching CTR (130%-260%), isolation voltage, and output specifications. The difference is in packaging designation. Both are functionally equivalent substitutes.

Q: Are ISP817 series parts from Isocom compatible with LTV-817D footprints? A: Yes. ISP817A, ISP817BX, ISP817CX, and ISP817X all use 4-DIP (0.300", 7.62mm) through-hole packages identical to LTV-817D and are pin-compatible.

Q: Why do some substitutes have higher maximum output voltage (70V or 80V) than LTV-817D (35V)? A: Higher voltage ratings provide design margin and are acceptable for direct substitution. Applications designed for 35V operation remain fully compatible with parts rated 70V or 80V.

Q: Which substitute offers the closest electrical match to LTV-817D? A: ISP817CX matches the LTV-817D Current Transfer Ratio specification (300%-600% @ 5mA) exactly while providing higher isolation voltage (5300Vrms vs. 5000Vrms) and output voltage rating (80V vs. 35V).

Q: Can LTV-817D be used in place of HCPL-817-06LE? A: Yes. The LTV-817D has higher Current Transfer Ratio (300%-600% vs. 50%-100%), which is acceptable in applications designed for HCPL-817-06LE. The LTV-817D also supports extended temperature operation (-55°C to 110°C vs. -30°C to 100°C).

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