VT171P

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Vishay Semiconductors

Rev. 1.2, 09-Dec-2025

3

Document Number: 80507

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Fig. 3 - Test Circuit for tr and tf

Fig. 4 - Switching Times

BASIC CHARACTERISTICS (Tamb = 25 °C, unless otherwise specified)

Fig. 5 - Forward Current vs. Forward Voltage

Fig. 6 - Forward Voltage vs. Ambient Temperature

BASIC CHARACTERISTICS (Tamb = 25 °C, unless otherwise specified)

PARAMETER

TEST CONDITION

SYMBOL

MIN.

TYP.

MAX.

UNIT

COUPLER

Collector current

VCE = 5 V, IF = 15 mA

IC

0.7

1.5

-

mA

Collector emitter saturation voltage

IF = 15 mA, IC = 0.2 mA

VCEsat

--

0.4

V

INPUT (EMITTER)

Forward voltage

IF = 15 mA

VF

11.2

1.4

V

Reverse current

VR = 5 V

IR

-

-

10

μA

Junction capacitance

VR = 0 V, f = 1 MHz

Cj

-25

-

pF

OUTPUT (DETECTOR)

Collector emitter voltage IC

IC = 1 mA

VCEO

20

-

-

V

Emitter collector voltage

IE = 100 μA

VECO

7-

-

V

Collector dark current

VCE = 25 V, IF = 0 A, E = 0 lx

ICEO

-

1

100

nA

SWITCHING CHARACTERISTICS

Rise time

IC = 0.7 mA, VCE = 5 V, RL = 100

Ω (see Fig. 3)

tr

-

14

150

μs

Fall time

IC = 0.7 mA, VCE = 5 V, RL = 100

Ω (see Fig. 3)

tf

-

21

150

μs

Channel I

Channel II

20688

+ 5 V

IC

adjusted by IF

IF

0

IF

R G = 50 Ω

tp

tp = 1 ms

T

= 20

Oscilloscope

50

Ω

100

Ω

R L ≥ 1 MΩ

C L ≤ 20 pF

t p

t

t

0

0

10 %

90 %

100 %

t r

t d

t on

t s

t f

t off

I F

IC

tp

Pulse duration

td

Delay time

tr

Rise time

ton (= td + tr)

Turn-on time

ts

Storage time

t f

Fall time

t

off (= ts + tf)

Turn-off time

96 11698

1

10

100

0.0

0.5

1.0

1.5

2.0

V

F - Forward Voltage (V)

1.0

1.1

1.2

1.3

1.4

-25 -15 -5

5

15 25 35

75 85

T

amb - Ambient Temperature (°C)

I

F = 15 mA

65

55

45