Input

Generator

50

OUT

RL= 1 k

EN

VO

VI

IN

0V

CL

W

W

1%

±

NOTE A

NOTE

B

0 V

VO

VI

0.5 V

50%

Input

Generator

50

OUT

RL= 1 k

EN

VO

VI

IN

3V

CL

W

W

1%

±

NOTE A

NOTE

B

0 V

0 V

VI

50%

0.5 V

tPZH

VO

VOH

tPHZ

V

/2

CC

V

/2

CC

VCC

tPZL

VCC

V

/2

CC

VCC

tPLZ

VCC

V

/2

CC

VOL

IN

OUT

VO

C L

Input

Generator

50

V I

W

NOTE A

NOTE

B

10%

90%

50%

0 V

50%

VI

V

/2

CC

VO

tPLH

VOH

tPHL

tr

tf

VCC1

VOL

V

/2

CC

ISO7640FM, ISO7641FM

www.ti.com

SLLSE89G – SEPTEMBER 2011 – REVISED JANUARY 2015

7 Parameter Measurement Information

A.

The input pulse is supplied by a generator having the following characteristics: PRR

≤ 50 kHz, 50% duty cycle, tr ≤ 3

ns, tf ≤ 3ns, ZO = 50 Ω. At the input, 50-Ω resistor is required to terminate Input Generator signal. It is not needed in

actual application.

B.

CL = 15 pF and includes instrumentation and fixture capacitance within ±20%.

Figure 9. Switching Characteristics Test Circuit and Voltage Waveforms

A.

The input pulse is supplied by a generator having the following characteristics: PRR

≤ 10 kHz, 50% duty cycle,

tr ≤ 3 ns, tf ≤ 3 ns, ZO = 50 Ω.

B.

CL = 15 pF and includes instrumentation and fixture capacitance within ±20%.

Figure 10. Enable/Disable Propagation Delay Time Test Circuit and Waveform

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