6 Parameter Measurement Information

IN

OUT

CL

See Note B

VO

VI

VOL

VOH

VCCI

0V

tr

50

Input

Generator

(See Note A)

VI

VO

tf

tPLH

tPHL

50%

50%

50%

50%

90%

10%

A.

The input pulse is supplied by a generator having the following characteristics: PRR ≤ 50kHz, 50% duty cycle, tr ≤ 3ns, tf ≤ 3ns, ZO =

50Ω. At the input, a 50Ω resistor is required to terminate Input Generator signal. The 50Ω resistor is not needed in actual application.

B.

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

Figure 6-1. Switching Characteristics Test Circuit and Voltage Waveforms

Input

Generator

(See Note A)

Input

Generator

(See Note A)

IN

OUT

IN

OUT

VO

VO

CL

See Note B

0V

3V

EN

EN

VCCO

VI

VI

VO

VI

tPZL

VCC / 2

50%

VCC

VCC / 2

VOH

0V

VOL

tPLZ

0.5V

VO

VI

tPZH

VCC / 2

50%

VCC

VCC / 2

VOH

0V

0V

tPHZ

0.5V

RL = 1k ±1%

50

RL = 1k ±1%

50

CL

See Note B

A.

The input pulse is supplied by a generator having the following characteristics: PRR ≤ 10kHz, 50% duty cycle, tr ≤ 3ns, tf ≤ 3ns, ZO =

5Ω.

B.

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

Figure 6-2. Enable/Disable Propagation Delay Time Test Circuit and Waveform

ISO7840, ISO7840F

SLLSEN2C – JULY 2015 – REVISED JULY 2025

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