6 Parameter Measurement Information

50 W

TEST CIRCUIT

VOLTAGE WAVEFORMS

−3 V

−3 V

3 V

3 V

0 V

3 V

Output

Input

VOL

VOH

tTLH

Generator

(see Note B)

RL

3 V

FORCEOFF

RS-232

Output

tTHL

CL

(see Note A)

SR(tr)

6 V

t

THL or tTLH

NOTES: A. CL includes probe and jig capacitance.

B. The pulse generator has the following characteristics: PRR = 250 kbit/s (MAX3243C/I) and 1 Mbit/s (MAX3243FC/I),

ZO = 50 W, 50% duty cycle, tr ≤10 ns, tf ≤10 ns.

Figure 6-1. Driver Slew Rate

50 W

TEST CIRCUIT

VOLTAGE WAVEFORMS

0 V

3 V

Output

Input

VOL

VOH

tPLH

Generator

(see Note B)

RL

3 V

FORCEOFF

RS-232

Output

tPHL

CL

(see Note A)

NOTES: A. CL includes probe and jig capacitance.

B. The pulse generator has the following characteristics: PRR = 250 kbit/s (MAX3243C/I) and 1 Mbit/s (MAX3243FC/I),

ZO = 50 W, 50% duty cycle, tr ≤10 ns, tf ≤10 ns.

50%

50%

1.5 V

1.5 V

Figure 6-2. Driver Pulse Skew

TEST CIRCUIT

VOLTAGE WAVEFORMS

50 W

−3 V

3 V

Output

Input

VOL

VOH

tPHL

Generator

(see Note B)

tPLH

Output

CL

(see Note A)

3 V or 0 V

FORCEON

NOTES: A. CL includes probe and jig capacitance.

B. The pulse generator has the following characteristics: ZO = 50 W, 50% duty cycle, tr ≤10 ns, tf ≤10 ns.

3 V

FORCEOFF

1.5 V

1.5 V

50%

50%

Figure 6-3. Receiver Propagation Delay Times

MAX3243

SLLS350Q – APRIL 1999 – REVISED AUGUST 2024

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