MAX211

5V MULTICHANNEL RS232 LINE DRIVER/RECEIVER

WITH ±15kV ESD PROTECTION

SLLS567E − MAY 2003 − REVISED JANUARY 2004

8

POST OFFICE BOX 655303

PARAMETER MEASUREMENT INFORMATION

50

Ω

TEST CIRCUIT

VOLTAGE WAVEFORMS

0 V

3 V

Output

Input

VOL

VOH

tPLH (D)

Generator

(see Note B)

RL

RS-232

Output

tPHL (D)

CL

(see Note A)

SR(tr)

+

6V

t

PHL (D)

or t

PLH (D)

NOTES: A. CL includes probe and jig capacitance.

B. The pulse generator has the following characteristics: PRR = 120 kbit/s, ZO = 50 Ω, 50% duty cycle, tr ≤ 10 ns, tf ≤ 10 ns.

1.5 V

1.5 V

3 V

−3 V

3 V

−3 V

0 V

SHDN

Figure 2. Driver Slew Rate and Propagation Delay Times

TEST CIRCUIT

VOLTAGE WAVEFORMS

0 V

3 V

Output

Input

VOL

VOH

tPLH (D)

tPHL (D)

50%

50%

NOTES: A. CL includes probe and jig capacitance.

B. The pulse generator has the following characteristics: PRR = 120 kbit/s, ZO = 50 Ω, 50% duty cycle, tr ≤ 10 ns, tf ≤ 10 ns.

1.5 V

1.5 V

50

Ω

Generator

(see Note B)

RL

RS-232

Output

CL

(see Note A)

0 V

SHDN

Figure 3. Driver Pulse Skew

TEST CIRCUIT

VOLTAGE WAVEFORMS

50

Ω

50%

50%

−3 V

3 V

1.5 V

1.5 V

Output

Input

VOL

VOH

tPHL (R)

Generator

(see Note B)

tPLH (R)

Output

CL

(see Note A)

NOTES: A. CL includes probe and jig capacitance.

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

0 V

SHDN

0 V

EN

Figure 4. Receiver Propagation Delay Times