Plus RS-232 User Manual download pdf (Page 7)

TEST CIRCUIT VOLTAGE WAVEFORMS

50 Ω

−3 V

3 V

Output

Input

PHL

Generator

(see Note B)

PLH

Output

(see Note A)

NOTES: A. C

includes probe and jig capacitance.

B. The pulse generator has the following characteristics: Z

= 50 Ω, 50% duty cycle, t

≤ 10 ns, t

≤ 10 ns.

0 V 0 V

50% 50%

50 Ω

TEST CIRCUIT VOLTAGE WAVEFORMS

0 V

2.25 V

Output

Input

PLH

Generator

(see Note B)

3 V

FORCEOFF

RS-232

Output

PHL

(see Note A)

NOTES: A. C

includes probe and jig capacitance.

B. The pulse generator has the following characteristics: PRR = 250 kbit/s, Z

= 50 Ω, 50% duty cycle, t

≤ 10 ns, t

≤ 10 ns.

50%

1.125 V

50 Ω

TEST CIRCUIT VOLTAGE WAVEFORMS

−3 V

3 V

0 V

3 V

Output

Input

TLH

Generator

(see Note B)

3 V

FORCEOFF

RS-232

Output

THL

(see Note A)

SR(tr) +

6 V

THL

or t

TLH

NOTES: A. C

includes probe and jig capacitance.

B. The pulse generator has the following characteristics: PRR = 250 kbit/s, Z

= 50 Ω, 50% duty cycle, t

≤ 10 ns, t

≤ 10 ns.

TRS3318

www.ti.com

SLLS820A –AUGUST 2007–REVISED OCTOBER 2013

PARAMETER MEASUREMENT INFORMATION

Figure 1. Driver Slew Rate

Figure 2. Driver Pulse Skew

Figure 3. Receiver Propagation Delay Times

Product Folder Links: TRS3318

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