SN65LVDS387, SN75LVDS387, SN65LVDS389

SN75LVDS389, SN65LVDS391, SN75LVDS391

HIGH-SPEED DIFFERENTIAL LINE DRIVERS

SLLS362D – SEPTEMBER 1999 – REVISED MAY 2001

5

POST OFFICE BOX 655303

PARAMETER MEASUREMENT INFORMATION

GND

VI

A

(VOY + VOZ)/2

IOZ

IOY

Y

Z

VOD

VOY

VOC

II

VOZ

Figure 1. Voltage and Current Definitions

±

3.75 k

Ω

0 V

≤ VTEST ≤ 2.4 V

Y

Z

VOD

Input

100

Ω

3.75 k

Ω

Figure 2. VOD Test Circuit

Y

Z

Input

50 pF

49.9

Ω ± 1% (2 Places)

VOC

VO

VOC(PP)

VOC(SS)

0 V

3 V

VI

NOTE: All input pulses are supplied by a generator having the following characteristics: tr or tf ≤ 1 ns, pulse repetition rate (PRR) = 0.5 Mpps,

pulse width = 500

± 10 ns. CL includes instrumentation and fixture capacitance within 0,06 m of the D.U.T. The measurement of VOC(PP)

is made on test equipment with a – 3 dB bandwidth of at least 300 MHz.

Figure 3. Test Circuit and Definitions for the Driver Common-Mode Output Voltage

Y

Z

VOD

Input

CL = 10 pF

(2 Places)

100

Ω ± 1 %

2 V

1.4 V

0.8 V

tPLH

tPHL

100%

80%

20%

0%

Input

Output

0 V

tf

tr

VOD(H)

VOD(L)

NOTE: All input pulses are supplied by a generator having the following characteristics: tr or tf ≤ 1 ns, pulse repetition rate (PRR) = 50 Mpps, pulse

width = 10

± 0.2 ns. CL includes instrumentation and fixture capacitance within 0,06 m of the D.U.T.

Figure 4. Test Circuit, Timing, and Voltage Definitions for the Differential Output Signal