SN55LVDS31, SN65LVDS31, SN65LVDS3487, SN65LVDS9638

HIGHSPEED DIFFERENTIAL LINE DRIVERS

SLLS261K − JULY 1997 − REVISED MARCH 2004

8

POST OFFICE BOX 655303

PARAMETER MEASUREMENT INFORMATION

VI

A

(VOY + VOZ)/2

IOZ

IOY

Y

Z

VOD

VOY

VOC

II

VOZ

Figure 1. Voltage and Current Definitions

Y

Z

VOD

Input

(see Note A)

CL = 10 pF

(2 Places)

(see Note B)

100

Ω

± 1%

2 V

1.4 V

0.8 V

tPLH

tPHL

100%

80%

20%

0%

Input

VOD

0

tf

tr

NOTES: A. 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.

B. CL includes instrumentation and fixture capacitance within 6 mm of the D.U.T.

Figure 2. Test Circuit, Timing, and Voltage Definitions for the Differential Output Signal

Y

Z

Input

(see Note A)

CL = 10 pF

(2 Places)

(see Note B)

49.9

Ω ± 1% (2 Places)

VOC

A

A

VOC

VOC(PP)

(see Note C)

VOC(SS)

0

3 V

NOTES: A. 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.

B. CL includes instrumentation and fixture capacitance within 6 mm of the D.U.T.

C. 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