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SWITCHING CHARACTERISTICS

PARAMETER MEASUREMENT INFORMATION

NC

1

A

2

3

B

5

EN

V BB

Z

Y

4

6

7

VCC

8

GND

9

D.U.T.

VIA

VIB

VCC − 2 V

50

50

S1

IIA

IIB

+

+

−

−

VOY

VOZ

VI

II

+

−

VBB

IBB

IOZ

IOY

VCC

ICC

+

−

VOC

CL

SN65LVDS20

SN65LVP20

SLLS620A – JUNE 2004 – REVISED SEPTEMBER 2005

over recommended operating conditions (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MAX

UNIT

Differential propagation delay time,

300

450

630

low-to-high-level output

Differential propagation delay time,

See Figure 2 and Figure 4

ps

300

450

630

high-level-to-low-level output

20

80

ps

130

LVDS, See Figure 2 and Figure 4

85

115

20%-to-80% differential signal rise time

ps

LVPECL, See Figure 2 and Figure 4

92

120

LVDS, See Figure 2 and Figure 4

85

115

20%-to-80% differential signal fall time

ps

LVPECL, See Figure 2 and Figure 4

92

120

2

3

2-GHz 50%-duty-cycle square-wave input,

ps

See Figure 5

13

16

Peak-to-peak jitter

37

45

ps

See Figure 5

155.52 MHz

0.62

Intrinsic phase jitter

ps

622.08 MHz

0.14

Propagation delay time,

30

high-level-to-high-impedance output

Propagation delay time,

30

low-level-to-high-impedance output

See Figure 2 and Figure 6

ns

Propagation delay time,

30

high-impedance-to-high-level output

Propagation delay time,

30

high-impedance-to-low-level output

(1)

(2)

Part-to-part skew is the magnitude of the difference in propagation delay times between any specified terminals of two devices when

both devices operate with the same supply voltages, at the same temperature, and have identical packages and test circuits.

(3)

Period jitter is the deviation in cycle time of a signal with respect to the ideal period over a random sample of 100,000 cycles.

(4)

Cycle-to-cycle jitter is the variation in cycle time of a signal between adjacent cycles, over a random sample of 1,000 adjacent cycle

pairs.

(1)

(2)

S1 is open for the SN65LVDS20 and closed for the SN65LVP20.

Figure 2. Output Voltage Test Circuit and Voltage and Current Definitions

4