IMX53CEC datasheet(45/204 Pages) FREESCALE

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Electrical Characteristics

i.MX53xD Applications Processors for Consumer Products, Rev. 2

Freescale Semiconductor

4.5.5

LVDS I/O AC Electrical Characteristics

The differential output transition time waveform is shown in Figure 7.

Figure 7. Differential LVDS Driver Transition Time Waveform

Table 30 shows the AC parameters for LVDS I/O.

Output Pad Slew Rate (High Drive)1

tps

15 pF

35 pF

1.05/0.94

0.52/0.49

——

V/ns

Output Pad Slew Rate (Medium Drive)1

tps

15 pF

35 pF

0.76/0.71

0.36/0.34

——

Output Pad Slew Rate (Low Drive)1

tps

15 pF

35 pF

0.40/0.93

0.18/0.18

——

Output Pad di/dt (High Drive)

tdit

—

82.8

mA/ns

Output Pad di/dt (Medium drive)

tdit

—

65.6

Output Pad di/dt (Low drive)

tdit

—

43.1

Input Transition Times2

trm

—

1 tps is measured between VIL to VIH for rising edge and between VIH to VIL for falling edge.

2 Hysteresis mode is recommended for inputs with transition times greater than 25 ns.

Table 30. AC Electrical Characteristics of LVDS Pad

Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

Transition Low to High Time1

1 Measurement levels are 20-80% from output voltage.

tTLH

Rload = 100

Ω,

Cload = 2 pF

0.26

—

0.5

Transition High to Low Time1

tTHL

0.26

—

0.5

Operating Frequency

—

300

—

MHz

Offset voltage imbalance

Vos

—

150

Table 29. AC Electrical Characteristics of UHVIO Pad (High Output Voltage Mode) (continued)

Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

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