Future Technology Devices Intl.

FT8U100AX Product Data Rev 0.90

Page 13

Differential Driver Characteristics – High Speed

Symbol

Parameter

Conditions

Min

Typ

Max

Units

tr

Rise time

VDD = 3.0 to 3.6V

CL = 50pF

8

12

nS

tf

Fall time

VDD = 3.0 to 3.6V

CL = 50pF

8

12

nS

VCR

Cross Over Voltage

VDD = 3.0 to 3.6V

CL = 50pF

1.8

V

trfmch

Rise/Fall time

matching

VDD = 3.0 to 3.6V

CL = 50pF

90

110

%

Differential Driver Characteristics – Low Speed

Symbol

Parameter

Conditions

Min

Typ

Max

Units

tr

Rise time

VDD = 3.0 to 3.6V

CL = 50pF

85

215

nS

tf

Fall time

VDD = 3.0 to 3.6V

CL = 50pF

95

255

nS

VCR

Cross Over Voltage

VDD = 3.0 to 3.6V

CL = 50pF

1.6

V

trfmch

Rise/Fall time

matching

VDD = 3.0 to 3.6V

CL = 50pF

80

120

%

The differential receiver must exhibit input sensitivity of at least 200mV when both differential data inputs are in the

differential common mode range of 0.8 to 2.5V as shown above. These values are shown in the DC Characteristics

table on page 9.

Differential Input Sensitivity Range

The single ended receivers are standard CMOS buffers with adjusted thresholds and which exhibit hysteresis –

necessary to reduce sensitivity to noise (see VHYS on the DC Characteristcs table, page 9).

Common Mode Input Voltage (volts

)

0.0

0.0

0.4

0.8

1.2

1.6

2.0

2.4

2.8

3.2

0.2

0.4

0.6

0.8

1.0