SMSC DS – USB97CFDC

Page 12

Rev. 12/15/2000

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

COMMENTS

O24 Type Buffer

Low Output Level

High Output Level

Output Leakage

2.4

-10

0.4

+10

V

V

µA

IOL = 24mA

IOH = -12mA

VIN = 0 to Vcc (Note 1)

OD24 Type Buffer

Low Output Level

Output Leakage

-10

0.4

+10

V

µA

IOL = 24mA

VIN = 0 to Vcc (Note 1)

IO-U

Note 2

Supply Current Active

Supply Current

Standby

30

120

75

300

MA

µA

All outputs open.

Note 1: Output leakage is measured with the current pins in high impedance.

Note 2: See Appendix A for USB DC electrical characteristics.

LIMITS

PARAMETER

SYMBOL

MIN

TYP

MAX

UNIT

TEST CONDITION

Clock Input Capacitance

20

pF

Input Capacitance

10

pF

Output Capacitance

20

pF

All pins except USB pins

(and pins under test tied

to AC ground)

AC PARAMETERS

t2

t1

t2

CLOCKI

FIGURE 1 - INPUT CLOCK TIMING

Table 2 – Input Clock Timing Parameters

NAME

DESCRIPTION

MIN

TYP

MAX

UNITS

t1

Clock Cycle Time for 14.318MHz

69.84

ns

t2

Clock High Time/Low Time for 24MHz

41.9/

27.9

27.9/

41.9

ns

Clock Rise Time/Fall Time (not shown)

5

ns