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ICS9248-64 Datasheet, PDF (7/15 Pages) Integrated Circuit Systems – AMD-K7TM System Clock Chip
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ICS9248-64
Electrical Characteristics - 24_48M, REF(0:1)
TA = 0 - 70º C; VDD = 3.3 V +/-5%; CL = 20 pF (unless otherwise stated)
PARAMETER
SYMBOL
CONDITIONS
Output High Voltage
VOH5 IOH = -12 mA
Output Low Voltage
VOL5
IOL = 9 mA
Output High Current
Output Low Current
Rise Time1
Fall Time1
Duty Cycle1
Jitter, Cycle-to-cycle1
IOH5
IOL5
tr5
tf5
dt5
tjcyc-cyc1
VOH = 2.0 V
VOL = 0.8 V
VOL = 0.4 V, VOH = 2.4 V
VOH = 2.4 V, VOL = 0.4 V
VT = 50%
VT = 1.5 Volts, REF
VT = 1.5 Volts, USB, 24_48M
1Guaranteed by design, not 100% tested in production.
MIN TYP MAX UNITS
2.4 2.8
V
0.32 0.4 V
-27 -22 mA
16
22
mA
2.3
4
ns
2.4
4
ns
45
51
55
%
400 1000 ps
260 500 ps
Electrical Characteristics - CPUCLK (Open Drain)
TA = 0 - 70º C; VDD = 3.3 V +/-5%; CL = 20 pF (unless otherwise stated)
PARAMETER
SYMBOL
CONDITIONS
MIN
Output Impedance
ZO
VO = VX
Output High Voltage
VOH2B
Termination to
Vpull-up(external)
1
Output Low Voltage
VOL2B
Termination to
Vpull-up(external)
Output Low Current
IOL2B
VOL = 0.3 V
18
TYP
50
0.175
21
MAX
1.2
0.4
UNITS
Ω
V
V
mA
Rise Time1
tr2B
VOL = 0.3 V, VOH = 1.2 V
Differential voltage-
AC1
VDIF
Note 2
0.4
Differential voltage-
DC1
VDIF
Note 2
0.2
Differential Crossover
Voltage1
VX
Note 3
550
Duty Cycle1
dt2B
VT = 50%
45
Skew1, CPU to CPU
tsk2B
VT = 50%
Skew1, CPUT to CPUC
tsk2B
VT = 50%
0.85
750
51
100
135
0.9
ns
Vpullup(external)
V
+ 0.6
Vpullup(external)
V
+ 0.6
1100
mV
55
%
250
ps
200
ps
Jitter, Cycle-to-cycle1
tjcyc-cyc2B
VT = VX
110
250
ps
Notes:
1 - Guaranteed by design, not 100% tested in production.
2 - VDIF specifies the minimum input differential voltages (VTR-VCP) required for switching, where VTR is the "true" input
level and VCP is the "complement" input level.
3 - Vpullup(external) = 1.5V, Min = Vpullup(external)/2-150mV; Max=(Vpullup(external)/2)+150mV
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