ICS950910 Datasheet, PDF (14/20 Pages) Integrated Circuit Systems – Programmable Timing Control Hub for P4

Integrated
Circuit
Systems, Inc.
ICS950910
Electrical Characteristics - CPUCLKC/T (Current Mode)
T_A = 0 - 70°C; VDD=3.3V +/-5%; C_L = 10-20 pF (unless otherwise specified)
PARAMETER
SYMBOL
CONDITIONS
Current Source Output
Impedance
Zo¹
V_O = V_x
Voltage High
VHigh Statistical measurement on single
Voltage Low
VLow
ended signal using oscilloscope
Max Voltage
Vovs
Measurement on single ended
Min Voltage
Vuds
signal using absolute value.
Crossing Voltage (abs) Vcross(abs)
Crossing Voltage (var)
d-Vcross
Variation of crossing over all
edges
Rise Time
t_r
V_OL = 0.175V, V_OH = 0.525V
Fall Time
t_f
V_OH = 0.525V V_OL = 0.175V
Rise Time Variation
d-t_r
Fall Time Variation
d-t_f
Duty Cycle
d_t3
Measurement from differential
wavefrom
Skew
t_sk3
V_T = 50%
Jitter, Cycle to cycle
t_jcyc-cyc1
V_T = 50%
1_{Guaranteed by design, not 100% tested in production.}
2 _{IOWT can be varied and is selectable thru the MULTSEL pin.}
MIN
3000
660
-150
-450
250
175
175
45
TYP
810
20
850
-15
380
22
290
310
10
10
51
16
48
MAX
850
150
1150
550
140
700
700
125
125
55
100
150
UNITS
Ω
mV
mV
mV
mV
ps
ps
ps
ps
%
ps
ps
Electrical Characteristics - CPUCLKODC/T
TA = 0 - 70°C; VDD = 1.7 V +/-5%; CL = 5 pF (unless otherwise stated)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Output High Voltage V_OH2B Termination to Vpull-up(external)
Output Low Voltage V_OL2B Termination to Vpull-up(external)
Output Low Current
I_OL2B
V_OL = 0.3 V
Rise Time¹
t_r2B
V_OL = 20%, V_OH = 80%
Fall Time¹
Differential voltage-
AC¹
t_f2B
V_DIF
V_OH = 80%, V_OL = 20%,
Differential voltage-
DC¹
V_DIF
Differential Crossover
Voltage¹
V_X
Duty Cycle¹
d_t2B
V_T = 50%
Skew¹
t_sk2B
V_T = 50%
Jitter Diff, Cycle-to-
cycle¹
t_jcyc-cyc2B V_T = VX
Jitter SE, Cycle-to-
cycle¹
t_jcyc-cyc2B V_T = 1.0V
Jitter, Absolute¹
t_jabs2B V_T = 50%
Notes:
1 _{- Guaranteed by design, not 100% tested in production.}
0735A—03/18/04
1
1.2
V
0.4
V
18
mA
0.38 0.9 ns
0.44 0.9 ns
0.4
V
0.2
V
550 1200 1250 mV
45 51.5 55
%
140 200 ps
60 250 ps
100 250 ps
-250
250 ps
14