ICS952011 Datasheet, PDF (21/25 Pages) Integrated Circuit Systems – Programmable Timing Control Hub for P4 processor

Integrated
Circuit
Systems, Inc.
ICS952011
Electrical Characteristics - CPUCLKT/C
T_A = 0 - 70°C; V_DD=3.3V +/-5%; C_L = 10-20 pF (unless otherwise specified)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Current Source
Output Impedance
Zo¹
V_O = V_x
3000
Ω
Voltage High
Voltage Low
VHigh
VLow
Statistical measurement on single ended 660 757
signal using oscilloscope math function. -150 9
850
150
mV
Max Voltage
Min Voltage
Vovs
Vuds
Measurement on single ended signal using
absolute value.
-450
775
-3
1150
mV
Crossing Voltage
(abs)
Vcross(abs)
250 386 550 mV
Crossing Voltage
(var)
d-Vcross
Variation of crossing over all edges
42 140 mV
Rise Time
t_r
V_OL = 0.175V, V_OH = 0.525V
175 300 700 ps
Fall Time
t_f
V_OH = 0.525V V_OL = 0.175V
175 280 700 ps
Rise Time Variation
d-t_r
125 ps
Fall Time Variation
d-t_f
125 ps
Duty Cycle
d_t3
Measurement from differential wavefrom 45
50
55
%
Skew
t_sk3
V_T = 50%
32 100 ps
Jitter, Cycle to cycle t_jcyc-cyc1
V_T = 50%
43 150 ps
Electrical Characteristics - ZCLK
T_A = 0 - 70°C; V_DD=3.3V +/-5%; C_L = 10-30 pF (unless otherwise specified)
PARAMETER
SYMBOL
CONDITIONS
Output Frequency
Output Impedance
Output High Voltage
Output Low Voltage
Output High Current
Output Low Current
Rise Time
Fall Time
Duty Cycle
Skew
Jitter
F_O1
R_DSP11
V_OH1
V_OL1
I_OH1
I_OL1
t_r11
t_f11
d_t11
t_sk11
t_jcyc-cyc1
V_O = V_DD*(0.5)
I_OH = -1 mA
I_OL = 1 mA
V _OH@MIN = 1.0 V, V _OH@MAX = 3.135 V
V_{OL @MIN} = 1.95 V, V_{OL @MAX} = 0.4 V
V_OL = 0.4 V, V_OH = 2.4 V
V_OH = 2.4 V, V_OL = 0.4 V
V_T = 1.5 V
V_T = 1.5 V
V_T = 1.5 V 3V66
MIN TYP MAX UNITS
MHz
12
55
Ω
2.4
V
0.55 V
-33
-33 mA
30
38 mA
0.5 1.36 2
ns
0.5 1.37 2
ns
45 52.3 55
%
15 250 ps
201 250 ps
0721A—07/29/03
21