ICS9248-199 Datasheet, PDF (12/21 Pages) Integrated Circuit Systems – Frequency Generator for SIS 735/740 with AMD K7 Processor

ICS9248-199
Electrical Characteristics - CPUCLK (Open Drain)
T_A = 0 - 70°C; V_DD=3.3V +/- 5%; C_L = 20 pF (unless otherwise specified)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP
MAX
UNITS
Output Impedance
Output High Voltage
Output Low Voltage
Output Low Current
Z_O1
V_O=V_X
50
V_OH2B Termination to Vpull-up(external)
1
V_OL2B Termination to Vpull-up(external)
I_OL2B
V_OL = 0.3 V
18
Ω
1.2
V
0.4
V
mA
Fall Time¹
Differential voltage-AC¹
Differential voltage-DC¹
Diff Crossover Voltage¹
t_f2B1
V_OH = 1.1V, V_OL = 2.0V
V_OH = 80% V_DD, V_OL = 20% V_DD
V_DIF
Note 2
V_DIF
Note 2
V_X
Note 3
1.7
2
ns
1.1
1.2
0.4
Vpull-up(ext) + 0.6 V
0.2
Vpull-up(ext) + 0.6 V
1.2 1.45
1.6
V
Duty Cycle¹
d_t2B1
CPUT0,C0 between crossing poin 45
CPUT0,C0 V_T = 50% V_DD
44
53
47
55
55
%
Skew CPUCLK to CPUT0¹
t_sk2B1
V_T = 50%
40
175
ps
Jitter, Cycle-to-cycle¹ tjcyc-cyc_2B1 V_T = V_X
105
250
ps
Jitter, Absolute¹
tjabs_2B1 V_T = 50%
-250
250
ps
Notes:
1 - Guaranteed by design, not 100% tested in production.
2 - V_DIF specifies the minimum input differential voltages (V_TR-V_CP) required for switching, where V_TR is the "true" input level
and V_CP is the "complement" input level.
3 - Vpull-up(external) = 2.7V, Min=Vpull-up(external)/2-150mV; Max=Vpull-up(external)/2 +150mV
Electrical Characteristics - 24MHz, 48MHz, AGP, REF
T_A = 0 - 70°C; V_DD = 3.3V +/-5%; C_L = 20 pF (unless otherwise specified)
PARAMETER
Output Impedance¹
Output Impedance¹
SYMBOL
R_DSP5B
R_DSN5B
CONDITIONS
V_O=V_DD*(0.5)
V_O=V_DD*(0.5)
Output High Voltage
V_OH5 I_OH = -14 mA
Output Low Voltage
Output High Current
Output Low Current
Rise Time¹
Fall Time¹
V_OL5
I_OH5
I_OL5
t_r51
t_f51
I_OL = 6 mA
V_OH = 2.0 V
V_OL = 0.8 V
V_OL = 0.4 V, V_OH = 2.4 V
V_OH = 2.4 V, V_OL = 0.4 V
Duty Cycle¹
Skew AGP to AGP¹
d_t51
V_T = 1.5 V
V_T = 1.5 V
t_sk51
V_T = 1.5 V
24_48 MHz, AGP
REF
AGP
V_T = 1.5 V
Jitter, Cycle-to-Cycle¹
t_{jcyc-cyc51 VT = 1.5 V}
V_T = 1.5 V
1_{Guaranteed by design, not 100% tested in production.}
24_48 MHz
AGP
REF
0376E—12/23/02
12
MIN TYP MAX UNITS
20
60
Ω
20
60
Ω
2.4
V
0.4 V
-20 mA
10
mA
1.3
2
ns
1.3
2
ns
45
52
55
%
45
55
56
100 175 ps
110 500
220
ps
375 500