ICS9248-134 Datasheet, PDF (6/13 Pages) Integrated Circuit Systems – Frequency Timing Generator for PENTIUM II/III Systems

ICS9248-134
Group Offset
T_A = 0 - 70º C; V_DD = 3.3 V +/-5%, V_DDL = 2.5 V +/-5%; C_L = 20 pF (unless otherwise stated)
GROUP
OFFSET
MEASUREMENT LOADS
MEASURE POINTS
CPU to 3V66
0.0-1.5 ns; CPU leads. CPU @ 20pF, 3V66 @ 30pF
CPU @ 1.25V, 3V66 @ 1.5V
3V66 to PCI
0.5-4.0 ns; 3V66 leads.
3V66 @ 30pF, PCI @ 30pF
3V66 @ 1.5V, PCI @ 1.5V
CPU to IOAPIC
0.5-4.0 ns; CPU leads. CPU @ 20pF, IOAPIC @ 20pF CPU @ 1.25V, IOAPIC @ 1.25V
CPU to PCI
0.5-4.0 ns; CPU leads.
CPU @ 20pF, PCI @ 30pF
CPU @ 1.25V, PCI @ 1.5V
1_{Guaranteed by design, not 100% tested in production.}
Electrical Characteristics - CPUCLK
T_A = 0 - 70º C; V_DD = 3.3 V +/-5%, V_DDL = 2.5 V +/-5%; C_L = 20 pF (unless otherwise stated)
PARAMETER SYMBOL
CONDITIONS
MIN
Output Impedance¹
R_DSP2B V_O = V_DD*(0.5)
13.5
Output Impedance¹
R_DSN2B V_O = V_DD*(0.5)
13.5
Output High Voltage V_OH2B I_OH = -12.0 mA
2
Output Low Voltage
V_OL2B I_OL = 12.0 mA
Output High Current
I_OH2B V_OH = 1.7 V
Output Low Current
I_OL2B V_OL = 0.7 V
19
Rise Time¹
t_r2B
V_OL = 0.4 V, V_OH = 2.0 V
Fall Time¹
t_f2B
V_OH = 2.0 V, V_OL = 0.4 V
Duty Cycle¹
Skew¹
d_t2B V_T = 1.25 V; CPU frequencies < 135 MHz
45
t_sk2B V_T = 1.25 V
Jitter, Cycle-to-cycle¹
t_jcyc-cyc2B
V_T = 1.25 V; CPU frequencies <135 MHz
V_T = 1.25 V; CPU frequencies >=135 MHz
1_{Guaranteed by design, not 100% tested in production.}
TYP
30
32
2.24
0.31
-31
25
1.1
1.4
50
53
179
231
MAX UNITS
45
Ω
45
Ω
V
0.4
V
-19 mA
mA
1.6
ns
1.8
ns
55
%
175 ps
275
ps
350
Electrical Characteristics - CPU/2
T_A = 0 - 70º C; V_DD = 3.3 V +/-5%, V_DDL = 2.5 V +/-5%; C_L = 20 pF (unless otherwise stated)
PARAMETER
SYMBOL
CONDITIONS
MIN
Output Impedance¹
R_DSP2B V_O = V_DD*(0.5)
13.5
Output Impedance¹
R_DSN2B V_O = V_DD*(0.5)
13.5
Output High Voltage
V_OH2B I_OH = -12.0 mA
2
Output Low Voltage
V_OL2B I_OL = 12.0 mA
Output High Current
I_OH2B
V_OH = 1.7 V
Output Low Current
I_OL2B
V_OL = 0.7 V
19
Rise Time¹
t_r2B
V_OL = 0.4 V, V_OH = 2.0 V
Fall Time¹
t_f2B
V_OH = 2.0 V, V_OL = 0.4 V
Duty Cycle¹
d_t2B
V_T = 1.25 V
45
Jitter, Cycle-to-cycle¹
t_jcyc-cyc2B
V_T = 1.25 V; CPU frequencies <135 MHz
V_T = 1.25 V; CPU frequencies >=135 MHz
1_{Guaranteed by design, not 100% tested in production.}
TYP MAX UNITS
30
45
Ω
31
45
Ω
2.2
V
0.31 0.4
V
-31 -19 mA
26
mA
1.1 1.6 ns
1.1 1.6 ns
49
55
%
227 275
ps
306 350
6