ICS9250-23 Datasheet, PDF (13/15 Pages) Integrated Circuit Systems – Frequency Generator & Integrated Buffers for Celeron & PII/III™

ICS9250-23
Electrical Characteristics - SDRAM
T_A = 0 - 70º C; V_DD = 3.3 V +/-5%, V_DDL = 2.5 V +/-5%; C_L =30 pF
PARAMETER
SYMBOL
CONDITIONS
Output High Voltage
Output Low Voltage
Output High Current
V_OH1
V_OL1
I_OH1
I_OH = -1 mA
I_OL = 1 mA
VOH_@MIN = 2 V
V_OH@MAX = 3.135V
Output Low Current
Rise Time¹
Fall Time¹
Duty Cycle¹
Skew
Jitter^1, _{Cycle-to-Cycle}
I_OL1
t_r1
t_f1
d_t1
t_sk1
t_jcyc-cyc1
VOL_@MIN = 1 V
V_OL@MAX =0.4V
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
1_{Guaranteed by design, not 100% tested in production.}
MIN TYP MAX UNITS
2.4 3.28
V
0.03 0.4
V
-46
-85
-12
-54
mA
54
63
27
53
mA
0.4 1.25 1.6
ns
0.4 1.53 1.6
ns
45 53.2 55
%
267 380 ps
176 250 ps
(No Skew Window is needed for Group Skew spec.)
T_A = 0 - 70º C; V_DD = 3.3 V +/-5%, V_DDL = 2.5 V +/-5%
24MHz, 48MHz, REF, CPU & IOAPIC load = 20 pF; PCI, SDRAM & 3V66 load = 30 pF.
Refer to Group Offset Waveform diagram for definition of transition edges.
Group Skews (CPU = 66 MHz; SDRAM = 100MHz)
PARAMETER
SYMBOL
CONDITIONS
MIN
CPU to SDRAM
CPU to 3V66
SDRAM to 3V66
3V66 to PCI
Skew¹
Skew¹
Skew¹
Skew¹
T_{sk1 CPU-SDRAM}
T_{sk1 CPU-3V66}
T_{sk1 SDRAM-3V66}
T_{sk1 3V66-PCI}
CPU @ 1.25 V, SDRAM @ 1.5 V
CPU @ 1.25 V, 3V66 @ 1.5 V
SDRAM @1.5V, 3V66 @ 1.5 V
3V66 @1.5V, PCI @ 1.5 V
2.0
7
-500
1.5
TYP MAX UNITS
3.0 ns
8
ns
394 500 ps
2.58 3.5 ns
Group Skews (CPU = 100 MHz; SDRAM = 100MHz)
PARAMETER
SYMBOL
CONDITIONS
MIN
CPU to SDRAM
CPU to 3V66
SDRAM to 3V66
3V66 to PCI
Skew¹
Skew¹
Skew¹
Skew¹
T_{sk1 CPU-SDRAM}
T_{sk1 CPU-3V66}
T_{sk1 SDRAM-3V66}
T_{sk1 3V66-PCI}
CPU @ 1.25 V, SDRAM @ 1.5 V
CPU @ 1.25 V, 3V66 @ 1.5 V
SDRAM @1.5V, 3V66 @ 1.5 V
3V66 @1.5V, PCI @ 1.5 V
4.5
4.5
-500
1.5
TYP MAX UNITS
5.5 ns
4.63 5.5 ns
396 500 ps
2.58 3.5 ns
Group Skews (CPU = 133 MHz; SDRAM = 100MHz)
PARAMETER
SYMBOL
CONDITIONS
MIN
CPU to SDRAM
CPU to 3V66
SDRAM to 3V66
3V66 to PCI
Skew¹
Skew¹
Skew¹
Skew¹
T_{sk1 CPU-SDRAM}
T_{sk1 CPU-3V66}
T_{sk1 SDRAM-3V66}
T_{sk1 3V66-PCI}
CPU @ 1.25 V, SDRAM @ 1.5 V
CPU @ 1.25 V, 3V66 @ 1.5 V
SDRAM @1.5V, 3V66 @ 1.5 V
3V66 @1.5V, PCI @ 1.5 V
-500
-500
-500
1.5
TYP MAX UNITS
-322 500 ps
-284 500 ps
389 500 ps
2.61 3.5 ns
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