APPROVED PRODUCT
C9812
Low EMI Clock Generator for Intel 810E Chipset Systems
Switching Characteristics
Characteristic
Symbol
Min
Typ
Max
55
Units
%
Conditions
Output Duty Cycle
CPU to SDRAM
CPU to 3V66
-
45
50
-
Note 6
TPD1
TPD2
TPD3
tPD
-
500
500
500
-
pS
pS
pS
nS
nS
pS
pS
pS
pS
pS
pS
pS
CPU = 133.3MHz, Notes 6, 7
CPU = 133.3MHz, Notes 6, 7
CPU = 66.6/100/133.3MHz Notes 6, 7
CPU = 66.6/100/133.3MHz Notes 6, 7
CPU = 66.6/100/133.3MHz Notes 6, 7
see Notes 6, 7
-
-
SDRAM to 3V66
3V66 to PCI
-
-
1.5
-
PCI to IOAPIC
tPD
-
-
-
-
-
-
-
-
0
-
1
Skew (CPU0-CPU1)
Skew (SDRAM-SDRAM)
Skew (APIC-APIC)
Skew (3V66-3V66)
Skew (PCI – PCI)
Cycle to Cycle Jitter
Cycle to Cycle Jitter
tSKEW1
tSKEW2
tSKEW3
tSKEW4
TSKEW5
∆P1
175
250
250
175
500
250
500
-
see Notes 6, 7
-
-
-
-
CPU, and SDRAM, Notes 6 & 7
-
IOAPIC, USB, DOT, 3V66, PCI,
Notes 6, 7
∆P2
Cycle to Cycle Jitter
-
-
1,000
pS
REF, Notes 6& 7
∆P3
VDD=VDDS=3.3V ±5%, VDDC=VDDI=2.5±5%, TA=0 to 70ºC
Note 6: All outputs loaded as per table 5 below. Probes are placed on the pins and taken at 1.5V levels for 3.3V signals and at 1.25V for 2.5V
signals.
Note 7: This measurement is applicable with Spread Spectrum ON or OFF.
Output Buffer Characteristics
Buffer Characteristics for CPU
Characteristic
Symbol
IOH1
IOH2
IOL1
IOL1
Z0
Min
-28
-26
12
Typ
-61
-58
24
Max
-107
Units
mA
Conditions
Vout =VDDC - 0.4V
Pull-Up Current
Pull-Up Current
-101
40
mA
Vout = 1.2 V
Vout = 0.4 V
Vout = 1.2 V
Pull-Down Current
Pull-Down Current
Dynamic Output Impedance
mA
27
56
93
mA
13.5
0.4
45
Ω
Rise Time Min
Between 0.4 and 2.0 V
Fall Time Max
Tr
-
-
1.6
nS
20pF Load
20pF Load
Tf
0.4
1.6
nS
Between 0.4 and 2.0 V
Cypress Semiconductor Corporation
525 Los Coches St.
Milpitas, CA 95035. Tel: 408-263-6300, Fax: 408-263-6571
http://www.cypress.com
Document#: 38-07053 Rev. **
05/03/01
Page 12 of 18
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