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参数资料
| 型号： | C9801CY |
| 英文描述： | Hex buffer |
| 中文描述： | CPU系统时钟发生器|的CMOS | SSOP封装| 56PIN |塑料 |
| 文件页数： | 7/11页 |
| 文件大小： | 100K |
| 代理商： | C9801CY |
Low EMI Clock Generator for Pentium II CPU Systems
with Power Management
Cypress Semiconductor Corporation
525 Los Coches St.
Milpitas, CA 95035. Tel: 408-263-6300, Fax: 408-263-6571
http://www.cypress.com
Document#: 38-07049 Rev. **
05/03/2001
Page 7 of 11
APPROVED PRODUCT
C9801
AC Parameters
Characteristic
Output Duty Cycle
Symbol
Min
45
Typ
50
Max
Units
Conditions
Measured at 1.5V for 3.3 Volt VDD
clocks and 1.25V for 2.5V VDD clocks
-
55
%
SKEW PERFORMANCE
-
-
-
CPU to CPU Skew
CPU/2 to CPU/2 Skew
IOAPIC to IOAPIC Skew
tSKEW
cc
tSKEW
cc2
tSKEW
II
0
0
0
175
175
250
pS
pS
pS
CPU load = 20 pF, measured at 1.25V
CPU/2 load 20 pF, measured at 1.25V
IOAPIC load = 20 pF, measured at
1.25V
3V66 load = 30 pF, measured at 1.5V
PCI load = 30 pF measured at 1.5V
3V66 to 3V66 Skew
PCI to PCI Skew
tSKEW
AA
tSKEW
PP
0
0
-
-
250
500
pS
pS
CLOCK OFFSETS
-
CPU to 3V66 Offset
tOFF
CA
0
1.5
nS
CPU load = 20 pF, 3V66 load = 30 pF
measured at 1.25V, 3V66 = 1.5V
(CPU leads)
3V66 load = 30 pF, PCI load = 30 pF
measured at 1.5V
CPU load = 20 pF, IOAPIC load = 20
pF measured at 1.25V (CPU leads)
3V66 to PCI Offset
tOFF
CP
1.5
-
4.0
nS
CPU to IOAPIC Offset
tOFF
CL
1.5
-
4.0
nS
JITTER PERFORMANCE
-
Period Adjacent Cycles
CPU, CPU/2 and IOAPIC
Period Adjacent Cycles
48M, 3V66, PCI and REF
P
-
+250
pS
Measured at 1.25 volts, 20 pF load
P
-
-
+ 500
pS
Measured at 1.50 volts, 3V66 at 30 pF
load, all others at 20 pF load
VDD = VDDP = VDDF =VDDR =3.3V
±
5
%, VDDC, & VDDI = 2.5V
±
5
%, TA = 0
°
C to +70
°
C
Buffer Characteristics for IOAPIC (0:2), and CPU/2 (0,1)
Characteristic
Pull-Up Current Min
Pull-Up Current Max
Pull-Down Current Min
Pull-Down Current Max
Rise Time Min
Between 0.4 V and 2.0 V
Fall Time Max
Between 0.4 V and 2.0 V
Dynamic Output Impedance
Symbol
IOH
min
IOH
max
IOL
min
IOL
max
TR
min
Min
-27
Typ
Max
Units
mA
mA
mA
mA
Conditions
-
-
-
-
-
-
Vout = VDD/2
Vout = VDD – 0.5V
Vout = VDD/2
Vout = 0.4 V
20 pF Load
-
-13.6
-
11.8
1.6
27.7
-
0.4
nS
TRF
max
0.4
-
1.6
nS
20 pF Load
Z
O
-
Ohms
VDD = VDDP = VDDF =VDDR =3.3V
±
5
%, VDDC, & VDDI =2.5V
±
5
%, TA = 0
°
C to +70
°
C
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