cy2278a Cypress Semiconductor Corporation., cy2278a Datasheet - Page 4

• Manufacturer Part Number: cy2278a
• Description: Pentium Clock Synthesizer/driver Mobile With Intel 82430tx Sdram
• Manufacturer: Cypress Semiconductor Corporation.

Actual Clock Frequency Values
Maximum Ratings
(Above which the useful life may be impaired. For user guide-
lines, not tested.)
Supply Voltage ..................................................–0.5 to +7.0V
Input Voltage .............................................. –0.5V to V
Operating Conditions
Electrical Characteristics
V
V
V
V
V
T
C
f
Notes:
Parameter
CPUCLK(0,0,0)
CPUCLK(0,0,1)
CPUCLK(0,1,0)
CPUCLK(0,1,1)
CPUCLK(1,0,0)
CPUCLK(1,0,1)
CPUCLK(1,1,0)
CPUCLK(1,1,1)
USBCLK
CLK8MHz
AV
(REF)
4.
5.
A
OH
OL
IH
IL
DDCPU,
L
Parameter
DD
Meets Intel USB clock requirements.
Electrical parameters are guaranteed with these operating conditions.
, V
DDQ3
V
Clock Output
[4]
DDQ2
High-level Input Voltage
Low-level Input Voltage
High-level Output Voltage V
Low-level Output Voltage V
Analog and Digital Supply Voltage
CPU and IOAPIC Supply Voltage
Operating Temperature, Ambient
Max. Capacitive Load on
Reference Frequency, Oscillator Nominal Value
Description
XCPUCLK, CPUCLK, USBCLK/IRCLK, CLK8MHZ, REF1,
IOAPIC
PCICLK
REF0
[5]
75.0 MHz
20.0 MHz
25 MHz
33.33 MHz
50.0 MHz
60.0 MHz
66.67 MHz
40.0 MHz
48.0
8.0
Except Crystal Inputs
Except Crystal Inputs
DDCPU
DDCPU
Target Frequency
Description
, V
, V
(MHz)
DDQ2
DDQ2
DD
+0.5
= 2.375V
= 2.375V
[6]
[6]
4
Test Conditions
Storage Temperature (Non-Condensing) ... –65 C to +150 C
Max. Soldering Temperature (10 sec) ...................... +260 C
Junction Temperature ............................................... +150 C
Package Power Dissipation .............................................. 1W
Static Discharge Voltage ........................................... >2000V
(per MIL-STD-883, Method 3015, like V
75.0
19.979
24.974
33.298
49.947
60.0
66.654
39.992
48.008
8.001
Actual Frequency
I
I
I
I
OH
OH
OL
OL
(MHz)
= 13 mA XCPUCLK
= 18 mA IOAPIC
= 9 mA
= 13 mA IOAPIC
14.318
3.135
2.375
Min.
XCPUCLK
0
0
–1057
–1057
–1107
–1057
0
–171
–196
167
167
DD
14.318
3.465
2.625
Max.
70
20
20
30
45
pins tied together)
Min. Max. Unit
2.0
2.0
CY2278A
PPM
0.8
0.4
MHz
Unit
pF
V
V
C
V
V
V
V