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PDF ICS9147-22 Data sheet ( Hoja de datos )
| Número de pieza | ICS9147-22 | |
| Descripción | Pentium/ProTM System Clock Chip | |
| Fabricantes | Integrated Circuit Systems | |
| Logotipo |  |
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Integrated
Circuit
Systems, Inc.
ICS9147-22
Pentium/ProTM System and Cyrix Clock Chip
General Description
The ICS9147-22 is a Clock Synthesizer chip for Pentium
and PentiumPro plus Cyrix CPU based Desktop/Notebook
systems that will provide all necessary clock timing.
Features include four CPU, seven PCI and eight SDRAM
clocks. Two reference outputs are available equal to the
crystal frequency, plus the IOAPIC output powered by
VDDL. Additionally, the device meets the Pentium power-
up stabilization, which requires that CPU and PCI clocks
be stable within 2ms after power-up.
High drive PCICLK and SDRAM outputs typically provide
greater than 1 V/ns slew rate into 30 pF loads. CPUCLK
outputs typically provide better than 1V/ns slew rate into
20 pF loads while maintaining 50 ±5% duty cycle. The REF
clock outputs typically provide better than 0.5V/ns slew
rates.
Features
Generates system clocks for CPU, IOAPIC, SDRAM,
PCI, plus 14.318 MHz (REF0:1), USB, Super I/O
Supports single or dual processor systems
Supports Intel 60, 66.8MHz, Cyrix 55, 75MHz plus 83.3
and 68MHz (Turbo of 66.6) speeds.
Synchronous clocks skew matched to 250ps window on
CPU, SDRAM and 500ps window on PCI clocks
CPU clocks to PCI clocks skew 1-4ns (CPU early)
Two fixed outputs, 48MHz and 24 MHz
Separate 2.5V and 3.3V supply pins
- 2.5V or 3.3V output: CPU, IOAPIC
- 3.3V outputs: SDRAM, PCI, REF, 48/24 MHz
No power supply sequence requirements
48 pin 300 mil SSOP
The ICS9147-22 accepts a 14.318MHz reference crystal
or clock as its input and runs on a 3.3V supply.
Pin Configuration
Block Diagram
9147-22 Rev A 072597P
48-Pin SSOP
Power Groups
VDD1 = REF (0:1), X1, X2
VDD2 = PCICLK_F, PCICLK (0:5)
VDD3 = SDRAM (0:7),
VDD4 = 48MHz, 24MHz
VDDL = IOAPIC, CPUCLK (0:3)
Pentium is a trademark on Intel Corporation.
ICS reserves the right to make changes in the device data identified in this
publication without further notice. ICS advises its customers to obtain the latest
version of all device data to verify that any information being relied upon by the
customer is current and accurate.
1 page  
ICS9147-22
Absolute Maximum Ratings
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.0V
Logic Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND 0.5 V to VDD +0.5 V
Ambient OperatingTemperature . . . . . . . . . . . . 0°C to +70°C
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . 65°C to +150°C
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. These ratings are
stress specifications only and functional operation of the device at these or any other conditions above those listed in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods
may affect product reliability.
Electrical Characteristics at 3.3V
VDD = 3.0 3.7V, TA = 0 70° C unless otherwise stated
PARAMETER
SYMBOL
DC Characteristics
TEST CONDITIONS
Input Low Voltage
VIL Latched inputs and Fulltime inputs
Input High Voltage
VIH Latched inputs and Fulltime inputs
Input Low Current
IIL VIN = 0V (Fulltime inputs)
Input High Current
Output Low Current
Output High Current
Output Low Current
Output High Current
Output Low Voltage
Output High Voltage
Output Low Voltage
Output High Voltage
IIH
IOL1a
IOL1b
IOH1a
IOH1b
IOL2a
IOL2b
IOH2a
IOH2b
VOL1a
VOL1b
VOH1a
VOH1b
VOL2a
VOL2b
VOH2a
VOH2b
VIN=VDD (Fulltime inputs)
VOL = 0.8V; CPU, SDRAM, 48MHz;
VDDL = 3.3V
VOL = 0.8V; CPU; VDDL = 2.5V
VOH = 2.0V; CPU, SDRAM, 48MHz;
VDDL = 3.3V
VOH = 2.0V; CPU; VDDL = 2.5V
VOL = 0.8V; 24, PCI, REF, IOAPIC;
VDDL = 3.3V
VOL = 0.8V; IOAPIC;
VDDL = 2.5V
VOH = 2.0V for REF, PCI, 24MHz &
IOAPIC at VDDL = 3.3V
VOH = 2.0V; IOAPIC; VDDL = 2.5V
IOL = 10mA; CPU, SDRAM, 48MHz;
VDDL = 3.3V
IOL = 10mA; CPU; VDDL=2.5V
IOH = -10mA; CPU, SDRAM, 48MHz;
VDDL = 3.3V
IOH = -10mA; CPU; VDDL=2.5V
IOL = 10mA; for REF, PCI, 24MHz &
IOAPIC at VDDL = 3.3V
IOL = 10mA; IOAPIC;
VDDL = 2.5V
IOH = -10mA; for REF, PCI, 24MHz &
IOAPIC at VDDL = 3.3V
IOH = -10mA; IOAPIC; VDDL = 2.5V
Supply Current
IDD @66.6 MHz; all outputs unloaded
Supply Current
IDDPD Power Down
Note 1: Parameter is guaranteed by design and characterization. Not 100% tested in production.
MIN
-
0.7VDD
-28.0
-5.0
19.0
19.0
-
16.0
16.0
-
-
2.4
1.95
-
2.4
1.6
-
TYP
-
-
-10.5
-
30.0
30.0
-26.0
-12.5
25.0
25.0
-40.0
-13.0
0.3
0.3
2.8
2.1
0.3
0.3
2.8
2.1
120
300
MAX
0.2VDD
-
-
5.0
-
-16.0
-9.5
-
-14.0
-4.0
0.4
0.4
-
0.4
0.4
-
-
180
500
UNITS
V
V
µA
µA
mA
mA
mA
mA
mA
mA
mA
mA
V
V
V
V
V
V
V
V
mA
µA
5
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| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet ICS9147-22.PDF ] | |
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