9134-06 9134-07 RevC111695
Integrated
Circuit
Systems, Inc.
ICS9134-06
ICS9134-07
Advance Information
32 kHz Motherboard Frequency Generator
Block Diagram
VDD32
14.318 MHz
Peripheral
Clocks
CPUCLK
32.768 kHz
32.768 kHz
crystal
Reference
Clock
Clock
Generator
1
Clock
Generator
2
Clock
Generator
3
General Description
The ICS9134-06 and ICS9134-07 are designed to generate
clocks for all 286, 386, 486, Pentium and RISC-based mother-
boards, including laptops and notebook computers. The only
external components required are a 32.768 kHz crystal and
decoupling capacitors. The device generates the 14.318 MHz
system clock, eliminating the need for a 14.318 MHz crystal.
High performance applications may require high speed clock
termination components. The chip includes three independent
clock generators plus the 32.768 kHz reference clock to pro-
duce all necessary frequencies, including real time
clock/DRAM refresh, master clock, CPU clock, keyboard
clock, floppy disk controller clock, serial communications
clock and bus clocks. Different frequencies from clocks #2 can
be selected using the frequency select pins, but clock #1 will
be at 14.318 MHz for all standard versions.
VDD32 Supply
The ICS9134-06 and ICS9134-07 have a separate power sup-
ply for the 32.768 kHz oscillator circuitry. This allows the
32 kHz clock to run from a battery or other source while the
main power to the chip is disconnected. The VDD32 supply is
guaranteed to operate down to +2.0V, with the clock consuming
less than 10
A at +3.3V with the main VDD at 0V.
The frequencies and power-down options in the ICS9134-06
and ICS9134-07 are mask programmable. Customer specific
masks can be made and prototypes delivered within 6-8 weeks
from receipt of order. Integrated Circuit Systems also offers
standard versions, such as that described in this data sheet.
Applications
Notebook/Palmtop Computers: The ICS9134-06 and
ICS9134-07 work with +3.3V and +5V and a single
32.768 kHz crystal, making it the ideal solution for generating
clocks in portables with minimum board space. The user can
save power by using this single part instead of oscillators or
other frequency generators. The ICS9134-06 and ICS9134-07
further reduce the current consumption by having the ability to
completely shut down the individual clocks when not in use, while
still maintaining the separately powered 32.768 kHz clock.
Features
I
DD
<10
A when 32 kHz is running on VDD32
Single 32.768 kHz crystal generates all PC motherboard
clocks
3 independent clock generators
Generates CPU clocks from 4.0 to 80 MHz
Up to 5 output clocks
Separate VDD for 32 kHz clock
Power-down options available
Operates from 3.3V or 5.0V supply
Operates up to 66 MHz at 3.3V
Supports OPTi 80C463/5 and Fir
TM
TM
chipsets
16-pin, 300-mil, SOIC package
Fir is a trademark of Picopower Corporation.
Pin Configuration
Pin Descriptions
PIN
NUMBER
PIN
NAME
TYPE
DESCRIPTION
1
CPUS2
I
Select 2 for 2XCPU and CPU frequencies. See Table above.
2
X2
O
Crystal connection. Connect to 32.768 kHz crystal. Includes internal
XTAL load capacitance.
3
X1
I
Crystal connection. Connect to 32.768 kHz crystal. This pin includes
internal XTAL load capacitance and feedback bias for a 32.768 kHz crystal.
4
VDD32
P
Separate power supply connection for 32.768 kHz clock. Will operate down to
2.0V, independent of the rest of the circuit VDD.
5
VDD
P
Connect to +3.3V or +5V.
6
GND
P
Connect to ground.
7
24M
O
24 MHz floppy (or super I/O) clock output.
8
32K
O
32.768 kHz square wave clock output.
9
KBOUT
O
Keyboard clock output, fixed 16 MHz (-06) or 12 MHz (-07).
10
PD24+KBD
I
Power-down 24M+keyboard. Shuts off both clock outputs, pins 7 & 9 when
low.
11
14.3M
O
14.318 MHz system clock output.
12
GND
P
Connect to ground.
13
VDD
P
Connect to +3.3V or +5V.
14
CPUCLK
O
CPUCLK output. See Table above.
15
CPUS0
I
Select 0 for 2XCPU and CPU frequencies. See Table above.
16
CPUS1
I
Select 1 for 2XCPU and CPU frequencies. See Table above.
CPUS2
1
16
CPUS1
X2
2
15
CPUS0
X1
3
14
CPUCLK
VDD32
4
13
VDD
VDD
5
12
GND
GND
6
11
14.3M
24M
7
10
PD24+KDB
32K
8
9
KBOUT
I
C
S
9
134-
06
I
C
S
9
134-
07
16-Pin SOIC
Decoding Table for CPU Clock
CPUS2
CPUS1
CPUS0
CPUCLK (MHz)
0
0
0
Off+14M off
0
0
1
80.00
0
1
0
25.00
0
1
1
66.66
1
0
0
20.00
1
0
1
50.00
1
1
0
33.33
1
1
1
4.00
ICS9134 Option
KEYBOARD CLOCK
-06
-07
KBOUT
16 MHz
12 MHz
ICS9134-06
ICS9134-07
2
Absolute Maximum Ratings
VDD referenced to GND . . . . . . . . . . . . . . . . . . . . . . 7V
Operating temperature under bias. . . . . . . . . . . . . . . . 0
C to 70
C
Storage temperature . . . . . . . . . . . . . . . . . . . . . . . . . . -40
C to +150
C
Voltage on I/O pins referenced to GND. . . . . . . . . . . GND -0.5V to VDD +0.5V
Power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 Watts
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions above those indicated 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
V
DD
= +3.0 to 3.7V, T
A
=0
C to 70
C unless otherwise stated
DC Characteristics
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Input Low Voltage
V
IL
-
-
0.2V
DD
V
Input High Voltage
V
IH
0.7V
DD
-
-
V
Input Low Current
I
IL
V
IN
=0V
-15
-7
-
A
Input High Current
I
IH
V
IN
=V
DD
-2
-
2
A
Output Low Voltage
1
V
OL
I
OL
=6mA
-
-
0.1
V
Output High Voltage
1
V
OH
I
OH
=-4mA
0.85V
DD
0.9V
DD
-
V
Output Low Current
1
I
OL
V
OL
=0.2V
DD
15
24
-
mA
Output High Current
1
I
OH
V
OH
=0.7V
DD
-
-13
-8
mA
Supply Current
I
DD
No load @ 33 MHz
-
9
17
mA
Supply Current
I
DD
No load @ 66.6 MHz
-
12
24
mA
V
DD
32 Supply Current
I
DD
32
No load, V
DD
32=3.7V
-
4.6
12
A
V
DD
32 Supply Voltage
V
DD
32
V
DD
=0 to 3.7V, 32 kHz
output operating
2.0
-
-
V
Pull-up Resistor Value
1
R
pu
370
530
650
k ohm
AC Characteristics
Rise Time
1
t
r
15pF load, 0.8 to 2.0V
-
1.5
2
ns
Fall Time
1
t
f
15pF load, 2.0 to 0.8V
-
1.5
2
ns
Rise Time
1
t
r
15pF load, 20% to 80%
2
2.5
3.5
ns
Fall Time
1
t
f
15pF load, 80% to 20%
2
2.5
3.5
ns
Duty Cycle
1
d
t
15pF load
40
50
55
%
Jitter, One Sigma
1
t
jis
As compared with
clock period.
-
1
2
%
Jitter, Absolute
1
t
jab
-
2
5.5
%
Input Frequency
1
f
i
25
32.768
40
kHz
Power-up Time
1
t
pu
Off to 33.3 MHz
-
4
8
ms
Transition Time
1
t
ft
4 to 66.6 MHz
-
-
4.8
ms
Note:
1.
Parameter guaranteed by design and characterization. Not 100% tested in production.
ICS9134-06
ICS9134-07
3
Typical 32 kHz Supply Current
0.1
F
0.1
F
0.1
F
2.2
F
(Note 3)
VDD
VDD
ICS
9
1
34-
06
ICS
9
1
34-
07
Notes:
1)
The external components shown should be
placed as close to the device as possible.
2)
Pins 5 and 13 should be connected together
externally. One decoupling capacitor may
suffice for both pins.
3)
May be part of system decoupling.
32.768 kHz
crystal
Recommended External Circuit
ICS9134-06
ICS9134-07
5
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