Integrated
Circuit
Systems, Inc.
ICS9250-24
Integrated Buffers for PIII™
Recommended Application:
General purpose peripheral clk gen, also for IA64.
Output Features:
•
12 - PCI clocks @ 3V
•
2 - 48MHz clocks
•
6 - 3V66 66MHz reference output
•
2 - 14.318 reference output
Features:
•
Effective power management scheme through PD#
•
14.318MHz reference input
•
66MHz reference input
Key Specifications:
•
48MHz Output Jitter: <350ps
•
3V66 to PCI Skew: 1.5 to 3.5ns
•
PCI to PCI Skew: <500ps
•
3V66 to 3V66 Skew: <250ps
GND
14.318_IN
VDD
66_IN
GND
PCICLK0
PCICLK1
VDD
GND
PCICLK2
PCICLK3
VDD
GND
PCICLK4
PCICLK5
VDD
PCICLK6
PCICLK7
GND
VDD
PCICLK8
PCICLK9
GND
PCICLK10
PCICLK11
VDD
FS0
FS1
Pin Configuration
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
VDD
REF-1
REF-0
GND
VDD
3V66-5
3V66-4
GND
GND
3V66-3
3V66-2
VDD
VDD
3V66-1
3V66-0
GND
VDD
GND
AVDD
48MHz-1
48MHz-0
AGND
FS2
PD#
VDD
GND
SCLK
SDATA
56-Pin 300mil SSOP & TSSOP
Block Diagram
14.318_IN
PLL
2
Functionality
FS0
REF (1:0)
FS1
0
0
1
1
0
0
1
1
FS2
0
1
0
1
0
1
0
1
Description
All outputs on
PCI (7:0) off
PCI (5:0) off
All PCI off
Tristate
3V66-5 off
REF (1:0) off
48MHz-1 off
ICS9250-24
Details
All outputs on
Pins 18, 17, 15, 14, 11,
10, 7, 6 held LOW
Pins 15, 14, 11, 10, 7, 6
held LOW
All PCI outputs held LOW
All outputs high
impedance
Pin 51 held LOW
Pins 55, 54 held LOW
Pin 37 held LOW
0
0
2
48MHz (1:0)
0
Control
SDATA
SCLK
FS (2:0)
PD#
Logic
Config.
Reg.
0
1
1
1
3V66 (5:0)
PCICLK (11:0)
66_IN
/2
Delay
6
12
1
Power Groups
AGND = Analog ground
AVDD = Analog power
0390C—11/06/02
ICS9250-24
General Description
The
ICS9250-24
is a buffer chip, part of a two chip solution, with the ICS9248-109.
Pin Configuration
PIN NUMBER
1, 5, 9, 13, 19,
23, 31, 39, 41,
48, 49, 53
2
3, 8, 12, 16, 20,
26, 32, 40, 44,
45, 52, 56
4
25, 24, 22, 21,
18, 17, 15, 14,
11, 10, 7, 6
34, 28, 27
29
30
PIN NAME
GND
14.318_IN
VDD
66_IN
PCICLK (11:0)
FS (2:0)
SDATA
SCLK
TYPE
PWR
IN
PWR
IN
OUT
IN
I/O
IN
Ground pins
Input for 14.318MHz reference clock
3.3V power supply
Input for 3.3V 66MHz reference clock
PCI clock outputs.
Function select pins
Data pin for I
2
C circuitry, 5V tolerant input
Clock pin of I
2
C circuitry, 5V tolerant input
Asynchronous active low input pin used to power down
the device into a low power state. The internal clocks
are disabled and the VCO and the crystal are stopped.
The latency of the power down will not be greater than
3ms.
Analog ground
48MHz outputs
Analog power supply 3.3V
66MHz outputs
14.318MHz REF outputs
DESCRIPTION
33
PD#
IN
35
37, 36
38
51, 50, 47, 46,
43, 42
55, 54
AGND
48MHz (1:0)
AVDD
3V66 (5:0)
REF (1:0)
PWR
OUT
PWR
OUT
OUT
Group Offset Limits
Group
3V66 to PCI
Offset
1.5-3.5 ns 3V66 leads
Measurement Loads
(lumped)
30 pF
Measure Points
1.5V
0390C—11/06/02
2
ICS9250-24
Byte 0: Active/Inactive Register
(1= enable, 0 = disable)
Byte 1: Active/Inactive Register
(1= enable, 0 = disable)
BIT
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
PIN#
6
7
10
11
14
15
17
18
DW
1
1
1
1
1
1
1
1
DESCRIPTION
PCICLK0 (Act/Inactive)
PCICLK1 (Act/Inactive)
PCICLK2 (Act/Inactive)
PCICLK3 (Act/Inactive)
PCICLK4 (Act/Inactive)
PCICLK5 (Act/Inactive)
PCICLK6 (Act/Inactive)
PCICLK7 (Act/Inactive)
BIT
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
PIN#
21
22
24
25
36
37
54
55
DW
1
1
1
1
1
1
1
1
DESCRIPTION
PCICLK8 (Act/Inactive)
PCICLK9 (Act/Inactive)
PCICLK10 (Act/Inactive)
PCICLK11 (Act/Inactive)
48MHz-0 (Act/Inactive)
48MHz-1 (Act/Inactive)
14MHz-0 (Act/Inactive)
14MHz-1 (Act/Inactive)
Byte 2: Active/Inactive Register
(1= enable, 0 = disable)
Byte 3: Reserved , Active/Inactive Register
(1= enable, 0 = disable)
BIT
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
PIN#
42
43
46
47
50
51
-
-
DW
1
1
1
1
1
1
0
0
DESCRIPTION
3V66-0 (Act/Inactive)
3V66-1 (Act/Inactive)
3V66-2 (Act/Inactive)
3V66-3 (Act/Inactive)
3V66-4 (Act/Inactive)
3V66-5 (Act/Inactive)
R e s e r ve d
R e s e r ve d
BIT PIN#
Bit 7
-
Bit 6
-
Bit 5
-
Bit 4
-
Bit 3
-
Bit 2
-
Bit 1
-
Bit 0
-
DW
0
0
0
0
0
0
0
0
DESCRIPTION
R e s e r ve d
R e s e r ve d
R e s e r ve d
R e s e r ve d
R e s e r ve d
R e s e r ve d
R e s e r ve d
R e s e r ve d
Byte 4: Reserved, Active/Inactive Register
(1= enable, 0 = disable)
Byte 5: ICS Reserved Register
(1= enable, 0 = disable)
BIT PIN#
Bit 7
-
Bit 6
-
Bit 5
-
Bit 4
-
Bit 3
-
Bit 2
-
Bit 1
-
Bit 0
-
Notes:
DW
0
0
0
0
0
0
0
0
DESCRIPTION
R e s e r ve d
R e s e r ve d
R e s e r ve d
R e s e r ve d
R e s e r ve d
R e s e r ve d
R e s e r ve d
R e s e r ve d
BIT PIN#
Bit 7
-
Bit 6
-
Bit 5
-
Bit 4
-
Bit 3
-
Bit 2
-
Bit 1
-
Bit 0
-
DW
0
0
0
0
0
0
0
0
DESCRIPTION
R e s e r ve d
R e s e r ve d
R e s e r ve d
R e s e r ve d
R e s e r ve d
R e s e r ve d
R e s e r ve d
R e s e r ve d
1. Inactive means outputs are held LOW and are
disabled from switching.
2. DW - Default write values as in Intel Specification
stated.
0390C—11/06/02
Note: Don’t write into this register, writing into this
register can cause malfunction
3
ICS9250-24
Absolute Maximum Ratings
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . .
Logic Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ambient Operating Temperature . . . . . . . . . .
Case Temperature . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature . . . . . . . . . . . . . . . . . . . .
5.5 V
GND –0.5 V to V
DD
+0.5 V
0°C to +70°C
115°C
–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 - Input/Supply/Common Output Parameters
T
A
= 0 - 70°C; Supply Voltage V
DD
= 3.3 V +5%
PARAMETER
UNITS
SYMBOL
CONDITIONS
MIN
TYP
MAX
Input High Voltage
2
V
DD
+ 0.3
V
V
IH
Input Low Voltage
V
SS
- 0.3
0.8
V
V
IL
Input High Current
µ
A
V
IN
= V
DD
-5
5
I
IH
Input Low Current
µ
A
I
IL1
V
IN
= 0 V; Inputs with no pull-up resistors
-5
Input Low Current
µ
A
I
IL2
V
IN
= 0 V; Inputs with pull-up resistors
-200
Operating
mA
I
DD3.3OP
C
L
= 0 pF; Select @ 66M
100
Supply Current
Power Down
I
DD3.3PD
C
L
= 0 pF; With input address to Vdd or GND
600
µ
A
Supply Current
Input frequency
V
DD
= 3.3 V;
14.318
MHz
F
i
Pin Inductance
7
nH
L
pin
Logic Inputs
5
pF
C
IN
Input Capacitance
1
Out put pin capacitance
6
pF
C
out
1
Transition Time
T
trans
To 1st crossing of target Freq.
3
mS
1
Settling Time
T
s
From 1st crossing to 1% target Freq.
3
mS
1
Clk Stabilization
T
STAB
From V
DD
= 3.3 V to 1% target Freq.
3
mS
Delay
1
t
PZH
,t
PZH
t
PLZ
,t
PZH
output enable delay (all outputs)
output disable delay (all outputs)
1
1
10
10
nS
nS
Guaranteed by design, not 100% tested in production.
0390C—11/06/02
4
ICS9250-24
Electrical Characteristics - 48MHz
T
A
= 0 - 70°C; V
DD
= 3.3 V ± 5%; C
L
=10-20 pF (unless otherwise stated)
PARAMETER
Output Frequency
Output Impedance
Output High Voltage
Output Low Voltage
Output High Current
Output Low Current
Rise Time
Fall Time
Duty Cycle
Skew
Jitter
1
SYMBOL
F
O1
R
DSP11
V
OH1
V
OL1
I
OH1
I
OL1
t
r11
t
f11
d
t11
t
sk11
t
jcyc-cyc
CONDITIONS
V
O
= V
DD
*(0.5)
I
OH
= -1 mA
I
OL
= 1 mA
VOH@ MIN = 1.0 V, VOH@ MAX = 3.135 V
VOL@ MIN = 1.95 V, VOL@ MAX= 0.4
V
OL
= 0.4 V, V
OH
= 2.4 V
V
OH
= 2.4 V, V
OL
= 0.4 V
V
T
= 1.5 V
V
T
= 1.5 V
V
T
= 1.5 V
MIN
20
2.4
-29
29
1
1
45
TYP
MAX UNITS
MHz
60
0.4
-23
27
Ω
V
V
mA
mA
ns
ns
%
ps
ps
1.54
1.60
52.1
290
4
4
55
N/A
350
Guaranteed by design, not 100% tested in production.
REF
T
A
= 0 - 70°C; V
DD
= 3.3 V +/-5%; C
L
=10-20 pF (unless otherwise stated)
PARAMETER
Output Frequency
Output Impedance
Output High Voltage
Output Low Voltage
Output High Current
Output Low Current
Rise Time
Fall Time
Duty Cycle
Skew
1
Electrical Characteristics -
SYMBOL
F
O1
R
DSP11
V
OH1
V
OL1
I
OH1
I
OL1
t
r11
t
f11
d
t11
t
sk11
CONDITIONS
V
O
= V
DD
*(0.5)
I
OH
= -1 mA
I
OL
= 1 mA
VOH@ MIN = 1.0 V, VOH@ MAX = 3.135 V
VOL@ MIN = 1.95 V, VOL@ MAX= 0.4
V
OL
= 0.4 V, V
OH
= 2.4 V
V
OH
= 2.4 V, V
OL
= 0.4 V
V
T
= 1.5 V
V
T
= 1.5 V
MIN
20
2.4
-29
29
1
1
45
TYP
MAX UNITS
MHz
60
0.4
-23
27
Ω
V
V
mA
mA
ns
ns
%
ps
1.7
1.7
50.8
4
4
55
N/A
Guaranteed by design, not 100% tested in production.
0390C—11/06/02
5
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