4
Integrated
Circuit
Systems, Inc.
ICS932S421C
1460E—08/25/09
The ICS932S421C is a main clock synthesizer for CK410B+ generation Intel server platforms. The ICS932S421C is driven
with a 14.318MHz crystal. It generates CPU outputs up to 400MHz and PCI-Express clocks at 100 or 200 MHz. The 48 MHz
USB clock is an exact 48.000 MHz clock.
General Description
Block Diagram
Power Groups
VDD GND
53 50 Xtal, Ref
1,8 2,7 PCICLK outputs
15,25,28 20 SRCCLK outputs
35 34 Master clock, CPU Analog
12 14 48MHz, PLL_48
47,44,38 41 CPUCLK clocks
Description
Pin Number
CPU PLL
CONTROL
LOGIC
XTAL
OSC.
CPUCLK(3:0)
FIXED PLL
48MHz
DIVIDER
DIVIDERS
REF(1:0)
SRCCLK(4:0)
S DATA
SCLK
X1
X2
IREF
FS(C:A)
VTT_PWRGD#/PD
SRC/PCI
PLL
DIVIDERS
TEST_SEL
PCICLK(3:0), PCICLK_F(2:0)
5
Integrated
Circuit
Systems, Inc.
ICS932S421C
1460E—08/25/09
Single-ended Output Terminations
Test Load
CL=5pF
Rs
Zo
ICS932S421C
SEPP Output Buffer
(Single Ended
Push Pull)
Rs
Zo
Rs
Zo
SEPP Output Buffer
(Single Ended
Push Pull)
CL=5pF
CL=5pF
The singled-ended outputs of the ICS 932S421C default to a drive strength of 2
loads. The REF clocks can be turned down to 1-load strength via the SMBus.
Suggested termination resistors are as follows for transmission lines with Zo =
50 ohms:
Driving 1 load, Rs = 33 ohms
Driving 2 loads, Rs = 7.5 ohms
Single-ended outputs at 1-load strength (REF clock only) Driving 1 load, Rs = 22 ohms
Single-ended outputs at 2-load strength (Power up default
for all single-ended outputs)
6
Integrated
Circuit
Systems, Inc.
ICS932S421C
1460E—08/25/09
Absolute Maximum Rating
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Notes
3.3V Core Supply Voltage VDD_A
-
V
DD
+ 0.5V V
1
3.3V Logic Input Supply
Voltage
VDD_In
-
GND - 0.5 V
DD
+ 0.5V V
1
Storage Temperature Ts
-
-65 150
°
C
1
Ambient Operating Temp Tambient
-
070°C
1
Case Temperature Tcase
-
115 °C
1
Input ESD protection HBM ESD prot
-
2000 V
1
1
Guaranteed by design and characterization, not 100% tested in production.
Electrical Characteristics - Input/Supply/Common Output Parameters
PARAMETER SYMBOL CONDITIONS* MIN TYP MAX UNITS Notes
Input High Voltage V
IH
3.3 V +/-5% 2 V
DD
+ 0.3 V 1
Input Low Voltage V
IL
3.3 V +/-5% V
SS
- 0.3 0.8 V 1
Input High Current I
IH
V
IN
= V
DD
-5 5 uA 1
I
IL1
V
IN
= 0 V; Inputs with no pull-up
resistors
-5 uA 1
I
IL2
V
IN
= 0 V; Inputs with pull-up
resistors
-200 uA 1
Low Threshold Input-
High Voltage
V
IH_FS
3.3 V +/-5% 0.7 V
DD
+ 0.3 V 1
Low Threshold Input-
Low Voltage
V
IL_FS
3.3 V +/-5% V
SS
- 0.3 0.35 V 1
Operating Supply Current I
DD3.3OP
Full Active, C
L
= Full load; 350 mA 1
all diff pairs driven 70 mA 1
all differential pairs tri-stated 12 mA 1
Input Frequency F
i
V
DD
= 3.3 V 14.31818 MHz 2
Pin Inductance L
p
in
7nH1
C
IN
Logic Inputs 5 pF 1
C
OU
T
Output pin capacitance 6 pF 1
C
INX
X1 & X2 pins 5 pF 1
Clk Stabilization T
STAB
From VDD Power-Up or de-
assertion of PD to 1st clock
1.8 ms 1
Modulation Frequency Triangular Modulation 30 33 kHz 1
Tdrive_PD
CPU output enable after
PD de-assertion
300 us 1
Tfall_PD PD fall time of 5 ns 1
Trise_PD PD rise time of 5 ns 1
SMBus Voltage V
D
D
2.7 5.5 V 1
Low-level Output Voltage V
OL
@ I
PULLUP
0.4 V 1
Current sinking at
V
OL
= 0.4 V
I
PULLUP
4mA1
SCLK/SDATA
Clock/Data Rise Time
T
RI 2C
(Max VIL - 0.15) to
(Min VIH + 0.15)
1000 ns 1
SCLK/SDATA
Clock/Data Fall Time
T
FI2C
(Min VIH + 0.15) to
(Max VIL - 0.15)
300 ns 1
*TA = 0 - 70°C; Supply Voltage VDD = 3.3 V +/-5%
1
Guaranteed by design and characterization, not 100% tested in production.
2
Input frequency should be measured at the REF pin and tuned to ideal 14.31818MHz to meet ppm frequency accuracy on PLL outputs.
Input Low Current
Powerdown Current I
DD3. 3PD
Input Capacitance

932S421CFLF

Mfr. #:
Manufacturer:
Description:
Clock Synthesizer / Jitter Cleaner SERVER MAIN CLOCK - CK410B
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

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