DATASHEET
954206B FEBRUARY 22, 2016 1 ©2016 Integrated Device Technology, Inc.
Programmable Timing Control Hub™ for
Mobile P4™ Systems
954206B
General Description
The 954206B is a CK410M Compliant clock synthesizer.
954206B provides a single-chip solution for mobile systems
built with Intel P4-M processors and Intel mobile chipsets.
954206B is driven with a 14.318MHz crystal and generates
CPU outputs up to 400MHz. It provides the tight ppm accuracy
required by Serial ATA and PCI Express.
Recommended Application
CK410M Compliant Main Clock
Output Features
2 - 0.7V current-mode differential CPU pairs
4 - 0.7V current-mode differential PCI Express*pairs
1 - 0.7V current-mode differential CPU/PCI Express
selectable pair
1 - 0.7V current-mode differential SATA pair
1 - 0.7V current-mode differential LCDCLK/PCI Express
selectable pair
1 - 0.7V current-mode differential PCI Express/Clock
Request pair
4 - PCI (33MHz)
2 - PCICLK_F, (33MHz) free-running
1 - USB, 48MHz
1 - DOT, 96MHz, 0.7V current differential pair
2 - REF, 14.318MHz
Features/Benefits
Supports tight ppm accuracy clocks for Serial-ATA and
PCI Express
Supports programmable spread percentage and frequency
Uses external 14.318MHz crystal, external crystal load
caps are required for frequency tuning
Supports undriven differential CPU, PCI Express pair in PD
for power management.
PEREQ# pins to support PCI Express and SATA power
management.
Key Specifications
CPU outputs cycle-cycle jitter < 85ps
PCI Express outputs cycle-cycle jitter < 125ps
SATA outputs cycle-cycle jitter < 125ps
PCI outputs cycle-cycle jitter < 500ps
± 300ppm frequency accuracy on CPU, PCI Express and
SATA clocks
± 100ppm frequency accuracy on USB clocks
Pin Assignment
VDDPCI 1 56 PCICLK2/REQ_SEL**
GND 2 55 PCI/SRC_STOP#
PCICLK3 3 54 CPU_STOP#
PCICLK4 4 53 REF1/FS
L
C/TEST_SEL
PCICLK5 5 52 REF0
GND 6 51 GND
VDDPCI 7 50 X1
ITP_EN/PCICLK_F0 8 49 X2
*SELPCIEX_LCDCLK#/PCICLK_F1 9 48 VDDREF
Vtt_PwrGd#/PD 10 47 SDATA
VDD4811 46SCLK
FS
L
A/USB_48MHz 12 45 GND
GND 13 44 CPUCLKT0
DOTT_96MHz 14 43 CPUCLKC0
DOTC_96MHz 15 42 VDDCPU
FS
L
B/TEST_MODE 16 41 CPUCLKT1
LCDCLK_SS/PCIEX0T 17 40 CPUCLKC1
LCDCLK_SS/PCIEX0C 18 39 IREF
PCIEXT1 19 38 GNDA
PCIEXC1 20 37 VDDA
VDDPCIEX 21 36 CPUCLKT2_ITP/PCIEXT6
PCIEXT2 22 35 CPUCLKC2_ITP/PCIEXC6
PCIEXC2 23 34 VDDPCIEX
PCIEXT3 24 33 PEREQ1#*/PCIEXT5
PCIEXC3 25 32 PEREQ2#*/PCIEXC5
SATACLKT 26 31 PCIEXT4
SATACLKC 27 30 PCIEXC4
VDDPCIEX 28 29 GND
56-pin TSSOP
* Internal Pull-Up Resistor
** Internal Pull-Down Resistor
954206B
PROGRAMMABLE TIMING CONTROL HUB™ FOR MOBILE P4™ SYSTEMS 2 FEBRUARY 22, 2016
954206B DATASHEET
Functional Block Diagram
Table 1: Frequency Selection Table
FS
L
C B6b2 FS
L
B B6b1 FS
L
A B6b0
CPU
MHz
PCIEX
MHz
PCI
MHz
REF
MHz
USB
MHz
DOT
MHz S
p
read %
0 0 0 266.66 100.00 33.33 14.318 48.00 96.00 0.5% Down
0 0 1 133.33 100.00 33.33 14.318 48.00 96.00 0.5% Down
0 1 0 200.00 100.00 33.33 14.318 48.00 96.00 0.5% Down
0 1 1 166.66 100.00 33.33 14.318 48.00 96.00 0.5% Down
1 0 0 333.33 100.00 33.33 14.318 48.00 96.00 0.5% Down
1 0 1 100.00 100.00 33.33 14.318 48.00 96.00 0.5% Down
1 1 0 400.00 100.00 33.33 14.318 48.00 96.00 0.5% Down
1 1 1 200.00 100.00 33.33 14.318 48.00 96.00 0.5% Down
FEBRUARY 22, 2016 3 PROGRAMMABLE TIMING CONTROL HUB™ FOR MOBILE P4™ SYSTEMS
954206B DATASHEET
Pin Descriptions
PIN # PIN NAME TYPE DESCRIPTION
1 VDDPCI PWR Power supply for PCI clocks, nominal 3.3V
2 GND PWR Ground pin.
3 PCICLK3 OUT PCI clock output.
4 PCICLK4 OUT PCI clock output.
5 PCICLK5 OUT PCI clock output.
6 GND PWR Ground pin.
7 VDDPCI PWR Power supply for PCI clocks, nominal 3.3V
8 ITP_EN/PCICLK_F0 I/O
Free running PCI clock not affected by PCI_STOP# through I2C .
ITP_EN: latched input to select pin functionality
1 = CPU_2_ITP pair
0 = PCIEX_6 pair
9 *SELPCIEX_LCDCLK#/PCICLK_F1 I/O
Latched select input for LCDCLK/PCIEX output 0 = LCDCLK, 1 = PCIEX /
Free running 3.3V PCI clock output.
10 Vtt_PwrGd#/PD IN
Vtt_PwrGd# is an active low input used to determine when latched inputs
are ready to be sampled. PD is an asynchronous active high input pin used
to put the device into a low power state. The internal clocks, PLLs and the
crystal oscillator are stopped.
11 VDD48 PWR Power pin for the 48MHz output.3.3V
12 FSLA/USB_48MHz I/O
3.3V tolerant input for CPU frequency selection. Refer to input electrical
characteristics for Vil_FS and Vih_FS values. / Fixed 48MHz USB clock
output. 3.3V.
13 GND PWR Ground pin.
14 DOTT_96MHz OUT True clock of differential pair for 96.00MHz DOT clock.
15 DOTC_96MHz OUT Complement clock of differential pair for 96.00MHz DOT clock.
16 FSLB/TEST_MODE IN
3.3V tolerant input for CPU frequency selection. Refer to input electrical
characteristics for Vil_FS and Vih_FS values. TEST_MODE is a real time
input to select between Hi-Z and REF/N divider mode while in test mode.
Refer to Test Clarification Table.
17 LCDCLK_SS/PCIEX0T OUT
True clock of LCDCLK_SS output / True clock of PCI Express differential
pair. Selected by SELPCIEX_LCDCLK#
18 LCDCLK_SS/PCIEX0C OUT
Complementary clock of LCDCLK_SS output / Complementary clock of PCI
Express differential pair. Selected by SELPCIEX_LCDCLK#
19 PCIEXT1 OUT True clock of differential PCI_Express pair.
20 PCIEXC1 OUT Complement clock of differential PCI_Express pair.
21 VDDPCIEX PWR Power supply for PCI Express clocks, nominal 3.3V
22 PCIEXT2 OUT True clock of differential PCI_Express pair.
23 PCIEXC2 OUT Complement clock of differential PCI_Express pair.
24 PCIEXT3 OUT True clock of differential PCI_Express pair.
25 PCIEXC3 OUT Complement clock of differential PCI_Express pair.
26 SATACLKT OUT True clock of differential SATA pair.
27 SATACLKC OUT Complement clock of differential SATA pair.
28 VDDPCIEX PWR Power supply for PCI Express clocks, nominal 3.3V

954206BGLF

Mfr. #:
Manufacturer:
IDT
Description:
Clock Synthesizer / Jitter Cleaner PC MAIN CLOCK
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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