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PDF ICS844101I-312 Data sheet ( Hoja de datos )
| Número de pieza | ICS844101I-312 | |
| Descripción | CRYSTAL-TO-LVDS 312.5MHZ FREQUENCY MARGINING SYNTHESIZER | |
| Fabricantes | ICS | |
| Logotipo |  |
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www.DataSheet4U.com
Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS844101I-312
FEMTOCLOCKS™ CRYSTAL-TO-LVDS
312.5MHZ FREQUENCY MARGINING SYNTHESIZER
GENERAL DESCRIPTION
The ICS844101I-312 is a low phase-noise
ICS frequency margining synthesizer and is a mem-
HiPerClockS™ ber of the HiPerClock S™ family of high perfor-
mance clock solutions from ICS. In the default
mode, the device nominally generates a
312.5MHz LVDS output clock signal from a 25MHz crystal
input. There is also a frequency margining mode available
where the device can be programmed, using the serial in-
terface, to vary the output frequency up or down from nomi-
nal in 2% steps. The ICS844101I-312 is provided in a 16-
pin TSSOP.
FEATURES
• One 312.5MHz nominal LVDS output
• Selectable crystal oscillator interface designed for 25MHz,
18pF parallel resonant crystal or LVCMOS single-ended
input
• Output frequency can be varied in 2% steps ± from nominal
• VCO range: 560MHz - 690MHz
• RMS phase jitter @ 312.5MHz, using a 25MHz crystal
(1.875MHz-20MHz): 0.52ps (typical)
• Output supply modes
Core/Output
3.3V/3.3V
3.3V/2.5V
• -40°C to 85°C ambient operating temperature
• Available in both standard and lead-free RoHS-complaint
packages
BLOCK DIAGRAM
OE Pullup
CLK Pulldown
25MHz
XTAL_IN
OSC
XTAL_OUT
SEL Pulldown
1
0
S_CLOCK
S_DATA
S_LOAD
MODE
Pulldown
Pulldown
Pulldown
Pulldown
÷P
Phase
VCO
Detector
560 - 690MHz
÷M
Serial Control
÷N
PIN ASSIGNMENT
GND
S_LOAD
S_DATA
Q S_CLOCK
SEL
nQ OE
VDDA
VDD
1
2
3
4
5
6
7
8
16 MODE
1 5 VDDO
14 Q
13 nQ
12 GND
11 CLK
10 XTAL_OUT
9 XTAL_IN
ICS844101I-312
16-Lead TSSOP
4.4mm x 5.0mm x 0.92mm
package body
G Package
Top View
The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on
initial product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications
without notice.
844101AGI-312
www.icst.com/products/hiperclocks.html
REV. A NOVEMBER 28, 2005
1
1 page  
Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS844101I-312
FEMTOCLOCKS™ CRYSTAL-TO-LVDS
312.5MHZ FREQUENCY MARGINING SYNTHESIZER
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V
DD
4.6V
Inputs, V
I
Outputs, IO
Continuous Current
Surge Current
-0.5V to V + 0.5V
DD
10mA
15mA
Package Thermal Impedance, θJA 89°C/W (0 lfpm)
Storage Temperature, TSTG
-65°C to 150°C
NOTE: Stresses beyond those listed under Absolute
Maximum Ratings may cause permanent damage to the
device.These ratings are stress specifications only. Functional
operation of product at these conditions or any conditions be-
yond those listed in the DC Characteristics or AC Character-
istics is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect product reliability.
TABLE 5A. POWER SUPPLY DC CHARACTERISTICS, VDD = VDDA = VDDO = 3.3V±5%, TA = -40°C TO 85°C
Symbol Parameter
Test Conditions
Minimum Typical
VDD
VDDA
VDDO
IDD
I
DDA
IDDO
Core Supply Voltage
Analog Supply Voltage
Output Supply Voltage
Power Supply Current
Analog Supply Current
Output Supply Current
3.135
3.135
3.135
3.3
3.3
3.3
85
7
19
Maximum
3.465
3.465
3.465
Units
V
V
V
mA
mA
mA
TABLE
5B.
POWER
SUPPLY
DC
CHARACTERISTICS,
V=
DD
V=
DDA
3.3V±5%,V
DDO
=
2.5V±5%,
TA
=
-40°C
TO
85°C
Symbol Parameter
Test Conditions
Minimum Typical Maximum
VDD
V
DDA
VDDO
IDD
IDDA
IDDO
Core Supply Voltage
Analog Supply Voltage
Output Supply Voltage
Power Supply Current
Analog Supply Current
Output Supply Current
3.135 3.3 3.465
3.135 3.3 3.465
2.375 2.5 2.625
85
7
18
Units
V
V
V
mA
mA
mA
844101AGI-312
www.icst.com/products/hiperclocks.html
5
REV. A NOVEMBER 28, 2005
5 Page 
Integrated
Circuit
Systems, Inc.
PRELIMINARY
ICS844101I-312
FEMTOCLOCKS™ CRYSTAL-TO-LVDS
312.5MHZ FREQUENCY MARGINING SYNTHESIZER
RELIABILITY INFORMATION
TABLE 9. θJAVS. AIR FLOW TABLE FOR 16 LEAD TSSOP
θJA by Velocity (Linear Feet per Minute)
Single-Layer PCB, JEDEC Standard Test Boards
Multi-Layer PCB, JEDEC Standard Test Boards
0
137.1°C/W
89.0°C/W
200
118.2°C/W
81.8°C/W
500
106.8°C/W
78.1°C/W
NOTE: Most modern PCB designs use multi-layered boards.The data in the second row pertains to most designs.
TRANSISTOR COUNT
The transistor count for ICS844101I-312 is: 4093
844101AGI-312
www.icst.com/products/hiperclocks.html
11
REV. A NOVEMBER 28, 2005
11 Page | ||
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| PDF Descargar | [ Datasheet ICS844101I-312.PDF ] | |
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