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PDF ICS84314AYT Data sheet ( Hoja de datos )
| Número de pieza | ICS84314AYT | |
| Descripción | 350MHZ/ CRYSTAL-TO-3.3V/2.5V LVPECL FREQUENCY SYNTHESIZER W/FANOUT BUFFER | |
| Fabricantes | Integrated Circuit Systems | |
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Integrated
Circuit
Systems, Inc.
ICS84314
350MHZ, CRYSTAL-TO-3.3V/2.5V LVPECL
FREQUENCY SYNTHESIZER W/FANOUT BUFFER
GENERAL DESCRIPTION
ICS
The ICS84314 is a general purpose quad output
frequency synthesizer and a member of the
HiPerClockS™ HiPerClockS™ family of High Performance Clock
Solutions from ICS. When the device uses par-
allel loading, the M bits are programmable and
the output divider is hard-wired for divide by 2 thus providing
a frequency range of 125MHz to 350MHz. In serial program-
ming mode, the M bits are programmable and the output di-
vider can be set for either divide by 2 or divide by 4, providing
a frequency range of 62.5MHz to 350MHz. The low cycle-
cycle jitter and broad frequency range of the ICS84314 make
it an ideal clock generator for a variety of demanding applica-
tions which require high performance.
FEATURES
• Fully integrated PLL
• 4 differential 3.3V or 2.5V LVPECL outputs
• Selectable crystal oscillator interface
or LVCMOS TEST_CLK input
• Output frequency range: 62.5MHz to 350MHz
• VCO range: 250MHz to 700MHz
• Parallel interface for programming counter
and output dividers during power-up
• Serial 3 wire interface
• Cycle-to-cycle jitter: 23ps (typical)
• Output skew: 16ps (typical)
• Output duty cycle: 49% < odc < 51%, fout ≤ 125MHz
• Full 3.3V or mixed 3.3V core, 2.5V operating supply
• 0°C to 85°C ambient operating temperature
• Lead-Free package available
BLOCK DIAGRAM
PIN ASSIGNMENT
VCO_SEL
XTAL_SEL
TEST_CLK
0
32 31 30 29 28 27 26 25
M4 1
M5 2
24 TEST_CLK
23 XTAL_SEL
XTAL1
XTAL2
OSC
1
÷ 16
M6 3
M7 4
M8 5
VEE 6
ICS84314
2 2 VCCA
21 S_LOAD
20 S_DATA
19 S_CLOCK
VCC 7
18 MR
PLL
PHASE DETECTOR
Q0
nQ0
VCCO
8 17
9 10 11 12 13 14 15 16
VCCO
MR Q1
VCO
0 ÷2
nQ1
÷M
÷4
1
Q2
nQ2
S_LOAD
S_DATA
S_CLOCK
nP_LOAD
÷2
CONFIGURATION
INTERFACE
LOGIC
Q3 32-Lead LQFP
nQ3 7mm x 7mm x 1.4mm package body
Y Package
Top View
M0:M8
84314AY
www.icst.com/products/hiperclocks.html
1
REV. C JANUARY 27, 2005
1 page  
Integrated
Circuit
Systems, Inc.
ICS84314
350MHZ, CRYSTAL-TO-3.3V/2.5V LVPECL
FREQUENCY SYNTHESIZER W/FANOUT BUFFER
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VCC
Inputs, VI
Outputs, IO
Continuous Current
Surge Current
Package Thermal Impedance, θJA
Storage Temperature, T
STG
4.6V
-0.5V to VCC + 0.5 V
50mA
100mA
47.9°C/W (0 lfpm)
-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, VCC = VCCA = 3.3V±5%, VCCO = 3.3V±5% OR 2.5V±5%, TA = 0°C TO 85°C
Symbol
VCC
V
CCA
Parameter
Core Supply Voltage
Analog Supply Voltage
VCCO
Output Supply Voltage
IEE Power Supply Current
ICCA Analog Supply Current
Test Conditions
Minimum
3.135
3.135
3.135
2.375
Typical
3.3
3.3
3.3
2.5
Maximum
3.465
3.465
3.465
2.625
150
17
Units
V
V
V
V
mA
mA
TABLE 5B. LVCMOS/LVTTL DC CHARACTERISTICS, VCC = VCCA = 3.3V±5%, VCCO = 3.3V±5% OR 2.5V±5%, TA = 0°C TO 85°C
Symbol
Parameter
TEST_CLK; NOTE 1
VIH
Input
VCO_SEL, XTAL_SEL,
High Voltage nP_LOAD, MR, M0:M8,
S_LOAD, S_DATA, S_CLOCK
TEST_CLK; NOTE 1
VIL
Input
VCO_SEL, XTAL_SEL,
Low Voltage nP_LOAD, MR, M0:M8,
S_LOAD, S_DATA, S_CLOCK
M0:M7, MR, nP_LOAD,
S_CLOCK, S_DATA,
IIH
Input
S_LOAD
High Current M8, XTAL_SEL, VCO_SEL
TEST_CLK
M0:M7, MR, nP_LOAD,
S_CLOCK, S_DATA,
IIL
Input
S_LOAD
Low Current
M8, XTAL_SEL, VCO_SEL
NOTE:1 Characterized with 1ns input edge rate.
Test Conditions
VCC = VIN = 3.465V
VCC = VIN = 3.465V
VCC = VIN = 3.465V
VCC = 3.465V,
VIN = 0V
VCC = 3.465V,
V = 0V
IN
Minimum Typical Maximum Units
2.35
VCC + 0.3
V
2
VCC + 0.3
V
-0.3 0.95 V
-0.3 0.8 V
-5
-150
150 µA
5 µA
200 µA
µA
µA
84314AY
www.icst.com/products/hiperclocks.html
5
REV. C JANUARY 27, 2005
5 Page 
Integrated
Circuit
Systems, Inc.
ICS84314
350MHZ, CRYSTAL-TO-3.3V/2.5V LVPECL
FREQUENCY SYNTHESIZER W/FANOUT BUFFER
LAYOUT GUIDELINE
The schematic of the ICS84314 layout example used in this layout
guideline is shown in Figure 6A.The ICS84314 recommended PCB
board layout for this example is shown in Figure 6B. This layout
example is used as a general guideline. The layout in the actual
system will depend on the selected component types, the density
of the components, the density of the traces, and the stack up of
the P.C.board.
C1
U3
1
2 M4
3
4
M5
M6
5
6
M7
M8
7
8
VEE
VCC
VCCO
C5
0.1u
C4
0.1u
X1 C2
ICS84314
TEST_CLK
XTAL_SEL
VCCA
S_LOAD
S_DATA
S_CLOCK
MR
VCCO
24
23
22
21
20
19
18
17
VCC=3.3V
VCC
VCC
VCCA
C11
0.01u
R7
10
C16
10u
C3
0.1u
Zo = 50 Ohm
Logic Input Pin Examples
Set Logic
VCC Input to
'1'
RU1
1K
To Logic
Input
pins
RD1
Not Install
Set Logic
VCC Input to
'0'
RU2
Not Install
RD2
1K
To Logic
Input
pins
+
Zo = 50 Ohm
-
R2 R1
50 50
C6 (Option)
0.1u
R3
50
Zo = 50 Ohm
Zo = 50 Ohm
+
-
R5 R4
50 50
C7 (Option)
0.1u
R6
50
FIGURE 6A. SCHEMATIC OF 3.3V/3.3V RECOMMENDED LAYOUT
84314AY
www.icst.com/products/hiperclocks.html
11
REV. C JANUARY 27, 2005
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet ICS84314AYT.PDF ] | |
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