ics8430-111 Integrated Device Technology, ics8430-111 Datasheet

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ics8430-111

Manufacturer Part Number
ics8430-111
Description
Programmable Low-jitter Lvpecl Or Lvcmos-input Lvpecl-output 2-output 700-mhz Clock Synthesizer
Manufacturer
Integrated Device Technology
Datasheet
B
G
ended TEST_CLK input accepts LVCMOS or LVTTL input levels
and translates them to 3.3V LVPECL levels. The VCO operates
at a frequency range of 200MHz to 700MHz. With the output
configured to divide the VCO frequency by 2, output frequency
steps as small as 2MHz can be achieved using a 16MHz differ-
ential or single ended reference clock. Output frequencies up to
700MHz can be programmed using the serial or parallel inter-
faces to the configuration logic. The low jitter and frequency range
of the ICS8430-111 makes it an ideal clock generator for most
clock tree applications.
700MHZ, LOW JITTER, DIFFERENTIAL-TO-
3.3V LVPECL FREQUENCY SYNTHESIZER
The Preliminary Information presented herein represents a product in pre-production. The noted characteristics are based on initial product characterization
and/or qualification. Integrated Device Technology, Incorporated (IDT) reserves the right to change any circuitry or specifications without notice.
IDT
TEST_CLK
HiPerClockS™
S_CLOCK
VCO_SEL
nP_LOAD
IC S
CLK_SEL
S_LOAD
LOCK
S_DATA
ENERAL
M0:M8
N0:N2
nCLK
/ ICS
CLK
MR
3.3V LVPECL FREQUENCY SYNTHESIZER
D
The ICS8430-111 is a general purpose, dual output
high frequency synthesizer and a member of the
HiPerClockS™ family of High Performance Clock
Solutions from IDT. The CLK, nCLK pair can accept
most standard differential input levels. The single
IAGRAM
D
ESCRIPTION
PHASE DETECTOR
0
1
÷ 16
÷ M
CONFIGURATION
INTERFACE
VCO
LOGIC
÷ 2
PLL
0
1
÷ N
FOUT0
nFOUT0
FOUT1
nFOUT1
TEST
1
F
• Dual differential 3.3V LVPECL output
• Selectable 14MHz to 27MHz differential CLK, nCLK
• CLK, nCLK accepts any differential input signal:
• TEST_CLK accepts the following input types:
• Output frequency range up to 700MHz
• VCO range: 200MHz to 700MHz
• Parallel or serial interface for programming counter
• Cycle-to-cycle jitter: 25ps (maximum)
• 3.3V supply voltage
• 0°C to 70°C ambient operating temperature
• Available in both standard (RoHS 5) and lead-free (RoHS 6)
• Industrial termperature information available upon request
or TEST_CLK input
LVPECL, LVHSTL, LVDS, SSTL, HCSL
LVCMOS, LVTTL
and output dividers
packages
EATURES
P
V
IN
M5
M6
M7
M8
N0
N1
N2
EE
7mm x 7mm x 1.4mm package body
A
1
2
3
4
5
6
7
8
SSIGNMENT
32 31 30 29 28 27 26 25
9 10 11 12 13 14 15 16
ICS8430DY-111 REV. F JANUARY 29, 2007
ICS8430-111
32-Lead LQFP
Y Package
Top View
PRELIMINARY
ICS8430-111
24
23
22
21
20
19
18
17
CLK
TEST_CLK
CLK_SEL
V
S_LOAD
S_DATA
S_CLOCK
MR
CCA

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ics8430-111 Summary of contents

Page 1

... Output frequencies up to 700MHz can be programmed using the serial or parallel inter- faces to the configuration logic. The low jitter and frequency range of the ICS8430-111 makes it an ideal clock generator for most clock tree applications ...

Page 2

... F D UNCTIONAL ESCRIPTION The ICS8430-111 features a fully integrated PLL and there- fore requires no external components for setting the loop bandwidth. A differential clock input is used as the input to the on-chip oscillator. The output of the oscillator is divided by 16 prior to the phase detector. A16MHz clock input provides a 1MHz reference frequency ...

Page 3

... ICS8430-111 700MHZ, LOW JITTER, DIFFERENTIAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER ABLE IN ESCRIPTIONS ...

Page 4

... ICS8430-111 700MHZ, LOW JITTER, DIFFERENTIAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER T 3A ABLE ARALLEL AND ERIAL ODE ↑ ↑ ...

Page 5

... ICS8430-111 700MHZ, LOW JITTER, DIFFERENTIAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER BSOLUTE AXIMUM ATINGS Supply Voltage Inputs, V -0. Outputs Continuous Current 50mA Surge Current 100mA Package Thermal Impedance, θ 47.9°C/W (0 lfpm) JA Storage Temperature, T -65°C to 150°C STG T 4A ...

Page 6

... ICS8430-111 700MHZ, LOW JITTER, DIFFERENTIAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER T 4C ABLE IFFERENTIAL HARACTERISTICS ...

Page 7

... ICS8430-111 700MHZ, LOW JITTER, DIFFERENTIAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER ABLE HARACTERISTICS ...

Page 8

... ICS8430-111 700MHZ, LOW JITTER, DIFFERENTIAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER P ARAMETER CCA V CCO LVPECL V EE -1.3V ± 0.165V 3. UTPUT OAD EST IRCUIT nFOUTx FOUTx nFOUTy FOUTy tsk( UTPUT KEW nFOUTx FOUTx tcycle n tjit(cc) = tcycle n – tcycle n+1 1000 Cycles ...

Page 9

... UPPLY ILTERING ECHNIQUES As in any high speed analog circuitry, the power supply pins are vulnerable to random noise. The ICS8430-111 provides separate power supplies to isolate any high switching noise from the outputs to the internal PLL. V should be individually connected to the power supply plane through vias, and bypass capacitors should be used for each pin. To achieve optimum jitter performance, power supply isolation is required. Figure 2 illustrates how a 10Ω ...

Page 10

... ICS8430-111 700MHZ, LOW JITTER, DIFFERENTIAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER IRING THE IFFERENTIAL NPUT TO Figure 3 shows how the differential input can be wired to accept single ended levels. The reference voltage V_REF = V generated by the bias resistors R1, R2 and C1. This bias circuit should be located as close as possible to the input pin. The ratio ...

Page 11

... ICS8430-111 700MHZ, LOW JITTER, DIFFERENTIAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER IFFERENTIAL LOCK NPUT NTERFACE The CLK /nCLK accepts LVDS, LVPECL, LVHSTL, SSTL, HCSL and other differential signals. Both V SWING V and V input requirements. Figures show interface PP CMR examples for the HiPerClockS CLK/nCLK input driven by the most common driver types ...

Page 12

... ICS8430-111 700MHZ, LOW JITTER, DIFFERENTIAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER T 3.3V LVPECL O ERMINATION FOR The clock layout topology shown below is a typical termination for LVPECL outputs. The two different layouts mentioned are recommended only as guidelines. FOUT and nFOUT are low impedance follower outputs that generate ECL/LVPECL compatible outputs ...

Page 13

... Equations and example calculations are also provided. 1. Power Dissipation. The total power dissipation for the ICS8430-111 is the sum of the core power plus the power dissipated in the load(s). The following is the power dissipation for V NOTE: Please refer to Section 3 for details on calculating power dissipated in the load. ...

Page 14

... ICS8430-111 700MHZ, LOW JITTER, DIFFERENTIAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER 3. Calculations and Equations. The purpose of this section is to derive the power dissipated into the load. LVPECL output driver circuit and termination are shown in Figure 6. To calculate worst case power dissipation into the load, use the following equations which assume a 50Ω load, and a termination voltage ...

Page 15

... Single-Layer PCB, JEDEC Standard Test Boards Multi-Layer PCB, JEDEC Standard Test Boards NOTE: Most modern PCB designs use multi-layered boards. The data in the second row pertains to most designs RANSISTOR OUNT The transistor count for ICS8430-111 is: 3960 IDT ™ / ICS ™ 3.3V LVPECL FREQUENCY SYNTHESIZER R ...

Page 16

... ICS8430-111 700MHZ, LOW JITTER, DIFFERENTIAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER ACKAGE UTLINE UFFIX FOR T Reference Document: JEDEC Publication 95, MS-026 IDT ™ / ICS ™ 3.3V LVPECL FREQUENCY SYNTHESIZER LQFP EAD Thermal Pad Down ABLE ACKAGE IMENSIONS ...

Page 17

... ICS8430-111 700MHZ, LOW JITTER, DIFFERENTIAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER T 10 ABLE RDERING NFORMATION ...

Page 18

... ICS8430-111 700MHZ, LOW JITTER, DIFFERENTIAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER Innovate with IDT and accelerate your future networks. Contact: www.IDT.com For Sales 800-345-7015 408-284-8200 Fax: 408-284-2775 Corporate Headquarters Integrated Device Technology, Inc. 6024 Silver Creek Valley Road San Jose, CA 95138 United States 800 345 7015 +408 284 8200 (outside U.S.) © ...

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