900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Integrated Device Technology Electronic Components Datasheet

ICS840N202I Datasheet

NG Universal Frequency Translator

No Preview Available !

FemtoClock® NG Universal Frequency
Translator
ICS840N202I
DATA SHEET
General Description
The ICS840N202I is a highly flexible FemtoClock® NG general
purpose, low phase noise Frequency Translator / Synthesizer with
alarm and monitoring functions suitable for networking and
communications applications. It is able to generate any output
frequency in the 1MHz - 250MHz range (see Table 3 for details). A
wide range of input reference clocks and a range of low-cost
fundamental mode crystal frequencies may be used as the source
for the output frequency.
The ICS840N202I has three operating modes to support a very
broad spectrum of applications:
1) Frequency Synthesizer
Synthesizes output frequencies from a 16MHz - 40MHz
fundamental mode crystal.
Fractional feedback division is used, so there are no
requirements for any specific crystal frequency to produce the
desired output frequency with a high degree of accuracy.
2) High-Bandwidth Frequency Translator
Applications: PCI Express, Computing, General Purpose
Translates any input clock in the 16MHz - 710MHz frequency
range into any supported output frequency.
This mode has a high PLL loop bandwidth in order to track input
reference changes, such as Spread-Spectrum Clock
modulation, so it will not attenuate much jitter on the input
reference.
3) Low-Bandwidth Frequency Translator
Applications: Networking & Communications.
Translates any input clock in the 8kHz - 710MHz frequency
range into any supported output frequency.
This mode supports PLL loop bandwidths in the 10Hz - 580Hz
range and makes use of an external crystal to provide
significant jitter attenuation.
This device provides two factory-programmed default power-up
configurations burned into One-Time Programmable (OTP) memory.
The configuration to be used is selected by the CONFIG pin. The two
configurations are specified by the customer and are programmed by
IDT during the final test phase from an on-hand stock of blank
devices. The two configurations may be completely independent of
one another.
One usage example might be to install the device on a line card with
two optional daughter cards: an OC-3 option (configuration 0)
requiring a 155.52MHz clock translated from a 19.44MHz input and
a Gigabit Ethernet option (configuration 1) requiring a 125MHz clock
translated from the same 19.44MHz input reference.
To implement other configurations, these power-up default settings
can be overwritten after power-up using the I2C interface and the
device can be completely reconfigured. However, these settings
would have to be re-written each time the device powers-up.
Features
Fourth generation FemtoClock® NG technology
Universal Frequency Translator/Frequency Synthesizer
Two LVCMOS/LVTTL outputs
Both outputs may be set to use 2.5V or 3.3V output levels
Programmable output frequency: 1.0MHz to 250MHz
Two differential inputs support the following input types: LVPECL,
LVDS, LVHSTL, HCSL
Input frequency range: 8kHz - 710MHz
Crystal input frequency range: 16MHz - 40MHz
Two factory-set register configurations for power-up default state
Power-up default configuration pin or register selectable
Configurations customized via One-Time Programmable ROM
Settings may be overwritten after power-up via I2C
I2C Serial interface for register programming
RMS phase jitter at 125MHz, using a 40MHz crystal
(12kHz - 20MHz): 616fs (typical), Low Bandwidth Mode (FracN)
Output supply voltage modes:
VDD/VDDA/VDDO
3.3V/3.3V/3.3V
3.3V/3.3V/2.5V
2.5V/2.5V/2.5V
-40°C to 85°C ambient operating temperature
Lead-free (RoHS 6) packaging
Pin Assignment
XTAL_IN
XTAL_OUT
VDD
CLK_SEL
CLK0
nCLK0
VDD
GND
CLK1
nCLK1
40 39 38 37 36 35 34 33 32 31
1 30
2 29
3 ICS840N202I 28
4 40 Lead VFQFN 27
5 6mm x 6mm x 0.925mm 26
6 K Package 25
7 Top View 24
8 23
9 22
10 21
11 12 13 14 15 16 17 18 19 20
LOCK_IND
VDD
OE0
GND
Q0
VDDO
Q1
GND
OE1
GND
ICS840N202CKI REVISION A NOVEMBER 1, 2013
1
©2013 Integrated Device Technology, Inc.


Integrated Device Technology Electronic Components Datasheet

ICS840N202I Datasheet

NG Universal Frequency Translator

No Preview Available !

ICS840N202I Data Sheet
FemtoClock® NG Universal Frequency Translator
Complete Block Diagram
PLL_BYPASS
XTAL
XTAL_IN
XTA L_OUT
OSC
PD/LF
FemtoClock® NG
VCO
1995 - 2600 MHz
1
0
Feedback Divider
÷M_INT
[7:0]
÷M_FRAC
[17:0]
ADC
CLK_SEL
CLK0
nCLK0
CLK1
nCLK1
÷4 ÷M1[16:0]
0
÷P[16:0]
1
POR Control Logic
Global Registers
Register Set 0 0
Register Set 1 1
SCLK, S_A0, S_A1 SDATA CONFIG
PD/CP
Status Indicators
Output Divider
÷N[10:0]
Q0
OE0
Q1
OE1
LF1
R3
LF0 RS
CP
C3
CS
CLK_ACTIVE
LOCK_IND
XTALBAD
CLK0BAD
CLK1BAD
HOLDOVER
ICS840N202CKI REVISION A NOVEMBER 1, 2013
2
©2013 Integrated Device Technology, Inc.


Part Number ICS840N202I
Description NG Universal Frequency Translator
Maker IDT
Total Page 30 Pages
PDF Download

ICS840N202I Datasheet PDF

View PDF for Mobile








Similar Datasheet

1 ICS840N202I NG Universal Frequency Translator
IDT





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy