8T49N488 Datasheet PDF - Integrated Device Technology
| Part Number | 8T49N488 | |
| Description | NG QUAD Universal Frequency Translator | |
| Manufacturers | Integrated Device Technology | |
| Logo |  |
|
|
There is a preview and 8T49N488 download ( pdf file ) link at the bottom of this page. Total 30 Pages | ||
Preview 1 page No Preview Available !
FemtoClock® NG QUAD Universal
Frequency Translator
8T49N488
DATA SHEET
General Description
The 8T49N488 is a quad PLL with FemtoClock® NG technology, it
integrates low phase noise Frequency Translator / Synthesizer, Jitter
attenuation, and with alarm and monitoring functions suitable for
networking and communications applications. The device has four
fully independent PLLs, each PLL is able to generate any output
frequency in the 0.98MHz - 312.5MHz range and most output
frequencies in the 312.5MHz - 1,300MHz range (see Table 3 for
details). A wide range of input reference clocks and operation
reference clock may be used as the source for the output frequency.
Each PLL of 8T49N488 has three operating modes to support a very
broad spectrum of applications:
1) Frequency Synthesizer
• Synthesizes output frequencies from an external reference
clock REFCLK.
• Fractional feedback division is used, so there are no
requirements for any specific input reference clock 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.
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 REFCLK to provide
significant jitter attenuation.
Each PLL provides factory-programmed default power-up
configuration burned into One-Time Programmable (OTP) memory.
The configuration is specified by customer and are programmed by
IDT during the final test phase from an on-hand stock of blank
devices.
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.
Features
• Fourth generation FemtoClock® NG technology
• Four fully independent PLLs
• Universal Frequency TranslatorTM/Frequency Synthesizer and
Jitter attenuator
• Outputs are programmable as LVPECL or LVDS
• Programmable output frequency: 0.98MHz up to 1,300MHz
• Two differential inputs support the following input levels:
LVPECL, LVDS, LVHSTL, HCSL
• Input frequency range: 8kHz ~ 710MHz Low-Bandwidth
• Input frequency range: 16MHz ~ 710MHz High-Bandwidth
• REFCLK frequency range: 16MHz ~ 40MHz
• Input clock monitor and alarm
• Smoothed reference switch
• Factory-set register configuration for power-up default state
• Power-up default configuration
• Configuration 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 161.1328125MHz,using 40MHz REFCLK
(12kHz ~ 20MHz): 465fs (typical), Low Bandwidth Mode (FracN)
• RMS phase jitter at 400MHz,using 40MHz REFCLK
(12kHz ~ 20MHz): 333fs (typical), Synthesizer Mode (Integer FB)
• Full 2.5V ±5% supply mode
• -40°C to 85°C ambient operating temperature
• 10mm X 10mm CABGA package
• Lead-free (RoHS 6) packaging
8T49N488 REVISION B 03/23/15
1 ©2015 Integrated Device Technology, Inc.
|
| |
 
Table 2. Pin Characteristics
Symbol
Parameter
CIN
RPULLUP
RPULLDOWN
RPULLDOWN
Input Capacitance
Input Pullup Resistor
Input Pulldown Resistor
Input Pulldown REFCLK,
Resistor
PLL_BYPASS
RPULLUP
Input Pullup
Resistor
SDATA, SCLK
Pin Assignment
8T49N488 DATA SHEET
Test Conditions
Minimum
Typical
3.5
51
51
12.5
Maximum
Units
pF
k
k
k
12.5 k
J
Q0D
VEE_D VCCO_D
nQ1C
LF1C
LF0C
VEE_C
nQ0C
Q0C
H nQ0D
VEE_D
CLK0D nCLK0D LOCKD
Q1C
RSVD
VEE_C
VEE_C
G VEE_D
RSVD
CLK1D nCLK1D
SCLK
SDATA
CLK1C
CLK0C VCCO_C
F LF0D
Q1D
VCC_D CLK_SELD VCC_C CLK_SELC nCLK1C nCLK0C
nQ1B
E
LF1D
LOCKA VCCA_D
RSVD
REFCLK
PLL_BY
PASS
VCCA_C
LOCKC
LF1B
D nQ1D nCLK0A nCLK1A CLK_SELA VCCO_B CLK_SELB VCC_B
Q1B
LF0B
C VCCA_A CLK0A
CLK1A VCCO_A LOCKB NCLK1B CLK1B
RSVD
VEE_B
B Q0A
VEE_A
VEE_A
Q1A
VCC_A nCLK0B CLK0B
VEE_B
nQ0B
A
nQ0A
VEE_A
LF0A
LF1A
nQ1A
VCCA_B VEE_B
Q0B
1 2 3 45 6 7 8 9
8T49N488 Pin Map (bottom view)
REVISION B 03/23/15
5 FEMTOCLOCK®NG QUAD UNIVERSAL FREQUENCY TRANSLATOR
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for 8T49N488 electronic component. |
| Information | Total 30 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ 8T49N488.PDF Datasheet ] | |
Share Link :
Electronic Components Distributor
|
An electronic components distributor is a company that sources, stocks, and sells electronic components to manufacturers, engineers, and hobbyists. |
| SparkFun Electronics | Allied Electronics | DigiKey Electronics | Arrow Electronics |
| Mouser Electronics | Adafruit | Newark | Chip One Stop |
Featured Datasheets
| Part Number | Description | MFRS |
| 8T49N4811 | The function is I2C Programmable Ethernet Clock Generator. Integrated Device Technology | |
| 8T49N488 | The function is NG QUAD Universal Frequency Translator. Integrated Device Technology | |
Semiconductors commonly used in industry:
1N4148 |
BAW56 |
1N5400 |
NE555 | | ||
Quick jump to:
8T49
1N4
2N2
2SA
2SC
74H
BC
HCF
IRF
KA | ||