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  ON Semiconductor Electronic Components Datasheet  

P1817A Datasheet

Low-Power Mobile VGA EMI Reduction IC

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P1817A, P1817B
Product Preview
Low-Power Mobile VGA EMI
Reduction IC
Description
The P1817 is a versatile spread spectrum frequency modulator
designed specifically for input clock frequencies. The P1817 reduces
electromagnetic interference (EMI) at the clock source, allowing
system wide reduction of EMI of down stream clock and data
dependent signals. The P1817 allows significant system cost savings
by reducing the number of circuit board layers, ferrite beads, shielding
and other passive components that are traditionally required to pass
EMI regulations.
The P1817 modulates the output of a single PLL in order to “spread”
the bandwidth of a synthesized clock, and more importantly, decreases
the peak amplitudes of its harmonics. This results in significantly
lower system EMI compared to the typical narrow band signal
produced by oscillators and most frequency generators. Lowering
EMI by increasing a signal’s bandwidth is called ‘spread spectrum
clock generation.’
The P1817 uses the most efficient and optimized modulation profile
approved by the FCC and is implemented in a proprietary all digital
method.
http://onsemi.com
SOIC8
S SUFFIX
CASE 751BD
TSSOP8
T SUFFIX
CASE 948AL
PIN CONFIGURATION
1
CLKIN / XIN
XOUT
VSS
VDD
SR0 REF
SSON / SBM
ModOUT
Applications
The P1817 is targeted towards notebook LCD displays, and other
displays using an LVDS interface, PC peripheral devices, and
embedded systems.
Features
FCC Approved Method of EMI Attenuation
Generates a Low EMI Spread Spectrum Clock of the Input Frequency
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
Optimized for Frequency Range from:
P1817A – 20 to 32 MHz
P1817B – 10 to 20 MHz
Internal Loop Filter Minimizes External Components and Board Space
Two Selectable Spread Ranges
Low Inherent CycletoCycle Jitter
3.3 V or 5 V Operating Voltage Range
TTL or CMOS Compatible Inputs and Outputs
Ultralow Power CMOS Design
3.17 mA @ 3.3 V, 10 MHz | 6.20 mA @ 5.0 V, 10 MHz
4.28 mA @ 3.3 V, 14 MHz | 7.50 mA @ 5.0 V, 14 MHz
5.50 mA @ 3.3 V, 20 MHz | 9.50 mA @ 5.0 V, 20 MHz
Supports Notebook VGA and Other LCD Timing Controller Applications
SSON / SBM Pin for Spread Spectrum On/Off and Standby Mode Controls
Available in 8pin SOIC and TSSOP
These are PbFree Devices
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
© Semiconductor Components Industries, LLC, 2011
August, 2011 Rev. P3
1
Publication Order Number:
P1817A/D


  ON Semiconductor Electronic Components Datasheet  

P1817A Datasheet

Low-Power Mobile VGA EMI Reduction IC

No Preview Available !

CLKIN / XIN
XOUT
REF
P1817A, P1817B
SR0 SSON
VDD
Frequency
Divider
Feedback
Divider
Modulation
Phase
Detector
Loop
Filter
PLL
VCO
Output
Divider
ModOUT
VSS
Figure 1. Block Diagram
Table 1. ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Rating
Unit
VDD, VIN Voltage on any pin with respect to GND
0.5 to +7.0
V
TSTG
Storage temperature
65 to +125
°C
TA Operating temperature
0 to 70
°C
TDV Static Discharge Voltage (As per JEDEC STD22A114B)
2 KV
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
Table 2. DC ELECTRICAL CHARACTERISTICS
Symbol
Parameter
VIL Input low voltage
VIH Input high voltage
IIL Input low current (pullup resistors on inputs SR0, and SSON / SBM)
IIH Input high current (pulldown resistors on inputs SR0, and SSON / SBM)
IXOL
XOUT output low current
@ 0.4 V, VDD = 3.3 V
@ 0.4 V, VDD = 5.0 V
IXOH
XOUT output high current
@ 2.5 V, VDD = 3.3 V
@ 4.5 V, VDD = 5.0 V
VOL Output low voltage
VDD = 3.3 V, IOL = 20 mA
VDD = 5.0 V, IOL = 20 mA
VOH Output high voltage
VDD = 3.3 V, IOH = 20 mA
VDD = 5.0 V, IOH = 20 mA
ICC
Dynamic supply current standby mode
Normal Mode
3.3 V and 10 pF loading
5.0 V and 10 pF loading
IDD
VDD
Static supply current standby mode
Operating voltage
tON
ZOUT
Power up time (first locked clock cycle after power up)
Clock output impedance
Min
GND0.3
2.0
2.5
4.5
fINmin
3.2
6.2
2.7
Typ
3
20
3
20
fINtyp
0.6
3.3
0.18
50
Max
0.8
VDD+0.3
35
35
0.4
fINmax
7.0
13.6
5.5
Unit
V
V
mA
mA
mA
mA
V
V
mA
mA
V
mS
W
http://onsemi.com
2


Part Number P1817A
Description Low-Power Mobile VGA EMI Reduction IC
Maker ON Semiconductor
Total Page 7 Pages
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