View P1707A-08TT_1292774.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

October 2003 rev 1.0
Notebook LCD Panel EMI Reduction IC
Features
FCC approved method of EMI attenuation. Generates a low EMI spread spectrum clock of the input frequency. Optimized for frequency range from 60 to 175MHz. Internal loop filter minimizes external components and board space. Four selectable spread ranges. Low inherent cycle-to-cycle jitter. 3.3V operating voltage range. TTL or CMOS compatible inputs and outputs. Ultra-low power CMOS design. 14.85 mA @3.3V, 140MHz 16.69mA @3.3V, 162MHz 17.78 mA @3.3V, 175MHz
P1707A
down stream clock and data dependent signals. The P1707A 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 P1707A 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 P1707A uses the most efficient and optimized modulation profile approved by the FCC and is implemented in a proprietary all digital method.
Supports notebook VGA and other LCD timing controller applications. Pinout compatible to ICS MK1707 and Cypress CY25561/CY25560. SSON/SBM pin for Spread Spectrum On/Off and Standby Mode controls.
Available in 8-pin SOIC and TSSOP.
Applications
The P1707A is targeted towards notebook LCD displays, and other displays using an LVDS interface, PC peripheral devices, and embedded systems.
Product Description
The P1707A is a versatile spread spectrum frequency modulator designed specifically for input clock frequencies. The P1707A reduces electromagnetic interference (EMI) at the clock source, allowing system wide reduction of EMI of
Block Diagram
SR0
SR1 SSON
VDD
Modulation CLKIN Frequency Divider Feedback Divider
PLL
Phase Detector
Loop Filter
VCO
Output Divider
ModOUT
VSS
Alliance Semiconductor 2575, Augustine Drive * Santa Clara, CA * Tel: 408.855.4900 * Fax: 408.855.4999 * www.alsc.com
Notice: The information in this document is subject to change without notice.
October 2003 rev 1.0
Pin Configuration
P1707A
CLKIN VDD VSS ModOUT
1 2 P1707A 3 4
8 7 6 5
NC SR0 SR1 SSON/SBM
Pin Description
Pin# 1 2 3 4 5 6 7 8
Pin Name CLKIN VDD VSS ModOUT SSON/SBM SR1 SR0 NC
Type I P P O I I I -
Description Connect to externally generated clock signal. To put the part into standby mode, disable the input clock signal to this pin and pull SSON/SBM (pin 5) low. Refer Standby Mode Selection Table. Connect to +3.3V. Ground Connection. Connect to system ground. Spread spectrum clock output. Spread Spectrum On/Off and standby mode control. Refer Standby Mode Selection Table. This pin has an internal pull-up resistor. Digital logic input used to select Spreading Range. Refer Spread Spectrum Selection Table. This pin has an internal pull-up resistor. Digital logic input used to select Spreading Range. Refer Spread Spectrum Selection Table. This pin has an internal pull-up resistor. No connect.
Notebook LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
2 of 10
October 2003 rev 1.0
Standby Mode Selection CLKIN Disabled Disabled Enabled Enabled SSON/SBM 0 1 0 1 Spread Spectrum N/A N/A Off On ModOUT Disabled Disabled Reference Normal PLL Disabled Free Running Disabled Normal
P1707A
Mode Standby Free Running Buffer out Normal
Spread Range Selection SR1 0 0 1 1 SR0 0 1 0 1 Spreading Range 1.50% 2.50% 0.50% 1.00% Modulation Rate (FIN/80) * 34.72 KHz (FIN/80) * 34.72 KHz (FIN/80) * 34.72 KHz (FIN/80) * 34.72 KHz
Notebook LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
3 of 10
October 2003 rev 1.0
P1707A
Schematic for Notebook VGA Application
60MHz to 175MHz pixel clock input from VGA chip 0.1F FB VDD
1
P1707A NC CLKIN
8
Pin 8 can be tied either high or low, or it can be left unconnected. Tie SR0 and SR1 high/low according to spread range desired. External resistors are not needed to pull these pins high. Pin 5 SSON should be left unconnected to turn on spread spectrum. Pull this pin low to turn spread spectrum OFF and enable stand-by mode.
2
VDD
SR0
7
3
VSS
SR1
6
4
ModOUT
SSON
5
Note: To set the P1707A to standby mode, disable the input clock (pin 1 CLKIN) and pull SSON (pin 5) low. Refer Standby Mode Selection Table.
Notebook LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
4 of 10
October 2003 rev 1.0
Absolute Maximum Ratings Symbol VDD, VIN TSTG TA Parameter Voltage on any pin with respect to GND Storage temperature Operating temperature Rating -0.5 to + 7.0 -65 to +125
P1707A
Unit V C
0 to 70 C Note: These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for extended periods may affect device reliability.
DC Electrical Characteristics Symbol VIL VIH IIL IIH IXOL IXOH VOL VOH ICC IDD VDD tON ZOUT Input low voltage Input high voltage Input low current (pull-up resistors on inputs SR0, SR1 and SSON/SBM) Input high current XOUT output low current @ 0.4V, VDD = 3.3V XOUT output high current @ 2.5V, VDD = 3.3V Output low voltage VDD = 3.3V, IOL = 20mA Output high voltage VDD = 3.3V, IOH = 20mA Dynamic supply current normal mode 3.3V and 10pF loading Static supply current standby mode Operating voltage Power up time (first locked clock cycle after power up) Clock output impedance Parameter Min GND - 0.3 2.0 2.5 8.46 2.7 Typ 3 3 12 0.6 3.3 0.18 50 Max 0.8 VDD + 0.3 -35 35 0.4 17.78 3.7 Unit V V A A mA mA V V mA mA V mS
Notebook LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
5 of 10
October 2003 rev 1.0
AC Electrical Characteristics Symbol fIN fOUT tLH* tHL* tJC Parameter Input frequency Output frequency Output rise time Measured at 0.8V to 2.0V Output fall time Measured at 0.8V to 2.0V Jitter (cycle to cycle) Min 60 60 0.7 0.6 45 Typ 0.9 0.8 50
P1707A
Max 175 175 1.1 1.0 360 55
Unit MHz MHz ns ns ps %
tD Output duty cycle *tLH and tHL are measured into a capacitive load of 15pF
Notebook LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
6 of 10
October 2003 rev 1.0
Package Information
P1707A
Mechanical Package Outline 8-Pin SOIC
E
H
D
A2
A
e B A 1
C L
D
Symbol
Dimensions in inches Min Max 0.071 0.010 0.069 0.020 0.01 0.202 0.164
Dimensions in millimeters Min 1.45 0.10 1.35 0.31 0.10 4.72 3.75 Max 1.80 0.25 1.75 0.51 0.25 5.12 4.15 1.27 BSC 5.70 0.30 0 6.30 0.70 8
A A1 A2 B C D E e H L
0.057 0.004 0.053 0.012 0.004 0.186 0.148
0.050 BSC 0.224 0.012 0 0.248 0.028 8
Note: Controlling dimensions are millimeters SOIC - 0.074 grams unit weight
Notebook LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
7 of 10
October 2003 rev 1.0
P1707A
Mechanical Package Outline 8-Pin TSSOP
H
E D A2 A e B A1 L C
Dimensions in inches Symbol A A1 A2 B C D E e H L 0.002 0.031 0.007 0.004 0.114 0.169 Min Max 0.047 0.006 0.041 0.012 0.008 0.122 0.177
Dimensions in millimeters Min Max 1.10 0.05 0.80 0.19 0.09 2.90 4.30 0.65 BSC 6.20 0.45 0 6.60 0.75 8 0.15 1.05 0.30 0.20 3.10 4.50
0.026 BSC 0.244 0.018 0 0.260 0.030 8
Note: Controlling dimensions are millimeters TSSOP - 0.034 grams unit weight
Notebook LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
8 of 10
October 2003 rev 1.0
Ordering Codes Part Number P1707A-08ST P1707A-08SR P1707A-08TT P1707A-08TR Marking P1707A P1707A P1707A P1707A Package Type 8-pin SOIC, tube 8-pin SOIC, tape & reel 8-pin TSSOP, tube 8-pin TSSOP, tape and reel 2500 2500 Qty per reel Temperature (C) 0 to 70 0 to 70 0 to 70 0 to 70
P1707A
Device Ordering Information
P1707A-08
XX
OR - SOT23/T/R TT - TSSOP, TUBE TR - TSSOP, T/R VT - TVSOP, TUBE VR - TVSOP, T/R ST - SOIC, TUBE SR - SOIC, T/R QR - QFN, T/R QT - QFN, TUBE BT - BGA, TUBE BR - BGA, T/R
Pin Count
DEVICE NUMBER
Flow: P = Commercial Temperature Range (0C to 70C) I = Industrial Temperature Range (-25C to 85C)
Notebook LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
9 of 10
October 2003 rev 1.0
P1707A
Alliance Semiconductor Corporation 2595, Augustine Drive, Santa Clara, CA 95054 Tel# 408-855-4900 Fax: 408-855-4999 www.alsc.com
Copyright (c) Alliance Semiconductor All Rights Reserved Preliminary Information Part Number: P1707A Document Version: v1.0
(c) Copyright 2003 Alliance Semiconductor Corporation. All rights reserved. Our three-point logo, our name and Intelliwatt are trademarks or registered trademarks of Alliance. All other brand and product names may be the trademarks of their respective companies. Alliance reserves the right to make changes to this document and its products at any time without notice. Alliance assumes no responsibility for any errors that may appear in this document. The data contained herein represents Alliance's best data and/or estimates at the time of issuance. Alliance reserves the right to change or correct this data at any time, without notice. If the product described herein is under development, significant changes to these specifications are possible. The information in this product data sheet is intended to be general descriptive information for potential customers and users, and is not intended to operate as, or provide, any guarantee or warrantee to any user or customer. Alliance does not assume any responsibility or liability arising out of the application or use of any product described herein, and disclaims any express or implied warranties related to the sale and/or use of Alliance products including liability or warranties related to fitness for a particular purpose, merchantability, or infringement of any intellectual property rights, except as express agreed to in Alliance's Terms and Conditions of Sale (which are available from Alliance). All sales of Alliance products are made exclusively according to Alliance's Terms and Conditions of Sale. The purchase of products from Alliance does not convey a license under any patent rights, copyrights; mask works rights, trademarks, or any other intellectual property rights of Alliance or third parties. Alliance does not authorize its products for use as critical components in life-supporting systems where a malfunction or failure may reasonably be expected to result in significant injury to the user, and the inclusion of Alliance products in such life-supporting systems implies that the manufacturer assumes all risk of such use and agrees to indemnify Alliance against all claims arising from such use.
Notebook LCD Panel EMI Reduction IC
Notice: The information in this document is subject to change without notice.
10 of 10

▲Up To Search▲

Price & Availability of P1707A-08TT

	To Download P1707A-08TT Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .