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Part: 620-01
Category:
Timing Circuits
-> Clock Synthesizers
Description:
Company: Integrated Circuit System
Datasheet: Download 620-01 datasheet File size : 521 kB
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PRELIMINARY INFORMATION
I C R O C LO C K
Description
The ICS620-01 is a low cost, low jitter, high performance clock synthesizer for digital still cameras. Using analog Phase-Locked Loop (PLL) techniques, the device uses a 14.318 MHz crystal input to produce multiple output clocks required in the camera. It provides selectable NTSC/PAL clock, a selectable processor clock, a selectable CCD clock, and a selectable interface clocks. Most clocks are generated to a very low ppm synthesis error rate. All clocks can be turned off using a power down mode. Custom versions with userdefined frequencies and power down modes are available in 6-8 weeks.
ICS620-01 Digital Still Camera Clock Source
Features
· Packaged in 28 pin, 150 mil wide SSOP (QSOP) · Provides all clocks necessary for many digital still camera systems · All clocks are frequency locked together · Interface clock for USB, P1394, or UART · Saves space over multiple crystals and oscillators · Clocks power down when all select pins are low · Full CMOS outputs also compatible with TTL levels · +3.3 V or +5 V operation · Low power, sub-micron CMOS process · Custom versions available
Block Diagram
Output Buffer ÷2 Output Buffer Output Buffer ÷2 Output Buffer Output Buffer ÷2 Output Buffer Output Buffer Output Buffer
NSEL1:0
2
PLL Clock Synthesis Circuitry PLL Clock Synthesis Circuitry PLL Clock Synthesis Circuitry PLL Clock Synthesis Circuitry
NTSC/PAL Clock 1 NTSC/PAL Clock 2 Processor Clock 1 Processor Clock 2 CCD Clock 1 CCD Clock 2 Interface Clock 1 Interface Clock 2
PSEL1:0
2
CSEL1:0 ISEL1:0
X1 X2
2 2
Crystal Oscillator
14.31818 MHz crystal
MDS 620-01 B 1
Revision 072098
Printed 12/4/00
Integrated Circuit Systems · 1271 Parkmoor Ave.·San Jose·CA·95126·(408)295-9800tel·(408)295-9818fax
PRELIMINARY INFORMATION
I C R O C LO C K
Pin Assignment
CSEL0 NC X2 X1 VDD NSEL1 VDD VDD NSEL0 GND GND CLKI2 CLKI1 CLKP2
ICS620-01 Digital Still Camera Clock Source
Clock C Frequency Select Table (MHz)
CSEL1 CSEL0 CLKC1 CLKC2 Actual error 0 0 Power Down - both outputs stop low 0 M 14.31818 7.15909 0 ppm 0 1 9.81818 4.90909 0 ppm M 0 7.3728 3.6864 31 ppm high M M 27 13.5 0 ppm M 1 8 4 0.017% high 1 0 28 14 0 ppm 1 M 24.54545 12.272725 11 ppm high 1 1 32 16 0.017% high
1 2 3 4 5 6 7 8 9 10 11 12 13 14
28 27 26 25 24 23 22 21 20 19 18 17 16 15
CSEL1 ISEL0 NC CLKN1 ISEL1 GND CLKN2 VDD PSEL0 GND CLKC1 CLKC2 PSEL1 CLKP1
Key: 0 = connect to ground, 1 = connect to VDD, M = leave unconnected (floating).
Processor Clock Select (MHz)
PSEL1 0 0 1 1 PSEL0 CLKP1 CLKP2 0 Power down both 1 20.50 10.25 0 23.96 11.98 1 24.5455 12.2727
Interface Clock Select (MHz)
ISEL1 ISEL0 CLKI1 CLKI2 0 0 Power down both 0 1 36.864 18.432 1 0 24.576 8.192 1 1 48 12
NTSC/PAL Clock Select (MHz)
NSEL1 NSEL0 0 0 0 M 0 1 1 0 1 M 1 1 CLKN1 CLKN2 Error Power down 8.8672 4.43361 2 ppm low 27 13.5 0 ppm 35.4688 17.7344 2 ppm low 7.1591 3.5795 0 ppm 28.6364 14.3182 0 ppm
Pin Descriptions
Pin # 1 2, 26 3 4 5, 7, 8, 21 6 9 10, 11, 19, 23 12 13 14 15 16 17 18 20 22 24 25 27 28 Name CSEL0 NC X2 X1 VDD NSEL1 NSEL0 GND CLKI2 CLKI1 CLKP2 CLKP1 PSEL1 CLKC2 CLKC1 PSEL0 CLKN2 ISEL1 CLKN1 ISEL0 CSEL1 Type TI XO XI P I TI P O O O O I O O I O I O I TI
Description C clock SELect pin 0. No Connect. Nothing is connected internally to this pin. Crystal connection. Connect to a 14.31818 MHz crystal or input clock. Crystal connection. Connect to a 14.31818 MHz crystal, or leave unconnected for clock. Connect to +3.3V or +5V. Must be same voltage on all pins. NTSC/PAL SELect pin 1. NTSC/PAL SELect pin 0. Connect to Ground. Interface CLocK output 2. Interface CLocK output 1. Processor CLocK output 2. Processor CLocK output 1. Processor clock SELect pin 1. C CLocK output 2. C CLocK output 1. Processor clock SELect pin 0. NTSC/PAL CLocK output 2. Interface clock SELect pin 1. NTSC/PAL CLocK output 1. Output may stop high or low during power down. Interface clock SELect pin 0. C clock SELect pin 1.
Key: I = Input, O = Output, P = Power supply connection, TI = tri-level input (automatically biased to M level if unconnected). Internal pull-ups are on pins 6, 16, 20, 24, and 27.
MDS 620-01 B
2
Revision 072098
Printed 12/4/00
Integrated Circuit Systems · 1271 Parkmoor Ave.·San Jose·CA·95126·(408)295-9800tel·(408)295-9818fax
PRELIMINARY INFORMATION
I C R O C LO C K
Electrical Specifications
Parameter Conditions
ICS620-01 Digital Still Camera Clock Source
Minimum
Typical
Maximum 7 VDD+0.5 70 260 150 5.5 0.8
Units V V °C °C °C V V V V V V V V V mA mA k pF MHz ns ns % ps
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VDD Inputs and Clock Outputs Ambient Operating Temperature Soldering Temperature Storage temperature Referenced to GND Referenced to GND Max of 10 seconds -65 3 2 -0.5 0
DC CHARACTERISTICS
Operating Voltage, VDD Input High Voltage, VIH Input Low Voltage, VIL Input High Voltage, VIH Input Mid-level Voltage Input Low Voltage, VIL Output High Voltage, VOH Output High Voltage, VOH Output Low Voltage, VOL Operating Supply Current, IDD Short Circuit Current On-Chip Pull-up Resistor Input Capacitance Pins 6, 16, 20, 24, 27 Pins 6, 16, 20, 24, 27 Pins 1, 9, 28 Pins 1, 9, 28 Pins 1, 9, 28 IOH=-4mA IOH=-25mA IOL=25mA No Load Each output Pins 6, 16, 20, 24, 27 All inputs but X1
VDD-0.5 Leave pin unconnected or tri-stated 0.5 VDD-0.4 2.4 0.4 TBD ±70 250 7 14.31818
AC CHARACTERISTICS
Input Frequency Output Clock Rise Time Output Clock Fall Time Output Clock Duty Cycle Absolute Jitter 0.8 to 2.0V 2.0 to 0.8V at VDD/2 TBD TBD 55
45
49 to 51 TBD
Note: 1. Stresses beyond those listed under Absolute Maximum Ratings could cause permanent damage to the device. Prolonged exposure to levels above the operating limits but below the Absolute Maximums may affect device reliability.
External Components
The ICS620-01 requires some inexpensive external components for proper operation. Decoupling capacitors of 0.1µF should be connected on VDD pins 5, 7+8, and 21 to ground, as close to the ICS620-01 as possible. A series termination resistor of 33 should be used for each clock output. The 14.31818 MHz crystal should be parallel resonant with an accuracy of 30ppm or better. For tuning, the formula 2·(CL -6) gives the value of each capacitor that should be connected between X1 and ground and X2 and ground, where C L = the crystal load (or "correlation") capacitance.
MDS 620-01 B
3
Revision 072098
Printed 12/4/00
Integrated Circuit Systems · 1271 Parkmoor Ave.·San Jose·CA·95126·(408)295-9800tel·(408)295-9818fax
PRELIMINARY INFORMATION
I C R O C LO C K
ICS620-01 Digital Still Camera Clock Source
Package Outline and Package Dimensions 28 pin SSOP
Inches Symbol Min 0.061 0.008 0.007 0.385 0.150 0.230 Max 0.068 0.012 0.010 0.400 0.160 0.245 0.016 0.004 0.01 0.127 Millimeters Min 1.55 0.203 0.190 3.810 5.840 Max 1.73 0.305 0.254 4.064 6.223 0.410 0.254 A b c D E
E
H
9.780 10.160
D Q e c
h x 45° A
H e h Q
.025 BSC
0.635 BSC
b
Ordering Information
Part/Order Number ICS620-01R ICS620-01RT Marking ICS620-01R ICS620-01R Package 28 pin SSOP Add Tape & Reel Temperature 0-70°C -
While the information presented herein has been checked for both accuracy and reliability, ICS Incorporated assumes no responsibility for either its use or for the infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use in normal commercial applications. Any other applications such as those requiring extended temperature range, high reliability, or other extraordinary environmental requirements are not recommended without additional processing by ICS. ICS reserves the right to change any circuitry or specifications without notice. ICS does not authorize or warrant any ICS product for use in life support devices or critical medical instruments.
MDS 620-01 B
4
Revision 072098
Printed 12/4/00
Integrated Circuit Systems · 1271 Parkmoor Ave.·San Jose·CA·95126·(408)295-9800tel·(408)295-9818fax
Others parts begin by 62
62-1
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