421G-05LFT [IDT]
PLL Based Clock Driver, 421 Series, 3 True Output(s), 0 Inverted Output(s), PDSO8, 0.173 INCH, LEAD FREE, TSSOP-8;
| 型号： | 421G-05LFT |
| 厂家： | 
INTEGRATED DEVICE TECHNOLOGY |
| 描述： | PLL Based Clock Driver, 421 Series, 3 True Output(s), 0 Inverted Output(s), PDSO8, 0.173 INCH, LEAD FREE, TSSOP-8 驱动 光电二极管 输出元件 逻辑集成电路 |
| 文件： | 总6页 (文件大小：167K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DATASHEET
DIGITAL VIDEO CAMERA CLOCK
ICS421-05
Description
Features
The ICS421-05 is a low-power, low-jitter clock
synthesizer developed for digital camera applications.
The device accepts a 27 MHz input clock to support
common digital video camera interface frequencies
including a 12 MHz for USB, 24.576 MHz for
IEEE1394, and a 72 MHz CCD clock. Power
consumption was minimized by lowering the voltage
requirement to 1.8 V minimum.
• Ultra-low operating voltage from 1.8 V to 2.4 V
• 10 mA supply current
• 27 MHz input clock frequency
• Fixed 24.576 MHz clock supports IEEE1394
• Fixed 12 MHz clock supports USB
• Fixed 72 MHz CCD clock
• Packaged in 8-pin TSSOP (Pb free)
The ICS421-05 utilizes a small form factor 8-pin
TSSOP package.
ICS is a leader in low power, consumer application
clock sources. Devices are capable of supporting CCD,
video, audio, USB, CPU, and other peripherals.
Block Diagram
VDD
2
IEEE
24.576M
PLL
27 MHz
Input Clock
Clock
Buffer
CLKIN
72M
12M
CCD/
USB
PLL
1
OE_USB
GND
IDT™ / ICS™ DIGITAL VIDEO CAMERA CLOCK
1
ICS421-05
REV B 072304
ICS421-05
DIGITAL VIDEO CAMERA CLOCK
CLOCK SYNTHESIZER
OE_USB Operation Table
Pin Assignment
OE_USB
Function
Output tri-state
Output running
CLKIN
VDD
1
2
3
4
8
7
6
5
OE_USB
12M
0
1
GND
VDD
24.576M
72M
8 pin (173 mil) TSSOP
Pin Descriptions
Pin
Pin
Pin
Pin Description
Number
Name
Type
1
2
3
CLKIN
VDD
Input
27 MHz single ended clock input.
Power Connect to voltage supply.
Power Connect to ground.
GND
4
5
6
7
8
24.576M
72M
Output 24.576 MHz clock output.
Output 72 MHz clock output for CCD.
Power Connect to voltage supply.
Output 12 MHz clock output for USB.
VDD
12M
OE_USB
Input
Output enable for 12M clock for USB. See table for functionality,
internal pull-down.
External Components
1) The 0.01µF decoupling capacitor should be mounted
on the component side of the board as close to the VDD
Series Termination Resistor
Clock output traces over one inch should use series
termination. To series terminate a 50Ω trace (a
commonly used trace impedance), place a 33Ωresistor
in series with the clock line, as close to the clock output
pin as possible. The nominal impedance of the clock
output is 20Ω.
pin as possible. No vias should be used between
decoupling capacitor and VDD pin. The PCB trace to
VDD pin should be kept as short as possible, as should
the PCB trace to the ground via. Distance of the ferrite
bead and bulk decoupling from the device is less
critical.
Decoupling Capacitor
2) To minimize EMI, the 33Ωseries termination resistor
As with any high-performance mixed-signal IC, the
ICS421-05 must be isolated from system power supply
noise to perform optimally.
(if needed) should be placed close to the clock output.
3) An optimum layout is one with all components on the
same side of the board, minimizing vias through other
signal layers (the ferrite bead and bulk decoupling
capacitor can be mounted on the back). Other signal
traces should be routed away from the ICS421-05. This
includes signal traces just underneath the device, or on
layers adjacent to the ground plane layer used by the
device.
A decoupling capacitor of 0.01µF must be connected
between VDD and the PCB ground plane.
PCB Layout Recommendations
For optimum device performance and lowest output
phase noise, the following guidelines should be
observed.
IDT™ / ICS™ DIGITAL VIDEO CAMERA CLOCK
2
ICS421-05
REV B 072304
ICS421-05
DIGITAL VIDEO CAMERA CLOCK
CLOCK SYNTHESIZER
Absolute Maximum Ratings
Stresses above the ratings listed below can cause permanent damage to the ICS421-05. These ratings,
which are standard values for ICS commercially rated parts, are stress ratings only. Functional operation of
the device at these or any other conditions above those indicated in the operational sections of the
specifications is not implied. Exposure to absolute maximum rating conditions for extended periods can
affect product reliability. Electrical parameters are guaranteed only over the recommended operating
temperature range.
Item
Rating
Supply Voltage, VDD
All Inputs and Outputs
-0.5 V to 7 V
-0.5 V to VDD +0.5 V
0 to +70 °C
-65 to +150 ° C
125 °C
Ambient Operating Temperature
Storage Temperature
Junction Temperature
Soldering Temperature
260 °C
Recommended Operating Conditions
Parameter
Min.
Typ.
Max.
+70
Units
° C
Ambient Operating Temperature
0
–
Power Supply Voltage (measured in respect to GND)
+1.8
+2.4
V
DC Electrical Characteristics
VDD = 1.8 V to 2.4 V, Ambient Temperature 0 to +70°C, unless stated otherwise
Parameter
Symbol
Conditions
Min.
1.80
Typ.
Max.
Units
Operating Voltage
VDD
2.40
VDD/2-0.5
TBD
V
V
V
V
V
V
Input High Voltage
Input Low Voltage
Input High Voltage
Input Low Voltage
Output High Voltage
V
CLKIN
VDD/2+0.5
IH
V
CLKIN
IL
V
OE_USB pin
OE_USB pin
VDD = 2.4 V,
TBD
1.9
IH
V
IL
V
OH
I
= -4 mA
OH
Output Low Voltage
Output High Voltage
Output Low Voltage
Operating Supply Current
V
VDD = 2.4 V,
= 4 mA
0.4
0.4
V
V
OL
I
OL
V
VDD = 1.8 V
= -4 mA
1.4
OH
I
OH
V
VDD = 1.8 V
= 4 mA
V
OL
I
OL
IDD
No load, 3 out
10
mA
IDT™ / ICS™ DIGITAL VIDEO CAMERA CLOCK
3
ICS421-05
REV B 072304
ICS421-05
DIGITAL VIDEO CAMERA CLOCK
CLOCK SYNTHESIZER
Parameter
Symbol
Conditions
Min.
Typ.
50
Max.
Units
mA
W
Short Circuit Current
I
Each output
OS
Nominal Output Impedance
On-chip Pull-down Resistor
Z
20
o
OE_USB
150
kΩ
Notes: 1. Nominal switching threshold is VDD/2
AC Electrical Characteristics
VDD = 1.8 V to 2.4 V, Ambient Temperature 0 to +70°C, unless stated otherwise
Parameter
Symbol
Conditions
Min.
Typ. Max. Units
Input Frequency
Clock Input
27
MHz
ns
Output Rise Time
Output Fall Time
Output Rise Time
Output Fall Time
t
VDD=2.4 V, 20% to
1.8
OR
80%, C =10 pF
L
t
VDD=2.4 V, 80% to
1.8
2.5
2.5
ns
ns
ns
OF
OR
20%, C =10 pF
L
t
VDD=1.8 V, 20% to
80%, C =10 pF
L
t
VDD=1.8 V, 80% to
OF
20%, C =10 pF
L
Output Clock Duty Cycle
Absolute Pk-Pk Jitter
at VDD/2
50
%
ps
72 MHz output clock
Power OFF to lock
±200
PLL Lock Time within 1%
10
ms
Thermal Characteristics
Parameter
Symbol
Conditions
Min.
Typ. Max. Units
Thermal Resistance Junction to
Ambient
θ
θ
θ
θ
Still air
110
100
80
° C/W
° C/W
° C/W
° C/W
JA
JA
JA
JC
1 m/s air flow
3 m/s air flow
Thermal Resistance Junction to Case
35
Marking Diagram
8
Notes:
5
1. ###### is the lot code.
YYWW
21G5L
######
2. YYWW is the last two digits of the year, and the week
number that the part was assembled.
3. “L” designates Pb (lead) free package.
1
4
IDT™ / ICS™ DIGITAL VIDEO CAMERA CLOCK
4
ICS421-05
REV B 072304
ICS421-05
DIGITAL VIDEO CAMERA CLOCK
CLOCK SYNTHESIZER
Package Outline and Package Dimensions (8-pin TSSOP, 173 Mil. Body)
Package dimensions are kept current with JEDEC Publication No. 95
Millimeters
Min Max
Inches
Max
8
Symbol
Min
--
A
A1
A2
b
--
1.20
0.15
1.05
0.30
0.20
3.10
0.047
0.006
0.041
0.012
0.05
0.80
0.19
0.09
2.90
0.002
0.032
0.007
E1
E
INDEX
AREA
C
0.0035 0.008
0.114 0.122
0.252 BASIC
0.169 0.177
0.0256 Basic
D
E
6.40 BASIC
4.30 4.50
0.65 Basic
1
E1
e
D
L
0.45
0.75
0.018
0.030
α
0°
8°
0°
8°
aaa
--
0.10
--
0.004
A
A2
A1
c
- C -
e
SEATING
PLANE
b
L
aaa C
Ordering Information
Part / Order Number
421G-05LF
Marking
Shipping Packaging
Tubes
Package
8-pin TSSOP
8-pin TSSOP
Temperature
0 to +70 ° C
0 to +70 ° C
21G5L
421G-05LFT
Tape & Reel
“LF” denotes Pb (lead) free package.
While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems (ICS)
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.
IDT™ / ICS™ DIGITAL VIDEO CAMERA CLOCK
5
ICS421-05
REV B 072304
ICS421-05
DIGITAL VIDEO CAMERA CLOCK
CLOCK SYNTHESIZER
Innovate with IDT and accelerate your future networks. Contact:
www.IDT.com
For Sales
800-345-7015
408-284-8200
Fax: 408-284-2775
For Tech Support
<product line email>
<product line phone>
Corporate Headquarters
Integrated Device Technology, Inc.
6024 Silver Creek Valley Road
San Jose, CA 95138
Asia Pacific and Japan
Integrated Device Technology
Singapore (1997) Pte. Ltd.
Reg. No. 199707558G
435 Orchard Road
Europe
IDT Europe, Limited
Prime House
Barnett Wood Lane
Leatherhead, Surrey
United Kingdom KT22 7DE
+44 1372 363 339
United States
800 345 7015
#20-03 Wisma Atria
+408 284 8200 (outside U.S.)
Singapore 238877
+65 6 887 5505
© 2006 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. IDT and the IDT logo are trademarks of Integrated Device
Technology, Inc. Accelerated Thinking is a service mark of Integrated Device Technology, Inc. All other brands, product names and marks are or may be trademarks or registered
trademarks used to identify products or services of their respective owners.
Printed in USA
相关型号：
SI9130DB
5- and 3.3-V Step-Down Synchronous ConvertersWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9135LG-T1
SMBus Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9135LG-T1-E3
SMBus Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9135_11
SMBus Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9136_11
Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9130CG-T1-E3
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9130LG-T1-E3
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9130_11
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9137
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9137DB
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9137LG
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
SI9122E
500-kHz Half-Bridge DC/DC Controller with Integrated Secondary Synchronous Rectification DriversWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
VISHAY
©2020 ICPDF网 联系我们和版权申明