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PDF ICS252 Data sheet ( Hoja de datos )
| Número de pieza | ICS252 | |
| Descripción | Field Programmable Dual Output SS VersaClock Synthesizer | |
| Fabricantes | Integrated Circuit Systems | |
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ICS252
Field Programmable Dual Output SS VersaClock Synthesizer
Description
Features
The ICS252 is a low cost, dual-output, field
programmable clock synthesizer. The ICS252 can
generate two output frequencies from 314 kHz to 200
MHz using up to two independently configurable PLLs.
The outputs may employ Spread Spectrum techniques
to reduce system electro-magnetic interference (EMI).
Using ICS’ VersaClock™software to configure the PLL
and output, the ICS252 contains a One-Time
Programmable (OTP) ROM to allow field
programmability. Programming features include 4
selectable configuration registers.
The device employs Phase-Locked Loop (PLL)
techniques to run from a standard fundamental mode,
inexpensive crystal, or clock. It can replace multiple
crystals and oscillators, saving board space and cost.
• 8-pin SOIC package
• Two addressable registers
• Input crystal frequency of 5 to 27 MHz
• Clock input frequency of 3 to 150 MHz
• Output clock frequencies up to 200 MHz
• Configurable Spread Spectrum Modulation
• Operating voltage of 3.3 V
• Replaces multiple crystals and oscillators
• Controllable output drive levels
• Advanced, low-power CMOS process
• Available in Pb (lead) free packaging
The device also has a power-down feature that
tri-states the clock outputs and turns off the PLLs when
the PDTS pin is taken low.
The ICS252 is also available in factory programmed
custom versions for high-volume applications.
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Block Diagram
SEL
X1
Crystal
X2
OTP
ROM
with
PLL
Values
Crystal
Oscillator
External capacitors
are required.
VDD
PLL1
PLL2
Divide
Logic
and
Output
Enable
Control
GND
PDTS
CLK1
CLK2
MDS 252 B
1
Revision 011606
Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
www.DataSheet4U.com
1 page  
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ICS252
Field Programmable Dual Output SS VersaClock Synthesizer
DC Electrical Characteristics
Unless stated otherwise, VDD = 3.3V ±5%, Ambient Temperature -40 to +85°C
Parameter
Symbol
Conditions
Min. Typ.
Operating Voltage
VDD
3.135 3.3
Configuration Dependent
- See VersaClockTM
Operating Supply Current
Input High Voltage
Two 33.3333 MHz output,
IDD PDTS = 1, no load
Note 1
16
PDTS = 0
500
Input High Voltage
Input Low Voltage
Input High Voltage, PDTS
Input Low Voltage, PDTS
Input High Voltage
Input Low Voltage
Output High Voltage
(CMOS High)
VIH
VIL
VIH
VIL
VIH
VIL
VOH
SEL
SEL
ICLK
ICLK
IOH = -4 mA
VDD/2+1
VDD-0.5
VDD/2+1
VDD-0.4
Output High Voltage
VOH IOH = -8 mA (Low Drive);
2.4
www.DataSheet4U.comOutput Low Voltage
IOH = -12 mA (High Drive) VDD-0.4
VOL IOL = 8 mA (Low Drive);
IOL = 12 mA (High Drive)
Short Circuit Current
IOS
±70
Nominal Output
Impedance
ZO
20
Internal Pull-up Resistor
Internal Pull-down
Resistor
RPUP
RPD
SEL, PDTS
Clock outputs CLK1 and
CLK2
190
120
Input Capacitance
CIN inputs
4
Max.
3.465
Units
V
mA
mA
0.4
0.4
VDD/2-1
µA
V
V
V
V
V
V
V
V
0.4 V
mA
Ω
kΩ
kΩ
pF
Note 1: Example with 25 MHz crystal input with output of 33.3 MHz, no load, and VDD = 3.3 V.
MDS 252 B
5
Revision 011606
Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
www.DataSheet4U.com
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet ICS252.PDF ] | |
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