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Número de pieza | ICS680-01 | |
Descripción | Networking Clock Synthesizer and Zero Delay Buffer | |
Fabricantes | Integrated Circuit Systems | |
Logotipo | ||
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No Preview Available ! ICS680-01
Networking Clock Synthesizer and Zero Delay Buffer
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Description
Features
The ICS680-01 generates four high-frequency clock
outputs and a reference from a 25 MHz crystal or clock
input. The device includes a low-skew, single input to
four output zero delay clock buffer. It can replace
multiple crystals and oscillators, saving board space
and cost.
The device has a power-down tri-state (PDTS) pin that
place the clock outputs in a high-impedance state when
pulled low. The PDTS pin includes an internal pull-up
resistor.
Block Diagram
• Packaged in 24-pin TSSOP
• Available in Pb (lead) free package
• Replaces multiple crystals and oscillators
• Input crystal or clock frequency of 25 MHz
• Five output driver driven by external clock
• Duty cycle of 45/55
• Operating voltage of 3.3 V
• Advanced, low-power CMOS process
• Fixed output frequencies of 25 MHz and 48 MHz
• Selectable output frequencies of 24 MHz, 48 MHz,
50 MHz and 66.6666 MHz
• Qx outputs replace costly discrete buffer
• Low-skew buffer outputs (250 ps)
VDD
5
S0
S1
25 MHz
Crystal or Clock
X1/ICLK
X2
PLLA
PLLB
PLLC
Crystal
Oscillator
Divide
Logic
and
Output
Enable
Control
CLK1
CLK2
48M
25M
External capacitors
may be required.
QFB
Q0
ICLK
PLL/Buffer
2
GND
PDTS
Q1
Q2
Q3
MDS 680-01 F
1
Revision 020305
Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
1 page ICS680-01
Networking Clock Synthesizer and Zero Delay Buffer
DwwCw.DEatlaeShceettr4iUc.caoml Characteristics
Unless stated otherwise, VDD = 3.3 V ±5%, Ambient Temperature 0 to +70°C
Parameter
Symbol
Conditions
Min.
Operating Voltage
VDD
3.13
Supply Current
IDD No load,PDTS=1
No load,PDTS=0
Input High Voltage, binary
inputs
VIH PDTS, ICLK
2
Input High Voltage, trinary
inputs
VIH S0, S1
VDD-0.5
Input Low Voltage, binary
inputs
VIL PDTS, ICLK
Input Low Voltage, trinary
inputs
VIL S0, S1
Output High Voltage
Output High Voltage
Output Low Voltage
Short Circuit Current
Input Capacitance, Inputs
Nominal Output
Impedance
VOH
VOH
VOL
IOS
CIN
ZOUT
IOH = -4 mA
IOH = -12 mA
IOL = 12 mA
IOL = 4 mA
CLK output
VDD-0.4
2.4
On-Chip Pull-up Resistor,
Inputs
RPU PDTS, SEL
On-Chip Pull-down
Resistor, Outputs
RPD CLK outputs
Typ.
3.3
32
300
±50
5
20
250
250
Max.
3.46
Units
V
mA
µA
V
V
0.8 V
0.5 V
V
V
0.8 V
0.4 V
mA
pF
Ω
kΩ
kΩ
MDS 680-01 F
5
Revision 020305
Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
5 Page |
Páginas | Total 8 Páginas | |
PDF Descargar | [ Datasheet ICS680-01.PDF ] |
Número de pieza | Descripción | Fabricantes |
ICS680-01 | Networking Clock Synthesizer and Zero Delay Buffer | Integrated Circuit Systems |
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