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PDF FS8108 Data sheet ( Hoja de datos )

Número de pieza FS8108
Descripción Low Power Phase-Locked Loop IC
Fabricantes Himark 
Logotipo Himark Logotipo



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No Preview Available ! FS8108 Hoja de datos, Descripción, Manual

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FS8108 Low Power Phase-Locked Loop IC
the wireless IC company
HiMARK Technology, Inc. reserves the right to change the product described in this datasheet. All information con-
tained in this datasheet is subject to change without prior notice. HiMARK Technology, Inc. assumes no responsibility
for the use of any circuits shown in this datasheet.
Description
The FS8108 is a serial data input, phase-locked loop IC with programmable input and ref-
erence frequency dividers. When combined with a VCO, the FS8108 becomes the core of
a very low power frequency synthesizer well-suited for mobile communication applica-
tions such as paging systems. The FS8108 includes an 18-bit programmable input fre-
quency divider and also implements a separate pin for stand-by control.
Features
‹ High maximum input operating frequency — 185 MHz at VDD1 = 1.0 V
‹ Up to 22 MHz internal crystal oscillator reference frequency at VDD1 = 1.0 V
‹ Extremely low current consumption (IDD,total typically 0.4 mA at fFIN = 90 MHz)
‹ 18-bit programmable input frequency divider (including a ÷ 64/65 prescaler) with
divide ratio range from 4032 to 262143
‹ 13-bit programmable reference frequency divider (including a ÷ 8 prescaler) with
divide ratio range from 40 to 65528
‹ Optional lock detector output
‹ Charge pump output for passive low-pass filter
‹ Quick-lock signal output for faster locking
‹ Separate pin for stand-by control
‹ TSSOP 16L package (0.65mm pitch)
Applications
‹ Pager
‹ Wireless communication system
Page 1
June 2001

1 page




FS8108 pdf
the wireless IC company
FS8108
Electrical Characteristics
(VDD1 = 0.95 to 2.0 V, VDD2 = 2.7 to 3.3 V, VSS = 0 V, TA = 0 to 60°C unless otherwise noted)
Parameter
Current consumption
Standby current consumption (IDD2)
FIN max. operating frequency
FIN min. operating frequency
XIN max. operating frequency
XIN min. operating frequency
FIN input voltage swing
XIN input voltage swing
CLK, DATA, LE logic LOW input voltage
CLK, DATA, LE logic HIGH input voltage
XIN logic LOW input current
XIN logic HIGH input current
FIN logic LOW input current
FIN logic HIGH input current
DO logic LOW output current
DO logic HIGH output current
LD, FV, FR logic LOW output current
LD, FV, FR logic HIGH output current
DATA to CLK setup time
CLK to LE setup time
Hold time
Symbol
Condition
IDD,total
IDD,standby
fFIN,max
fFIN,min
fXIN,max
fXIN,min
VFIN
VXIN
VIL
VDD1 = 1.0 V, OPR=”H”,
VFIN = 0.3 Vpk-pk sinusoid,
fFIN = 100 MHz,
VXIN = 0.3 Vpk-pk sinusoid,
fXIN = 12.8 MHz
VDD1 = 0 V, OPR=”L”
VFIN = 0.3 Vpk-pk sinusoid
VFIN = 0.3 Vpk-pk sinusoid
VXIN = 0.3 Vpk-pk sinusoid
VXIN = 0.3 Vpk-pk sinusoid
VIH
IIL,XIN
IIH,XIN
IIL,FIN
IIH,FIN
IOL,DOP
IOH,DOP
IOL
IOH
tSU1
tSU2
tHOLD
VIL = 0 V
VIH = VDD1
VIL = 0 V
VIH = VDD1
VOL = 0.4 V
VOH = VDD2 – 0.4 V
VOL = 0.4 V
VOH = VDD2 – 0.4 V
min.
100
22
0.3
0.3
VDD-
0.3
1.0
1.0
0.1
0.1
2
2
2
Value
typ.
0.40
max.
1.10
10
40
7
0.3
10
10
60
60
Unit
mA
µA
MHz
MHz
MHz
MHz
Vpk-pk
Vpk-pk
V
V
µA
µA
µA
µA
mA
mA
mA
mA
µs
µs
µs
Page 5
June 2001

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