MC12179D View Datasheet(PDF) - LANSDALE Semiconductor Inc.
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MC12179D Datasheet PDF : 11 Pages
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ML12179
LANSDALE Semiconductor, Inc.
ELECTRICAL CHARACTERISTICS (VCC = 4.5 to 5.5 V; VP = VCC to 5.5 V; TA = –40 to 85 C, unless otherwise noted.)
Characteristic
Symbol
Min
Ty p
Max
Unit
Condition
Supply Current for VCC
Supply Current for VP
Operating Frequency
ICC
–
3.1
IP
–
0.4
fINmax
FIN
2800
–
fINmin
–
–
5.6
mA Note 1
1.3
mA Note 1
–
MHz Note 2
500
Operating Frequency
Crystal Mode FOSC
5
External Oscillator OSCin
2
–
11
MHz Note 3
–
11
Note 4
Input Sensitivity
Fin
VIN
200
–
1000
mVP–P Note 2
Input Sensitivity
External Oscillator OSCin VOSC
500
–
2200
mVP–P Note 4
Output Source Current5
(PDout)
IOH
–2.8
–2.2
–1.6
mA VP = 4.5 V, VPDout
= VP/2
Output Sink Current5
(PDout)
IOL
1.6
2.2
2.8
mA VP = 4.5 V, VPDout
= VP/2
Output Leakage Current
(PDout)
IOZ
–
0.5
15
NOTES: 1. VCC and VP = 5.5 V; FIN = 2.56 GHz; FOSC = 10 MHz crystal; PDout open.
2. AC coupling, FIN measured with a 1000 pF capacitor.
3. Assumes C1 and C2 (Figure 1) limited to 30 pF each including stray and parasitic capacitances.
4. AC coupling to OSCin.
5. Refer to Figure 15 and Figure 16 for typical performance curves over temperature and power supply voltage.
nA VP = 5.0 V, VPDout
= VP/2
PIN FUNCTION DESCRIPTION
Pin
Symbol
I/O
Function
1
OSCin
I
Oscillator Input – An external parallel–resonant, fundamental crystal is connected between OSC in
and OSCout to form an internal reference oscillator (crystal mode). External capacitors C1 and C2, as
shown in Figure 1, are required to set the proper crystal load capacitance and oscillator frequency.
For an external reference oscillator, an external signal is AC–coupled to the OSCin pin with a
1000 pF coupling capacitor, with no connection to OSCout. In either mode, a resistor with a nominal
value of 50 kΩ MUST be placed across the OSCin and OSCout pins for proper operation.
2
VCC
–
Positive Power Supply. Bypass capacitors should be placed as close as possible to the pin and be
connected directly to the ground plane.
3
Gnd
–
Ground.
4
Fin
I
Prescaler Input – The VCO signal is AC coupled into the Fin pin.
5
GndP
–
Ground – For charge pump circuitry .
6
PDout
O
Single ended phase/frequency detector output (charge pump output). Three–state current
sink/source output for use as a loop error signal when combined with an external low pass filter. The
phase/frequency detector is characterized by a linear transfer function.
7
VP
–
Positive power supply for charge pump. VP MUST be equal or greater than VCC. Bypass capacitors
should be placed as close as possible to the pin and be connected directly to the ground plane.
8
OSCout
O
Oscillator output, for use with an external crystal as shown in Figure 1.
Page 2 of 11
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