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參數(shù)資料
| 型號： | MC145162D1 |
| 廠商： | MOTOROLA INC |
| 元件分類： | XO, clock |
| 英文描述： | CONNECTOR ACCESSORY |
| 中文描述： | PLL FREQUENCY SYNTHESIZER, 85 MHz, PDSO16 |
| 封裝： | SOG-16 |
| 文件頁數(shù)： | 6/24頁 |
| 文件大?。?/td> | 223K |
| 代理商： | MC145162D1 |
MC145162
MC145162–1
6
MOTOROLA
PIN DESCRIPTIONS
INPUT PINS
OSCin
/OSCout
Reference Oscillator Input/Output (Pins 7, 8)
These pins form a reference oscillator when connected to
an external parallel–resonant crystal. Figure 6 shows the
relationship of different crystal frequencies and reference
frequencies for cordless phone applications in various coun-
tries. OSCin may also serve as input for an externally gen-
erated reference signal which is typically ac coupled.
MCUCLK
System Clock (Pin 5)
This output pin provides a signal of the crystal frequency
(OSCout) divided by 3 or 4 that is controlled by a bit in the
control register.
This signal can be a clock source for the MCU or other sys-
tem clocks.
ADin, Din, CLK, ENB
Auxiliary Data In, Data In, Clock, Enable (Pins 2, 3, 1, 4)
These four pins provide an MCU serial interface for pro-
gramming the reference counter, the transmit–channel count-
er, and the receive–channel counter. They also provide
various controls of the PLL including the power saving mode
and the programming format.
TxPS/fTx, RxPS/fRx
Transmit Power Save, Receive Power Save (Pins 13, 11)
For a normal application, these output pins provide the
status of the internal power saving mode operation. If the
transmit–channels counter circuitry is in power down mode,
TxPS/fTx outputs a high state. If the receive–channels
counter circuitry is in power down mode, RxPS/fRx is set high.
These outputs can be applied for controlling the external pow-
er switch for the transmitter and the receiver to save MCU
control pins.
In the Tx/Rx channel counter test mode, the TxPS/fTx and
RxPS/fRx pins output the divided value of the transmit
channel counter (fTx) and the receive channel counter (fRx),
respectively. This test mode operation is controlled by the
control register. Details of the counter test mode are in the
Tx/
Rx Channel Counter Test
section of this data sheet.
fin–T/fin–R
Transmit/Receive Counter Inputs (Pins 14, 9)
fin–T and fin–R are inputs to the transmit and the receive
counters, respectively. These signals are typically driven from
the loop VCO and ac coupled. The minimum input signal level
is 200 mV p–p @ 60.0 MHz.
OUTPUT PINS
TxPDout/RxPDout
Transmit/Receive Phase Detector Outputs (Pins 15, 10)
These are three–state outputs of the transmit and receive
phase detectors for use as loop error signals (see Figure 7 for
phase detector output waveforms). Phase detector gain is
VDD/4
π
volts per radian.
Frequency fV > fR or fV leading: output = negative pulse.
Frequency fV < fR or fV lagging: output = positive pulse.
Frequency fV = fR and phase coincidence: output = high–
impedance state.
NOTE: fR is the divided–down reference frequency at the
phase detector input and fV is the divided–down VCO
frequency at the phase detector input.
LD
Lock Detect (Pin 16)
The lock detect signal is associated with the transmit loop.
The output at a high level indicates an out–of–lock condition
(see Figure 7 for the LD output waveform).
POWER SUPPLY
VDD
Positive Power Supply (Pin 12)
VDD is the most positive power supply potential ranging
from 2.5 to 5.5 V with respect to VSS.
VSS
Negative Power Supply (Pin 6)
VSS is the most negative supply potential and is usually
connected to ground.
M (14 BITS)
OSCout
OSCin
D
C
B
A
fR2
fR1
N (12 BITS)
4
25
Crystal
N Value
fR1
→
B
6.25 kHz
fR2
→
C
1.0 kHz
11.150 MHz
446
11.150 MHz
223
12.5 kHz
10.240 MHz
512
5.0 kHz
12.000 MHz
600
5.0 kHz
Figure 6. Reference Frequencies for Cordless Phone Applications of Various Countries
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