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參數(shù)資料
| 型號： | LC7216M |
| 元件分類： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 40 MHz, PDSO20 |
| 封裝： | MINI, FP-20 |
| 文件頁數(shù)： | 12/15頁 |
| 文件大?。?/td> | 299K |
| 代理商： | LC7216M |
Continued from preceding page.
Note: *1. Since the output port states are undefined when power is first applied, transfer the control data quickly.
*2. The high and low level input voltages for the CE, CL, DI, IN0 and IN1 pins are VIH = 2.2 to 6.5 V and VIL = 0 to 0.7 V, regardless of the power
supply voltage VDD.
Control Data Format (serial input data)
No. 3355-6/15
LC7216M
Pin No.
Symbol
I/O
Type
Function
10
11
12
13
14
6
7
14
13
OUT1
OUT2
OUT3
OUT4
OUT5
IN0
IN1
HCTR
LCTR
Output*1
Input*2
Input
Output port
Input port
General-purpose
counter
Frequency
measurement signal
input pin
General-purpose
counter
Frequency or period
measurement signal
input pin
These pins latch bits O1 to O5 in the serial data transferred from the controller, invert
that data and output the inverted data in parallel.
OUT1 and OUT2 are complementary outputs.
OUT3, OUT4, and OUT5 are N-channel open drain outputs that can handle up to 13 V.
The values of the IN0 and IN1 input ports can be converted from parallel to serial and
output from the DO output pin.
HCTR is selected when SC in the serial input data is set to 1.
Input frequency range: 10 to 60 MHz (70 mVrms minimum)
The signal is supplied to a general-purpose 20-bit binary counter after passing through a
divide-by-eight circuit. Therefore, the value of the counter is 1/8 of the frequency actually
input to HCTR.
When HCTR is selected the LC7216M will function in frequency measurement mode
and the measurement period can be selected to be either 60 or 120 ms. (GT = 0: 60 ms,
1: 120 ms)
The result of the measurement (the value of the general-purpose counter) can be output
MSB first from the DO output pin.
LCTR is selected when SC in the serial input data is set to 0.
When SF in the serial input data is set to 1:
— Frequency measurement mode is selected.
— Input frequency range: 15 to 500 kHz (70 mVrms minimum).
— The signal is supplied directly to the general-purpose counter without passing
through the internal divide-by-eight circuit.
— The measurement period is the same as for HCTR.
When SF in the serial input data is set to 0:
— Period measurement mode is selected.
— Input frequency range: 1 Hz to 20 kHz (VIH = 0.7 VDD minimum, VIL = 0.3VDD
maximum)
— The measurement can be selected to be for one or two cycles. If two cycle
measurement is selected the input frequency range becomes 2 Hz to 20 kHz.
(GT = 0: one cycle, 1: two cycles)
Measurement results are output in the same manner as HCTR measurement results.
Input starting
with D0.
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| LC7218 | 制造商:Panasonic Industrial Company 功能描述:IC |
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