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参数资料
| 型号： | LC72146M |
| 厂商： | SANYO SEMICONDUCTOR CO LTD |
| 元件分类： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 40 MHz, PDSO24 |
| 封装： | MFP-24 |
| 文件页数： | 8/22页 |
| 文件大小： | 157K |
| 代理商： | LC72146M |
Note: * CTC = 0: 40 mVrms
CTC = 1: 70 mVrms
However, the frequency ranges will be as follows when CTC is 1.
HCTR: 8 to 12 MHz, LCTR: 400 to 500 kHz
Integrating Count
Note: CTE: 0
→
General-purpose counter reset
1
→
General-purpose counter start
Restarts on a new 1 setting
In integrated count mode, the count value is accumulated in the general-purpose counter.
Care is required to handle counter overflow.
Counter values: 0H to FFFFFH (1,048,575)
To implement the integrating count operation leave CTE set to 1. When the serial data (IN1) is transmitted again, the general-purpose counter will
start to measure the input again and the result will be added to the count.
No. 4922-16/22
LC72146, 72146M, 72146V
CTS1
CTS0
Input pin
Measurement mode
Frequency range
Input sensitivity
S1
1
—
HCTR
Frequency
0.4 to 25.0 MHz
40 mVrms*
S2
0
1
LCTR
Frequency
10 to 500 kHz
40 mVrms*
S3
0
LCTR
Period
1.0 to 20
× 103 Hz
(pulse)
GT1
GT0
Frequency measurement mode
Period measurement
Measurement time (ms)
Wait time (ms)
mode
0
4
3 to 4
One period
0
1
8
1
0
32
7 to 8
Two periods
1
64
CE
HCTR
LCTR
Frequency
Measurement
time
Wait time
Measurement
time
One period
VDD
VSS
Period
Measurement
time
900 kHz (check signal)
At least 40 mVrms*
(during frequency
measurement)
CTC = 0 : 40 mVrms
CTC = 1 : 70 mVrms
Note: *
However, the frequency
ranges will be as follows
when CTC is 1.
HTCR : 8 to 12 MHz,
LCTR : 400 to 500 kHz
2.2 V (min)
0.8 V (max)
(during period measurement)
Signal input
CE
GT
end-UC
(DO)
General-purpose
counter
Count complete
Internal data
latch (CTE)
CTE = 1
CTE = 0
Start
(Integration)
Restart
Reset
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