- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄97997 > LC7216M PLL FREQUENCY SYNTHESIZER, 40 MHz, PDSO20 PDF資料下載
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)： | 3/15頁 |
| 文件大?。?/td> | 299K |
| 代理商： | LC7216M |
Structure of the General-Purpose Counter
The LC7216M general-purpose counter is a 20-bit binary counter.
The value of the counter can be read out, msb first, from the DO pin.
When the general-purpose counter is used for frequency measurement, GT selects the measurement period to be one of
two periods, 60 or 120 ms. The frequency of the signal input to the HCTR or LCTR pin can be measured by determining
the number of pulses input to the general-purpose counter during the measurement period.
When the general-purpose counter is used for period measurement, the period of the signal input to the LCTR pin can be
measured by determining the number of check signal (900 kHz) cycles input to the general-purpose counter during one
or two periods of the signal input to the LCTR pin.
The general-purpose counter is started by setting CTEN to 1 in the serial data. While the serial data is acquired internally
in the LC7216M at the point the CE signal goes from high to low, the input to the HCTR or LCTR pin must be provided
within 10 ms after CE goes low.
No. 3355-11/15
LC7216M
Item
Xtal
7.2 MHz
3.6 MHz
Frequency measurement period
120/60 ms
240/120 ms
Frequency measurement check signal
900 kHz
450 kHz
Reference frequencies
100, 50, 25, ......... 10, 9, 5, 1 kHz
50, 25, 12, 5, .......... 5, 4.5, 2.5, 0.5 kHz
Serial data I/O (CL)
t1 ≥ 1.5 s, t3 ≥ 1.5 s
t1 ≥ 3.0 s, t3 ≥ 3.0 s
SC
SF
Input pin
Measurement item
Measurement frequency range
GT (1/0)
S1
1
*
HCTR
Frequency measurement
10 to 60 MHz (sine wave)
120 m/60 ms
S2
01
LCTR
Frequency measurement
15 to 500 kHz (sine wave)
120 m/60 ms
S3
00
LCTR
Period measurement
1 Hz to 20 kHz (pulse wave)
Two periods/one period
Two period/one
period extraction
circuit
Input signal
switching gate
DO pin
Check signal (900 kHz)
General-purpose counter
(20-bit binary counter)
相關PDF資料 |
PDF描述 |
|---|---|
| LCP-10G3A4EDR | FIBER OPTIC TRANSCEIVER, 840-860nm, 10312.5Mbps(Tx), 10312.5Mbps(Rx), SURFACE MOUNT, LC CONNECTOR |
| LCP-10G3A4EDRH | FIBER OPTIC TRANSCEIVER, 840-860nm, 10312.5Mbps(Tx), 10312.5Mbps(Rx), SURFACE MOUNT, LC CONNECTOR |
| LCP-10G3B4QDR | FIBER OPTIC TRANSCEIVER, 1260-1355nm, 10000Mbps(Tx), 10000Mbps(Rx), SURFACE MOUNT, LC CONNECTOR |
| LCP-10G3B4QDRT | FIBER OPTIC TRANSCEIVER, 1260-1355nm, 10000Mbps(Tx), 10000Mbps(Rx), SURFACE MOUNT, LC CONNECTOR |
| LCP-10G3B4QDRH | FIBER OPTIC TRANSCEIVER, 1260-1355nm, 10000Mbps(Tx), 10000Mbps(Rx), SURFACE MOUNT, LC CONNECTOR |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LC7218 | 制造商:Panasonic Industrial Company 功能描述:IC |
| LC72-18 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Laser Diode with Monitor Diode |
| LC72-18G | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Laser Diode with Monitor Diode |
| LC7218JM | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:PLL Frequency Synthesizer for Electronic Tuning in AV Systems |
| LC7218M | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:PLL Frequency Synthesizer for Electronic Tuning in AV Systems |
發(fā)布緊急采購，3分鐘左右您將得到回復。