- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄359234 > MT9040AN (ZARLINK SEMICONDUCTOR INC) T1/E1 Synchronizer PDF資料下載
參數(shù)資料
| 型號： | MT9040AN |
| 廠商： | ZARLINK SEMICONDUCTOR INC |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | T1/E1 Synchronizer |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PDSO48 |
| 封裝： | 0.300 INCH, MO-118AA, SSOP-48 |
| 文件頁數(shù)： | 12/27頁 |
| 文件大?。?/td> | 424K |
| 代理商： | MT9040AN |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁當前第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁
MT9040
Data Sheet
12
Zarlink Semiconductor Inc.
Reset Circuit
A simple power up reset circuit with about a 50us reset low time is shown in Figure 7. Resistor R
P
is for protection
only and limits current into the RST pin during power down conditions. The reset low time is not critical but should
be greater than 300ns.
Figure 7 - Power-Up Reset Circuit
Lock Indicator
The LOCK pin toggles at a random rate when the PLL is frequency locked to the input reference. In Figure 8 the
RC-time-constant circuit can be used to hold the high state of the LOCK pin.
Once the PLL is frequency locked to the input reference, the minimum duration of LOCK pin’s high state would be
32ms and the maximum duration of LOCK pin’s low state would not exceed 1 second. The following equations can
be used to calculate the charge and discharge times of the capacitor.
t
C
= - R
D
C ln(1 – V
T+
/V
DD
) = 240
μ
s
t
C
= Capacitor’s charge time
R
D
= Dynamic resistance of the diode (100
)
C = Capacitor value (1
μ
F)
V
T+
= Positive going threshold voltage of the
Schmitt Trigger (3.0 V)
V
DD
= 3.3 V
t
D
= - R C ln(V
T-
/V
DD
) = 1.65 seconds
t
D
= Capacitor’s discharge time
R = Resistor value (3.3 M
)
C = Capacitor value (1
μ
F)
V
T-
= Negative going threshold voltage of the
Schmitt Trigger (2.0 V)
V
DD
= 3.3 V
+3.3V
RST
R
P
1k
C
10nF
R
10k
MT9040
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MT9043 | T1/E1 System Synchronizer |
| MT9043AN | T1/E1 System Synchronizer |
| MT9043AN48PINSSOP | T1/E1 System Synchronizer |
| MT9045 | T1/E1/OC3 System Synchronizer |
| MT9045AN | T1/E1/OC3 System Synchronizer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MT9040AN1 | 制造商:Microsemi Corporation 功能描述:FRAMER E1 /T1 3.3V 48SSOP - Rail/Tube |
| MT9040ANR1 | 制造商:Microsemi Corporation 功能描述:FRAMER E1 /T1 3.3V 48SSOP - Tape and Reel |
| MT9041 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:Multiple Output Trunk PLL |
| MT9041AP | 制造商:Microsemi Corporation 功能描述:WAN/PLL 制造商:Zarlink Semiconductor Inc 功能描述:WAN/PLL |
| MT9041B | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:T1/E1 System Synchronizer |
發(fā)布緊急采購，3分鐘左右您將得到回復。