參數(shù)資料
型號： L9218A
英文描述： CAP CER 330PF 3.15KVDC R3 RAD
中文描述： 低成本線接口
文件頁數(shù)： 20/30頁
文件大?。?/td> 378K
代理商： L9218A
20
Agere Systems Inc.
Data Sheet
November 2001
L9218A/G Low-Cost Line Interface
Applications
(continued)
dc Applications
(continued)
Loop Range
The equation below can be rearranged to provide the loop range for a required loop current:
Off-Hook Detection
The loop closure comparator has built-in longitudinal rejection, eliminating the need for an external 60 Hz filter. The
loop closure detection threshold is set by resistor R
LCTH
. The supervision output bit NSTAT is high in an on-hook
condition. The off-hook comparator goes low during an off-hook condition:
I
TR
(mA) = 0.4167 R
LCTH
(k
) – 1.9 mA ACTIVE off-hook to on-hook
I
TR
(mA) = 0.4167 R
LCTH
(k
) + 2.7 mA SCAN on-hook to off-hook
Figure 14. Off-Hook Detection Circuit
R
L
----------------------------
I
L
2R
P
–
R
DC
–
=
R
L
ITR
R
P
R
P
RING
–
+
–
+
DCOUT
R
LCTH
LCTH
NSTAT
TIP
0.125 V/mA
0.05 mA
12-2553 (F).f
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L9219A 制造商:AGERE 制造商全稱:AGERE 功能描述:Low-Cost Line Interface with Reverse Battery and Dual Current Limit
L9222 功能描述:功率驅(qū)動器IC Quad Inv Tran Switch RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
L9222_04 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:QUAD INVERTING TRANSISTOR SWITCH
L9222D 功能描述:功率驅(qū)動器IC Quad Inv Tran Switch RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube
L9222-D 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:QUAD INVERTING TRANSISTOR SWITCH
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