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參數(shù)資料
| 型號： | L9219A |
| 英文描述： | CAP CER 390PF 3.15KVDC R3 RAD |
| 中文描述： | 低成本線接口，具有反向電池和雙電流限制 |
| 文件頁數(shù)： | 4/30頁 |
| 文件大?。?/td> | 397K |
| 代理商： | L9219A |
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4
Agere Systems Inc.
Data Sheet
November 2001
with Reverse Battery and Dual Current Limit
L9219A/G Low-Cost Line Interface
Pin Information
Figure 2. 28-Pin PLCC
Table 1. Pin Descriptions
PLCC Symbol
1
Type
I
Description
I
PROG
Current-Limit Program Input.
A resistor to DCOUT sets the dc current limit of the
device. The value of current limit set via this resistor may be increased via logic control
(see state table for additional detail).
Polarity Reversal Slowdown.
Connect a capacitor to ground to control the rate of bat-
tery reversal.
Polarity Reversal Slowdown.
Connect a capacitor to ground to control the rate of bat-
tery reversal.
5 V Power Supply.
Receive ac Signal Input (Noninverting).
This high-impedance input controls the ac
differential voltage on tip and ring.
Receive ac Signal Input (Inverting).
This high-impedance input controls the ac differ-
ential voltage on tip and ring.
2
FB2
—
3
FB1
—
4
5
V
CC
RCVP
—
I
6
RCVN
I
VTX
TXI
VITR
NSTAT
NC
RTSP
RCVN
DCOUT
V
BAT
PR
5
6
7
8
9
10
11
4
2
1
28
27
3
12
14
15
16
17
18
13
25
24
23
22
21
20
19
I
P
B
C
P
B
B
B
A
28-PIN PLCC
LCTH
RCVP
CF2
RTSN
T
N
F
F
V
C
26
T
12-3558 (F)
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