參數(shù)資料
型號(hào)： LUCL9219GAR-DT
英文描述： Low-Cost Line Interface with Reverse Battery and Dual Current Limit
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(yè)數(shù)： 25/30頁(yè)
文件大?。?/td> 397K
代理商： LUCL9219GAR-DT
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
Type
Description
1
IPROG
I
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).
2
FB2
—
Polarity Reversal Slowdown. Connect a capacitor to ground to control the rate of bat-
tery reversal.
3
FB1
—
Polarity Reversal Slowdown. Connect a capacitor to ground to control the rate of bat-
tery reversal.
4
VCC
—
5 V Power Supply.
5
RCVP
I
Receive ac Signal Input (Noninverting). This high-impedance input controls the ac
differential voltage on tip and ring.
6
RCVN
I
Receive ac Signal Input (Inverting). This high-impedance input controls the ac differ-
ential voltage on tip and ring.
VTX
TXI
VITR
NSTAT
NC
RTSP
RCVN
DCOUT
VBAT
PR
5
6
7
8
9
10
11
42
1
28
27
3
12
14
15
16
17
18
13
25
24
23
22
21
20
19
IPR
O
G
B0
CF1
PT
BG
ND
B1
B2
AG
ND
28-PIN PLCC
LCTH
RCVP
CF2
RTSN
TS
D
NC
FB
2
FB
1
V
CC
26
TG
28-PIN PLCC
12-3558 (F)
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