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參數(shù)資料
| 型號： | L3030 |
| 廠商： | 意法半導體 |
| 英文描述： | Subscriber Line Interface(用戶線路接口設備) |
| 中文描述： | 用戶線接口（用戶線路接口設備） |
| 文件頁數(shù)： | 14/28頁 |
| 文件大?。?/td> | 374K |
| 代理商： | L3030 |
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2) ParallelMode
This operating mode is enabledconnecting pin 33
to avoltageintherangefrom4Vto5V.Thefivewire
have thefollowing functions:
- power down/feeding(EIA), enteringat pin18
- timing (CI), enteringat pin 26
- ring (DCLK), entering at pin 21
- on-hook/off-hook(NCS), outgoingat pin 19
- ground-key(DIO), outgoingat pin 20
In this operatingmode the signals at theinputs are
immediatelyexecuted,withoutanyexternalclockti-
ming; alltheinternalregistersarebypassed.Thein-
formationssent back on pins19 and 20, displayin
real time the settingof internalcircuits, that means
line status. In the table 2 the correspondencebet-
ween the interface wires in the parallel mode and
equivalentbit in serial mode is pointedout ; where
thereisn’t this correspondence,the internalsetting
is shown.
Table 2 : Parallel Mode.
Pin
Rif.
Meaning (note 1)
Eq. Bit of Ser. Interf.
Value
18
EIA
PD/feeding
BIT0R
0 : High Impedance
1 : Low Impedance
26
CI
Timing
BIT1R
0 : Ring Timing Off
1 : Ring Timing On
21
DCKL
Ring
BIT2R
0 : No Ring
1 : Ring Injection
BIT3R
0 : Low Amplitude
BIT4R
0 : Normal Polarity
BIT5R
0 : Normal Battery
BIT6R
0 :
1 :
Line Curr. = 30mA
BIT7R
19
NCS
On-hook/off-hook
BIT0T
0 : On-hook
1 : Off-hook
20
DIO
Ground Key
BIT1T
1 : Long. Curr. < 17mA
0 : Long. Curr. > 17mA
BIT2T
BIT3T
BIT4T
Note :
1. The description of the commands is referred to thesystem L3030 + LINE INTERFACEmodule.
DIGITAL INTERFACE ELECTRICAL CHARACTERISTICS
(V
DD
= + 5V, V
SS
= – 5V, T
amb
. = 25
o
C) (refer to PLCC44 package)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
STATIC ELECTRICAL CHARACTERISTICS
Vil
Input Voltage at Logical ”0”
Pins 18, 19, 20, 21, 26
0
0.8
V
Vih
Input Voltage at Logical ”1”
2.0
5
V
Iil
Input Current at Logical ”0”
Vil = 0V
200
μ
A
Iih
Input Current at Logical ”1”
Vih = 5V
10
μ
A
Vol
Output Voltage at Logical ”0”
Pins 19, 20 Iout = – 1mA
0.4
V
Voh
Output Voltage at Logical ”1”
Pins 19, 20 Iout = 1mA
2.4
V
Ilk
Tristate Leak. Current
Pin 20 NCS = ”1”
10
μ
A
L3000N - L3030
14/28
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