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參數(shù)資料
| 型號： | L3000S |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | SLIC Kit Optimized for Applications with Both First and Second Generation Combos(用于短波/超短波通信系統(tǒng)的用戶線接口) |
| 中文描述： | 用戶接口工具包優(yōu)化與包括第一代和第二代功放音箱（用于短波/超短波通信系統(tǒng)的用戶線接口應(yīng)用） |
| 文件頁數(shù)： | 13/32頁 |
| 文件大?。?/td> | 298K |
| 代理商： | L3000S |
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It is possibleto do it because :
When the CS = + 5V the output pins (ONHK,
GDK) are in high impedancecondition (> 100K
).
The signals present at the input pins are not
transferedinto the SLIC.
When the CS = 0V the output pins change in
functionof the values of the line current (I
line
) and
the longitudinal current (I
GDK
). The operating
status of the SLIC are set by the voltage applied
to the inputpins.
The rising edge of the CS signal latches the sig-
nal applied to the input pins. The status of the
SLIC will not change until the CS signal will be
again equal to zero.
See timings fig 7 & 8.
An additional input pin MR (MasterReset) can be
useful during the system start up phase or in
emergencycondition.
In fact when this pin is set to ”0” the SLIC will be
set in POWER DOWN MODE. This pin has an in-
ternalpull-up resistor of about 200K
EXTERNALCOMPONENTS LIST
To set up the SLIC kit into operation,the following
parametershave to be defined :
- The DC feeding resistance RFS, defined as
the resistance of each side of the tradi-
tional feeding system (most common value
for RFS are 200, 400 or 500).
- The AC input/outputSLIC impedance at line
terminals, ZML, to which the return loss
measurement is refered. It can be real
(typically 600
) or complex.
- The equivalent AC impedance of the line
Zline used for evaluation of the trans-hy-
brid loss (2/4 wire conversion). It is usually
a compleximpedance.
- The frequencyof the ringing signal Fr (SLIC
can work with this frequency ranging from
16 to 68Hz).
- The value of the two resistors RP in series
with the line terminals ; main purpose of
the a.m. resistors is to allow primary pro-
tection to fire..
With these assumptions the following compo-
nentslist is defined:
Figure 7:
Typical Application Circuit
L3000S
L3000S - L3092
13/32
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