參數(shù)資料
型號(hào)： L3845D
廠商： 意法半導(dǎo)體
英文描述： TRUNK INTERFACE
中文描述： 中繼接口
文件頁數(shù)： 3/7頁
文件大?。?/td> 57K
代理商： L3845D
DC ELECTRICAL CHARACTERISTICS
(I
L
= 10 mA to 100 mA, R
1
= 56
, S
1
= Open, T
amb
= + 25
°
C,
unless otherwisespecified)
Symbol
V
L
Parameter
Test Condition
PULSE = Open
IL = 10 mA
I
L
= 20 mA
I
L
= 100 mA
PULSE = V
–
I
L
= 20 mA
I
L
= 35 mA
I
L
= 80 mA
Min.
Typ.
Max.
Unit
Line Voltage
(normal mode)
5
6
12
V
V
V
V
LP
Line Voltage
(pulse mode)
4
5.5
9.5
9.5
V
V
V
I
hn
ON/OFF-Hook
Line Current Detection
Threshold
OFF/ON-Hook
Line Current Detection
Threshold
OFF-Hook
Output Drive Current at Pin
HDO
Pulse Input Low Voltage
Pull-up Input Current at Pin
PULSE (pulse mode)
Imput Current at Pin Pulse
(normal mode)
6.5
mA
I
hf
5
9.2
mA
I
OUT
IL = 10 mA
I
L
≥
20 mA
1.5
2
mA
mA
V
PM
I
PM
0.8
20
V
μ
A
IL = 100 mA
Pulse = V
–
I
NM
3
μ
A
AC ELECTRICAL CHARACTERISTICS
(I
L
= 10mA to 100mA, R
1
= 56
, R
2
= 470K
, R
3
= 130 K
,
T
amb
= + 25
°
C, unlessotherwise specified)
Symbol
Z
L
Parameter
Test Condition
S
1
= Open, S
2
= Open
C
1
= 2.2mF
f = 1KHz
S
1
= Open, S
2
= Open
f = 1KHz
V
AC-L
= 775mVrms
I
L
= 15 to 100mA
S
1
= Closed; S
2
= Open
V
AC-L
= 1.3Vrms
S
1
= Open; S
2
= Closed
V
AC-L
= 1.9Vrms
Min.
Typ.
Max.
Unit
AC Line Impedance
20
K
Sending/Receiving Distortion
2
%
Sending/Receiving Distortion
2
%
%
Sending/Receiving Distortion
2(*)
(*) Not tested,guaranteed only by design.
APPLICATION INFORMATION
With the use of this circuit it is possible to termi-
nate an analog trunk so that all the DC current
component is flowing in the TRUNK TERMINA-
TION CIRCUIT while the AC component is de-
coupled with a low voltage capacitor and can be
used with a small and low cost audio coupler
transformer to provide the AC balancing termina-
tionand two to four wire conversion.
Therefore it is usefull both for MODEM and PABX
systems.
Figure 1 gives the typical application circuit ; it is
worth to note that the TRUNK TERMINATION
CIRCUIT, togetherwith the LS5018transient sup-
pressor provides a compact and low cost module
fully protected against lightning or overvoltages
frequentlypresenton telephonelines.
The PULSE input when connected to V- allows
the device to reduce the Line Voltage and to
show a resistive impedance equal to R1 to the
line. When PULSE input is left open, this function
is disable.
L3845
3/7
相關(guān)PDF資料
PDF描述
L387 VERY LOW DROP 5V REGULATOR WITH RESET
L3916A SPEECH AND 14 MEMORY DIALER WITH LED DRIVER
L3916AD SPEECH AND 14 MEMORY DIALER WITH LED DRIVER
L3926A Speech and 14 Memory Dialer With LED Driver(語音電路和14個(gè)存儲(chǔ)器的撥號(hào)器帶LED驅(qū)動(dòng)器)
L3936A Speech and 14 Memory Dialer With LED Driver(語音電路和14個(gè)存儲(chǔ)器的撥號(hào)器帶LED驅(qū)動(dòng)器)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L3845D1 功能描述:電信集成電路 Analog Trunk Intrfc RoHS:否 制造商:STMicroelectronics 類型:Telecom IC - Various 工作電源電壓:4.75 V to 5.25 V 電源電流: 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-100 封裝:Tray
L3845D1013TR 功能描述:電信集成電路 Analog Trunk Intrfc RoHS:否 制造商:STMicroelectronics 類型:Telecom IC - Various 工作電源電壓:4.75 V to 5.25 V 電源電流: 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-100 封裝:Tray
L38512-ADJ 制造商:Texas Instruments 功能描述:
L-386 制造商:RHOMBUS-IND 制造商全稱:Rhombus Industries Inc. 功能描述:SMPS Inductor
L387 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:VERY LOW DROP 5V REGULATOR WITH RESET
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*