參數(shù)資料
型號(hào)： IDT821621J
廠商： INTEGRATED DEVICE TECHNOLOGY INC
元件分類： 模擬傳輸電路
英文描述： LONG HAUL SLIC
中文描述： TELECOM-SLIC, PQCC32
封裝： PLASTIC, LCC-32
文件頁(yè)數(shù)： 10/21頁(yè)
文件大?。?/td> 322K
代理商： IDT821621J
Functional Description
8
October 8, 2003
IDT821621
LONG HAUL SLIC
Figure 2 Ring-trip Detection
RELAY DRIVERS CONTROL
The IDT821621 provides an on-chip ring relay driver (RINGOUT) to
control the external ring relay. This ring relay driver is active only in
Ringing state. It is an internal transistor with the emitter internally
connected to BGND and the collector as the driver output (see
Figure 3
).
During ringing, the ring relay driver is activated and the ringing source is
connected by an external ring relay to the Tip and Ring lines through
ring feed resistors.
The IDT821621 also provides three additional relay drivers
(RYOUT1, RYOUT2 and RYOUT3) on the chip. All of them are open-
collector drivers with emitters internally connected to BGND. They allow
for direct operation of external test relays. The digital pins D1 to D3 are
used to control the relay drivers RYOUT1, RYOUT2 and RYOUT3
respectively. Logic low on D1 to D3 activates their respective relay
drivers.
Figure 3 Relay Drivers Schematic
DC FEEDING
The IDT821621 provides constant-current feeding as shown in
Figure 4
.
Figure 4 DC Feeding Characteristics
Notes:
1.
2.
3.
The feed current is programmable. Two resistors R
DC1
and R
DC2
,
and a capacitor C
DC
form the network for programming the feed current.
See
Figure 5.
Figure 5 DC Feed Programming Circuit
The feed current I
FEED
is calculated by the following equation:
R
DC1
R
DC2
+
An external capacitor C
CAS
connected to the CAS pin is used to filter
noise that may originate from the battery source and prevent the output
amplifiers from saturating. The value of this anti-saturation capacitor is
A(TIP)
B(RING)
Ringing
Source
+
-
Tip Line
Ring Line
R
F
R
F
K
R
K
R
R
4
R
3
R
B2
R
B1
R
1
R
2
C
RT1
C
RT2
DB
DA
K
R
Ring Relay
RINGOUT
SLIC
RINGOUT
RYOUT1
RYOUT2
RYOUT3
BGND
BGND
60
Note 3
Note 2
Note 1
0
I
L
(mA)
30
VAB
(volts)
V
AB
I
L
R
L
′
+
R
DC1
R
DC2
------------1250
L
′
where
,
=
=
R
L
′
R
L
2R
F
+
=
V
AB
0.857 V
BAT
3.3
+
)
I
L
R
------------------------------------
R
+
300
–
=
V
AB
0.857 V
BAT
1.2
+
)
I
L
R
------------------------------------
R
+
300
–
=
SLIC
A(TIP)
B(RING)
RDC
RSN
R
DC2
R
DC1
C
DC
R
L
I
L
a
b
Feed current is programmed by R
DC1
and R
DC2.
I
FEED
------------1250
=
相關(guān)PDF資料
PDF描述
IDT82P2281 Single T1/E1/J1 Long Haul Short Haul Transceiver
IDT82P2281PN Single T1/E1/J1 Long Haul Short Haul Transceiver
IDT82V2616 INVERSE MULTIPLEXING FOR ATM
IDT82V2616BB INVERSE MULTIPLEXING FOR ATM
IDT82V2081 SINGLE CHANNEL T1/E1/J1 LONG HAUL/ SHORT HAUL LINE INTERFACE UNIT
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
IDT8217LP35P 制造商:Integrated Device Technology Inc 功能描述:
IDT82ALVCH16823PA 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:3.3V CMOS 18-BIT BUS-INTERFACE FLIPFLOP WITH 3-STATE OUTPUTS AND BUS-HOLD
IDT82EB55142 功能描述:CARD SLIC CARD 55142 RoHS:否 類別:編程器，開(kāi)發(fā)系統(tǒng) >> 評(píng)估演示板和套件 系列:- 標(biāo)準(zhǔn)包裝:1 系列:PCI Express® (PCIe) 主要目的:接口，收發(fā)器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要屬性:- 次要屬性:- 已供物品:板
IDT82EB55185 功能描述:CARD SLIC CARD 55185 RoHS:否 類別:編程器，開(kāi)發(fā)系統(tǒng) >> 評(píng)估演示板和套件 系列:- 標(biāo)準(zhǔn)包裝:1 系列:PCI Express® (PCIe) 主要目的:接口，收發(fā)器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要屬性:- 次要屬性:- 已供物品:板
IDT82EBP2281 功能描述:BOARD EVAL FOR 82P2281 RoHS:否 類別:編程器，開(kāi)發(fā)系統(tǒng) >> 評(píng)估演示板和套件 系列:SuperJet™ 標(biāo)準(zhǔn)包裝:1 系列:PCI Express® (PCIe) 主要目的:接口，收發(fā)器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要屬性:- 次要屬性:- 已供物品:板
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(xiě)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

*
*
*