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參數(shù)資料
| 型號： | HC55142IMZ96 |
| 廠商： | INTERSIL CORP |
| 元件分類： | 模擬傳輸電路 |
| 英文描述： | Low Power Universal SLIC Family |
| 中文描述： | TELECOM-SLIC, PQCC28 |
| 封裝： | ROHS COMPLIANT, PLASTIC, LCC-28 |
| 文件頁數(shù)： | 20/36頁 |
| 文件大?。?/td> | 701K |
| 代理商： | HC55142IMZ96 |
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20
FN4659.13
June 1, 2006
SPM Pin
For optimum performance, the PC board interconnect the
SPM pin should be as short as possible. If pulses metering is
not being used, then this pin should be grounded as close to
the device pin as possible.
RLIM Pin
The current limiting resistor R
LIM
needs to be as close to the
RLIM pin as possible.
Layout of the 2-Wire Impedance Matching
Resistor Z
T
Proper connection to the ZT pin is to have the external Z
T
network as close to the device pin as possible.
The ZT pin is a high impedance pin that is used to set the
proper feedback for matching the impedance of the 2-wire
side. This will eliminate circuit board capacitance on this pin
to maintain the 2-wire return loss across frequency.
Digital Logic Inputs
Table 1 is the logic truth table for the 3V to 5V logic input
pins. A combination of the control pins C3, C2 and C1 select
1 of the possible 6 operating states. The 8th state listed is
Thermal Shutdown. Thermal Shutdown protection is invoked
if a fault condition on the tip or ring causes the junction
temperature of the die to exceed 175°C. A description of
each operating state and the control logic follows:
Open Circuit State (C3 = 0, C2 = 0, C1 = 0)
In this state, the tip and ring outputs are in a high impedance
condition (>1M
). No supervisory functions are available
and SHD and GKD outputs are at a TTL high level.
4-wire loopback testing can be performed in this state. With
the PTG pin floating, the signal on the V
TX
output is 180
o
out
of phase and approximately 2 times the V
RX
input signal. If
the PTG pin is grounded, then the amplitude will be
approximately the same as its input and 180
o
out of phase.
Ringing State (C3 = 0, C2 = 0, C1 = 1)
In this state, the output of the ring relay driver pin (RRLY)
goes low (energizing the ring relay to connect the ringing
signal to the phone) if either of the following two conditions
are satisfied:
(1) The RSYNC_REV pin is grounded through a resistor -
This connection enables the RRLY pin to go low the instant
the ringing state is invoked, without any regard for the
ringing voltage (90V
RMS
-120V
RMS
) across the relay
contacts. The resistor (34.8k
to 70k
) is required to limit
the current into the RSYNC_REV pin.
(2) A ring sync pulse is applied to the RSYNC_REV pin -
This connection enables the RRLY pin to go low at the
command of a ring sync pulse. A ring sync pulse should go
TABLE 1. DETECTOR STATES
STATE
C3
C2
C1
SLIC OPERATING STATE
ACTIVE DETECTOR
OUTPUT
SHD
GKD_ LVM
0
0
0
0
Open Circuit State
4 wire loopback test capability
HIGH
HIGH
1
0
0
1
Ringing State
(Previous State cannot be Reverse
Active State)
Ring Trip Detector
HIGH
2
0
1
0
Forward Active State
Loop Current Detector
Ground Key Detector
3
0
1
1
Test Active State
Requires previous state to be in the
Forward Active state to determine the
On hook or Off hook status of the line.
On Hook
Loopback Detector
LOW
Ground Key Detector
Off Hook
Loop Current Detector
HIGH
LOW
Line Voltage Detector
4
1
0
0
Tip Open - Ground Start State
Ground Key Detector
5
1
0
1
Reserved
Reserved
N/A
N/A
6
1
1
0
Reverse Active State
Loop Current Detector
Ground Key Detector
7
1
1
1
Test Reversal Active State
Requires previous state to be in the
Reverse Active state to determine the
On hook or Off hook status of the line.
On Hook
Loop Current Detector
HIGH
Off Hook
Loop Current Detector
LOW
Line Voltage Detector
8
X
X
X
Thermal Shutdown
LOW
LOW
HC55120, HC55121, HC55130, HC55140, HC55142, HC55143, HC55150
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HC55121 | Ultra Low Power SLICs.(超低功耗用戶線路接口電路) |
| HC55130 | Ultra Low Power SLICs.(超低功耗用戶線路接口電路) |
| HC5515CMZ | ITU CO/PABX SLIC with Low Power Standby |
| HC5515 | ITU CO/PABX SLIC with Low Power Standby |
| HC5515CM | ITU CO/PABX SLIC with Low Power Standby |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HC55143 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Low Power Universal SLIC Family |
| HC55143IM | 功能描述:IC SLIC UNIVERSAL LP 32-PLCC RoHS:否 類別:集成電路 (IC) >> 接口 - 電信 系列:UniSLIC14 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS 產(chǎn)品變化通告:Product Discontinuation 06/Feb/2012 標(biāo)準(zhǔn)包裝:750 系列:* |
| HC5514X | 制造商:Harris Corporation 功能描述: |
| HC5514XB | 制造商:Harris Corporation 功能描述: |
| HC5514XEVAL1 | 功能描述:界面開發(fā)工具 UNISLIC14 FAMILY EVALUATION BRD RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
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