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參數資料
| 型號： | HC5549IM |
| 廠商： | HARRIS SEMICONDUCTOR |
| 元件分類： | 模擬傳輸電路 |
| 英文描述： | THERMISTOR PTC1KOHM 70 DEG 0805 |
| 中文描述： | TELECOM-SLIC, PQCC28 |
| 文件頁數： | 1/13頁 |
| 文件大小： | 87K |
| 代理商： | HC5549IM |
Semiconductor
4-80
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-800-4-HARRIS or 407-727-9207
|
Copyright
Harris Corporation 1999
RSLIC18 is a trademark of Harris Corporation.
HC5549
Low Power SLIC with Battery Switch
The HC5549 Subscriber line
interface circuit is a 100V
diellectrically isolated bipolar
integrated circuit for use in
short loop ISDN, PABX and
Pairgain applications. The HC5549 has been optimized for low
power as required for battery backed remote terminals or for
applications requiring emergency powering from the line such
as European ISDN NT1+ designs.
A high and low voltage battery supply may be connected to
the HC5549 so that power dissipation can be lowered in the
off hook condition in these short loop applications. The high
battery supply can be used in the on-hook condition to allow
interfacing to fax and answering machines that require 48V
to detect end of call status. The HC5549 also has a low
power standby state with very low power consumption
(35mW) resulting in exceptionally low battery drain while
providing continued loop supervision.
The HC5549 provides loop current, ground key and ring trip
detect functions as well as an alarm output to indicate
thermal overload.
2-wire to 4-wire and 4-wire to 2-wire conversion is provided
and impedance matching is achieved using a single external
network. The HC5549 is compatible with dual and single
supply switched capacitor or DSP codec/filters
Features
Dual Battery Operation
Single Additional +5V Supply
Low Standby Power Consumption (48V, 35mW)
On Hook Transmission
Tip and Ring Disconnect
Soft or Hard Polarity Reversal
Supports 12 kHz or 16 kHz Pulse Metering
Ring Relay Driver
On Chip 2-wire AC/DC Loopback
No Latch-Up or Power Supply Sequencing
0
o
to 70
o
or -40
o
to 85
o
Ambient Temp Range
Low External Component Count
Applications
ISDN NT1+ Terminals
Pairgain Remote Termination
PABX and Key Systems
Related Literature
AC SPICE Macromodel
Block Diagram
VRS
VRX
VTX
-IN
VFB
F2
F1
F0
ILIM
TIP
RING
SW+
SW-
RTD RD
DET ALM
RINGING
PORT
4-WIRE
PORT
CONTROL
LOGIC
BATTERY
SWITCH
TRANSMIT
SENSING
DETECTOR
LOGIC
DC
CONTROL
2-WIRE
PORT
TEST
ACCESS
E0
POL
CDC
VBH
VBL
BSEL
SWC
Data Sheet
January 1999
File Number
4539.1
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