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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207 | Copyright Intersil Corporation 1999
HC5526
ITU CO/PABX SLIC with Low Power
Standby
The HC5526 is a subscriber line interface circuit that is
compliant with CCITT standards. Enhancements include
immunity to circuit latch-up during hot plug and absence of
false signaling in the presence of longitudinal currents.
The HC5526 is fabricated in a High Voltage Dielectrically
Isolated (DI) Bipolar Process that eliminates leakage
currents and device latch-up problems normally associated
with Junction Isolated (JI) ICs. The elimination of the
leakage currents results in improved circuit performance for
wide temperature extremes. The latch free benefit of the DI
process guarantees operation under adverse transient
conditions. This process feature makes the HC5526 ideally
suited for use in harsh outdoor environments.
Features
DI Monolithic High Voltage Process
Programmable Current Feed (20mA to 60mA)
Programmable Loop Current Detector Threshold and
Battery Feed Characteristics
Ground Key and Ring Trip Detection
Compatible with Ericsson’s PBL3764
Thermal Shutdown
On-Hook Transmission
Wide Battery Voltage Range (-24V to -58V)
Low Standby Power
Meets CCITT Transmission Requirements
-40
o
C to 85
o
C Ambient Temperature Range
Applications
On-Premises (ONS)
Key Systems
PBX
Related Literature
- AN9537, Operation of the HC5513/26 Evaluation Board
Block Diagram
Ordering Information
PART NUMBER
TEMP.
RANGE (
o
C)
PACKAGE
PKG.
NO.
HC5526CM
0 to 70
28 Ld PLCC
N28.45
HC5526CP
0 to 70
22 Ld PDIP
E22.4
HC5526IM
-40 to 85
28 Ld PLCC
N28.45
HC5526IP
-40 to 85
22 Ld PDIP
E22.4
RINGRLY
DT
DR
TIP
RING
HPT
HPR
V
BAT
V
CC
V
EE
AGND
BGND
V
TX
RSN
E0
E1
C1
C2
DET
RING RELAY
DRIVER
4-WIRE
INTERFACE
VF SIGNAL
PATH
GROUND KEY
DETECTOR
LOOP CURRENT
DETECTOR
R
DC
RSG
BIAS
DIGITAL
MULTIPLEXER
RING TRIP
DETECTOR
2-WIRE
INTERFACE
R
D
Data Sheet
October 1998
File Number
4151.6