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PDF HC5503T Data sheet ( Hoja de datos )
| Número de pieza | HC5503T | |
| Descripción | Balanced PBX/Key System SLIC/ Subscriber Line Interface Circuit | |
| Fabricantes | Intersil Corporation | |
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Data Sheet
June 1998
HC5503T
File Number 4506
Balanced PBX/Key System SLIC,
Subscriber Line Interface Circuit
The Intersil HC5503T is a low cost Subscriber Line Interface
Circuit (SLIC) that replaces the components of a discrete
Transformer Analog circuit design. The monolithic integrated
design provides improved performance and system reliability.
The HC5503T provides: Current limited DC feed to the
subscriber loop, maintains a flat frequency response over the
voice band and beyond, has self resetting thermal protection
that allows conversation to continue while the fault is
present, provides a TTL subscriber off hook indication even
in the presence of longitudinal currents, and limits system
power consumption on short loops.
The HC5503T provides balanced 2-wire transmission and
has excellent longitudinal balance, while providing on hook
transmission and longitudinal current rejection in both the
on-hook or off-hook conditions.
The SLIC needs only one +5V supply in addition to the main
battery supply for loop current and operates over a range of
battery voltages (-24V to -58V).
Available in 22PDIP AND 24SO packaging. The HC5503T is
ideally suited as a replacement for discrete line circuits in
low cost analog PABXs, small Office/Home Office products
or Small Key Systems.
Block Diagram
TF
RF
VBAT
BGND
LOOP FEED
Features
• Monolithic Integrated Device
• Controlled Supply of Battery Feed Current for Short Loops
(30mA)
• Single +5V Supply
• Allows Interfacing With All Ringing Systems
• Switch Hook Detection
• Compatible With Worldwide PBX Performance
Requirements
• Low Power Consumption During Standby
Applications
• PBX Switches (Analog, Digital or ISDN)
• Key Telephone Systems (KTS)
• ISDN PC Plug in Modems
• ISDN Small Office / Home Office (SOHO) Terminal
Adapters (TA)
• CTI (Computer Telephony Integration) Products
Ordering Information
PART NUMBER
HC5503TCP
HC5503TCB
TEMP.
RANGE (oC) PACKAGE
0 to 75 22 Ld PDIP
0 to 75 24 Ld SOIC
PKG. NO.
E22.4
M24.3
TIP RING
C1
SPEECH CIRCUIT
TX
RX
LOOP DETECTOR
BIAS
RS
VCC
AGND DGND
SHD
50 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
1 page  
Applications Diagram
HC5503T
SYSTEM CONTROLLER
TIP
K1A
RB1
PRIMARY
SUBSCRIBER PROTECTION
LOOP
(NOTE 4)
RING
K1A
RB3
PTC
5V 7
RS
13
SHD
C5
24
TX
1
TIP
RB2 9
TIP FEED
SLIC
HC5503T
C4
21
RX
T3 20
VBAT
10
RB4
2
RING FEED
RING
VBAT BGND
11 12
C2
DGND AGND
6 23
19
T2
18
T1
C1 5
VCC
C3 3
C1
-48V
VCC
Z1
-48V
RING GENERATOR
PIN NUMBERS GIVEN FOR SOIC PACKAGE.
FIGURE 1. TYPICAL LINE CIRCUIT APPLICATION WITH THE MONOLITHIC SLIC
Typical Component Values
C1 = 0.3µF, 30V, ±20%
C2 = 0.01µF, 100V,±20%
C3 = 0.01µF, 20V, ±20%
C4 = 0.5µF, 20V, ±20%
C5 = 0.5µF, 30V, ±20%
RB1 = RB2 = RB3 = RB4 = 150Ω
PTC used as ring generator ballast.
NOTES:
4. Secondary protection diode bridge recommended is a 2A, 200V type.
5. All grounds (AG, BG, and DG) must be applied before VCC or VBAT. Failure to do so may result in premature failure of the part. If a user wishes
to run separate grounds off a line card, the AG must be applied first.
6. Application shows Ring Injected Ringing.
All Intersil semiconductor products are manufactured, assembled and tested under ISO9000 quality systems certification.
Intersil semiconductor products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time with-
out notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see web site http://www.intersil.com
54
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