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PDF HC1-5502B-5 Data sheet ( Hoja de datos )
| Número de pieza | HC1-5502B-5 | |
| Descripción | EIA/ITU PABX SLIC with 30mA Loop Feed | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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Data Sheet
HC-5502B
February 1999 File Number 2884.5
EIA/ITU PABX SLIC with 30mA Loop Feed
The Intersil SLIC incorporates many of the BORSHT
functions on a single IC chip. This includes DC battery feed,
a ring relay driver, supervisory and hybrid functions. This
device is designed to maintain transmission performance in
the presence of externally induced longitudinal currents.
Using the unique Intersil dielectric isolation process, the
SLIC can operate directly with a wide range of station
battery voltages.
The SLIC also provides selective denial of power. If the PBX
system becomes overloaded during an emergency, the SLIC
will provide system protection by denying power to selected
subscriber loops.
The Intersil SLIC is ideally suited for the design of new digital
PBX systems, by eliminating bulky hybrid transformers.
Ordering Information
TEMP. RANGE
PART NUMBER
(oC)
PACKAGE
PKG. NO.
HC1-5502B-5
HC1-5502B-9
HC3-5502B-5
HC4P5502B-5
HC9P5502B-5
0 to 75
-40 to 85
0 to 75
0 to 75
0 to 75
24 Ld CERDIP F24.6
24 Ld CERDIP F24.6
24 Ld PDIP E24.6
28 Ld PLCC N28.45
24 Ld SOIC M24.3
Pinouts
HC-5502B
(PDIP, CERDIP, SOIC)
TOP VIEW
TIP 1
RING 2
VB+ 3
C1* 4
C3 5
DG 6
RS 7
RD 8
TF 9
RF 10
VB- 11
BG 12
24 TX
23 AG
22 C4
21 RX
20 +IN
19 -IN
18 OUT
17 C2
16 RC
15 PD
14 GKD
13 SHD
Features
• Capable of 12V or 5V (VB+) Operation
• Monolithic Integrated Device
• DI High Voltage Process
• Compatible With Worldwide PBX Performance
Requirements
• Controlled Supply of Battery Feed Current for Short Loops
(30mA)
• Internal Ring Relay Driver
• Low Power Consumption During Standby
• Switch Hook, Ground Key and Ring Trip Detection
Functions
• Selective Denial of Power to Subscriber Loops
Applications
• Solid State Line Interface Circuit for Analog and Digital PBX
Systems
• Direct Inward Dial (DID) Trunks
• Voice Messaging PBXs
• Related Literature
- AN549, The HC-5502S/4X Telephone Subscriber Line
Interface Circuits (SLIC)
- AN571, Using Ring Sync with HC-5502A and HC-5504
SLICs
HC-5502B
(PLCC)
TOP VIEW
4 3 2 1 28 27 26
C1† 5
C3 6
DG 7
N/C 8
RS 9
RD 10
TF 11
25 RX
24 +IN
23 -IN
22 N/C
21 OUT
20 C2
19 RC
12 13 14 15 16 17 18 † OPTIONAL
47 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  
HC-5502B
Pin Descriptions
28 PIN
PLCC
24 PIN
DIP/SOIC
21
32
43
54
65
76
97
10 8
11 9
12 10
13 11
14 12
16 13
17 14
18 15
19 16
20 17
21 18
23 19
SYMBOL
TIP
RING
VB+
C1
C3
DG
(Note 5)
RS
RD
TF
RF
VB-
BG
(Note 1)
SHD
GKD
PD
RC
C2
OUT
-IN
DESCRIPTION
An analog input connected to the TIP (more positive) side of the subscriber loop through a 150Ω
feed resistor and a ring relay contact. Functions with the Ring terminal to receive voice signals from
the telephone and for loop monitoring process.
An analog input connected to the RING (more negative) side of the subscriber loop through a 150Ω
feed resistor and a ring relay contact. Functions with the Tip terminal to receive voice signals from
the telephone and for loop monitoring purposes.
Positive Voltage Source - Most positive supply. VB+ is typically 12V or 5V.
Capacitor #1 - Optional Capacitor used to improve power supply rejection. This pin should be left open
if unused.
Capacitor #3 - An external capacitor to be connected between this terminal and analog ground. Re-
quired for proper operation of the loop current limiting function, and for filtering VB- supply. Typical
value is 0.3µF, 30V.
Digital Ground - To be connected to zero potential and serves as a reference for all digital inputs and
outputs on the SLIC.
Ring Synchronization Input - A TTL - compatible clock input. The clock should be arranged such that
a positive transition occurs on the negative going zero crossing of the ring voltage source, ensuring
that the ring relay is activated and deactivated when the instantaneous ring voltage is near zero. If
synchronization is not required, tie to 5V.
Relay Driver - A low active open collector logic output. When enabled, the external ring relay is
energized.
Tip Feed - A low impedance analog output connected to the TIP terminal through a 150Ω feed
resistor. Functions with the RF terminal to provide loop current, feed voice signals to the telephone
set, and sink longitudinal current.
Ring Feed - A low impedance analog output connected to the RING terminal through a 150Ω feed
resistor. Functions with the TF terminal to provide loop current, feed voice signal to the telephone
set, and sink longitudinal current.
Negative Voltage Source - Most negative supply. VB- is typically -48V with an operational range of -
42V to -58V. Frequently referred to as “battery”.
Battery Ground - To be connected to zero potential. All loop current and some quiescent current
flows into this ground terminal.
Switch Hook Detection - A low active LS TTL - compatible logic output. This output is enabled for
loop currents exceeding 10mA and disabled for loop currents less than 5mA.
Ground Key Detection - A low active LS TTL - compatible logic output. This output is enabled if the
DC current into the ring lead exceeds the DC current out of the tip lead by more than 20mA, and
disabled if this current difference is less than 10mA.
Power Denial - A low active TTL - Compatible logic input. When enabled the switch hook detect
(SHD) and ground key detect (GKD) are not necessarily valid, and the relay driver (RD) output is
disabled.
Ring Command - A low active TTL - Compatible logic input. When enabled, the relay driver (RD)
output goes low on the next rising edge of the ring sync (RS) input, as long as the SLIC is not in the
power denial state (PD = 0) or the subscriber is not already off- hook (SHD = 0).
Capacitor #2 - An external capacitor to be connected between this terminal and digital ground.
Prevents false ground key indications from occurring during ring trip detection. Typical value is
0.15µF, 10V. This capacitor is not used if ground key function is not required.
The analog output of the spare operational amplifier.
The inverting analog input of the spare operational amplifier.
51
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