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PDF HC9P5509B3999-003 Data sheet ( Hoja de datos )
| Número de pieza | HC9P5509B3999-003 | |
| Descripción | SLIC Subscriber Line Interface Circuit | |
| Fabricantes | Intersil Corporation | |
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HC-5509B3999-003
July 2003
FN4126.1
SLIC Subscriber Line Interface Circuit
The HC-5509B3999-003 telephone Subscriber Line
Interface Circuit integrates most of the BORSCHT functions
on a monolithic IC. The device is manufactured in a
Dielectric Isolation (DI) process and is designed for use as a
high voltage interface between the traditional telephone
subscriber pair (Tip and Ring) and the low voltage filtering
and coding/decoding functions of the line card. Together with
a secondary protection diode bridge and “feed” resistors, the
device will withstand 1000V lightning induced surges, in
plastic packages. The SLIC also maintains specified
transmission performance in the presence of externally
induced longitudinal currents. The BORSCHT functions that
the SLIC provides are:
• Battery Feed with Subscriber Loop Current Limiting
• Overvoltage Protection
• Ring Relay Driver
• Supervisory Signaling Functions
• Hybrid Functions (with External Op-Amp)
• Test (or Battery Reversal) Relay Driver
In addition, the SLIC provides selective denial of power to
www.DataSheet4U.cosmubscriber loops, a programmable subscriber loop current
limit from 20mA to 60mA, a thermal shutdown with an alarm
output and line fault protection. Switch hook detection, ring
trip detection and ground key detection functions are also
incorporated in the SLIC device.
The HC-5509B3999-003 SLIC is ideally suited for line card
designs in PBX and CO systems, replacing traditional
transformer solutions.
Pinout
HC-5509B3999-003 (SOIC)
TOP VIEW
Features
• DI Monolithic High Voltage Process
• Compatible with Worldwide PBX and CO Performance
Requirements
• Controlled Supply of Battery Feed Current with
Programmable Current Limit
• Operates with 5V Positive Supply (VB+)
• Internal Ring Relay Driver and a Utility Relay Driver
• High Impedance Mode for Subscriber Loop
• High Temperature Alarm Output
• Low Power Consumption During Standby Functions
• Switch Hook, Ground Key, and Ring Trip Detection
• Selective Power Denial to Subscriber
• Voice Path Active During Power Denial
• On-Chip Op Amp for 2-Wire Impedance Matching
Applications
• Solid State Line Interface Circuit for PBX or Central Office
Systems, Digital Loop Carrier Systems
• Hotel/Motel Switching Systems
• Direct Inward Dialing (DID) Trunks
• Voice Messaging PBXs
• High Voltage 2-Wire/4-Wire, 4-Wire/2-Wire Hybrid
Part Number Information
PART NUMBER
HC9P5509B3999-003
TEMP.
RANGE (oC) PACKAGE
0 to +75 28 Ld SOIC
PKG.
DWG. #
M28.3
AG 1
VB+ 2
C1 3
F1 4
F0 5
RS 6
SHD 7
GKD 8
TST 9
ALM 10
ILMT 11
OUT 1 12
-IN 1 13
TIP 14
28 BG
27 VB-
26 RF
25 TF
24 VFB
23 RD
22 DG
21 PR
20 PRI
19 VTX
18 C2
17 VRX
16 RFS
15 RING
TRUTH TABLE
F1 F0
ACTION
0 0 Normal Loop Feed
0 1 RD Active
1 0 Power Down Latch RESET
1 0 Power on RESET
1 1 Loop Power
Denial Active
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2003. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1 page  
HC-5509B3999-003
Pin Descriptions
SOIC
SYMBOL
DESCRIPTION
1 AG Analog Ground - To be connected to zero potential. Serves as a reference for the transmit output and receive input
terminals.
2 VB+ Positive Voltage Source - most positive supply.
3 C1 Capacitor #C1 - An external capacitor to be connected between this terminal and analog ground. Required for proper
operation of the loop current limiting function.
4 F1 Function Address #1 - A TTL and CMOS compatible input used with F0 function address line to externally select logic
functions. The three selectable functions are mutually exclusive. See Truth Table on page1. F1 should be toggled high
after power is applied.
5 F0 Function Address #0 - A TTL and CMOS compatible input used with F1 function address line to externally select logic
functions. The three selectable functions are mutually exclusive. See Truth Table on page 1.
6 RS Ring Synchronization Input - A TTL - compatible clock input. The clock is arranged such that a positive pulse (50 -
500µs) occurs on the zero crossing of the ring voltage source, as it appears at the RFS terminal. For Tip side injected
systems, the RS pulse should occur on the negative going zero crossing and for Ring injected systems, on the positive
going zero crossing. This ensures that the ring delay activates and deactivates when the instantaneous ring voltage
is near zero. If synchronization is not required, the pin should be tied to +5.
7 SHD Switch Hook Detection - An active low LS TTL compatible logic output. A line supervisory output.
8 GKD Ground Key Detection - An active low LS TTL compatible logic output. A line supervisory output.
9 TST A TTL logic input. A low on this pin will set a latch and keep the SLIC in a power down mode until the proper F1, F0
state is set and will keep ALM low. See Truth Table on page 1.
10 ALM A LS TTL compatible active low output which responds to the thermal detector circuit when a safe operating die
temperature has been exceeded. When TST is forced low by an external control signal, ALM is latched low until the
proper F1, F0 state and TST input is brought high. The ALM can be tied directly to the TST pin to power down the
part when a thermal fault is detected and then reset with F0, F1. See Truth Table on page 1. It is possible to ignore
transient thermal overload conditions in the SLIC by delaying the response to the TST pin from the ALM. Care must
be exercised in attempting this as continued thermal overstress may reduced component life.
11
ILMT
Loop Current Limit - Voltage on this pin sets the short loop current limiting conditions using a resistive voltage divider.
12 OUT1 The analog output of the spare operational amplifier.
13 -IN1 The inverting analog input of the spare operational amplifier.
14 TIP An analog input connected to the TIP (more positive) side of the subscriber loop through a feed resistor and ring relay
contact. Functions with the RING terminal to receive voice signals from the telephone and for loop monitoring
purpose.
15 RING An analog input connected to the RING (more negative) side of the subscriber loop through a feed resistor. Functions
with the TIP terminal to receive voice signals from the telephone and for loop monitoring purposes.
16 RFS Ring Feed Sense - Senses RING side of the loop for Ground Key Detection. During Ring injected ringing the ring
signal at this node is isolated from RF via the ring relay. For Tip injected ringing, the RF and RFS pins must be shorted.
17 VRX Receive Input, 4-Wire Side - A high impedance analog input. AC signals appearing at this input drive the Tip Feed
and Ring Feed amplifiers differentially.
18 C2 Capacitor #C2 - An external capacitor to be connected between this terminal and ground. It prevents false ring trip
detection from occurring when longitudinal currents are induced onto the subscriber loop from power lines and other
noise sources. This capacitor should be nonpolarized.
19 VTX Transmit Output, 4-Wire Side - A low impedance analog output which represents the differential voltage across TIP
and RING. Transhybrid balancing must be performed beyond this output to completely implement 2-Wire to 4-Wire
conversion. This output is referenced to analog ground. Since the DC level of this output varies with loop current,
capacitive coupling to the next stage is necessary.
20 PRI A TTL compatible input used to control PR. PRI active High = PR active low.
21 PR An active low open collector output. Can be used to drive a Polarity Reversal Relay.
22 DG Digital Ground - To be connected to zero potential. Serves as a reference for all digital inputs and outputs on the SLIC.
23 RD Ring Relay Driver - An active low open collector output. Used to drive a relay that switches ringing signals onto the
2-Wire line.
5
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