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PDF LE9500 Data sheet ( Hoja de datos )
| Número de pieza | LE9500 | |
| Descripción | High-Voltage Ringing SLIC Device | |
| Fabricantes | Legerity | |
| Logotipo |  |
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™
Le9500
High-Voltage Ringing SLIC Device for VolP Applications
VE950 Series
APPLICATIONS
ORDERING INFORMATION
Interface to Broadcom:
— BCM3367/3368 cable modem
— BCM3341/3351/3352 cable modem
— BCM6352 integrated multimedia adaptor
— BCM1101 residential gateway
Cable modems
Voice over Internet Protocol (VoIP)
Voice over DSL
Remote subscriber units
www.DataBShroeaedt4bUa.cnodmwireless
Short-loop access
Device
Le9500ABJC
Le9500BBJC
Le9500CBJC
Le9500DBJC
Package Type1
28-Pin PLCC, -75V (Green)
28-Pin PLCC, -85V (Green)
28-Pin PLCC, -100V (Green)
28-Pin PLCC, -100V
operation / -145V ringing
(Green)
Packing2
Tube
1. The green package meets RoHS Directive 2002/95/EC of the
European Council to minimize the environmental impact of
electrical equipment.
FEATURES
2. For delivery using a tape and reel packing system, add a "T" suffix
to the OPN (Ordering Part Number) when placing an order.
Differential ringing and codec interface
Single-ended application also supported
On-board ringing generation
— 15 to 70 Hz ring frequency supported
Three ringing options:
— Sine wave input - sine wave output
— PWM input - sine wave output
— Square wave input - trapezoidal output
Flexible power supply options:
— VBAT2 for active talking
— VBAT1 for ringing, scan, and so on
— 3.3 V for VCC
Battery switch to minimize off-hook power
Eight operating states:
— Scan
— Forward and reverse battery active
— Forward and reverse battery on-hook transmission
— Ground start
— Ring
— Disconnect
Ultra-low on-hook power:
— 29 mW scan state
— 38 mW active state
Loop start, ring trip, and ground start detection
— Fixed off hook threshold with hysteresis
— Fixed ground start threshold with hysteresis
— Fixed ring-trip threshold as a function of battery voltage
Software-controllable dual-current limit option
— 25 mA or 40mA via ground or open control input
UL1950 Compatible
— When not in ringing, |VTIP| and |VRING| are clamped to
be less than 56.5 V
Thermal shutdown protection with hysteresis
28-pin PLCC package
HV7 Technology
DESCRIPTION
The Legerity Le9500 device, part of the VE950 series, is a
subscriber line interface circuit (SLIC) that is optimized for
short-loop, power-sensitive applications. This device provides
the complete set of line interface functionality (including power
ringing) needed to interface to a subscriber loop while
providing ultra low power dissipation. The Le9500 SLIC device
is capable of operating with a VCC supply of 3.3 V, and is
designed to minimize external components required at all
device interfaces. The differential ringing and receive inputs
make the device ideal for direct interface to Data Over Cable
Service Interface Specification (DOCSIS) compliant cable
modem gateways, to multimedia adaptors, and to residential
gateway products, such as the Broadcom® BCM3367/3368,
BCM3341/3351/3352, BCM6353, BCM1101 and equivalent
products.
BLOCK DIAGRAM
VREF
AGND VCC BGND VBAT2 VBAT1
VPROG
NSTAT
RTFLT DCOUT
VITR
TXI
GAIN = 20
AAC
VTX
ITR
+
AX
–
(ITR/306)
RFT
PT
18 Ω
TIP/RING
CURRENT
SENSE
RFR
PR
18 Ω
POWER
1.5 V
BAND-GAP
REFERENCE
–
AT
+
+
AR
–
CURRENT
LIMIT
AND
INRUSH
CONTROL
RING
TRIP
LOOP
CLOSURE
RECTIFIER
X1
X1
+
–
AC
GAIN = 4
FB2
CF2
CF1
FB1
RCVP
RCVN
RINGING
GAIN = 65
PARALLEL
DATA
INTERFACE
RINGINN RINGINP
B0 B1 B2
Document ID# 081189 Date: Oct 12, 2006
Rev:
G Version: 1
Distribution: Public Document
1 page  
PRELIMINARY
PIN DESCRIPTIONS
Pin Name
NSTAT
VITR
RCVP
RCVN
RINGINN
RINGINP
www.DataSheet4UD.cCoOmUT
CF2
CF1
RTFLT
VREF
AGND
VCC
VBAT1
VBAT2
BGND
NC
VPROG
FB2
FB1
PT
PR
B2
B1
B0
ITR
VTX
TXI
Type
Output
Output
Input
Input
Input
Input
Output
—
—
—
Output
Ground
Power
Power
Power
Ground
—
Input
—
—
I/O
I/O
Input
Input
Input
Input
Output
Input
Description
Loop Closure Detector Output—Ring Trip Detector Output. When Low, this logic output indicates that
an off-hook condition exists or ringing is tripped or a ring ground has occurred.
Transmit AC Output Voltage. Output of internal AAC amplifier. This output is a voltage that is directly
proportional to the differential AC tip/ring current.
Receive AC Signal Input (Non inverting). This high-impedance input controls to AC differential voltage
on tip and ring. This node is a floating input.
Receive AC Signal Input (Inverting). This high-impedance input controls to AC differential voltage on tip
and ring. This node is a floating input.
Power Ring Signal Input. Couple to a sine wave or lower crest factor low-voltage ring signal. The input
here is amplified to provide the full power ring signal at tip and ring. This signal may be applied
continuously, even during nonringing states.
Power Ring Signal Input. Couple to a sine wave or lower crest factor low-voltage ring signal. The input
here is amplified to provide the full power ring signal at tip and ring. This signal may be applied
continuously, even during nonringing states.
DC Output Voltage. This output is a voltage that is directly proportional to the absolute value of the
differential tip/ring current. This is used to set ring trip threshold.
Filter Capacitor. Connect a capacitor from this node to ground.
Filter Capacitor. Connect a capacitor from this node to CF2.
Ring Trip Filter. Connect this lead to DCOUT via a resistor and to AGND with a capacitor to filter the ring
trip circuit to prevent spurious responses. A single-pole filter is needed.
SLIC Device Internal Reference Voltage. Output of internal 1.5 V reference voltage.
Analog Signal Ground.
Analog Power Supply. 3.3 V typical.
Battery Supply 1. High-voltage battery.
Battery Supply 2. Lower-voltage battery.
Battery Ground. Ground return for the battery supplies.
No Connection.
Current-Limit Program Input. Connect this pin to ground to set current limit to 25 mA; leave this pin open
to set current limit to 40 mA.
Polarity Reversal Slowdown Capacitor. Connect a capacitor from this node for controlling rate of battery
reversal. If ramped battery reversal is not desired, leave this pin floating.
Polarity Reversal Slowdown Capacitor. Connect a capacitor from this node for controlling rate of battery
reversal. If ramped battery reversal is not desired, leave this pin floating.
Protected Tip. The output drive of the tip amplifier and input to the loop-sensing circuit. Connect to loop
through overvoltage and overcurrent protection.
Protected Ring. The output drive of the ring amplifier and input to the loop sensing circuit. Connect to
loop through overvoltage and overcurrent protection.
State Control Input. These pins have an internal 150 kΩ pull-up.
State Control Input. These pins have an internal 150 kΩ pull-up.
State Control Input. These pins have an internal 150 kΩ pull-up.
Transmit Gain. Input to AX amplifier. Connect a 4.75 kΩ resistor from this node to VTX to set transmit
gain. Gain shaping for termination impedance with a first-generation codec is also achieved with a network
from this node to VTX.
AC Output Voltage. Output of internal AX amplifier. The voltage at this pin is directly proportional to the
differential tip/ring current.
AC/DC Separation. Input to internal AAC amplifier. Connect a capacitor from this pin to VTX.
Le9500 VE950 Series Data Sheet
5
5 Page 
PRELIMINARY
Table 3. Logic Inputs and Outputs
Parameter
Input Voltages:
Low Level
High Level
Input Current:
Low Level (VCC = 3.46 V, VI = 0.4 V)
High Level (VCC = 3.46 V, VI = 2.4 V)
Output Voltages (open collector with internal 60 kΩ pull-up resistor):
Low Level (VCC = 3.13 V, IOL = 360 µA)
High Level (VCC = 3.13 V, IOH = –5 µA)
Symbol
VIL
VIH
IIL
IIH
VOL
VOH
Min Typ Max Unit
–0.5 0.2
0.5
2.0 2.5 VCC
V
— — ±50 µA
— — ±50
0 0.2 0.5 V
2.2 — VCC
Table 4. Ground Start
Parameter
Tip Open state – Tip Input Impedance
Threshold, On– to Off–hook
w w w . D a t aHySsthereesise t 4 U . c o m
Min Typ
150 —
— 13
—2
Table 5. Ringing Specifications
Parameter
RINGINN/P:
Input Voltage Swing
Ring Signal Isolation:
PT/PR to VTX
Ring state
Ring Signal Isolation:
RINGIN to PT/PR
Non-ringing state
Ring Signal Distortion1:
Open or 5 REN Load, 100 Ω Loop
5 REN (Ringing Equivalency Number) is equivalent of 1380 Ω in series with 40 µF
Differential Gain RINGINP/N to PT/PR
RLOAD = Open,
VBAT1 = –75 V (Le9500A), VRINGINP/N = 0.51 VPP;
VBAT1 = –85 V (Le9500B), VRINGINP/N = 0.59 VPP;
VBAT1 = –100 V (Le9500C), VRINGINP/N = 0.70 VPP;
VBAT1 = –145 V (Le9500D), VRINGINP/N = 1.04 VPP.
Min
0
—
—
—
124
Max Unit
— kΩ
— mA
— mA
Typ Max Unit
— VCC
V
60 — dB
80 — dB
3 —%
130 136 V/V
1. This parameter is not tested in production. It is guaranteed by design and device characterization.
Table 6. Ring Trip
Parameter
Ring Trip (NSTAT = 0):
Loop Resistance (total) VBAT1 Applied
Ring Trip (NSTAT = 1):
Loop Resistance (total) VBAT1 Applied
Trip Time (f = 20 Hz)1
Hysteresis1
Min Typ Max Unit
100 — 600 Ω
— — 10 kΩ
— — 100 ms
— 10 — mA
1. This parameter is not tested in production. It is guaranteed by design and device characterization.
Le9500 VE950 Series Data Sheet
11
11 Page | ||
| Páginas | Total 26 Páginas | |
| PDF Descargar | [ Datasheet LE9500.PDF ] | |
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