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參數資料
| 型號： | L9500A |
| 英文描述： | High-Voltage Ringing SLIC for VolP Applications |
| 中文描述： | 高壓振鈴用戶接口應用的福爾普 |
| 文件頁數： | 4/32頁 |
| 文件大?。?/td> | 616K |
| 代理商： | L9500A |
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Preliminary Data Sheet
September 2001
High-Voltage Ringing SLIC for VoIP Applications
L9500A
4
Agere Systems Inc.
Features
I
On board balanced ringing generation:
— No ring relay
— No bulk ring generator required
— 15 Hz to 70 Hz ring frequency supported
— Sine wave input-sine wave output
— PWM input-sine wave output
— Square wave input-trapezoidal output
I
Power supplies requirements:
— V
CC
talk battery and ringing battery required
— No –5 V supply required
— No high-voltage positive supply required
I
Flexible Vcc options:
— 5 V or 3.3 V V
CC
operation
— 5 V or 3.3 V V
CC
interchangeable and transparent
to users
I
Battery switch via logic control:
— Minimize off-hook power dissipation
I
Minimal external components required
I
Eight operating states:
— Forward active, V
BAT2
applied
— Polarity reversal active, V
BAT2
applied
— On-hook transmission, V
BAT1
applied
— On-hook transmission polarity reversal, V
BAT1
applied
— Ground start
— Scan
— Forward disconnect
— Ring mode
I
Unlatched parallel data control interface
I
Ultralow SLIC power:
— Scan 38 mW (V
CC
= 5 V)
— Forward/reverse active 54 mW (V
CC
= 5 V)
— Scan 27 mW (V
CC
= 3.3 V)
— Forward/reverse active 41 mW (V
CC
= 3.3 V)
I
Supervision:
— Loop start, fixed threshold with hysteresis
— Ring trip, single-pole ring trip filtering, fixed thresh-
old as a function of battery voltage
— Ground start fixed threshold with hysteresis
I
Adjustable current limit:
— 25 mA or 40 mA via ground or open to control
input
I
Overhead voltage:
— Clamped typically <51 V differentially
— Clamped maximum <56.5 V single-ended
I
Thermal shutdown protection with hysteresis
I
Device interfaces:
— Differential receive interface
— Singled-ended transmit interface
— Differential ring input
I
Package options:
— 28-pin PLCC
— 48-pin MLCC
I
90 V CBIC-S technology
Description
The L9500 is designed to provide battery feed, ringing,
and supervision functions on short plain old telephone
service (POTS) loops. This device is designed for
ultralow power in all operating states.
The L9500 offers 8 operating states. The device
assumes use of a lower-voltage talk battery, a higher-
voltage ringing battery, and a V
CC
supply.
The L9500 requires only a positive V
CC
supply. No
–5 V supply is needed. The L9500 can operate with a
V
CC
of either 5 V or 3.3 V, allowing for greater user flex-
ibility. The choice of V
CC
voltage is transparent to the
user; the device will function with either supply voltage
connected.
Two batteries are used:
1. A high-voltage ring battery (V
BAT1
).
V
BAT1
is a maximum –75 V. V
BAT1
is used for power
ring signal amplification and for scan, on-hook
transmission, and ground start modes. This supply
is current limited to approximately the maximum
power ringing current, typically 50 mA.
2. A lower-voltage talk battery (V
BAT2
).
V
BAT2
is used for active mode powering.
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