L9215G データシートの表示（PDF） - Agere -> LSI Corporation

部品番号

コンポーネント説明

メーカー

L9215G

Short-Loop Sine Wave Ringing SLIC

Agere -> LSI Corporation 

L9215A/G

Short-Loop Sine Wave Ringing SLIC

Data Sheet

September 2001

Features

s Onboard 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

s Power supplies requirements:

— VCC talk battery and ringing battery required

— No –5 V supply required

— No high-voltage positive supply required

s Flexible Vcc options:

— 5 V or 3.3 V VCC operation

— 5 V or 3.3 V VCC interchangeable and transparent

to users

s Logic-controlled battery switch:

— Minimize off-hook power dissipation

s Minimal external components required

s 11 operating states:

— Forward active, VBAT2 applied

— Polarity reversal active, VBAT2 applied

— On-hook transmission, VBAT1 applied

— On-hook transmission polarity reversal, VBAT1

applied

— PPM active forward active, VBAT2 applied

— PPM active polarity reversal active, VBAT2 applied

— PPM active on-hook transmission, VBAT1 applied

— PPM active on-hook transmission polarity rever-

sal, VBAT1 applied

— Scan

— Forward disconnect

— Ring mode

s Unlatched parallel data control interface

s Ultralow SLIC power:

— Scan 38 mW (VCC = 5 V)

— Forward/reverse active 57 mW (VCC = 5 V)

— Scan 27 mW (VCC = 3.3 V)

— Forward/reverse active 42 mW (VCC = 3.3 V)

s Supervision:

— Loop start, fixed threshold with hysteresis

— Ring trip, single-pole ring trip filtering, fixed thresh-

old as a function of battery voltage

— Common-mode current for ground key applica-

tions, user-adjustable threshold

s Adjustable current limit:

— 10 mA to 70 mA programming range

s Overhead voltage:

— Clamped typically <51 V differentially

— Clamped maximum <56.5 V single-ended

— Adjustable in active mode

s Thermal shutdown protection with hysteresis

s Longitudinal balance:

— ETSI/ITU-T balance

— Telcordia Technologies GR-909 balance

s Meter pulse compatible:

— Dedicated meter pulse signal input

— On-hook transmission of PPM

s ac interface:

— Two SLIC gain options to minimize external com-

ponents required for interface to first- or third-gen-

eration codecs

— Sufficient dynamic range for direct coupling to

codec output

s 32-pin PLCC package/48-pin MLCC package

s 90 V CBIC-S technology

Description

The L9215 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 L9215 offers 11 operating states. The device

assumes use of a lower-voltage talk battery, a higher-

voltage ringing battery, and a VCC supply.

The L9215 requires only a positive VCC supply. No

–5 V supply is needed. The L9215 can operate with a

VCC of either 5 V or 3.3 V, allowing for greater user flex-

ibility. The choice of VCC 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 (VBAT1).

VBAT1 is a maximum –75 V. VBAT1 is used for power

ring signal amplification and for scan and on-hook

transmission modes. This supply is current limited

to approximately the maximum power ringing cur-

rent, typically 50 mA.

2. A lower-voltage talk battery (VBAT2).

VBAT2 is used for active mode powering.

4

Agere Systems Inc.

Share Link: