w681511 판매점 - SINGLE-CHANNEL VOICEBAND CODEC

W681511

1. GENERAL DESCRIPTION

The W681511 is a general-purpose single channel PCM CODEC with pin-selectable µ-Law or A-Law

companding. The device is compliant with the ITU G.712 specification. It operates off of a single +5V

power supply and is available in 20-pin PDIP, SOG, SSOP, and TSSOP package options. Functions

performed include digitization and reconstruction of voice signals, and band limiting and smoothing

filters required for PCM systems. The filters are compliant with ITU G.712 specification. W681511

performance is specified over the industrial temperature range of –40°C to +85°C.

The W681511 includes an on-chip precision voltage reference and an additional power amplifier,

capable of driving 300Ω loads differentially up to a level of 6.3V peak-to-peak. The analog section is

fully differential, reducing noise and improving the power supply rejection ratio. The data transfer

protocol supports both long-frame and short-frame synchronous communications for PCM

applications, and IDL and GCI communications for ISDN applications. W681511 accepts seven

master clock rates between 256 kHz and 4.096 MHz, and an on-chip pre-scaler automatically

determines the division ratio for the required internal clock.

For fast evaluation and prototyping purposes, the W681511DK development kit is available.

2. FEATURES

• Single +5V power supply

• Typical power dissipation of 25 mW,

power-down mode of 0.5 µW

• Fully-differential analog circuit design

• On-chip precision reference of 1.575 V for

a 0 dBm TLP at 600 Ω

• Push-pull power amplifiers with external

gain adjustment with 300 Ω load capability

• Seven master clock rates of 256 kHz to

4.096 MHz

• Pin-selectable µ-Law and A-Law

companding (compliant with ITU G.711)

• CODEC A/D and D/A filtering compliant

with ITU G.712

• Industrial temperature range (–40°C to

+85°C)

• Package: 20-pin SOG

APPLICATIONS

• Digital Telephone Systems

• Central Office Equipment (Gateways,

Switches, Routers)

• PBX Systems (Gateways, Switches)

• PABX/SOHO Systems

• Local Loop card

• SOHO Routers

• VoIP Terminals

• Enterprise Phones

• ISDN Terminals

• Analog line cards

• Digital Voice Recorders

-2-

w681511 반도체 회로 부품 판매점

SINGLE-CHANNEL VOICEBAND CODEC

국내 전력반도체 판매점

일반적인 전자부품 판매점

관련 데이터시트