The 821004 is a single-chip, four channel PCM CODEC with on-chip filters. The device provides analog-to-digital and digital-to-analog conversions and supports both a-law and m-law companding. The digital filters in 821004 provides the necessary transmit and receive filtering for voice telephone circuit to interface with time-division multiplexed systems. All of the digital filters are performed in digital signal processors operating from an internal clock, which is derived from MCLK. The fixed filters set the transmit and receive gain and frequency response.

特性

  • 4-channel CODEC with on-chip digital filters 
  • Selectable A-law or μ-law companding 
  • Master clock frequency selection: 2.048MHz, 4.096MHz or 8.192MHz 
    • Internal timing automatically adjusted based on MCLK and frame sync signal 
  • Separate PCM and master clocks
  • Single PCM port with up to 8.192MHz data rate (128 time slots) 
  • Transhybrid balance impedance hardware adjustable via external components 
  • Transmit gains hardware adjustable via external components 
  • Low power +5.0V CMOS technology 
  • +5.0V single power supply 

产品选择

器件号 Part Status Pkg. Type Lead Count (#) Description Pb (Lead) Free Carrier Type Buy Sample
Active PLCC 32 Single-chip, 4-channel PCM CODEC with on-chip filters 是的 Tube
Availability
Active PLCC 32 Single-chip, 4-channel PCM CODEC with on-chip filters 是的 Reel
Availability

文档和下载

文档标题 language 类型 文档格式 文件大小 日期
数据手册与勘误表
821004J Datasheet 数据手册 PDF 787 KB