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MT9125AE Datasheet(PDF) 1 Page - Mitel Networks Corporation |
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MT9125AE Datasheet(HTML) 1 Page - Mitel Networks Corporation |
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1 / 16 page  8-17 ® Features • Dual channel full duplex transcoder • 32 kbit/s and 24 kbit/s ADPCM coding, • compatible to G.721 & and G.723 (1988) and ANSI T1.303-1989 • Low power operation, total 25mW typical • Asynchronous 4.096 MHz master clock operation • Transparent ADPCM bypass capability • Serial interface for both PCM and ADPCM data streams • ST-BUS interface supported • Pin selected µ-law or A-law operation • Pin selected CCITT or sign-magnitude PCM coding • Single 5 volt power supply • Optional reset value (CCITT Table 3/G.721) capability Applications • Pair gain • Voice mail systems • Wireless set base stations Description The Dual-channel ADPCM transcoder is a low power, CMOS device capable of two encoder functions and two decoder functions. Two 64 kbit/s PCM channels are compressed into two 32 kbit/s ADPCM channels, and two 32 kbit/s ADPCM channels are expanded into two 64 kbit/s PCM channels. The 32 kbit/s ADPCM transcoding algorithm utilized conforms to CCITT Recom- mendation G.721 and ANSI T1.303-1989. The device also supports a 24 kbit/s (three bit word) algorithm (CCITT/G.723). Switching, on-the-fly, between 32 kbit/s and 24 kbit/s, is possible by toggling the appropriate Mode Select (MS1-MS4) control pins. Ordering Information MT9125AE 24 Pin Plastic DIP MT9125AP 28 Pin PLCC -40 to +85°C Figure 1 - Functional Block Diagram Timing ST-BUS Converter ADPCM I/O Transcoder 1 Transcoder 2 PCM I/O Control Decode EN1 EN2 DSTo DSTi ENB1 ENB2 VDD VSS PWRDN IC MS1 MS2 A/ µ FORMAT MS3 MS4 C2o BCLK F0i MCLK ENS ADPCMi ADPCMo ENA ISSUE 3 August 1993 MT9125 Dual ADPCM Transcoder Preliminary Information CMOS |
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Similar Description - MT9125AE |
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