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ST75C530

SUPER INTEGRATED DEVICES WITH DSP, AFE & MEMORIES FORTELEPHONY, MODEM, FAX OVERINTERNET & POTS LINES

STMicroelectronics 

ST75C530 - ST75C540

I - DETAILED FEATURES

Single Chip Fax

- ITU-T V.17, V.29, V.27ter, V.21 with Fax support

- V.17 , V.29 (T104 ), V.2 7te r sho rt tra in s,

V.33 half-duplex

- V.21 flag detection and 4 tone detection during

high speed reception modes

- V.21 flag detection, DTMF detection and 4

tone detection duringV.21 channel 2 reception

modes

- Programmable call progress and call waiting

detection

- Parallel data handling

- HDLC and UART framing support

- 1700Hz and 1800Hz carrier

- Full implementation of the V.17, V.33, V.29 and

V.27 handshakes

- 0 to -15dBm programmable transmit power

- 0 to -47dBm receiver dynamic range (ST75C530)

0 to-45dBm receiver dynamic range (ST75C540)

Full Duplex Data Modem

- ITU-T V.32bis, V.32 (14400, 12000, 9600, 7200,

4800bps) (*)

- Maximum round trip delay : 1.2s (satellite hops)

(*)

- Up to 10Hz of phase roll on far end echo (*)

- ITU-T V.22bis, V.22 (2400, 1200bps) (*)

- V.32bis/V.32/V.22bis/V.22automode (*)

- ITU- V.23, V.21, bell 103 full-duplex,

Bell202 demodulator

- -10 to -25dBm programmable transmit power

- -10 to -38dBm receiver dynamic range (*)

- HDLC and UART framing support

- Train based on quality line sampling (*)

(*) ST75C540 only

Digital Answering Machine

- Low bit rate speech coder (4800bps)

- Variable playback speed (+50% to -50%)

- ARAM compatibility (error correction)

- ADPCM 32, 24, 16Kbps

- Line echo cancellation

- Voice activity detector

- Concurrent DTMF and tone detection

Handset Mode

- Rx and Tx AGC versus line current for line

losses compensation comply with most of

country regulations

- Dynamic limiter in transmit path to prevent

distortion

- Two way conversation recording

Hands-free Mode

- Full duplex speakerphone using LMS adaptative

filtering including line echo cancellation and

acoustic echo cancellation

- Rx and Tx AGC versus line current for line

losses compensation comply with most of

country regulations

- Dynamic limiter in transmit path to prevent

distortion

- Loudspeaker volume control

- Two way conversation recording

Extended Modes of Operations

- Programmable ring detection

- 16 programmable tone detectors

- Tone and DTMF generators

- Caller ID reception

- Transparent mode allowing direct transfer of Mo-

dem AFE and audio AFE samples to and from

host processor for soft Modem applications and

sound files playing

- DTMF detection

- Wide dynamic range (>48dB)

Versatile Interfaces

- Parallel 128 x 8-bit dual port RAM

- General purpose 16 I/O ports

- 2 relay drive outputs

- Full diagnostic capability

- Dual 8-bit DAC for constellation display

Single 5V Power Supply

- Typical active power consumption :

650mW (ST75C530), 725mW (ST75C540)

- Low power mode < 30mW

4/84

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