STLC5048 datasheet(1/45 Pages) STMICROELECTRONICS

No de pièce	STLC5048

Description	FULLY PROGRAMMABLE FOUR CHANNEL CODEC AND FILTER

PDF	45 Pages

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Fabricant	STMICROELECTRONICS [STMicroelectronics]

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STLC5048

January 2003

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FULLY PROGRAMMABLE MONOLITHIC 4

CHANNEL CODEC/FILTER

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SINGLE +3.3V SUPPLY

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A/m LAW PROGRAMMABLE

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LINEAR CODING (16 BITS) OPTION

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PCM HIGHWAY FORMAT AUTOMATICALLY

DETECTED:1.536 or 1.544 MHz2.048, 4.096,

8192 MHz

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TWO PCM PORTS AVAILABLE

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TX GAIN PROGRAMMING: 33dB RANGE;

<0.01dB STEP

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RX GAIN PROGRAMMING:42dB RANGE;

<0.01dB STEP

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PROGRAMMABLE SLIC INPUT IMPEDANCE

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PROGRAMMABLE TRANSHYBRID BALANCE

FILTER

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PROGRAMMABLE EQUALIZATION

(FREQUENCY RESPONSE)

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PROGRAMMABLE TIME SLOT ASSIGNMENT

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DIGITAL AND ANALOG LOOPBACKS

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SLIC CONTROL PORTSTATIC (16 I/Os)

DYNAMIC (12 I/Os + 4 CS)

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BUILT-IN TEST MODE WITH TONE

GENERATION, MCU ACCESS TO PCM DATA

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64 TQFP (10X10mm) PACKAGE

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PROGRAMMABLE SLIC LINE CURRENT

LIMITATION

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PROGRAMMABLE SLIC OFF-HOOK

DETECTION THRESHOLD

DESCRIPTION

The STLC5048 is a monolithic fully programmable 4

channel CODEC and filter. It operates with a single

+3.3V supply.

The analog interface is based on a receive output

buffer driving the SLIC RX input and on an amplifier

input stage normally driven by the SLIC TX output.

Due to the single supply voltage a midsupply refer-

ence level is generated internally by the device and

all analog signals are referred to this level (AGND).

The PCM interface uses one common 8KHz frame

sync. pulse for transmit and receive direction. The bit

clock is automatically detected between four stan-

dards:

1.563/1.544MHz,

2.048MHz,

4.096MHz,

8192MHz.

Two PCM port are provided: the channels can be

connected to port A or/and B.

Device programmability is achieved

by means of

several registers and commands allowing to set the

different parameters like TX/RX gains, line imped-

ance, transhybrid balance, equalization (frequency

response), encoding law (A/

µ), time slot assignment,

independent channels power up/down, loopbacks,

PCM bits offset.

The STLC5048 can be programmed via serial inter-

face running up to 8 MHz. One interrupt output pin is

also provided.

A GUI interface is also available to emulate and pro-

gram the coefficients for impedance synthesis, echo

cancelling and channel filtering.

TQFP64 (10x10mm)

ORDERING NUMBER: STLC5048

FULLY PROGRAMMABLE

FOUR CHANNEL CODEC AND FILTER

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