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DESCRIPTION

The ETC5064 (?-law), ETC5067 (A-law) are mono lithic PCM CODEC/FILTERS utilizing the A/D and D/A conversion architecture shown in the Block Diagrams and a serial PCM interface. The devices are fabricated using double-poly CMOS process.

■ COMPLETE CODEC AND FILTERING SYSTEM INCLUDING :

- Transmit high-pass and low-pass filtering.

- Receive low-pass filter with sin x/x correction.

- Active RC noise filter.

- ?-law or A-law compatible CODER and DECODER.

- Internal precision voltage reference.

- Serial I/O interface.

- Internal auto-zero circuitry.

- Receive push-pull power amplifiers.

■ ?-LAW ETC5064

■ A-LAW ETC5067

■ MEETS OR EXCEEDS ALL D3/D4 AND CCITT SPECIFICATIONS.

■ ± 5 V OPERATION.

■ LOW OPERATING POWER-TYPICALLY 70 mW

■ POWER-DOWN STANDBY MODE-TYPICALLY 3 mW

■ AUTOMATIC POWER DOWN

■ TTL OR CMOS COMPATIBLE DIGITAL INTERFACES

■ MAXIMIZES LINE INTERFACE CARD CIRCUIT DENSITY

■ 0°C TO 70°C OPERATION: ETC5064/67

■ –40°C TO 85°C OPERATION: ETC5064-X/67-X