TCM320AC54

` Complete PCM Codec and Filtering System Includes:
  Transmit High-Pass and Low-Pass Filtering
  Receive Low-Pass Filter With (sin x)/x Correction
  Active RC Noise Filters
  m-Law Compatible Coder and Decoder
  Internal Precision Voltage Reference
  Serial I/O Interface
  Internal Autozero Circuitry
` m-Law Coding
` DTAD and DSP Interface Codec
` ±5-V Operation
` Low Operating Power . . . 50 mW Typ
` Power-Down Standby Mode . . . 3 mW Typ
` Automatic Power Down
` TTL- or CMOS-Compatible Digital Interface
` Maximizes Line Interface Card Circuit Density

Supply voltage, V_CC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Supply voltage, V_BB (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Voltage range at any analog input or output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . V_CC +0.3 V to V_BB 0.3 V
Voltage range at any digital input or output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V_CC +0.3 V to ANLG GND 0.3 V
Continuous total dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  See Dissipation Rating Table
Operating free-air temperature range, T_A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  0 to 70
Storage temperature range,T _stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  65 to 150
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . .  .  . . . . .  260

† Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTE 1: All voltages are with respect to GND.

The TCM320AC54 is comprised of a single-chip PCM codec (pulse-code-modulated encoder and decoder) and PCM line filter. This device provides all the functions required to interface a full-duplex (2-wire) voice telephone
circuit with a TDM (time-division-multiplexed) system. Primary applications include:

• Line interface for digital transmission and switching of T1 carrier, PABX, and central office telephone systems
• Subscriber line concentrators
• Digital-encryption systems
• Digital signal processing

The device is designed to perform the transmit encoding (A/D conversion) and receive decoding (D/A conversion) as well as the transmit and receive filtering functions in a PCM system. It is intended to be used at the analog termination of a PCM line or trunk. The device requires two transmit and receive master clocks that may be asynchronous (1.536 MHz, 1.544 MHz, or 2.048 MHz), transmit and receive data clocks that are synchronous with the master clock (but can vary from 64 kHz to 2.048 MHz), and transmit and receive frame-sync pulses. The TCM320AC54 provides the band-pass filtering of the analog signals prior to encoding and after decoding of voice and call progress tones.

The TCM320AC54 is characterized for operation from 0 to 70.