TCM37C14A, TCM37C15A PCM COMBO WITH PROGRAMMABLE GAIN CONTROL

SLWS018A - JUNE 1996 - REVISED SEPTEMBER 1997

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of TexasInstruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

features

Meet CCITT/(D3/D4) Channel Bank Recommendations for Input Signals Greater than -55 dBm0
Programmable Transmit and Receive Gain Control With Pin-Selectable Gain/Attenuation Levels
Includes Differential Output on the TCM37C14A
Precision Switched-Capacitor Filters and Converters
Improved Version TCM29C13A Series COMBOs (CODEC and Filters)
Low Power CMOS
- Operating Mode...70 mW Typical
- Power-Down Mode...7 mW Typical
Internal Sample-and-Hold and Autozero Functions
Precision Internal Voltage References
TCM37C14A Features Pin-Selectable u-Law or A-Law Companding and Pin-Selectable Master Clock Rate (1.536 MHz, 1.544 MHz, and 2.048 MHz Available)
TCM37C15A is 2.048 MHz A-Law Only

description

The TCM37C14A and TCM37C15A PCM combo with programmable gain control devices are single-chip PCM combos (pulse-code-modulated CODECs with voice-band filtering). They are designed to perform transmit encoding (A/D conversion) and receive decoding (D/A conversion), as well as the transmit and receive filtering functions required to meet CCITT/(D3/D4) G.711 and G.714 specifications in a PCM system. Each device provides all the functions required to interface a full-duplex, 4-line voice telephone circuit with a TDM (time-division-multiplexed) system, and also perform the encoding and decoding of call progress tones. The TCM37C14A and TCM37C15A are based on the proven TI TCM29C13A core, and have the added feature of programmable transmit and receive gain.

Primary applications include line interface for digital transmission and switching of T1 carrier (PABX [private branch automatic exchange] and central office telephone systems), subscriber line concentrators, digital encryption systems, and digital signal processing. They are intended to be used at the analog termination of a PCM line or trunk to the POTS (plain old telephone system) local-loop line.

The TCM37C15A is available in 20-pin DW SOIC (small-outline IC) or 20-pin N PDIP (plastic dual-in-line package) packages, and the TCM37C14A is available in a 24-pin DW SOIC package and includes differential output. All are characterized for operation from -40°C to 85°C.

Title: PCM COMBO WITH PROGRAMMABLE GAIN CONTROL
Product Family: LINE - CARD CODEC (COMBO)
Device Functionality: PCM COMBO WITH PROGRAMMABLE GAIN CONTROL
Orderable Devices: TCM37C14AIDW, TCM37C14AIDWR, TCM37C15AIDW, TCM37C15AIDWR, TCM37C15AIN

View the complete PDF datasheet: slws018a.pdf (331 K Bytes) (Requires Acrobat Reader 3.x)

View more information about generic part numbers:TCM37C14, TCM37C15

Go to the Engineering Design Center to locate information on other TI Semiconductor devices.