The TCM37C14A and TCM37C15A are single-chip PCM combos with programmable gain control. 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.
The TCM37C14A and TCM37C15A are single‑chip PCM combos that perform transmit encoding (A/D) and receive decoding (D/A) with programmable gain control. They support CCITT/(D3/D4) G.711 and G.714 standards and are intended for line interface in digital telephone systems, subscriber line concentrators, and related applications.
Both devices operate from –40 °C to 85 °C, consume low power (typical 7 mW in operating mode, 0.5 mA in power‑down), and are offered in 24‑pin DW‑SOIC (TCM37C14A) or 20‑pin DW‑SOIC / N‑PDIP (TCM37C15A) packages. Key features include programmable transmit/receive gain, differential output (TCM37C14A), and selectable master clock frequencies of 1.536 MHz, 1.544 MHz, or 2.048 MHz.
| Supply voltage (Voc) | 4.75 V – 5 V – 5.25 V |
|---|---|
| Standby power‑down current | 0.5 mA (typical) |
The recommended supply voltage (Voc) is 5 V, with typical limits of 4.75 V minimum and 5.25 V maximum.