This datasheet introduces the features of the DS2154L/L+ E1 (CEPT) PCM-30/ISDN-PRI Transceiver.
The DS2154 is an enhanced E1 (CEPT) PCM‑30/ISDN‑PRI transceiver that integrates line interface, jitter attenuation, framing, and extensive control registers. It supports both 75 Ω coax and 120 Ω twisted‑pair lines, offers 32‑bit or 128‑bit crystal‑less jitter attenuation, and provides independent transmit and receive paths with elastic stores and multiple loopback modes.
The device is supplied in a 100‑pin LQFP package, operates from a 5 V supply, and includes a current‑limiting driver that restricts output to less than 50 mA RMS into a 1 Ω load. Detailed pin descriptions, timing diagrams, AC/DC characteristics, and register maps are provided for hardware designers and system integrators.
| Package | 100‑Pin LQFP (14 mm × 14 mm) |
|---|---|
| Operating Temperature Range (DS2154L) | 0 °C to +70 °C |
| Operating Temperature Range (DS2154LN) | -40 °C to +85 °C |
| Supply Voltage | 5 V (±5 %) |
| Current Limiter | < 50 mA RMS into 1 Ω load |
| Jitter Attenuator Depth | 32‑bit or 128‑bit |
| Maximum Clock Frequency | 8.192 MHz |
| Receive Sensitivity | 0 dB to –43 dB |
The DS2154L operates from 0 °C up to +70 °C.
The line driver limits the current to less than 50 mA RMS into a 1 Ω load.
The device provides a 32‑bit or a 128‑bit crystal‑less jitter attenuator.
The DS2154 can operate with a clock up to 8.192 MHz.