The DS21352/552 T1 single-chip transceiver contains all of the necessary functions for connection to T1 lines whether they are DS1 long haul or DSX–1 short haul. The clock recovery circuitry automatically adjusts to T1 lines from 0 feet to over 6000 feet in length. The device can generate both DSX–1 line build outs as well as CSU line build-outs of -7.5dB, -15dB, and -22.5dB. The onboard jitter attenuator (selectable to either 32 bits or 128 bit) can eliminate the jitter caused by long-distance transmission, ensuring the quality of the received signal.
The document describes the DS21352 (3.3V) and DS21552 (5V) T1 single-chip transceivers designed for connection to T1 lines as either DS1 long haul or DSX-1 short haul interfaces. These devices contain all necessary functions for line interface, including clock recovery, jitter attenuation, framing, and signaling generation/detection.
| Supply Voltage | 3.3V (DS21352) or 5V (DS21552) |
|---|---|
| Package Type | 100-pin LQFP package (14 mm x 14 mm) |
| Operating Temperature Range | -40°C to +85°C (LN suffix) |
| Clock Output Frequency | 8.192MHz |
The primary difference is the supply voltage; DS21352 operates at 3.3V while DS21552 operates at 5V.
Yes, it includes a crystal-less jitter attenuator.