STANDARD PRODUCT
PM4351 COMET
DATA SHEET
PMC-1970624
ISSUE 10
COMBINED E1/T1 TRANSCEIVER
• Available in a high density 80-pin MQFP (14 mm by 14 mm) package or an
81-ball CABGA (9 mm by 9 mm) package.
• Provides a -40°C to +85°C Industrial temperature operating range.
1.1
Receiver section:
• Guaranteed T1 signal reception for distances with up to 36 dB of cable
attenuation under production test conditions (772 kHz, VDD = 3.069V and
25°C) using PIC 22 gauge cable emulation.
• Guaranteed E1 signal reception for distances with up to 36 dB of cable
attenuation under production test conditions (1.024 MHz, VDD = 3.069V and
25°C) using PIC 22 gauge cable emulation.
• Recovers clock and data using a digital phase locked loop for high jitter
tolerance.
• Provides an alternative digital interface for applications without line interface
units.
• Frames to ITU-T G.704 basic and CRC-4 multiframe formatted E1 signals.
The framing procedures are consistent ITU-T G.706 specifications.
• Frames to DSX/DS-1 signals in D4, SF, ESF and SLC®96 formats.
• Frames to TTC JT-G704 multiframe formatted J1 signals. Supports the
alternate CRC-6 calculation for Japanese applications.
• Frames in the presence of and detects the “Japanese Yellow” alarm.
• Tolerates more than 0.3 UI peak-to-peak, high frequency jitter as required by
AT&T TR 62411 and Bellcore TR-TSY-000170.
• Detects violations of the ANSI T1.403 12.5% pulse density rule over a moving
192-bit window.
• Provides loss of signal detection as per ITU-T G.775 and ANSI T1.231. Red,
Yellow, and AIS alarm detection and integration are according to ANSI T1.231
specifications.
• Provides programmable in-band loopback activate and deactivate code
detection.
PROPRIETARY AND CONFIDENTIAL
2
PMC [ PMC-SIERRA, INC ]
