DS3181 Maxim Integrated Products, DS3181 Datasheet - Page 176

• Manufacturer Part Number: DS3181
• Description: Network Controller & Processor ICs DS3-E3 ATM-Packet PH Y with Built-in Line
• Manufacturer: Maxim Integrated Products

Specifications of DS3181

• Product: Framer
• Number Of Transceivers: 1
• Data Rate: 44.736 Mbps
• Supply Voltage (max): 3.465 V
• Supply Voltage (min): 3.135 V
• Supply Current (max): 280 mA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Package / Case: TEBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

not match its expected value (up to 10 per frame. A word error increments the count once for each FAS that does
not match its expected value (up to 1 per frame).
The receive alarm indication (RAI) signal is high when one or more of the indicated alarm conditions is present, and
low when all of the indicated alarm conditions are absent. Setting the receive alarm indication on LOS, OOF, LOF,
or AIS is individually programmable (on or off).
10.10.7.6.3 Receive G.751 E3 Overhead Extraction
Overhead extraction extracts all of the E3 overhead bits from the G.751 E3 frame. The FAS, A bit, and N bit are
output on the receive overhead interface (ROH, ROHSOF, and ROHCLK). In addition, the A bit is integrated and
stored in a register along with a change indication, and can be output over the receive FEAC controller. The N bit is
integrated and stored in a register along with a change indication, is sent to the receive HDLC overhead controller,
and can also be sent to the receive FEAC controller. The bit sent to the receive FEAC controller is programmable
(A or N).
10.10.7.6.4 Receive G.751 Downstream AIS Generation
Downstream G.751 E3 AIS can be automatically generated on an OOF, LOS, or AIS condition or manually
inserted. If automatic downstream AIS is enabled, downstream AIS is inserted when a LOS, OOF, or AIS condition
is declared. Automatic downstream AIS is programmable (on or off). If manual downstream AIS insertion is
enabled, downstream AIS is inserted. Manual downstream AIS insertion is programmable (on or off). Downstream
AIS is removed when all OOF, LOS, and AIS conditions are terminated and manual downstream AIS insertion is
disabled. RPDT will be forced to all ones during downstream AIS.
10.10.8 G.832 E3 Framer/Formatter
10.10.8.1 Transmit G.832 E3 Frame Processor
The G.832 E3 frame format is shown in
Figure 10-44. G.832 E3 Frame Format
FA1
EM
MA
GC
TR
NR
FA2
Figure
530 Byte Payload
10-44.
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