DS2180AQN+T&R Maxim Integrated Products, DS2180AQN+T&R Datasheet - Page 28

• Manufacturer Part Number: DS2180AQN+T&R
• Description: IC TRANSCEIVER T1 44-PLCC
• Manufacturer: Maxim Integrated Products

Specifications of DS2180AQN+T&R

• Function: Transceiver
• Interface: T1
• Number Of Circuits: 1
• Voltage - Supply: 4.5 V ~ 5.5 V
• Current - Supply: 3mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 44-LCC, 44-PLCC
• Includes: Alarm Generation and Detection, B7 Stuffing Mode, B8ZS Mode, Error Detection and Counter, "Hardware" Mode, Transparent Mode
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -

DS2180A
PROCESSOR-BASED TRANSMIT SIGNALING INSERTION Figure 23
PROCESSOR-BASED SIGNALING
Many robbed-bit signaling applications utilize a microprocessor to insert transmit signaling data into the
out-going data stream. The circuit shown in Figure 23 “decouples” the processor timing from that of the
DS2180A by use of a small FIFO memory. The processor writes to the FIFO (6 bytes are written: 3 for A
data, 3 for B data) only when signaling updates are required. The system is interrupt-driven from the
transmit multiframe sync input; the processor must update the FIFO prior to Frame 6 (625 s after
interrupt) to prevent data corruption. The application circuit shown supports 193S framing. Additional
hardware is required for 193E applications.
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