bt8375kpf Conexant Systems, Inc., bt8375kpf Datasheet
bt8375kpf
Manufacturer Part Number
bt8375kpf
Description
Single Chip Transceivers For T1/e1 And Integrated Service Digital Network Isdn Primary Rate Interfaces Systems
Manufacturer
Conexant Systems, Inc.
Datasheet
1.BT8375KPF.pdf
(323 pages)
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Bt8370/8375/8376
Fully Integrated T1/E1 Framer and Line Interface
The Bt8370/8375/8376 is a family of single chip transceivers for T1/E1 and Integrated
Service Digital Network (ISDN) primary rate interfaces, operating at 1.544 Mbps or
2.048 Mbps. These devices combine a sophisticated framer, transmit and receive slip
buffers, and an on-chip physical line interface to provide a complete T1/E1 transceiver.
programmable clock rate adapter for simplifying system bus interfacing. The adapter
synthesizes standard clock signals from the receive or transmit line rate clocks or from an
external reference.
microprocessor port. Current ANSI, ETSI, ITU-T, and Bellcore standards are supported for
alarm and error monitoring, signaling supervision (e.g., LAPD/SS7), per-channel trunk
conditioning, and Facility Data Link (FDL) maintenance. A serial Time Division Multiplexed
(TDM) system bus interface allows the backplane Pulse Code Modulation (PCM) data
highway to operate at rates from 1.536 to 8.192 Mbps. Extensive test and diagnostic
functions include a full set of digital and analog loopbacks, PRBS test pattern generation,
BER meter, and forced error insertion.
The physical line interface circuit recovers clock and data from analog signals with +3 to
–43 dB cable attenuation, appropriate for both short (–18 dB) and long-haul T1/E1
applications. Receive line equalization (EQ) and transmit Line Build Out (LBO) filters are
implemented using Digital Signal Processor (DSP) circuits for reliable performance. Data
and/or clock jitter attenuation can be inserted on either the receive or transmit path. The
transmit section includes precision pulse shaping and amplitude pre-emphasis for cross
connect applications, as well as a set of LBO filters for long-haul Channel Service Unit
(CSU) applications. A complementary driver output is provided to couple 75/100/120
lines via an external transformer.
Functional Block Diagram
Data Sheet
Transmit
Receive
Analog
Analog
The fully featured Bt8370 and short-haul Bt8375 and Bt8376 devices provide a
Operations are controlled through memory-mapped registers accessible via a parallel
RX
Test Port
RPLL
TPLL
JTAG
TX
Pulse
LBO
EQ
Processor Bus
Control/Status
Motorola/Intel
Registers
Attenuator
TX or RX
Jitter
Data Link Controllers
Dual-Rail/NRZ/
Decode
Encode
External DL3
ZCS
ZCS
DL1 + DL2
Overhead
Receive
Insertion
Framer
T1/E1
Clock Rate
CLAD I/O
Adaptor
Transmit
Buffer
Buffer
Framer
Slip
T1/E1
RX
Slip
TX
Receive
System
Bus
Transmit
System
Bus
Distinguishing Features
• Single-chip T1/E1 framer with
• Frames to popular T1/E1 standards:
• On-chip physical line interface
• Two-frame transmit and receive PCM
• Clock rate adapter synthesizes jitter
• Parallel 8-bit microprocessor port
• Automated Facility Data Link (FDL)
• BERT generation and counting
• Two full-duplex HDLC controllers for
• B8ZS/HDB3/Bit 7 zero suppression
• 80-pin MQFP surface-mount package
• Operates from a single +5 Vdc ±5%
• Low-power CMOS technology
Applications
• T1/E1 Channel Service Unit/Data
• Digital Access Cross-Connect
• T1/E1 Multiplexer (MUX)
• PBXs and PCM channel bank
• T1/E1 HDSL terminal unit
• ISDN Primary Rate Access (PRA)
short/long-haul physical line
interface
– T1: SF, ESF, SLC 96, T1DM
– E1: PCM
compatible with:
– DSX-1/E1 short-haul signals
– DS-1 (T1.403) and ETSI long-haul
slip buffers
attenuated system clocks from an
internal or external reference
supports Intel or Motorola buses
management
data link and LAPD/SS7 signaling
power supply
Service Unit (CSU/DSU)
Systems (DACS)
ISDN primary rate
signals
-
30, G.704, G.706, G.732
June 30, 1999
N8370DSE
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