Purchase Bt8954, In-stock Bt8954 From SeekIC.
Part Number: Bt8954
Description: The Bt8954 framer has been tailored specifically to meet the needs of voice pair gain systems (also referred to as "cab...
- Table of contents:
Bt8954
-
Suppliers
DataSheet
General Description
Bt8954 General Description
The Bt8954 framer has been tailored specifically to meet the needs of voice pair gain systems (also referred to as "cable relief systems" and "digital subscriber line carriers") by providing a direct connection to the DSL modem and the CODEC. It performs data, clock, and format conversions necessary to construct a Pulse Code Multiplexed (PCM) channel from a Symmetrical Digital Subscriber Line (SDSL) or a High-Bit-Rate Digital Subscriber Line (HDSL) channel. The PCM channel consists of transmit and receive data, clock, and frame sync signals configured for 218 voice channels. The PCM channel connects directly to popular PCM codecs. The Digital Subscriber Line (DSL) channel interface consists of serial data and clock connected to a RS8973, Bt8970 or a Bt8960 DSL Transceiver. The Bt8954 supports clear and compressed voice system. When coupled with a Bt8960, the Bt8954 provides PCM4 functions at greater than 5 km reach with no voice compression, allowing V.34 modem operation.
At one end, Bt8954 multiplexes payload data from several PCM codecs with the appropriate overhead and signaling bits into one transport frame that is passed on to the bit-pump, for transport over a single twisted pair. At the other end, Bt8954 demultiplexes the DSL bit stream into payload data sent to the PCM codec, and overhead data written into microcomputer-accessible registers.
Embedded Operations Channel (EOC) and signaling overhead can be inserted via the Microcomputer Interface (MCI). Control and status registers are accessed via the MCI. One common register group configures the PCM interface formatter, Phase-Locked Loop (PLL), and PCM Loopback (LB). Another group of DSL channel registers configures the elastic store FIFOs, overhead muxes, receive framer, payload mapper, and the DSL loopback. Status registers monitor received overhead, PLL, FIFO, and framer operations, including CRC and FEBE error counts.
Bt8954 Maximum Ratings
| Symbol | Parameter | Minimum | Maximum | Units |
| VDD | Supply Voltage | 0.3 | 7 | V |
| VI | Voltage on Any Signal Pin | 1.0 | VDD+0.3 | V |
| TST | Storage Temperature | 40 | 125 | °C |
| TVSOL | Vapor Phase Soldering Temperature (1 minute) | - | 220 | °C |
| JA | Thermal Resistance (68 PLCC), Still Air | - | 39.8 | °C/W |
| NOTE(S): Stresses greater than those listed in this table may cause permanent damage to the device. This is a stress rating only. Functional operation of the device at these or any other conditions beyond those listed in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. | ||||
Bt8954 Features
• Voice Pair Gain Framer
Frames and transports PCM data streams over 1218,000 ft. (3.75.5 km) distances when coupled with Bt8960 or Bt8970
• PCM Interface
Supports popular PCM codecs
Programmable payload to support 218 64 kbps voice channels
2.048, 1.536 MHz PCM reference clock generation
6.144, 8.192, 20.48 MHz ADPCM reference clock generation
• DSL Interface
Connects to Bt8960 or Bt8970
Supports 1601168 kbps bit rates
Error performance monitoring
Auto tip/ring reversal
• Microcomputer Interface
Glueless interface to Intel 8051 and Motorola 68302 processors
Access to overhead and signaling registers
• Supports ADPCM codecs (32 kbps)
• PCM and DSL loopbacks
• CMOS technology, 5 V operation
• Low-power operation
Enables compatibility with line-powered systems
• 68-pin PLCC
• JTAG/IEEE Std 1149.1-1990
• 40 °C to +85 °C operation
Frames and transports PCM data streams over 1218,000 ft. (3.75.5 km) distances when coupled with Bt8960 or Bt8970
• PCM Interface
Supports popular PCM codecs
Programmable payload to support 218 64 kbps voice channels
2.048, 1.536 MHz PCM reference clock generation
6.144, 8.192, 20.48 MHz ADPCM reference clock generation
• DSL Interface
Connects to Bt8960 or Bt8970
Supports 1601168 kbps bit rates
Error performance monitoring
Auto tip/ring reversal
• Microcomputer Interface
Glueless interface to Intel 8051 and Motorola 68302 processors
Access to overhead and signaling registers
• Supports ADPCM codecs (32 kbps)
• PCM and DSL loopbacks
• CMOS technology, 5 V operation
• Low-power operation
Enables compatibility with line-powered systems
• 68-pin PLCC
• JTAG/IEEE Std 1149.1-1990
• 40 °C to +85 °C operation
Bt8954 Typical Application
• Voice Pair Gain Systems (Clear)
PCM2, PCM4(PCM1+3), PCM6,
PCM8, PCM10/11, PCM12, PCM18
• ADPCM Voice Pair Gain Systems (Compressed)
ADPCM12, ADPCM24, ADPCM36
PCM2, PCM4(PCM1+3), PCM6,
PCM8, PCM10/11, PCM12, PCM18
• ADPCM Voice Pair Gain Systems (Compressed)
ADPCM12, ADPCM24, ADPCM36
Bt8954 Connection Diagram
BT8954
PDF/DataSheet Download
- Datasheet: BT8954
- File Size: 1129472 KB
- Manufacturer: CONEXANT [Conexant Systems, Inc]
- Click here to Download
- ·BT8028
- INTEGRAL [Integral Corp.]
- SIMPLE MELODY GENERATOR
- 213251 KB
- ·BT8028C-001
- INTEGRAL [Integral Corp.]
- SIMPLE MELODY GENERATOR
- 213251 KB
- ·BT8028C-002
- INTEGRAL [Integral Corp.]
- SIMPLE MELODY GENERATOR
- 213251 KB
- ·BT8028C-003
- INTEGRAL [Integral Corp.]
- SIMPLE MELODY GENERATOR
- 213251 KB
- ·BT8028C-004
- INTEGRAL [Integral Corp.]
- SIMPLE MELODY GENERATOR
- 213251 KB
- ·BT8028C-005
- INTEGRAL [Integral Corp.]
- SIMPLE MELODY GENERATOR
- 213251 KB
- ·BT8028C-006
- INTEGRAL [Integral Corp.]
- SIMPLE MELODY GENERATOR
- 213251 KB
- ·BT8028C-007
- INTEGRAL [Integral Corp.]
- SIMPLE MELODY GENERATOR
- 213251 KB
Bt8954 Relative Products
Bt869
The Bt868/869 is specifically designed for video systems requiring the generation of high-quality flicker-free composite and Y/C (S-video) signals from various YCrCb or RGB digital streams. The Bt868/869 accepts any input format from 640 x 480 to 800 x 600 r...
Bt868
The Bt868/869 is specifically designed for video systems requiring the generation of high-quality flicker-free composite and Y/C (S-video) signals from various YCrCb or RGB digital streams. The Bt868/869 accepts any input format from 640 x 480 to 800 x 600 r...
Bt865A
BT864A
Bt861
BT860KRF
The BT860KRF is designed as one kind of multiport YCrCb to NTSC/PAL /SECAM digital video encoder that can be used in (1)Digital cable television systems; (2)Satellite TV receivers (DBS/DVB/DSS); (3)DVD players; (4)Video CD players; (5)Digital cameras; (6)PC ...
Hotspot Suppliers Product
LM239DR
Price: 0.1-0.5 USD
quad differential comparator, SOIC, Low Output Saturation Voltage, Low Input Bias Current, 25 nA Typ
MAX1896EUT-T
Price: 1-100000000 USD
1.4MHz, SOT23, Current-Mode Step-Up DC-DC Converter, 2.6V to 5.5V Input Range
GT300AL-20
Price: 1-2 USD
Integrated Circuit, 1.0kV, 2.5kA, Mitsubishi Electric Semiconductor, GT300AL-20
G2R-1-24VDC
Price: 0.8-1.1 USD
Power Relay, DIP, 12 VAC, 93 mA, High-sensitivity, Omron Electronics LLC
ERJ8ENF35R7V
Price: 0.1-100 USD
SMD, precision thick film chip resistor, High reliability, three layer
GT-48310B-B-0
Price: 2-3 USD
GT-48310B-B-0, BGA, GalileoTechnology
H11N2
Price: 0.3-1 USD
6-pin DIP, high speed logic optocoupler, High data rate, 5 MHz typical, High common mode
SN74AHC123APWR
Price: 0.15-0.2 USD
dual retriggerable monostable multivibrator, -0.5 V to 7 V, TSSOP-16, ESD Protection, output pulse...
TPS61010DGSR
Price: 0.1-100 USD
boost converter, 10MSOP, 1.5 V ~ 3.3 V, 200mA, 500kHz, TPS61010DGSR, Texas Instruments
DS1245Y-120
Price: 1.398-1.42 USD
DIP32, 1024k nonvolatile SRAM, 70 ns, Low-power CMOS, 6.0V
MRF151G
Price: 110-115 USD
MOSFET, TO-9, 50 V, 300 W, high power, high gain, N-Channel, Efficiency-50%
LA25-NP
Price: 20-25 USD
Current Transducer, LEM, 25A
