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AR-11627 参数 Datasheet PDF下载

AR-11627图片预览
型号: AR-11627
PDF下载: 下载PDF文件 查看货源
内容描述: AccessRunner ADSL调制解调器设备设置为PCI应用 [AccessRunner ADSL Modem Device Set for PCI Applications]
分类和应用: 调制解调器PC
文件页数/大小: 24 页 / 159 K
品牌: CONEXANT [ CONEXANT SYSTEMS, INC ]
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AccessRunner
ADSL Modem Device Set for PCI Applications
Controller-less, Scalable, Discrete Multitone-based, G.dmt- and G.lite-
compliant, ADSL Modem Device Set for PCI Applications
Conexant’s AccessRunner ADSL modem device set is compliant
with the full-rate ANSI T1.413 Issue 2 and ITU G.dmt (G.992.1)
ADSL standards, and with the splitterless ITU G.lite (G.992.2)
specification. This rate-adaptive solution is designed for controller-
less PCI desktop applications and supports downstream data rates
of up to 8 Mbps and upstream data rates of up to 1 Mbps.
The device set takes advantage of the processing power available
with most new computers by eliminating the need for a separate
microcontroller, resulting in a cost-effective solution suitable for
both G.dmt and G.lite applications. Host-based software provides
support for current industry standards for PPP over AAL5 over
ATM over ADSL and RFC 1483 for Windows 98 and Windows
2000.
The device set, as shown in Figure 1, consists of four chips:
PCI bus interface (AccessRunner P46 in a 176-pin TQFP)
DMT-based data pump (AccessRunner 11627 in a 176-pin
TQFP)
Analog front end (AccessRunner 20431 in a 32-pin TQFP)
Line driver (AccessRunner 20441 in a 16-pin SSOP or
32-pin TQFP)
Features
Complete controller-less PCI ADSL
solution
Compliant with ADSL standards
Full-rate ANSI T1.413 Issue 2 and ITU
G.dmt (G.992.1) standards
Splitterless ITU G.lite (G.992.2)
specification
DMT modulation and demodulation
Full-rate adaptive modem
Maximum downstream rate of 8 Mbps
Maximum upstream rate of 1 Mbps
Supports splitterless ADSL
implementation
WAN mode support: PPP over AAL5/ATM
over ADSL via Windows 98/2000
LAN mode support: RFC 1483 via
Windows 98/2000
Compliant with PCI Local Bus
Specification, Revision 2.2
Compliant with PCI Bus Power
Management Interface Specification,
Version 1.0
Tone detection for low power mode
D20431 AFE Features
PCI Bus
Host-
Based
ADSL
Controller
Software
P46
PCI Bus
Interface
176-pin TQFP
11627
ADSL DMT
Data Pump
176-pin TQFP
20431
Analog Front
End
32-pin TQFP
20441
Line Driver
16-pin TSSOP
Telephone
Line
Figure 1. AccessRunner ADSL Modem for PCI Applications
Receive signal path includes:
Integrated hybrid receiver circuit with
programmable gain
High pass filtering and 27dB of
Automatic Gain Control (AGC) to
improve signal-to-echo ratio
14-bit ADC
Transmit signal path includes:
30dB of AGC for transmit power control
Low pass filtering to suppress noise in
the receive band
14-bit DAC
Independent digital serial data and control
interfaces
Low power tone detection mode.
Data Sheet (Preliminary)
Conexant Proprietary Information
Doc. No.100394B
October 19, 1999