CX86500-26 데이터 시트보기 (PDF) - Conexant Systems

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CX86500-26

V.92/V.34/V.32bis Modem in 28-Pin or 38-Pin TSSOP with CX20493 SmartDAA®

Conexant Systems 

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CX86500 SCXV.xx Modem Data Sheet

• Selectable 28.224 MHz or 27.000 MHz frequency of operation

• Low power and voltage

− Single +3.3V supply

− Low power consumption mode

− +3.3V I/O level

• Compact, robust board design

− Small, low-profile modem packages

− SmartDAA and DIB technologies

− Reference design supports 5KV isolation

Applications

• Set top boxes

• Point-of-Sale terminals

• ATM machines

• Metering terminals

• Video game consoles

• Internet appliances

Technical Overview

General Description

Modem operation, including dialing, call progress, telephone line interface, telephone

handset interface, and host DTE interface functions are supported and controlled through

the V.250 and V.251-compatible command set.

The OEM adds a crystal circuit, DIB components, telephone line interface, telephone

handset/telephony extension interface, and other supporting discrete components as

supported by the modem model (Table 1-1) and required by the application to complete

the system.

Embedded MCU Firmware

Embedded MCU firmware performs processing of general modem control, command

sets, data modem, error correction and data compression (ECC), worldwide, V.80, and

serial DTE host interface functions according to modem models (Table 1-1).

Operating Modes

Data Modes

In V.92 data modem mode (V.92 models), the modem can receive data from a digital

source using a V.92-compatible central site modem at line speeds up to 56 kbps. With

PCM upstream enabled, data transmission supports sending data at line speeds up to

48 kbps. When PCM upstream is disabled, data transmission supports sending data at

line speeds up to V.34 rates. This mode can fallback to V.34 mode and to lower rates as

dictated by line conditions.

Conexant

102287F

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