Datasheet > FX614

FX614

更新时间： 2022-12-11 23:58:20

品牌	Logo	应用领域
CMLMICRO		调制解调器半导体
页数	文件大小	规格书
17页	334K
描述
CML Semiconductor Products Bell 202 Compatible Modem

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FX614 数据手册

Bell 202 Compatible Modem

FX614

D4/P3

Signal

Description

Pin No.

Name

V_BIAS

Type

O/P

Internally generated bias voltage, held at V /2

when the device is not in 'Zero-Power' mode.

Should be decoupled to V

by a capacitor

mounted close to the device pins.

RXEQ

TXD

I/P

A logic level input for enabling/disabling the

equaliser in the receive filter. See section 1.5.4.

A logic level input for either the raw input to the

FSK Modulator or data to be re-timed depending

on the state of the M0, M1 and CLK inputs. See

section 1.5.9.

CLK

RXD

I/P

A logic level input which may be used to clock

data bits in or out of the FSK Data Retiming

block.

O/P

A logic level output carrying either the raw

output of the FSK Demodulator or re-timed

characters depending on the state of the M0, M1

and CLK inputs. See section 1.5.8.

DET

O/P

A logic level output of the on-chip Energy Detect

circuit.

RDYN

"Ready for data transfer" output of the on-chip

data retiming circuit. This open-drain active low

output may be used as an Interrupt

Request/Wake-up input to the associated mC.

An external pull-up resistor should be connected

between this output and V

V_DD

Power The positive supply rail. Levels and thresholds

within the device are proportional to this voltage.

Should be decoupled to V

by a capacitor

mounted close to the device pins.

Notes: I/P

Input

O/P = Output

This device is capable of detecting and decoding small amplitude signals. To achieve this V_DDand V_BIAS

decoupling and protecting the receive path from extraneous in-band signals are very important. It is

recommended that the decoupling capacitors are placed so that connections between them and the device

pins are as short as practicable. A ground plane protecting the receive path will help attenuate interfering

signals.

ã 1997 Consumer Microcircuits Limited

D/614/4

1 2 345 6 7...17

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