FX604 Ver la hoja de datos (PDF) - CML Microsystems Plc

Número de pieza

componentes Descripción

Lista de partido

FX604

V23 Compatible Modem

CML Microsystems Plc 

V.23 Compatible Modem

1.4 External Components

FX604

R1

100kΩ

X1

3.579545MHz

C1, C2

C3

C4

18pF

0.1µF

0.1µF

Resistors ±5%, capacitors ±10% unless otherwise stated.

Figure 2 Recommended External Components for Typical Application

1.5 General Description

1.5.1 Xtal Osc and Clock Dividers

Frequency and timing accuracy of the FX604 is determined by a 3.579545MHz clock present at the

XTAL/CLOCK pin. This may be generated by the on-chip oscillator inverter using the external components C1,

C2 and X1 of Figure 2, or may be supplied from an external source to the XTAL/CLOCK input. If supplied from

an external source, C1, C2 and X1 should not be fitted.

The on-chip oscillator is turned off in the 'Zero-Power' mode.

If the clock is provided by an external source which is not always running, then the 'Zero-Power' mode must be

set when the clock is not available. Failure to observe this rule may cause a significant rise in the supply

current drawn by FX604 as well as generating undefined states of the RXD, DET and RDYN outputs.

© 1996 Consumer Microcircuits Limited

5

D/604/3

Share Link: