fx604 Consumer Microcircuits Limited, fx604 Datasheet - Page 4

• Manufacturer Part Number: fx604
• Description: V23 Compatible Modem
• Manufacturer: Consumer Microcircuits Limited

V.23 Compatible Modem
This device is capable of detecting and decoding small amplitude signals. To achieve this V
decoupling and protecting the receive path from extraneous in-band signals are very important.
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.
1996 Consumer Microcircuits Limited
Pin No.
FX604
D4/P3
10
11
12
13
14
15
16
9
Notes: I/P
RXEQ
RDYN
Name
O/P =
V
RXD
TXD
CLK
DET
V
BIAS
DD
Signal
=
Input
Output
Power
Type
O/P
O/P
O/P
O/P
I/P
I/P
I/P
Internally generated bias voltage, held at V DD /2
when the device is not in 'Zero-Power' mode.
Should be decoupled to V SS by a capacitor
mounted close to the device pins.
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.
A logic level input which may be used to clock
data bits in/out of the FSK Data Retiming block.
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.
A logic level output of the on-chip energy detect
circuit.
"Ready for data transfer" output of the on-chip
data retiming circuit. This open-drain active low
output
Request/Wake-up input to the associated
An external pull-up resistor should be connected
between this output and V DD .
The positive supply rail. Levels and thresholds
within the device are proportional to this voltage.
Should be decoupled to V SS by a capacitor
mounted close to the device pins.
may
4
be
Description
used
as
an
Interrupt
C.
DD
D/604/3
and V
FX604
It is
BIAS