CMX469AE2 CML Microcircuits, CMX469AE2 Datasheet - Page 4

• Manufacturer Part Number: CMX469AE2
• Description: 1200/2400/4800 Baud FFSK Modem
• Manufacturer: CML Microcircuits

1200/2400/4800 Baud FFSK/MSK Modem
1.3
2001 Consumer Microcircuits Limited
Pin
No.
D3
10
11
12
1
2
3
4
5
6
7
8
9
Signal List
CMX469A
No.
Pin
E2
10
11
12
13
14
1
2
3
5
7
8
9
Pin
No.
P6
10
11
12
13
1
2
3
5
6
7
8
9
CLOCK/XTAL
UNCLOCKED
Tx SYNC O/P
Tx ENABLEN
Tx DATA I/P
BANDPASS
Rx ENABLE
Tx SIGNAL
CLOCKED
DATA O/P
DATA O/P
XTALN
Name
V
O/P
O/P
V
BIAS
SS
Signal
Type
PWR
O/P
O/P
O/P
O/P
O/P
O/P
I/P
I/P
I/P
I/P
BI
5
The input to the on-chip inverter, for use with
either a 1.008MHz or a 4.032MHz Xtal or an
external clock. Clock frequency selection is by
means of the CLOCK RATE pin. This affects the
operational data rate of the device. Operation of
any CML microcircuit without a Xtal or clock
input may cause device damage.
The output of the on-chip inverter.
A squarewave, produced on-chip, to
synchronize the input of logic data and
transmission of the FFSK/MSK signal.
When the transmitter is enabled, this pin outputs
the FFSK/MSK signal. With the transmitter
disabled, this pin is set to a high-impedance
state.
The serial logic data to be transmitted is input to
this pin.
A logic ‘0’ will enable the transmitter. A logic ‘1’ at
this input will put the transmitter into powersave
whilst forcing Tx SYNC OUTPUT to a logic ‘1’
and Tx SIGNAL OUTPUT to a high-impedance
state. This pin is internally pulled to V
The output of the Rx Bandpass Filter. This output
impedance is typically 10k
buffering prior to use.
The control of the Rx function
The output of the on-chip analogue bias circuitry.
Held internally at V
decoupled to V
voltage is maintained under all powersave
conditions.
Negative supply rail (GND).
The recovered asynchronous serial data output
from the receiver.
The recovered synchronous serial data output
from the receiver. Data is latched out by the
recovered clock, available at the Rx SYNC O/P.
SS
Description
by a capacitor (C2). This bias
DD
/2, this pin should be
and may require
DD
.
CMX469A
D/469A/2