CMX867D2 CML Microcircuits, CMX867D2 Datasheet - Page 4

• Manufacturer Part Number: CMX867D2
• Description: Low power V.22 modem
• Manufacturer: CML Microcircuits

Low Power V.22 Modem
1.3
2001 Consumer Microcircuits Limited
4, 8, 12, 17, 21
D2/E2/P4
7, 16, 24
CMX867
Pin No.
Signal List
10
11
13
14
15
18
19
20
22
23
1
2
3
5
6
9
REPLY DATA
XTAL/CLOCK
COMMAND
RDRVN
SERIAL
CLOCK
RXAFB
XTALN
Name
RXAN
TXAN
DATA
V
IRQN
RXA
CSN
TXA
V
V
RD
RT
BIAS
SS
DD
Signal
Power
Power
Type
O/P
O/P
O/P
O/P
O/P
O/P
O/P
T/S
I/P
I/P
I/P
I/P
I/P
I/P
I/P
BI
The output of the on-chip Xtal oscillator inverter.
The input to the oscillator inverter from the Xtal
circuit or external clock source.
Relay drive output, low resistance pull down to
V
to V
The negative supply rail (ground).
Schmitt trigger input to the Ring signal detector.
Connect to V
Open drain output and Schmitt trigger input
forming part of the Ring signal detector.
Connect to V
The positive supply rail. Levels and thresholds
within the device are proportional to this
voltage.
The output of the Rx Input Amplifier.
The inverting input to the Rx Input Amplifier
The non-inverting input to the Rx Input Amplifier
Internally generated bias voltage of
approximately V
is in ‘Powersave’ mode when V
discharge to V
by a capacitor mounted close to the device pins.
The inverted output of the Tx Output Buffer.
The non-inverted output of the Tx Output Buffer.
The C-BUS chip select input from the C.
The C-BUS serial data input from the C.
The C-BUS serial clock input from the C.
A 3-state C-BUS serial data output to the C.
This output is high impedance when not sending
data to the C.
A ‘wire-ORable’ output for connection to a C
Interrupt Request input. This output is pulled
down to V
when inactive. An external pullup resistor is
required ie R1 of Figure 2.
SS
4
DD
when active and medium resistance pull up
when inactive.
SS
when active and is high impedance
SS
DD
SS
if Ring Detector not used.
if Ring Detector not used.
DD
. Should be decoupled to V
Description
/2, except when the device
BIAS
will
SS
CMX867
D/867/2