MX589 Consumer Microcircuits Limited, MX589 Datasheet - Page 4

• Manufacturer Part Number: MX589
• Description: Mx589 High Speed Gmsk Modem
• Manufacturer: Consumer Microcircuits Limited

High Speed GMSK Modem 4k to 64kbps
2
©2001 MX-COM, Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
TN/DW/P
Pin No.
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
9
Signal List
XTAL/CLOCK
Rx Signal In
Rx PSAVE
Rx
Tx PSAVE
Tx Enable
RxDCacq
ClkDivA
ClkDivB
Rx Data
PLLacq
Tx Data
Rx CLK
Signal
Tx CLK
Rx S/N
Tx Out
XTAL
Rx FB
DOC1
DOC2
V
HOLD
V
V
BT
BIAS
DD
SS
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output
output
output
output
output
output
power
power
Type
input
input
input
input
input
input
input
input
input
input
input
The output of the on-chip clock oscillator.
The input to the on-chip Xtal oscillator. A Xtal, or externally derived clock
(f
is to be used, it should be connected to this pin and the
unconnected.
Note: Operation of the MX589 without a suitable Xtal or clock input may
cause device damage.
Logic level inputs control the internal clock divider and therefore, the transmit
and receive data rate. See Table 4.
Logic level inputs control the internal clock divider and therefore, the transmit
and receive data rate. See Table 4.
A logic 0 applied to this input will freeze the Clock Extraction and Level
Measurement circuits unless they are in ‘Acquire’ mode.
A logic 1 applied to this input will set the RX Level Measurement circuitry to
the Acquire mode.
A logic 1 applied to this input will set the RX Clock Extraction circuitry to the
‘Acquire’ mode. See Table 5.
A logic 1 applied to this input will powersave all receive circuits except for
RXCLK output (which will continue at the set bit-rate) and cause the RX Data
and RX S/N outputs to go to a logic 0.
The internal circuitry bias line, held at V
V
Output of the RX Input Amplifier.
Input to RX input amplifier.
Negative supply (GND).
Connections to the RX Level Measurement Circuitry. A capacitor should be
connected from each pin to V
Connections to the RX Level Measurement Circuitry. A capacitor should be
connected from each pin to V
A logic level to select the modem BT (the ratio of the TX Filter's -3dB
frequency to the Bit-Rate). A logic 1 = BT of 0.5 and a logic 0 = BT of 0.3.
The TX signal output from the MX589 GMSK Modem.
A logic 1 applied to this input, enables the transmit data path, through the TX
Filter to the TX Out pin. A logic 0 will place the TX Out pin to VBIAS via a
high impedance.
A logic 1 applied to this input will powersave all transmit circuits except for
the TX Clock.
The logic level input for the data to be transmitted. This data should be
synchronous with TX CLK.
A logic level output carrying the received data, synchronous with RX CLK.
A logic level clock output at the received data bit-rate.
A logic level clock output at the transmit-data rate.
A logic level output which may be used as an indication of the quality of the
received signal.
Positive supply. A single 5.0V power supply is required. Levels and voltages
within this modem are dependent upon this supply. This pin should be
bypassed to V
XTAL
SS
by a capacitor mounted close to the pin.
Table 1: Signal List
) pulse input should be connected here. If an externally generated clock
Page 4 of 20
SS
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by a capacitor mounted close to the pin.
SS
SS
.
.
Description
DD
/2. This pin must be bypassed to
XTAL
Doc. # 204800103.011
pin left
MX589