
DE6003
2
EXTERNAL INTERFACE
The DE6003 transceiver has a simple external interface, with
all but three interface connections having CMOS compatible
switching levels: some inputs have pull-down or pull-up resistors.
The DE6003 connection list, Table 2, is followed by a description
of each of the external connections in pin number order.
On power up, the DE6003 transceiver should have its control
inputs set to receive with the power amplifier off. On power
switch-on, a channel within the 101 channels is selected by the
value that is on the select data inputs SD(6:0); the correct channel
should be loaded by placing the channel number on the select
data inputs and strobing the channel data in with LOADB.
The antenna select input (ANTSEL) is used to switch
between the two antenna ports; this input should be set to
antenna 1 for transmit and only switched when the transceiver
is in receive mode for antenna diversity selection.
The data input (TXD) has data applied in simple non-return
to zero (NRZ) format with the maximum consecutive ‘1’s or ‘0’s
limited to 16. Receive data (RXD) is demodulated and output in
NRZ format with no clock extracted. The RXD output is
designed to drive a high impedance CMOS input with a
maximum load capacitance of 6pF. Loads in excess of 6pF will
extend the negative edge time of the output data resulting in
pulse stretching.
All Inputs
Input voltage low
Input voltage high
PAOFF, PWRLO, ANTSEL
Input current low
Input current high
RX/TX
Input current low
Input current high
LOADB
Input current low
Input current high
STDBY
Input current low
Input current high
SD (6:0), TXD
Input current low
Input current high
SYNLOK
Output voltage low
Output voltage high
RXD
Output voltage low
Output voltage high
Rise/fall time
CLK
Output current low
Output current high
RSSI
Output voltage low
Output voltage high
ANT1, ANT2
Isolation between ports
Negative Supply, V
EE
Output current
Output voltage
Ripple and noise
Characteristic
Value
Min.
Conditions/comments
Symbol
V
IL
V
IH
I
IL
I
IH
I
IL
I
IH
I
IL
I
IH
I
IL
I
IH
I
IL
I
IH
V
OL
V
OH
V
OL
V
OH
I
OL
I
OH
V
OL
V
OH
I
EE
V
EE
ELECTRICAL CHARACTERISTICS
The Electrical Characteristics are guaranteed over the following range of operating conditions, unless otherwise stated:
T
AMB
= 0°C to
1
55°C, V
CC
= 5V
±
5%, V
CC
2
5
=
1
3V to
1
6V.
Max.
Units
V
V
μ
A
μ
A
μ
A
μ
A
μ
A
μ
A
μ
A
μ
A
μ
A
μ
A
V
V
V
V
ns
mA
mA
V
V
dB
mA
V
mVp-p
1·5
V
CC
2
10
10
2
600
150
2
400
10
2
10
200
2
10
200
0·5
V
CC
1·2
V
150
2
1·6
1·6
3·3
30
2
15
2
5·25
50
0
3·5
2
400
50
2
250
0
V
CC
2
0·5
0
3·8
75
2
0·25
0·25
0
10
0
2
4·75
V
IN
= 0V
V
IN
= V
CC
=5·25V
V
IN
= 0V
V
IN
= V
CC
=5·25V
V
IN
= 0V
V
IN
= V
CC
=5·25V
V
IN
= 0V
V
IN
= V
CC
=5·25V
Note: Not CMOS compatible switching levels.
at 1mA sink
at 1mA source
V
CC
=
1
5V at 100
μ
A
V
=
1
5V at 100
μ
A
Load = 6pF
Note: Not CMOS compatible switching levels.
For load impedance
<
300
See AN142 for interface circuit
Note: Analog output, source impedance 10k
– not
CMOS compatible. See Fig 9.
Nominal 50
load on each port
Test at V
CC
2
5
=
+
5V
at
2
15mA
Table 1