AC4490-200M-485 Laird Technologies, AC4490-200M-485 Datasheet - Page 11
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AC4490-200M-485
Manufacturer Part Number
AC4490-200M-485
Description
TXRX 900MHZ 3.3-5.5V TTL 200MW
Manufacturer
Laird Technologies
Series
AeroCommr
Specifications of AC4490-200M-485
Frequency
902MHz ~ 928MHz
Data Rate - Maximum
115.2kbps
Modulation Or Protocol
FHSS, FSK
Applications
AMR, Fire & Security Alarms, Telemetry
Power - Output
5mW ~ 200mW
Sensitivity
-110dBm
Voltage - Supply
3.3V, 5V
Current - Transmitting
68mA
Data Interface
Connector, 2 x 10 Header
Antenna Connector
MMCX
Operating Temperature
-40°C ~ 85°C
Package / Case
Module
Wireless Frequency
900 MHz
Interface Type
20-pin mini connector
Modulation
FHSS, FSK
Security
1 byte System ID, DES
Operating Voltage
3.3 V to 5.5 V
Output Power
200 mW
Antenna
Integral and External Dipole
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Memory Size
-
Current - Receiving
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
AC4490 User’s Manual
P I N D E F I N I T I O N S
The AC4490 has a simple interface that allows OEM Host communications with the transceiver. Table 2 below shows
the connector pin numbers and associated functions.
Module
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin
4
6
7
5
3
9
10
19
2
11
23
12
21
16
13
1x1
2
Pin
2
2
O
O
I/O
I
I/O
GND
O
O
I
O
PWR
PWR
I
O
I
I
GND
Type
GO0
TXD
RS485 A
(True)
RXD
RS485 B
(Invert)
GI0
GND
Hop Frame
CTS
RTS
GO1
VCC
VPA
Test
RSSI
GI1
UP_RESET
GND
Signal
Name
1
T a b l e 2 : A C 4 4 9 0 P i n D e f i n i t i o n s
1
Generic Output pin
Serial data output from the module to the OEM Host.
Non-inverted RS-485 representation of serial data
Serial data input to the module from the OEM Host.
Mirror image of RS-485 A
Generic Input pin
Signal Ground
Pulses low when the transceiver is hopping frequencies.
Clear to Send – Active Low when the transceiver is ready to accept data for transmission. CTS
should be monitored by the OEM Host & data flow to the radio should cease when CTS is High.
Request to Send – When enabled in EEPROM, the OEM Host can take this High when it is not
ready to accept data from the transceiver.
NOTE: Keeping RTS High for too long can cause data loss.
Generic Output pin
Powers the radio and microcontroller. Must be connected.
1x1:
200:
1000:
Powers the power-amplifier and draws most current when in TX mode. Must be connected.
1x1:
200:
1000:
Test Mode – When pulled logic Low and then applying power or resetting, the transceiver’s
serial interface is forced to a 9600, 8-N-1 rate. To exit, the transceiver must be reset or power-
cycled with Test Mode logic High.
Received Signal Strength - An analog output giving an instantaneous indication of received sig-
nal strength. Only valid while in Receive Mode.
Generic Input pin
RESET – Controlled by the AC4490 for power-on reset if left unconnected. After a stable power-
on reset, a logic High pulse will reset the transceiver.
Signal Ground
www.aerocomm.com
3.3V, ±50mV ripple
3.3 – 5.5V, ±50mV ripple (Pin 10 is internally connected to Pin 11)
3.3 – 5.5V, ±50mV ripple
3.3V, ±50mV ripple
3.3 – 5.5V, ±50mV ripple (Pin 11 is internally connected to Pin 10)
3.3V ±3%, ±100mV ripple
Function
S P E C I F I C A T I O N S
5