AC4490-1000M-485 Laird Technologies, AC4490-1000M-485 Datasheet - Page 15
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AC4490-1000M-485
Manufacturer Part Number
AC4490-1000M-485
Description
TXRX 900MHZ 3.3V TTL 1W
Manufacturer
Laird Technologies
Series
AeroCommr
Specifications of AC4490-1000M-485
Frequency
902MHz ~ 928MHz
Data Rate - Maximum
115.2kbps
Modulation Or Protocol
FHSS, FSK
Applications
AMR, Fire & Security Alarms, Telemetry
Power - Output
5mW ~ 1W
Sensitivity
-110dBm
Voltage - Supply
3.3V, 5V
Current - Transmitting
650mA
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
1000 mW
Antenna
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
R e c e i v e M o d e
When a transceiver is not in Transmit or Command mode, it will be in Receive Mode listening for data. While in
Receive Mode, subsequent data of up to 80 bytes can be received every hop (20 ms).
C o m m a n d M o d e
A radio will enter Command Mode when data is received over the serial interface from the OEM Host and either the
Command/Data pin (pin 17) is logic Low or the received data contains the “AT+++” (Enter AT Command Mode)
command. Once in Command Mode, all data received by the radio is interpreted as command data. Command Data
can be either EEPROM Configuration or On-The-Fly commands.
Discard Packet
Yes
Send Packet over
Receive full
check CRC
packet and
Duplicate
Packet
RF
F i g u r e 1 : P e n d i n g R F a n d D a t a i n B u f f e r F l o w
Yes
Yes
Receive Mode
Pending RF
Broadcast
Received
Packet
Send Packet over
RF
Addressed Packet
Validate CRC
Destination
Matching
Duplicate
Packet
MAC
Yes
Yes
www.aerocomm.com
Acknowledge
Send RF
Yes
Discard Packet
Com mand/Data
Mode
Broadcast Packet
Transm it Packet
Attem pts = 0
Decrement
Broadcast
Broadcast
Attem pts
Receive M ode
Data in Buffer
T H E O R Y O F O P E R A T I O N
Pin 17 Low
RF Data
AT+++
Addressed Packet
Transm it Attem pts
Transm it Packet
Receive ACK
Attem pts = 0
Decrem ent
Transm it
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