AC4490-200M-485 Laird Technologies, AC4490-200M-485 Datasheet - Page 20
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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
1 4
S E R I A L I N T E R F A C E
Note: Enabling parity cuts throughput and the interface buffer in half.
O E M H O S T D A T A R A T E
The OEM Host Data Rate is the rate with which the OEM Host and transceiver communicate over the serial interface.
This rate is independent of the RF baud rate, which is fixed at 76.8 kbps. Possible values range from 1200 bps to
115,200 bps. Note: Enabling Parity cuts throughput in half and the Interface Buffer size in half. The following
asynchronous serial data formats are supported:
S E R I A L I N T E R F A C E B A U D R A T E
This two-byte value determines the baud rate used for communicating over the serial interface to a transceiver. The
Table below lists values for some common baud rates. Baud rates below 1200 baud are not supported. For a baud
rate to be valid, the calculated baud rate must be within ±3% of the OEM Host baud rate. If the Test pin (Pin 12) is
pulled logic Low at reset, the baud rate will be forced to 9,600. The RF baud rate is fixed at 76.8 Kbps and is
independent of the interface baud rate. For Baud Rate values other than those shown below, the following equations
can be used:
Data Bits
8
7
7
9
8
8
7
E, O, M, S
E, O, M, S
E, O, M, S
Parity
T a b l e 6 : S u p p o r t e d S e r i a l F o r m a t s
N
N
N
N
Mark (M) corresponds to 1 & Space (S) corresponds to 0
F i g u r e 3 : E v e n P a r i t y B i t
Stop Bits
1
2
1
1
2
1
2
Transceiver Programming Requirements
Parity Disabled
Parity Disabled
Parity Disabled
Parity Enabled
Parity Enabled
Parity Enabled
Parity Enabled