AC4790-200A-485 Laird Technologies, AC4790-200A-485 Datasheet - Page 15

• Manufacturer Part Number: AC4790-200A-485
• Description: TXRX 900MHZ 3.3-5.5V FHSS 200MW
• Manufacturer: Laird Technologies
• Series: AeroCommr

Specifications of AC4790-200A-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: On-Board, Chip
• Operating Temperature: -40°C ~ 85°C
• Package / Case: Module
• Wireless Frequency: 900 MHz
• Interface Type: 20-pin mini connector
• Board Size: 49 mm x 42 mm x 5 mm
• 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

A P I C O N T R O L
API Control is a powerful feature that the Masterless Protocol offers. When enabled, the API Transmit Packet, API
Send Data Complete and API Receive Packet features provide dynamic packet routing and packet accounting ability
to the OEM Host, thereby eliminating the need for extensive programming on the OEM Host side. This ability of the
protocol makes it ideal for any legacy system. API operation utilizes specific packet formats; specifying various vital
parameters used to control radio settings and packet routing on a packet-by-packet basis. The API features can be
used in any combination that suits the OEM’s specific needs.
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.lairdtech.com\wireless
Acknowledge
Send RF
Yes
Discard Packet
C o m m a n d /D a ta
M o d e
B ro a d c a s t P a ck e t
T ra n s m it P a ck e t
A tte m p ts = 0
D e cre m e n t
B ro a d c a st
B ro a d c a st
A tte m p ts
R e ce ive M o d e
D a ta in B u ffe r
T H E O R Y O F O P E R A T I O N
P in 1 7 L o w
R F D a ta
A T + + +
A d d re ss e d P a c k e t
T ra n sm it A tte m p ts
T ra n s m it P a ck e t
R e c e iv e A C K
A tte m p ts = 0
D e c re m e n t
T ra n s m it
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