MICRF405YML TR Micrel Inc, MICRF405YML TR Datasheet - Page 14

• Manufacturer Part Number: MICRF405YML TR
• Description: 868-915 MHz ISM Band Transmitter
• Manufacturer: Micrel Inc

Specifications of MICRF405YML TR

• Frequency: 290MHz ~ 980MHz
• Applications: ISM
• Modulation Or Protocol: ASK, FSK
• Data Rate - Maximum: 200 kbps
• Power - Output: 10dBm
• Current - Transmitting: 18mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2.2 V ~ 3.6 V
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 24-MLF®, QFN
• Operating Temperature (min): -40C
• Operating Temperature (max): 125C
• Operating Temperature Classification: Automotive
• Product Depth (mm): 4mm
• Product Length (mm): 4mm
• Operating Supply Voltage (typ): 2.5/3.3V
• Operating Supply Voltage (max): 3.6V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Memory Size: -
• Lead Free Status / Rohs Status: Compliant
• Other names: 576-1965-2; MICRF405YMLTR; MICRF405YMLTR

April 2006
Preamble
1-4 bytes
SyncID_Len
Packet Engine Overview:
Micrel
• Preamble generated by packet engine: 1-4 bytes equal 10101010. Length set by Pream_Len[1:0]
• SyncID field added by packet engine: 1-4 bytes of user defined content. Length set by SyncID_Len[1:0].
• The frame length is entered by user for each packet. Specify the length of the payload and CRC fields in
• For each payload byte, wait for falling edge of RDY before writing the byte into the DATA register.
• The optional CRC field ends the packet. Its length is programmable 0, 1 or 2 bytes by the Sel_CRC[1:0].
Content set in registers SyncID0, SyncID1, SyncID2 and SyncID3, address 28-25.
bytes, ranging from 2 to (255 ÷ # CRC bytes). # CRC bytes can be 0 to 2.
0
0
1
1
SynchID_Len
0
1
0
1
SyncID
1-4 bytes
Table 8. Virtual Wire Packet Structure, SyncID field.
Start of transmitted packet. Leftmost byte transmitted first
Preamble
Preamble
Preamble
Preamble
Table 7. Virtual Wire Packet Structure Overview.
Frame length
1 byte
SyncIDO
SyncIDO
SyncIDO
SyncIDO
14
Frame length
SyncID1
SyncID1
SyncID1
Payload
2/2/1-253/254/255 bytes
Frame length
SyncID2
SyncID2
Frame length
SyncID3
CRC
2/1/0 bytes
MICRF405
[phone]
M9999-041906
Frame length