MICRF104BM Micrel Inc, MICRF104BM Datasheet - Page 2

• Manufacturer Part Number: MICRF104BM
• Description: IC ASK TRANSMITTER UHF 14SOIC
• Manufacturer: Micrel Inc

Specifications of MICRF104BM

• Frequency: 300MHz ~ 470MHz
• Applications: RKE
• Modulation Or Protocol: ASK, OOK
• Data Rate - Maximum: 20 kbps
• Power - Output: -2dBm
• Current - Transmitting: 12mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 1.8 V ~ 4 V
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 14-SOIC (0.154", 3.90mm Width)
• Peak Reflow Compatible (260 C): No
• Supply Voltage Max: 4V
• Transceiver Type: RF Transmitter
• Data Rate Max: 20Kbps
• Leaded Process Compatible: No
• Mounting Type: Surface Mount
• No. Of Drivers: 1
• Supply Current: 35mA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -
• Memory Size: -
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant, Contains lead / RoHS non-compliant

MICRF104
Pin Configuration
Pin Description
MICRF104
Pin Number
2, 4, 13
10
11
12
14
1
3
5
6
7
8
9
Pin Name
VDDPWR
REFOSC
RFSTBY
VDDRF
ANTM
ANTP
VSS
ASK
SW
PC
EN
5V
VDDPWR
REFOSC
RFSTBY
ANTM
VSS
VSS
5V
Pin Function
Positive power supply input for the DC/DC converter.
Ground return
5V Output from the DC / DC converter
This is the timing reference frequency which is the transmit frequency
divided by 32. Connect a crystal (mode dependent) between this pin and
VSS, or drive the input with an AC coupled 0.5Vpp input clock. See Refer-
ence Oscillator Section in this data sheet
Input for transmitter standby control pin is pulled to VDDRF for transmit
operation and VSS for stand-by mode.
Negative RF power output to drive the low side of the transmit loop antenna
Positive RF power output to drive the high side of the transmit loop antenna
Amplitude Shift Key modulation data input pin.
Positive power supply input for the RF circuit. A power supply bypass
capacitor connected from VDDRF to VSS should have the shortest possible
path.
Power Control Input. The voltage at this pin should be set between 0.3V to
0.4V for normal operation.
DC/DC converter Switch. NPN output switch transistor collector.
Chip Enable input. Active high
1
2
3
4
5
6
7
MICRF104BM
2
14 EN
13
12
11
10
9
8
VSS
SW
PC
VDDRF
ASK
ANTP
November 8, 2001
Micrel