MICRF112YMM Micrel Inc, MICRF112YMM Datasheet - Page 12
![IC XMITTER UHF ASK/FSK 10-MSOP](/photos/6/84/68455/576-10-msop_sml.jpg)
MICRF112YMM
Manufacturer Part Number
MICRF112YMM
Description
IC XMITTER UHF ASK/FSK 10-MSOP
Manufacturer
Micrel Inc
Datasheet
1.MICRF112-433_EV.pdf
(20 pages)
Specifications of MICRF112YMM
Frequency
300MHz ~ 450MHz
Applications
RKE
Modulation Or Protocol
ASK, OOK
Data Rate - Maximum
50 kbps
Power - Output
10dBm
Current - Transmitting
12.3mA
Data Interface
PCB, Surface Mount
Antenna Connector
PCB, Surface Mount
Voltage - Supply
1.8 V ~ 3.6 V
Operating Temperature
-40°C ~ 125°C
Package / Case
10-MSOP, Micro10™, 10-uMAX, 10-uSOP
Transmitting Current
12.5mA
Data Rate
50Kbps
Frequency Range
300MHz To 450MHz
Modulation Type
ASK, FSK
Rf Ic Case Style
MSOP
No. Of Pins
10
Supply Voltage Range
1.8V To 3.6V
Operating
RoHS Compliant
Output Power
10dBm
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Memory Size
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
576-1963-5
MICRF112YMM
MICRF112YMM
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MICRF112YMM
Manufacturer:
MICREL
Quantity:
700
Part Number:
MICRF112YMM
Manufacturer:
MICREL/麦瑞
Quantity:
20 000
Company:
Part Number:
MICRF112YMM-TR
Manufacturer:
TI
Quantity:
87
Functional Description
Figure 3 shows a functional block diagram of the
MICRF112 transmitter. The MICRF112 can be best
described as a phase locked transmitter. The system
can be partitioned into six functional blocks; crystal
oscillator, PLL×32, power amplifier, enable control,
under voltage detect and open drain switch for FSK
operation.
Crystal Oscillator
The
configuration. It is designed to accept crystals with
frequency from 9.375MHz to 14.0625MHz.
Crystal Oscillator Parameters for ASK Operation
Figure
configuration for ASK operation. The reference oscillator
is capable of driving crystals with ESR range from 20Ω
to 300Ω.
When the ESR of crystal is at 20Ω, the crystal parameter
limits are:
Functional Diagram
Micrel, Inc.
March 2008
ESR 20Ω
C
C
PAR
MO
reference
10 to 40fF
4
2 to 10pF
shows
oscillator
a
Figure 3. Functional Block Diagram MICRF112 10 Pin ASK / FSK Version
reference
is
crystal-based
oscillator
Pierce
circuit
12
When the ESR of crystal is at 300Ω, the crystal
parameter limits are:
ESR
C
C
C
PAR
MO
LOAD
Figure 4. Reference Oscillator ASK Operation
300Ω
2 to 5pF
10 to 40fF
10 to 30pF
(408) 944-0800
M9999-031008
MICRF112