RFHCS362GT-I/SO Microchip Technology, RFHCS362GT-I/SO Datasheet - Page 30

• Manufacturer Part Number: RFHCS362GT-I/SO
• Description: IC CODE HOPPNG ENCDR W/RF 18SOIC
• Manufacturer: Microchip Technology

Specifications of RFHCS362GT-I/SO

• Frequency: 310MHz ~ 440MHz
• Applications: Automotive, Building Access, Garage Openers
• Modulation Or Protocol: ASK, FSK
• Data Rate - Maximum: 3.3 kbps
• Power - Output: -12dBm ~ 2dBm
• Current - Transmitting: 11.5mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2.2 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 18-SOIC (0.300", 7.50mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Memory Size: -

rfHCS362G/362F
6.3.1
The rfHCS362G/362F crystal oscillator can be config-
ured for ASK operation. Figure 6-1 shows an example
ASK circuit.
Capacitor C1 trims the crystal load capacitance to the
desired circuit load capacitance and places the crystal
on the desired frequency.
TABLE 6-2:
DS41189A-page 30
Note 1: Standard Operating Conditions (unless otherwise stated) T
1000 pF
100 pF
150 pF
470 pF
22 pF
39 pF
CRYSTAL OSCILLATOR ASK
OPERATION
C1
f
XTAL
XTAL OSC APPROXIMATE FREQ. VS. CAPACITANCE (ASK MODE)
= 13.55 MHz
Predicted Frequency
13.551438
13.550563
13.549844
13.549672
13.549548
13.549344
(MHz)
Preliminary
PPM from 13.55 MHz
FIGURE 6-1:
+106
+42
-12
-24
-33
-48
A
= 25°C, RF
X1
C1
CRYSTAL CIRCUIT
EXAMPLE ASK EXTERNAL
EN
Transmit Frequency (MHz)
= 1, V
2002 Microchip Technology Inc.
XTAL
(32 * f
DDRF
rfHCS362G/
433.5895
433.5856
433.646
433.618
433.595
433.579
362F
(1)
= 3V,
XTAL
)