RFHCS362GT-I/SO Microchip Technology, RFHCS362GT-I/SO Datasheet - Page 11

• 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: -

FIGURE 2-2:
RFEN Output
XTAL
CLKOUT
2002 Microchip Technology Inc.
FSK
output
S3 Input/
SHIFT input
LED output
OUT OUTPUT
NFET
V
V
PFET
NFET
DDRF
DDRF
V
S0, S1, S2,
DATA I/O
I/O CIRCUITS
Inputs
PFET
V
RS
NFET
DD
RFEN
DATA
RL
RFEN
IN
FSK
LEDL
input
PS/DATA
ANT1, ANT2 outputs
input
RFEN
IN
NFET
PFET
NFET
V
ASK
DD
LF
RDATA
RH
RS
LEDH
V
DDRF
V
5 pF
200
200
20 A
DATA
SHIFT
P
Change
VCO
LL
Pump
Lock
PS
Preliminary
2.1
2.1.1
The rfHCS362G/362F has an onboard nonvolatile
EEPROM which is used to store user programmable
data. The data can be programmed at the time of pro-
duction and includes the security-related information
such as encoder keys, serial numbers, discrimination
and seed values. All the security related options
are read protected. The rfHCS362G/362F has built-in
protection against counter corruption. Before every
EEPROM write, the internal circuitry also ensures that
the high voltage required to write to the EEPROM is at
an acceptable level.
2.1.2
The rfHCS362G/362F has an onboard RC oscillator
that controls all the logic output timing characteristics.
The oscillator frequency varies within ±10% of the
nominal value (once calibrated over a voltage range of
2V – 3.5V or 3.5V – 6.3V). All the timing values
specified in this document are subject to the oscillator
variation.
FIGURE 2-3:
1.10
1.08
1.06
1.04
1.02
1.00
0.98
0.96
0.94
0.92
0.90
-50-40 -30-20-10 0 10 20 30 40 50 6070 80 90
Note: Values are for calibrated oscillator
Encoder Architectural Overview
rfHCS362G/362F
ONBOARD EEPROM
INTERNAL RC OSCILLATOR
NORMALIZED OSCILLATOR
PERIOD VS. TEMPERATURE
TYPICAL rfHCS362G/362F
Temperature °C
V
DS41189A-page 11
DD
= 2.0V
= 3.0V
= 6.0V
Legend