ATA3745P3-TGQY Atmel, ATA3745P3-TGQY Datasheet - Page 11

• Manufacturer Part Number: ATA3745P3-TGQY
• Description: IC UHF ASK/FSK RECEIVER 20SOIC
• Manufacturer: Atmel

Specifications of ATA3745P3-TGQY

• Frequency: 310MHz ~ 440MHz
• Sensitivity: -108dBm
• Data Rate - Maximum: 10 kBaud
• Modulation Or Protocol: ASK, FSK
• Applications: RKE, TPM, Security Systems
• Current - Receiving: 7mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-SOIC (0.300", 7.50mm Width)
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Memory Size: -
• Lead Free Status / Rohs Status: Compliant
• Other names: ATA3745P3-TGQYTR

5.2.1
4901B–RKE–11/07
Sleep Mode
The length of period T
extension factor X
calculated to be:
In US and European applications, the maximum value of T
to 1. The time resolution is about 2 ms in that case. The sleep time can be extended to almost
half a second by setting X
resulting in a different mode of action as described below:
X
X
as every bit check is OK. If the bit check fails once, this bit is set back to 0 automatically,
resulting in a regular sleep time. This functionality can be used to save current in presence of
a modulated disturber similar to an expected transmitter signal. The connected microcontroller
is rarely activated in that condition. If the disturber disappears, the receiver switches back to
regular polling and is again sensitive to appropriate transmitter signals.
Table 5-6 on page 19
manent sleep condition. The receiver remains in that condition until another value for Sleep is
programmed into the OPMODE register. This function is desirable where several devices
share a single data line.
T
Sleep
SleepStd
SleepTemp
=
= 1 implies the standard extension factor. The sleep time is always extended.
Sleep
= 1 implies the temporary extension factor. The extended sleep time is used as long
X
Sleep
Sleep
shows how the highest register value of Sleep sets the receiver to a per-
Sleep
described
1024
Sleep
is defined by the 5-bit word Sleep of the OPMODE register, the
T
to 8. X
Clk
inTable 5-8 on page
Sleep
can be set to 8 by bit X
20, and the basic clock cycle T
Sleep
is about 60 ms if X
SleepStd
or by bit X
ATA3745
Sleep
SleepTemp
Clk
is set
. It is
11
,