sx1240 Semtech Corporation, sx1240 Datasheet - Page 7

• Manufacturer Part Number: sx1240
• Description: Sx1240 - Low Cost Integrated Transmitter Ic 434 Mhz And 868 Mhz Band Rf Transmitter
• Manufacturer: Semtech Corporation

*
**
***
**** Ramp-up time of the internal regulator turning the PA on. The typical 10% - 90% power ramp-up time is 10us
2.5. Timing Characteristics
The following table gives the operating specifications for the TWI interface of the SX1240.
Table 5
SX1240, Rev 1, Oct 2010
©2010 Semtech Corp.
ADVANCED COMMUNICATIONS & SENSING
Symbol
T_START
The oscillator startup time, TS_OSC, depends on the electrical characteristics of the crystal
With two different matching networks
Frequency deviation is positive (+FDA) with DATA = ‘1’, negative (-FDA) with DATA = ‘0’
Symbol
f
t
t
t
t
t
t
ctrl
ch
cl
rise
fall
setup
hold
Serial Interface Timing Specifications
Description
Time before CTRL pin mode
selection.
Description
CTRL Clock Frequency
CTRL Clock High time
CTRL Clock Low time
CTRL Clock rise time
CTRL Clock Fall time
DATA Setup time
DATA hold time
Conditions
Time from power on to sampling of
CTRL ***
Conditions
From Data transition to CTRL rising
edge
From CTRL rising edge to DATA
transition
Page 7
Min
-
Min
Integrated Transmitter IC
45
45
45
45
-
-
-
+ TS_OSC
200 us
Typ
Typ
-
-
-
-
-
-
-
Max
www.semtech.com
10
DATASHEET
5
5
-
-
-
-
SX1240
Max
-
MHz
ns
ns
ns
ns
ns
ns
Unit
ms
Unit