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Si4464/63/61/60
Table 9. Operating State Response Time and Current Consumption*
State/Mode
TX
Response Time to
RX
Current in State
/Mode
Shutdown State
Standby State
Sleep State
SPI Active State
Ready State
TX Tune State
RX Tune State
TX State
RX State
15 ms
440 μs
440 μs
340 μs
126 μs
58 μs
—
—
130 μs
15 ms
440 μs
440 μs
340 μs
122 μs
—
74 μs
138 μs
75 μs
30 nA
50 nA
900 nA
1.35 mA
1.8 mA
8 mA
7.2 mA
18 mA @ +10 dBm
10 or 13 mA
*Note: TX ? RX and RX ? TX state transition timing can be reduced to 70 μs if using Zero-IF mode.
Figure 7 shows the POR timing and voltage requirements. The power consumption (battery life) depends on the
duty cycle of the application or how often the part is in either Rx or Tx state. In most applications the utilization of
the standby state will be most advantageous for battery life but for very low duty cycle applications shutdown will
have an advantage. For the fastest timing the next state can be selected in the START_RX or START_TX API
commands to minimize SPI transactions and internal MCU processing.
3.3.1. Power on Reset (POR)
A Power On Reset (POR) sequence is used to boot the device up from a fully off or shutdown state. To execute this
process, VDD must ramp within 1ms and must remain applied to the device for at least 10ms. If VDD is removed,
then it must stay below 0.15V for at least 10ms before being applied again. Please see Figure x and Table x for
details.
V DD
V R RH
V R RL
Time
20
t SR
t PORH
Figure 7. POR Timing Diagram
Rev 1.2
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