Specifications

Si2457/Si2434/Si2415
Rev. 0.91 7
Table 5. Absolute Maximum Ratings
Parameter Symbol Value Unit
DC Supply Voltage V
D
4.1 V
Input Current, Si2457/34/15 Digital Input
Pins
I
IN
±10 mA
Digital Input Voltage V
IND
–0.3 to 5.3 V
CLKIN/XTALI Input Voltage V
XIND
–0.3 to (V
D
+ 0.3) V
Operating Temperature Range T
A
–10 to 100 °C
Storage Temperature Range T
STG
–40 to 150 °C
Note: Permanent device damage may occur if the above absolute maximum ratings are exceeded. Functional operation
should be restricted to the conditions as specified in the operational sections of this data sheet. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
Table 6. Switching Characteristics
(V
D
= 3.0 to 3.6 V, T
A
= 0 to 70 °C for K-Grade)
Parameter Symbol Min Typ Max Unit
CLKOUT Output Clock Frequency
2.048
—
49.152
MHz
Baud Rate Accuracy t
BD
–1 — 1 %
Start Bit ↓ to RTS
↓ t
RTH
—1/(2x Baud
Rate)
—ns
CTS
or RTS ↑ High to Start Bit↓ t
RTS
10 — — ns
Stop Bit ↑ to CTS
↑ t
CTH
———ns
RESET
↓ to RESET ↑ t
RS
5.0 — — ms
RESET
↑ to 1st AT Command t
AT
300 — — ms
Address Setup t
AS
15 — — ns
Address Hold t
AH
0——ns
WR
Low Pulse Width t
WL
50 — — ns
Write Data Setup Time t
WDSU
20 — — ns
Write Cycle Time t
WC
120 — — ns
Chip Select Setup t
CSS
10 — — ns
Chip Select Hold t
CSH
0——ns
RD
Low Pulse Width t
RL
50 — — ns
RD
Low to Data Driven Time t
RLDD
— — 20 ns
Data Hold t
DH
10 — — ns
RD
High to Hi-Z Time t
DZ
— — 30 ns
Read Cycle Time t
RC
120 — — ns
Note: All timing is referenced to the 50% level of the waveform. Input test levels are V
IH
=V
D
– 0.4 V, V
IL
=0.4V