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SX1512BIULTRT Datasheet(PDF) 9 Page - Semtech Corporation

Part No. SX1512BIULTRT
Description  World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine
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Maker  SEMTECH [Semtech Corporation]
Homepage  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SX1512BIULTRT Datasheet(HTML) 9 Page - Semtech Corporation

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ADVANCED COMMUNICATIONS & SENSING
Rev 4 – 26
th April 2011
9
www.semtech.com
SX1511B/SX1512B
World’s Lowest Voltage Level Shifting GPIO
with LED Driver and Keypad Engine
Symbol
Description
Conditions
Min
Typ
Max
Unit
tSO,VALID
SO valid time (% of SCK cycle)
After SCK falling edge
-
-
33
(4)
%
tNSS,SCK
NSS low to SCK rising edge
-
25
-
-
ns
tSCK,NSS
SCK falling edge to NSS high
-
25
-
-
ns
tNSS,HIGH
NSS rising to falling edge
-
25
-
-
ns
Miscellaneous
RPULL
Programmable pull-up/down
resistors for IO[0-7]
-
-
42
-
k
Internal
1.3
2
2.6
fOSC
Oscillator frequency
External from OSCIN
(40-60% duty cycle)
-
-
2.6
MHz
(1) Assuming no load connected to outputs and inputs fixed to VCC1,2 or GND.
(2) Can be increased by tying together and driving simultaneously several I/Os.
(3) With RegHighInput bit enabled (VCCx min =1.65V), else 3.6V (VCCx min = 1.2V)
(4) fSCK is calculated assuming a tSO,VALID of maximum 1/3 of SCK cycle. This gives 1/6 of SCK cycle as setup time to the host controller.
For systems where the setup time can be relaxed, tSO,VALID is also shown in §3 to allow the user to calculate the maximum SPI frequency
for individual systems.
Table 5 – Electrical Specifications


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