SX1511BIULTRT Semtech, SX1511BIULTRT Datasheet - Page 10

• Manufacturer Part Number: SX1511BIULTRT
• Description: 8-chan GPIO With Independent I/O Voltages (SPI)
• Manufacturer: Semtech

ADVANCED COMMUNICATIONS & SENSING
(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) SX1511/12B with RegHighInput bit enabled (VCCx min =1.65V), else 3.6V (VCCx min = 1.2V)
(4) f
For systems where the setup time can be relaxed, t
for individual systems.
Rev 3 – 9
Symbol
VOL
IOH
IOL
f
t
t
t
t
t
t
t
t
Miscellaneous
RPULL
f
SCK
SCK,LOW
SCK,HIGH
SI,SETUP
SI,HOLD
SO,VALID
NSS,SCK
SCK,NSS
NSS,HIGH
OSC
SCK
M
M
is calculated assuming a t
th
Sept. 2010
Description
Low level output voltage
High level output source current
Low level output sink current
SCK max clock frequency
SCK low time (% of SCK cycle)
SCK high time (% of SCK cycle)
SI setup time
SI hold time
SO valid time (% of SCK cycle)
NSS low to SCK rising edge
SCK falling edge to NSS high
NSS rising to falling edge
Programmable pull-up/down
resistors for IO[0-7]
Oscillator frequency
SO,VALID
of maximum 1/3 of SCK cycle. This gives 1/6 of SCK cycle as setup time to the host controller.
Table 6 – Electrical Specifications
SO,VALID
is also shown in §3 to allow the user to calculate the maximum SPI frequency
Internal (SX1511/12B)
After SCK falling edge
External from OSCIN
(40-60% duty cycle)
Internal (SX1510B)
VDDM >= 2V
VDDM >= 2V
VDDM < 2V
VDDM < 2V
Conditions
10
-
-
-
-
-
-
-
-
-
-
World’s Lowest Voltage Level Shifting GPIO
SX1510B/SX1511B/SX1512B
with LED Driver and Keypad Engine
Min
-0.4
1.1
1.3
45
45
25
25
25
9
9
-
-
-
-
-
-
-
-
20
Typ
42
2
2
-
-
-
-
-
-
-
-
-
-
-
-
-
-
(4)
www.semtech.com
Max
33
0.3
2.6
2.6
55
55
8
2
8
4
3
-
-
-
-
-
-
-
(4)
V
mA
mA
MHz
%
%
ns
ns
%
ns
ns
ns
MHz
Unit
k