sx150x_89b-datasheet

ADVANCED COMMUNICATIONS & SENSING
Rev 4 – 26
th
April 2011 4 www.semtech.com
SX1508B/SX1509B
World’s Lowest Voltage Level Shifting GPIO
with LED Driver and Keypad Engine
1 P IN DESCRIPTION
1.1 SX1508B 8-channel I
2
C GPIO with LED Driver and Keypad Engine
Pin Symbol Type Description
1 NRESET DI Active low reset input
2 SDA DIO I
2
C serial data line
3 SCL DI I
2
C serial clock line
4 ADDR0 DI Address input bit 0, connect to VDDM or GND
5 I/O[0] DIO
(*1)
I/O[0], at power-on configured as an input
LED driver : Intensity control (PWM)
6 I/O[1] DIO
(*1)
I/O[1], at power-on configured as an input
LED driver : Intensity control (PWM)
7 VCC1 P Supply voltage for Bank A I/O[3-0]
8 GND P Ground Pin
9 I/O[2] DIO
(*1)
I/O[2], at power-on configured as an input
LED driver : Intensity control (PWM), Blinking
10 I/O[3] DIO
(*1)
I/O[3], at power-on configured as an input
LED driver : Intensity control (PWM), Blinking, Breathing (Fade In/Out)
11 NINT DO Active low interrupt output
12 ADDR1 DI Address input bit 1, connect to VDDM or GND
13 OSCIO DIO
(*1)
Oscillator input/output, can also be used as GPO
14 VDDM P Main supply voltage
15 I/O[4] DIO
(*1)
I/O[4], at power-on configured as an input
LED driver : Intensity control (PWM)
16 I/O[5] DIO
(*1)
I/O[5], at power-on configured as an input
LED driver : Intensity control (PWM)
17 VCC2 P Supply voltage for Bank B I/O[7-4]
18 GND P Ground Pin
19 I/O[6] DIO
(*1)
I/O[6], at power-on configured as an input
LED driver : Intensity control (PWM), Blinking
20 I/O[7] DIO
(*1)
I/O[7], at power-on configured as an input
LED driver : Intensity control (PWM), Blinking, Breathing (Fade In/Out)
D/I/O/P: Digital/Input/Output/Power
(*1)
This pin is programmable through the I
2
C interface
Table 1 – SX1508B Pin Description
Figure 1 – SX1508B QFN-UT-20 Pinout
NRESET
SDA
SCL
ADDR0
I/O[0]
I/O[1]
VCC1
GND
I/O[2] I/O[3]
I/O[4]
VDDM
OSCIO
ADDR1
NINT
I/O[7] I/O[6] GND VCC2 I/O[5]
GND
(PAD)