SX1510B Datasheet, PDF (1/43 Pages) Semtech Corporation – World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine

SX1510B/SX1511B/SX1512B
World’s Lowest Voltage Level Shifting GPIO
with LED Driver and Keypad Engine
ADVANCED COMMUNICATIONS & SENSING
SX1510B/SX1511B/SX1512B
World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine
GENERAL DESCRIPTION
The SX1510B, SX1511B and SX1512B are complete
ultra low voltage General Purpose parallel
Input/Output (GPIO) expanders ideal for low power
handheld battery powered equipment. This family of
GPIOs comes in 4-, 8-, 16-channel configuration and
allows easy serial expansion of I/O through a
standard SPI interface. GPIO devices can provide
additional control and monitoring when the
microcontroller or chipset has insufficient I/O ports, or
in systems where serial communication and control
from a remote location is advantageous.
These devices can also act as a level shifter to
connect a microcontroller running at one voltage level
to a component running at a different voltage level,
thus eliminating the need for extra level translating
circuits. The core is operating as low as 1.2V
(SX1510B) while the dual I/O banks can operate
between 1.2V and 5.5V (SX1510B) independent of
the core voltage and each other (5.5V tolerant).
The SX1510B, SX1511B and SX1512B feature a fully
programmable LED Driver with internal oscillator for
enhanced lighting control such as intensity (via 256-
step PWM), blinking and breathing (fade in/out) make
them highly versatile for a wide range of LED
applications.
In addition, keypad applications are also supported
with an on-chip scanning engine that enables
continuous keypad monitoring up to 64 keys without
any additional host interaction reducing the bus
activity.
The SX1510B, SX1511B and SX1512B have the
ability to generate mask-programmable interrupts
based on a falling/rising edge of any of its GPIO lines.
A dedicated pin (NINT) indicates to a host controller
that a state change occurred on one or more of the
lines. Each GPIO is programmable via a bank of 8-bit
configuration registers that include data, direction,
pull-up/pull-down, interrupt mask and interrupt
registers. These I/O expanders feature small footprint
packages and are rated from -40°C to +85°C
temperature range.
ORDERING INFORMATION
Part Number
SX1510BXXX⁽¹⁾
SX1511BIULTRT
SX1512BIULTRT
SX1512BEVK
(1)_{Future product}
I/Os
4
8
16
16
Package
QFN-UT-14
QFN-UT-20
QFN-UT-28
Evaluation Kit
Marking
-
JKA5
KA25
-
KEY PRODUCT FEATURES
• 1.2V to 5.5V (SX1510B) Low Operating
Voltage with Dual Independent I/O Rails
(VCC1, VCC2)
Enable Direct Level Shifting Between I/O
Banks and Host Controller
• 5.5V Tolerant I/Os, Up to 15mA Output Sink on
All I/Os (No Total Sink Current Limit)
• Integrated LED Driver for Enhanced Lighting
Intensity Control (256-step PWM)
Blink Control (224 On/Off values)
Breathing Control (224 Fade In/Out values)
• On-Chip Keypad Scanning Engine
Support Up to 8x8 Matrix (64 Keys)
Configurable Input Debouncer
• 4/8/16 Channels of True Bi-directional Style I/O
Programmable Pull-up/Pull-down
Push/Pull or Open-drain outputs
Programmable Polarity
• Open Drain Active Low Interrupt Output (NINT)
Bit Maskable
Programmable Edge Sensitivity
• Built-in Clock Management (Internal 2MHz
Oscillator/External Clock Input, 7 clock values)
OSCIO can be Configured as GPO
• SPI Compatible Slave Interface (up to 20MHz)
• Power-On Reset and Reset Input (NRESET)
• Ultra Low Current Consumption: 1uA Typ
• -40°C to +85°C Operating Temperature Range
• Up to 2kV HBM ESD Protection
• Small Footprint Packages
• Pb & Halogen Free, RoHS/WEEE compliant
TYPICAL APPLICATIONS
• Cell phones, PDAs, MP3 players
• Digital camera, Notebooks, GPS Units
• Any battery powered equipment
Host
Controller
VDDM
1.425 - 3.6V
SPI _SX1511B
NINT
NRESET
VCC1
1.2 - 3.6V
IO0
IO1
IO2
IO3
VCC2
1.2 - 3.6V
IO4
IO5
IO6
IO7
LEVEL SHIFTING
FULL LED DRIVE
KEYPAD SCANNING
Rev 3 – 9^th Sept. 2010
1
BUTTON CONTROL
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