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SX1512BIULTRT Datasheet(PDF) 1 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
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SX1512BIULTRT Datasheet(HTML) 1 Page - Semtech Corporation

 
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ADVANCED COMMUNICATIONS & SENSING
Rev 3 – 9
th Sept. 2010
1
www.semtech.com
SX1510B/SX1511B/SX1512B
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
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
I/Os
Package
Marking
SX1510BXXX
(1)
4
QFN-UT-14
-
SX1511BIULTRT
8
QFN-UT-20
JKA5
SX1512BIULTRT
16
QFN-UT-28
KA25
SX1512BEVK
16
Evaluation Kit
-
(1)
Future product
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
SPI
NRESET
NINT
VDDM
1.425 - 3.6V
VCC1
1.2 - 3.6V
VCC2
1.2 - 3.6V
SX1511B
FULL LED DRIVE
KEYPAD SCANNING
BUTTON CONTROL
Host
Controller
IO0
IO1
IO2
IO3
IO4
IO5
IO6
IO7
LEVEL SHIFTING


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