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Shifting GPIO. SX1508 Datasheet

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Shifting GPIO. SX1508 Datasheet






SX1508 GPIO. Datasheet pdf. Equivalent




SX1508 GPIO. Datasheet pdf. Equivalent





Part

SX1508

Description

Lowest Voltage Level Shifting GPIO



Feature


SX1507/SX1508/SX1509 World’s Lowest Vo ltage Level Shifting GPIO with LED Driv er and Keypad Engine ADVANCED COMMUNICA TIONS & SENSING SX1507/SX1508/SX1509 World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine GENERAL DESCRIPTION The SX1507, SX150 8 and SX1509 are complete ultra low vol tage 1.2V to 3.6V General Purpose paral lel Input/Output (GPIO.
Manufacture

Semtech Corporation

Datasheet
Download SX1508 Datasheet


Semtech Corporation SX1508

SX1508; ) expanders ideal for low power handheld battery powered equipment. This family of GPIOs comes in 4-, 8-, 16-channel c onfiguration and allows easy serial exp ansion of I/O through a standard 400kHz I2C interface. GPIO devices can provid e additional control and monitoring whe n the microcontroller or chipset has in sufficient I/O ports, or in systems whe re serial communic.


Semtech Corporation SX1508

ation and control from a remote location is advantageous. These devices can al so act as a level shifter to connect a microcontroller running at one voltage level to a component running at a diffe rent voltage level, thus eliminating th e need for extra leve .


Semtech Corporation SX1508

.

Part

SX1508

Description

Lowest Voltage Level Shifting GPIO



Feature


SX1507/SX1508/SX1509 World’s Lowest Vo ltage Level Shifting GPIO with LED Driv er and Keypad Engine ADVANCED COMMUNICA TIONS & SENSING SX1507/SX1508/SX1509 World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine GENERAL DESCRIPTION The SX1507, SX150 8 and SX1509 are complete ultra low vol tage 1.2V to 3.6V General Purpose paral lel Input/Output (GPIO.
Manufacture

Semtech Corporation

Datasheet
Download SX1508 Datasheet




 SX1508
SX1507/SX1508/SX1509
World’s Lowest Voltage Level Shifting GPIO
with LED Driver and Keypad Engine
ADVANCED COMMUNICATIONS & SENSING
SX1507/SX1508/SX1509
World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine
GENERAL DESCRIPTION
The SX1507, SX1508 and SX1509 are complete ultra
low voltage 1.2V to 3.6V 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 400kHz I2C 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 1.425V while
the dual I/O banks can operate between 1.2V and
3.6V independent of the core voltage and each other
(5.5V tolerant).
The SX1507, SX1508 and SX1509 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 application is also supported with
the on-chip scanning engine which enables
continuous keypad monitoring up to 64 keys without
any additional host interaction and further reduce the
bus activity.
The SX1507, SX1508 and SX1509 have the ability to
generate mask-programmable interrupts based on
falling/rising edge of any of its GPIO lines. A
dedicated pin indicates to a host controller that a
state change occurred in one or more of the lines.
Each GPIO is programmable via 8-bit configuration
registers such as data registers, direction registers,
pull-up/pull-down registers, interrupt mask registers
and interrupt registers. These I/O expanders come in
small footprint packages and are rated from -40°C t o
+85°C temperature range.
ORDERING INFORMATION
Part Number
SX1507XXX(1)
SX1508IULTRT
SX1509IULTRT
SX1508EVK
SX1509EVK
(1) Future product
I/O
Channels
4
8
16
8
16
Package
QFN-UT-14
QFN-UT-20
QFN-UT-28
Evaluation Kit
Evaluation Kit
KEY PRODUCT FEATURES
1.2V to 3.6V 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
400kHz I2C Compatible Slave Interface
4 User-Selectable I²C Slave Addresses
Power-On Reset and Reset Input (NRESET)
Ultra Low Current Consumption of typ. 1uA
-40°C to +85°C Operating Temperature Range
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
Rev 1 – 30th Oct. 2009
1
www.semtech.com




 SX1508
SX1507/SX1508/SX1509
World’s Lowest Voltage Level Shifting GPIO
with LED Driver and Keypad Engine
ADVANCED COMMUNICATIONS & SENSING
Table of Contents
GENERAL DESCRIPTION ..................................................................................................................... 1
ORDERING INFORMATION................................................................................................................... 1
KEY PRODUCT FEATURES.................................................................................................................. 1
TYPICAL APPLICATIONS ..................................................................................................................... 1
1 PIN DESCRIPTION ...................................................................................................................... 4
1.1 SX1507 4-channel I2C GPIO with LED Driver
1.2 SX1508 8-channel I2C GPIO with LED Driver and Keypad Engine
1.3 SX1509 16-channel I2C GPIO with LED Driver and Keypad Engine
4
5
6
1.4 I/Os Feature Summary
7
2 ELECTRICAL CHARACTERISTICS............................................................................................... 8
2.1 Absolute Maximum Ratings
2.2 Electrical Specifications
8
8
3 TYPICAL OPERATING CHARACTERISTICS ............................................................................... 11
4 BLOCK DETAILED DESCRIPTION ............................................................................................. 12
4.1 SX1507 4-channel I2C GPIO with LED Driver
4.2 SX1508 8-channel I2C GPIO with LED Driver and Keypad Engine
4.3 SX1509 16-channel I2C GPIO with LED Driver and Keypad Engine
12
12
13
4.4 Reset
4.4.1 Hardware (NRESET)
4.4.2 Software (RegReset)
4.5 2-Wire Interface (I2C)
4.5.1 WRITE
4.5.2 READ
13
13
14
14
14
15
4.6 I/O Banks
4.6.1 Input Debouncer
4.6.2 Keypad Scanning Engine
4.6.3 Level Shifter
4.6.4 Polarity Inverter
15
15
16
16
18
4.7 Interrupt (NINT)
18
4.8 Clock Management
18
4.9 LED Driver
4.9.1 Overview
4.9.2 Static Mode
4.9.3 Single Shot Mode
4.9.4 Blink Mode
4.9.5 LED Driver Modes
4.9.6 Synchronization of LED Drivers across several ICs
4.9.7 Tutorial
18
18
19
20
20
20
21
22
5 CONFIGURATION REGISTERS.................................................................................................. 23
5.1 SX1507 4-channel GPIO with LED Driver
5.2 SX1508 8-channel GPIO with LED Driver and Keypad Engine
5.3 SX1509 16-channel GPIO with LED Driver and Keypad Engine
23
26
30
6 APPLICATION INFORMATION ................................................................................................... 36
6.1 Typical Application Circuit
6.2 Typical LED Connection
36
36
Rev 1 – 30th Oct. 2009
2
www.semtech.com




 SX1508
SX1507/SX1508/SX1509
World’s Lowest Voltage Level Shifting GPIO
with LED Driver and Keypad Engine
ADVANCED COMMUNICATIONS & SENSING
7 PACKAGING INFORMATION ..................................................................................................... 37
7.1 QFN-UT 14-pin Outline Drawing
7.2 QFN-UT 14-pin Land Pattern
7.3 QFN-UT 20-pin Outline Drawing
7.4 QFN-UT 20-pin Land Pattern
7.5 QFN-UT 28-pin Outline Drawing
7.6 QFN-UT 28-pin Land Pattern
37
37
38
38
39
39
8 SOLDERING PROFILE .............................................................................................................. 40
Rev 1 – 30th Oct. 2009
3
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