SX1511B/SX1512B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine
●GENERAL DESCRIPTION:
■The SX1511 and SX1512 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 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 SX1511 and SX1512 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 SX1511 and SX1512 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 to +85°C temperature range.
●KEY PRODUCT FEATURES:
■ 1.2V to 3.6V Low Operating Voltage with DualIndependent I/O Rails (VCC1, VCC2)
▲Enable Direct Level Shifting Between I/OBanks and Host Controller
■ 5.5V Tolerant I/Os, Up to 15mA Output Sink onAll 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 2MHzOscillator/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
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SX1511B 、 SX1512B 、 SX1511BIULTRT 、 SX1512BIULTRT 、 SX1512BEVK |
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[ Cell phones ][ PDAs ][ MP3 players ][ Digital camera ][ Notebooks ][ GPS Units ][ battery powered equipment ] |
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Datasheet |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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26th April 2011 |
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Rev 4 |
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1.7 MB |
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