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SX1509BEVK Datasheet(PDF) 1 Page - Semtech Corporation |
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SX1509BEVK Datasheet(HTML) 1 Page - Semtech Corporation |
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1 / 37 page  ADVANCED COMMUNICATIONS & SENSING Rev 4 – 26 th April 2011 1 www.semtech.com SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine SX1508B/SX1509B World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine GENERAL DESCRIPTION The SX1508B and SX1509B 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 8-, 16-channel configuration and allows easy serial expansion of I/O through a standard 400kHz I 2C 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 SX1508B and SX1509B 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 bus activity. The SX1508B and SX1509B 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 SX1508BIULTRT 8 QFN-UT-20 GAA2 SX1509BIULTRT 16 QFN-UT-28 GBA3 SX1508BEVK 8 Evaluation Kit - SX1509BEVK 16 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 • 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 I 2C Compatible Slave Interface • 4 User-Selectable I²C Slave Addresses • 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 I2C NRESET NINT VDDM 1.425 - 3.6V VCC1 1.2 - 3.6V VCC2 1.2 - 3.6V SX1508B FULL LED DRIVE KEYPAD SCANNING BUTTON CONTROL Host Controller IO0 IO1 IO2 IO3 IO4 IO5 IO6 IO7 LEVEL SHIFTING |
Similar Part No. - SX1509BEVK |
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Similar Description - SX1509BEVK |
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