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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 / 42 page  ADVANCED COMMUNICATIONS & SENSING Rev 3 – 9 th Sept. 2010 1 www.semtech.com SX1507QB/SX1508QB/SX1509QB World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine SX1507QB/SX1508QB/SX1509QB World’s Lowest Voltage Level Shifting GPIO with LED Driver and Keypad Engine GENERAL DESCRIPTION The SX1507QB, SX1508QB and SX1509QB 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 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 1.2V (SX1507QB) while the dual I/O banks can operate between 1.2V and 5.5V (SX1507QB) independent of the core voltage and each other (5.5V tolerant). The SX1507QB, SX1508QB and SX1509QB 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 SX1507QB, SX1508QB and SX1509QB 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 SX1507QBXXX (1) 4 QFN-UT-14 - SX1508QBIULTRT 8 QFN-UT-20 HAB7 SX1509QBIULTRT 16 QFN-UT-28 HCA5 SX1508BEVK 8 Evaluation Kit - SX1509BEVK 16 Evaluation Kit - (1) Future product KEY PRODUCT FEATURES • 1.2V to 5.5V (SX1507QB) 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 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 SX1508QB FULL LED DRIVE KEYPAD SCANNING BUTTON CONTROL Host Controller IO0 IO1 IO2 IO3 IO4 IO5 IO6 IO7 LEVEL SHIFTING |
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