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Semtech SX1508B & SX1509B Ultra-Low Voltage GPIOs

Semtech SX1508B and SX1509B Ultra-Low Voltage GPIOs are general-purpose parallel input/output expanders ideal for low-power handheld battery-powered equipment. This family of GPIOs comes in 4-, 8-, and 16-channel configuration options and allows easy serial expansion of I/O through a standard 400kHz I2C interface. These devices come with a fully programmable LED Driver with an internal oscillator for enhanced lighting control. 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.

Features

  • Low 1.2V up to 5.5V operating voltage (depending on model) with dual independent I/O rails (VCC1, VCC2) enables direct level shifting between I/O banks and host controller
  • Integrated LED driver for enhanced lighting
    • 256-step PWM intensity control
    • 224 on/off values of blink control
    • 224 fade in/out values of breathing control
  • 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
  • 5.5V tolerant I/Os, up to 15mA output sink on all I/Os (no total sink current limit)
  • 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 1µA typical current consumption
  • -40°C to +85°C operating temperature range
  • Up to 2kV HBM ESD protection
  • Small footprint packages
  • Lead-free, Halogen Free, and RoHS/WEEE compliant

Applications

  • Cell phones, PDAs, and MP3 players
  • Digital camera, Notebooks, and GPS Units
  • Any battery powered equipment

Block Diagrams

Block Diagram - Semtech SX1508B & SX1509B Ultra-Low Voltage GPIOs

Evaluation Kits

Semtech SX1508 & SX1509 Evaluation Kits

Provide an evaluation platform for the SX1508, SX1509, and more generally for the SX1507/8/9 family.

Learn Moreüber Semtech SX1508 & SX1509 Evaluation Kits View Productsverwandt mit Semtech SX1508 & SX1509 Evaluation Kits
Veröffentlichungsdatum: 2015-10-29 | Aktualisiert: 2023-05-23