SX1503I091TRT屬于集成電路（IC）的I/O擴展器。由升特制造生產(chǎn)的SX1503I091TRTI/O 擴展器該系列器件可與微控制器、微處理器或類似器件結(jié)合使用，目的是增加可用于連接外設的信號連接數(shù)量。典型的工作概念涉及使用串行通信，只需主機設備上的幾根 I/O 線，即可讀/寫擴展器設備上的許多輸入/輸出引腳的狀態(tài)。該技術的通信速度不佳，但連通性較高，最適合快速響應不是很關鍵的應用，例如許多人機界面應用。

GENERAL DESCRIPTION

The SX1501, SX1502 and SX1503 are complete ultra low voltage General Purpose parallel Input/Output (GPIO) expanders ideal for low power handheld battery powered equipment. They allow easy serial expansion of I/O through a standard 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.

KEY PRODUCT FEATURES

? 4/8/16 channel of I/Os

? True bi-directional style I/O

? Programmable Pull-up/Pull-down

? Push/Pull outputs

? 1.2V to 5.5V independent operating voltage for all supply rails (VDDM, VCC1, VCC2)

? 5.5V compatible I/Os, up to 24mA output sink (no total sink current limit)

? Fully programmable logic functions (PLD)

? 400kHz 2-wire I2C compatible slave interface

? Open drain active low interrupt output (NINT)

? Bit maskable

? Programmable edge sensitivity

? Power-On Reset and reset input (NRESET)

? Ultra low current consumption of typ. 1uA

? -40°C to +85°C operating temperature range

? Ultra-Thin 3x3mm QFN-UT-20 and TSSOP-20 packages (SX1501/SX1502)

? Ultra-Thin 4x4mm QFN-UT-28 and TSSOP-28 packages (SX1503)

TYPICAL APPLICATIONS

? Cell phones, PDAs, MP3 players

? Digital camera

? Portable multimedia player

? Notebooks

? GPS Units

? Industrial, ATE

? Any battery powered equipment