SX1504屬于集成電路（IC）的I/O擴(kuò)展器。由升特制造生產(chǎn)的SX1504I/O 擴(kuò)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(shè)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(jī)設(shè)備上的幾根 I/O 線，即可讀/寫擴(kuò)展器設(shè)備上的許多輸入/輸出引腳的狀態(tài)。該技術(shù)的通信速度不佳，但連通性較高，最適合快速響應(yīng)不是很關(guān)鍵的應(yīng)用，例如許多人機(jī)界面應(yīng)用。

GENERAL DESCRIPTION

The SX1504, SX1505 and SX1506 are complete 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

? 2.5V 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 (SX1504/SX1505)

? Ultra-Thin 4x4mm QFN-UT-28 and TSSOP-28 packages (SX1506)

TYPICAL APPLICATIONS

? Cell phones, PDAs, MP3 players

? Digital camera

? Portable multimedia player

? Notebooks

? GPS Units

? Industrial, ATE

? Any battery powered equipment