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朱亮成 
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Benefits and Features
● Industry-Standard 4-Wire Interface Simplifies
Expansion of I/O Ports to Up to 28 I/Os Independent
of Microprocessor Architecture
• High-Speed, 26MHz, SPI-/QSPI™-/MICROWIRE®-
Compatible Serial Interface
• 2.25V to 5.5V Operation
• 20 or 28 I/O Ports Configurable as Push-Pull Logic
Output, Schmitt Logic Input or Schmitt Logic Input
with Internal Pullup
• Logic Transition Detection for Seven I/O Ports
● Low Power Consumption Reduces Power-Supply
Requirements
• 11μA (max) Shutdown Current
The MAX7301 compact, serial-interfaced I/O expander
(or general-purpose I/O (GPIO) peripheral) provides
microprocessors with up to 28 ports. Each port is individually
user configurable to either a logic input or logic output.
Each port can be configured either as a push-pull logic
output capable of sinking 10mA and sourcing 4.5mA, or
a Schmitt logic input with optional internal pullup. Seven
ports feature configurable transition detection logic, which
generates an interrupt upon change of port logic level.
The MAX7301 is controlled through an SPI-compatible
4-wire serial interface
询价
