10-Port SPI-Interfaced I/O Expander
MAX7317
10-Port SPI-Interfaced I/O Expander with Overvoltage and Hot-Insertion Protection
General Description
The MAX7...
Description
MAX7317
10-Port SPI-Interfaced I/O Expander with Overvoltage and Hot-Insertion Protection
General Description
The MAX7317 serial-interfaced peripheral provides microprocessors with 10 I/O ports rated to 7V. Each port can be individually configured as either an open-drain output, or an overvoltage-protected Schmitt input.
The MAX7317 supports hot insertion. All port pins remain high impedance in power-down (V+ = 0V) with up to 8V asserted on them.
The MAX7317 is available in 16-pin TQFN and QSOP packages and operates in the -40°C to +125°C range.
For a similar part with constant-current outputs and 8-bit PWM controls, refer to the MAX6966/MAX6967 data sheet.
Applications
●● Portable Equipment ●● Cellular Phones ●● White Goods ●● Industrial Controllers ●● System Monitoring
QSPI is a trademark of Motorola, Inc. MICROWIRE is a registered trademark of National Semiconductor Corp.
Typical Application Circuit
µC SCLK MOSI MISO CS
+3.3V
MAX7317 SCLK
DIN DOUT CS
GND
P0 P1 P2 P3 P4 P5 P6 P7 P8 P9
I/O PORTS
Benefits and Features
●● Industry-Standard 4-Wire Interface Simplifies I/O Ports Expansion Independent of Microprocessor Architecture High-Speed, 26MHz, SPI-/QSPI™-/MICROWIRE®Compatible Serial Interface 2.25V to 3.6V Operation
●● Protection Circuitry Ensures Robust Operation I/O Port Inputs Are Overvoltage Protected to 7V I/O Port Outputs Are 7V-Rated Open Drain I/O Ports Support Hot Insertion
●● Low Power Consumption and Small Package Reduce Board Size and ...
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