MAX7317 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – 10-Port SPI-Interfaced I/O Expander with Overvoltage and Hot-Insertion Protection

19-3380; Rev 2; 4/05
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 thin QFN 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
Automotive
System Monitoring
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
Features
♦ High-Speed, 26MHz SPI™-/QSPI-™/MICROWIRE™-
Compatible Serial Interface
♦ 2.25V to 3.6V 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
♦ 0.7µA (typ), 1.9µA (max) Standby Current
♦ Tiny 3mm x 3mm, 0.8mm High Thin QFN Package
♦ -40°C to +125°C Temperature Range
Ordering Information
PART
TEMP PIN-
RANGE PACKAGE
TOP PKG
MARK CODE
MAX7317ATE
-40°C to
+125°C
16 Thin QFN
3mm x 3mm x
0.8mm
ACH
T1633-4
MAX7317AEE
-40°C to
+125°C
16 QSOP
—
—
Typical Application Circuit
Pin Configurations
µC
SCLK
MOSI
MISO
CS
+3.3V
SCLK ^MAX7317
DIN
P0
DOUT
P1
P2
CS
P3
P4
P5
P6
P7
P8
GND
P9
I/O PORTS
TOP VIEW
12 11 10 9
DIN 13
V+ 14
SCLK 15
CS 16
MAX7317ATE
12 34
8 P6
7 P5
6 GND
5 P4
THIN QFN
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.