I/O Expander. MAX7317 Datasheet


MAX7317 Expander. Datasheet pdf. Equivalent


MAX7317


10-Port SPI-Interfaced I/O Expander
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 ...



MAX7317
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 Power-Supply Requirements
0.7μA (typ), 1.9μA (max) Standby Current
• 3mm x 3mm, 0.8mm High TQFN Package
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
TOP
MARK
16 TQFN-EP*
MAX7317ATE+ -40°C to +125°C 3mm x 3mm x
0.8mm
ACH
MAX7317AEE+ -40°C to +125°C 16 QSOP
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Pin Configurations
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
TQFN
Pin Configurations continued at end of data sheet.
19-3380; Rev 4; 4/15

MAX7317
MAX7317
10-Port SPI-Interfaced I/O Expander with
Overvoltage and Hot-Insertion Protection
Absolute Maximum Ratings
Voltage (with respect to GND)
V+.............................................................................-0.3V to +4V
SCLK, DIN, CS, DOUT................................-0.3V to (V+ + 0.3V)
P_ ............................................................................-0.3V to +8V
DC Current into P_ .............................................................24mA
DC Current into DOUT........................................................10mA
Total GND Current.............................................................200mA
Continuous Power Dissipation (TA = +70°C)
16-Pin TQFN (derate 14.7mW/°C above +70°C)....... 1176mW
16-Pin QSOP (derate 8.3mW/°C above +70°C)..........667mW
Operating Temperature Range
(TMIN to TMAX).............................................. -40°C to +125°C
Junction Temperature.......................................................+150°C
Storage Temperature Range............................. -65°C to +150°C
Lead Temperature (soldering, 10s).................................. +300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Electrical Characteristics
(Typical Operating Circuit, V+ = 2.25V to 3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at V+ = 3.3V, TA = +25°C.)
(Note 1)
PARAMETER
Operating Supply Voltage
Output Load External Supply
Voltage P0–P9
Standby Current
(Interface Idle)
Supply Current
Input High Voltage
(P0–P9, DIN, SCLK, CS)
Input Low Voltage
(P0–P9, DIN, SCLK, CS)
Input Leakage Current
(P0–P9, DIN, SCLK, CS)
Input Capacitance
(P0–P9, DIN, SCLK, CS
Output Low Voltage (P0–P9)
Output Low Short-Circuit Current
(P0–P9)
Output High Voltage (DOUT)
Output Low Voltage (DOUT)
Power-On Reset Voltage
SYMBOL
V+
CONDITIONS
MIN
2.25
TYP
VEXT
ISTBY
I+
VIH
All digital inputs at V+
or GND
fSCLK = 26MHz; other
digital inputs at V+ or
GND; DOUT unloaded
TA = +25°C
TA = TMIN to +85°C
TA = TMIN to TMAX
TA = +25°C
TA = TMIN to +85°C
TA = TMIN to TMAX
0.70
385
P0–P9 output register set to 0x01
0.7 x V+
MAX
3.60
7
1.5
1.7
1.9
620
680
730
UNITS
V
V
µA
µA
V
VIL P0–P9 output register set to 0x01
0.3 x V+ V
IIH, IIL
-0.2
+0.2
µA
(Note 2)
VOLP_ ISINK = 0.5mA, output register set to 0x00
VOLPOUT = 5V
VOHDOUT
VOLDOUT
VPOR
ISOURCE = -6mA
ISINK = 6mA
10
10.8
V+ - 0.3V
2
0.4
20
0.3
pF
V
mA
V
V
V
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