Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsInterface ICsInterface IC - I/O extensions PWM SPI 26 MHz TQFN 16 EP

Pin Configurations continued at end of data sheet.

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

● System Monitoring

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

QSPI is a trademark of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

PART TEMP RANGE

PIN-

PACKAGE

TOP

MARK

MAX7317ATE+ -40°C to +125°C

16 Thin QFN

3mm x 3mm x

0.8mm

ACH

MAX7317AEE+ -40°C to +125°C 16 QSOP —

THIN QFN

MAX7317ATE

1 2 3 4

12 11 10 9

V+

DIN

SCLK

GND

DOUT

TOP VIEW

µC

DIN

DOUT

SCLK

GND

MOSI

MISO

SCLK

I/O PORTS

MAX7317

+3.3V

MAX7317 10-Port SPI-Interfaced I/O Expander with

Overvoltage and Hot-Insertion Protection

19-3380; Rev 3; 6/14

Pin Congurations

Ordering Information

Typical Application Circuit

+Denotes a lead(Pb)-free/RoHS-compliant package.

Summary of content (11 pages)

PAGE 1
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.
PAGE 2
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....
PAGE 3
MAX7317 10-Port SPI-Interfaced I/O Expander with Overvoltage and Hot-Insertion Protection Timing 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 SYMBOL CONDITIONS MIN TYP MAX UNITS SCLK Clock Period tCP 38.4 ns SCLK Pulse-Width High tCH 19 ns SCLK Pulse-Width Low tCL 19 ns CS Fall to SCLK Rise Setup Time tCSS 9.5 ns SCLK Rise to CS Rise Hold Time tCSH 2.
PAGE 4
MAX7317 10-Port SPI-Interfaced I/O Expander with Overvoltage and Hot-Insertion Protection Typical Operating Characteristics (TA = +25°C, unless otherwise noted.) TA = +85°C 9 TA = +125°C 6 3 0 0.9 0.8 0.7 2 4 6 8 V+ = 2.7V V+ = 3.3V 0.6 0.5 0 V+ = 3.6V 0.4 V+ = 2.25V -40 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE (°C) PORT VOLTAGE (V) 0.4 SUPPLY CURRENT (I+) vs. TEMPERATURE V+ = 3.6V V+ = 3.3V MAX7317 toc03 TA = +25°C 0.5 STANDBY CURRENT (mA) TA = -40°C 12 1.
PAGE 5
MAX7317 Detailed Description The MAX7317 is a general-purpose input/output (GPIO) peripheral that provides 10 I/O ports, P0 to P9, controlled through a high-speed SPI-compatible serial interface. The 10 I/O ports can be used as inputs or open-drain outputs in any combination. Ports withstand 7V independent of the MAX7317’s supply voltage whether used as inputs or outputs. Figure 1 shows the I/O port structure of the MAX7317.
PAGE 6
MAX7317 10-Port SPI-Interfaced I/O Expander with Overvoltage and Hot-Insertion Protection Table 1.
PAGE 7
MAX7317 10-Port SPI-Interfaced I/O Expander with Overvoltage and Hot-Insertion Protection Connecting Multiple MAX7317s to the 4-Wire Bus Multiple MAX7317s can be interfaced to a common SPI bus by connecting DIN inputs together, SCLK inputs together, and providing an individual CS per the MAX7317 device (Figure 2). This connection works regardless of the configuration of DOUT/OSC, but does not allow the MAX7317s to be read. Table 3.
PAGE 8
MAX7317 10-Port SPI-Interfaced I/O Expander with Overvoltage and Hot-Insertion Protection Alternatively, MAX7317s can be daisy-chained by connecting the DOUT of one device to the DIN of the next, and driving SCLK and CS lines in parallel (Figure 3). This connection allows the MAX7317s to be read. Data at DIN propagates through the internal shift registers and appears at DOUT 15.5 clock cycles later, clocked out on the falling edge of SCLK.
PAGE 9
MAX7317 10-Port SPI-Interfaced I/O Expander with Overvoltage and Hot-Insertion Protection MOSI DIN CS µC CS SCLK DOUT DOUT DIN CS MAX7317 SCLK DOUT DIN CS MAX7317 MAX7317 SCLK SCLK MISO Figure 3. MAX7317 Daisy-Chain Connection CS tCSW tCL tCP tCH tCSS tCSH SCLK tDS tDH DIN D15 D14 D1 D0 tDO DOUT D15 Figure 4. Timing Diagram CS SCLK DIN D15 =0 D14 D13 D12 D11 D10 D9 D8 D7 D6 DOUT D5 D4 D3 D2 D1 D0 D15 = 0 . Figure 5.
PAGE 10
MAX7317 10-Port SPI-Interfaced I/O Expander with Overvoltage and Hot-Insertion Protection CS SCLK DIN BIT 1 BIT 2 DOUT N-15 N-31 N-14 N-13 N-12 N-11 N-10 N-9 N-8 N-7 N-30 N-29 N-28 N-27 N-26 N-25 N-24 N-23 N-6 N-5 N-4 N-3 N-2 N-1 N N-22 N-21 N-20 N-19 N-18 N-17 N-16 . Figure 6.
PAGE 11
MAX7317 10-Port SPI-Interfaced I/O Expander with Overvoltage and Hot-Insertion Protection Revision History REVISION NUMBER REVISION DATE PAGES CHANGED 2 4/05 — 3 5/14 No /V OPNs; removed automotive reference from Applications section; updated Packaging Information DESCRIPTION 1–17 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.