MAXIM MAX7317 User Manual

19-3380; Rev 2; 4/05

THIN QFN

MAX7317ATE

13

14

15

1234

5

6

16

12 11 10 9

8

7

V+

DIN

SCLK

P0

P1

P2

P3

P9

P8

P7

CS

P5

P6

GND

P4

DOUT

TOP VIEW

10端口、SPI接口I/O扩展器，

具有过压和热插入保护

____________________________________

概述

MAX7317串行接口外设器件能够为微处理器提供10个I/O
端口，额定电压为7V。每个端口都可单独配置为漏极开
路输出或带有过压保护的施密特输入。

MAX7317支持热插入。所有端口引脚在关闭电源时 (V+ =
0V) 具有高阻抗，并允许有8V电压。

MAX7317采用16引脚、薄型QFN和QSOP封装，工作在

-40°C至+125°C的温度范围。

如需具有恒定电流输出和8位PWM控制的类似器件，请
参考MAX6966/MAX6967的数据资料。

____________________________________

应用

便携式设备

蜂窝电话

白色家电

工业控制器

汽车

系统监视

____________________________________

高速、26MHz、SPITM/QSPITM/MICROWIRE

♦

兼容的串行接口

2.25V至3.6V工作电压

♦

I/O端口输入过压保护至7V

♦

I/O端口为7V额定电压的开漏极输出

♦

I/O端口支持热插入

♦

0.7µA (典型值)，1.9µA (最大值) 的待机电流

♦

微型3mm x 3mm、高度为0.8mm的薄型QFN 封装

♦

-40°C至+125°C工作温度范围

♦

________________________________

PART

MAX7317ATE

TEMP

RANGE

-40°C to
+125°C

PIN­PACKAGE

16 Thin QFN
3mm x 3mm x

0.8mm

TM

定购信息

TOP

MARK

ACH T1633-4

特性

MAX7317

PKG

CODE

SPI与 QSPI是Motorola, Inc.的商标。
MICROWIRE是 National Semiconductor Corp.的商标。

____________________________

+3.3V

µC

MAX7317

SCLK

MOSI

MISO

CS

本文是Maxim 正式英文资料的译文，Maxim 不对翻译中存在的差异或由此产生的错误负责。请注意译文中可能存在文字组织或

SCLK

DIN

DOUT

CS

GND

________________________________________________________________ Maxim Integrated Products 1

典型应用电路

P0
P1
P2
P3
P4
P5
P6
P7
P8
P9

I/O PORTS

MAX7317AEE

_______________________________

引脚配置 (续) 见数据资料的最后部分。

-40°C to
+125°C

16 QSOP — —

引脚配置

翻译错误，如需确认任何词语的准确性，请参考 Maxim提供的英文版资料。

索取免费样品和最新版的数据资料，请访问Maxim的主页：www.maxim-ic.com.cn。

10端口、SPI接口I/O扩展器，
具有过压和热插入保护

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

MAX7317

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.

Continuous Power Dissipation (T

16-Pin Thin QFN

(derate 14.7mW/°C above +70°C).........................1176mW

16-Pin QSOP (derate 8.3mW/°C above +70°C)...........667mW

Operating Temperature Range

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

to T

(T

MIN

) ..............................................-40°C to +125°C

MAX

ELECTRICAL CHARACTERISTICS

(Typical Operating Circuit, V+ = 2.25V to 3.6V, TA= T
(Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Operating Supply Voltage V+ 2.25 3.60 V

Output Load External Supply
Voltage P0–P9

Standby Current
(Interface Idle)

Supply Current I

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) V

Output Low Short-Circuit Current
(P0–P9)

Output High Voltage (DOUT) V

Output Low Voltage (DOUT) V

Power-On Reset Voltage V

V

EXT

I

STBY

+

V

IH

V

IL

I

, I

IH

IL

OLP_ISINK

OHDOUTISOURCE

OLDOUTISINK

POR

to T

MIN

All digital inputs at V+
or GND

f

= 26MHz; other

SCLK

digital inputs at V+ or
GND; DOUT unloaded

P0–P9 output register set to 0x01 0.7 x V+ V

P0–P9 output register set to 0x01 0.3 x V+ V

(Note 2) 10 pF

= 0.5mA, output register set to 0x00 0.4 V

V

OLPOUT

= 6mA 0.3 V

, unless otherwise noted. Typical values are at V+ = 3.3V, TA= +25°C.)

MAX

TA = +25°C 0.70 1.5

T

A

T

A

TA = +25°C 385 620

T

A

T

A

= 5V 10.8 20 mA

= -6mA V+ - 0.3V V

to +85°C 1.7

= T

MIN

to T

= T

MIN

MAX

to +85°C 680

= T

MIN

to T

= T

MIN

MAX

= +70°C)

A

7V

1.9

730

-0.2 +0.2 µA

2V

µA

µA

2 _______________________________________________________________________________________

10端口、SPI接口I/O扩展器，

具有过压和热插入保护

TIMING CHARACTERISTICS

(Typical Operating Circuit, V+ = 2.25V to 3.6V, TA= T
(Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

SCLK Clock Period t

SCLK Pulse-Width High t

SCLK Pulse-Width Low t
CS Fall to SCLK Rise Setup
SCLK Rise to CS Rise Hold

DIN Setup Time t

DIN Hold Time t

Output Data Propagation Delay t

DOUT Output Rise and Fall
Times

Minimum CS Pulse High t

Note 1: All parameters are tested at TA= +25°C. Specifications over temperature are guaranteed by design.
Note 2: Guaranteed by design.

CP

CH

CL

t

CSS

t

CSH

DS

DH

DO

t

FT

CSW

C

to T

MIN

= 20pF (Note 2) 10 ns

LOAD

, unless otherwise noted. Typical values are at V+ = 3.3V, TA= +25°C.)

MAX

38.4 ns

19 ns

19 ns

9.5 ns

2.5 ns

9.5 ns

2.5 ns

38.4 ns

MAX7317

19 ns

____________________________________________________________________

MAX7317

I/O REGISTER

I/O PORTS

SCLK

CS

DIN

DOUT

_______________________________________________________________________________________ 3

4-WIRE SERIAL INTERFACE

MAX7317方框图

P0
P1
P2
P3
P4
P5
P6
P7
P8
P9

10端口、SPI接口I/O扩展器，

0

3

9

6

12

15

PORT SINK CURRENT

vs. PORT VOLTAGE

MAX7317 toc01

PORT VOLTAGE (V)

PORT SINK CURRENT (mA)

04268

TA = -40°C

TA = +25°C

TA = +85°C

TA = +125°C

0.4

0.6

0.5

0.8

0.7

0.9

1.0

-40 -10 5 20-25 35 50 65 80 95 110 125

STANDBY CURRENT

vs. TEMPERATURE

MAX7317 toc02

TEMPERATURE (°C)

STANDBY CURRENT (µA)

V+ = 3.6V

V+ = 3.3V

V+ = 2.7V

V+ = 2.25V

0

0.1

0.3

0.2

0.4

0.5

-40 -10 5 20-25 35 50 65 80 95 110 125

SUPPLY CURRENT (I+)

vs. TEMPERATURE

MAX7317 toc03

TEMPERATURE (°C)

STANDBY CURRENT (mA)

V+ = 3.6V

V+ = 3.3V

V+ = 2.7V

V+ = 2.25V

具有过压和热插入保护

_______________________________________________________________________典型工作特性

(TA = +25°C, unless otherwise noted.)

MAX7317

___________________________________________________________________________

QSOP QFN

3–7, 9–13 1–5, 7–11 P0–P9

4 _______________________________________________________________________________________

引脚

PIN

1 15 SCLK

216CS

8 6 GND Ground

14 12 DOUT

15 13 DIN

16 14 V+ Positive Supply Voltage. Bypass V+ to GND with a 0.047µF ceramic capacitor.

— PAD

NAME FUNCTION

名称 功能

Serial-Clock Input. On SCLK’s rising edge, data shifts into the internal shift register. On

串行时钟输入。数据在SCLK 信号的上升沿移入内部移位寄存器。数据在SCLK信号的下降沿由
DOUT同步输出。只有在CS为低电平时SCLK 才有效。

SCLK’s falling edge, data is clocked out of DOUT. SCLK is active only while CS is low.

Chip-Select Input. Serial data is loaded into the shift register while CS is low. The most recent

片选输入。当CS为低电平时，串行数据装入移位寄存器。最后的16 位数据在CS信号的上升沿
锁存。

16 bits of data latch on CS’s rising edge.

I/O Ports. P0 to P9 can be configured as open-drain, current-sink outputs rated at 20mA

I/O端口。P0至P9 可以配置为开漏极输出，输出能吸收20mA 的最大额定电流，或者配置为CMOS

maximum, or as CMOS inputs, or as open-drain outputs. Loads should be connected to a

输入，或者开漏极输出。负载应接至不超过7V 的电源电压上。

supply voltage no higher than 7V.

地

Serial-Data Output. The data into DIN is valid at DOUT 15.5 clock cycles later. Use this pin to

串行数据输出。进入DIN 的数据经过15.5个时钟周期后在DOUT输出。使用该引脚可以以菊花链

daisy-chain several devices or allow data readback. Output is push-pull.

结构连接多个器件，或者允许数据回读。输出为推挽式结构。

Serial-Data Input. Data from DIN loads into the internal 16-bit shift register on SCLK’s rising

串行数据输入。数据在SCLK 信号的上升沿由DIN移入内部16位移位寄存器。

edge.

正电源电压。用0.047µF陶瓷电容将 V+ 旁路至 GND。

Exposed

裸露焊盘

pad

Exposed Pad on Package Underside. Connect to GND.

封装底部的裸露焊盘。接GND。

引脚说明