Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsInterface ICsInterface IC - I/O extensions POR I²C, SMBus 400 kHz SOIC 24 W

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General Description

The MAX7318 2-wire-interfaced expander provides 16-

bit parallel input/output (I/O) port expansion for SMBus™

and I

2

C applications. The MAX7318 consists of input

port registers, output port registers, polarity inversion

registers, configuration registers, and an I

2

C-compatible

serial interface logic compatible with SMBus. The sys-

tem master can invert the MAX7318 input data by writing

to the active-high polarity inversion register.

Any of the 16 I/O ports can be configured as an input or

output. A power-on reset (POR) initializes the 16 I/Os

as inputs. Three address select pins configure one of

64 slave ID addresses.

The MAX7318 supports hot insertion. All port pins, the

INT output, SDA, SCL, and the slave address inputs

AD0–2 remain high impedance in power-down (V+ =

0V) with up to 6V asserted upon them.

The MAX7318 is available in 24-pin SO, SSOP, TSSOP,

and thin QFN packages and is specified over the -40°C

to +125°C automotive temperature range.

For applications requiring an SMBus timeout function,

refer to the MAX7311 data sheet.

Applications

Servers

RAID Systems

Industrial Control

Medical Equipment

PLCs

Instrumentation and Test Measurement

Features

♦ 400kbps I

2

C-Compatible Serial Interface

♦ 2V to 5.5V Operation

♦ 5.5V Overvoltage-Tolerant I/Os

♦ Supports Hot Insertion

♦ 16 I/O Pins that Default to Inputs on Power-Up

♦ 100kΩ Pullup on Each I/O

♦ Open-Drain Interrupt Output (INT)

♦ Noise Filter on SCL/SDA Inputs

♦ 64 Slave ID Addresses Available

♦ Low Standby Current (5.4µA typ)

♦ Polarity Inversion

♦ 4mm

✕ 4mm, 0.8mm Thin QFN Package

♦ -40°C to +125°C Operation

MAX7318

2-Wire-Interfaced, 16-Bit, I/O Port Expander

with Interrupt and Hot-Insertion Protection

________________________________________________________________

Maxim Integrated Products

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Ordering Information

19-3381; Rev 3; 12/07

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

SMBus is a trademark of Intel Corp.

EVALUATION KIT

AVAILABLE

PART TEMP RANGE PIN-PACKAGE

PKG

CODE

MAX7318AWG -40°C to +125°C 24 Wide SO —

MAX7318AAG -40°C to +125°C 24 SSOP —

MAX7318ATG -40°C to +125°C

24 Thin QFN

(4mm

✕ 4mm)

T2444-4

MAX7318AUG -40°C to +125°C 24 TSSOP —

TOP VIEW

24

23

22

21

20

19

18

17

1

2

3

4

5

6

7

8

V+

SDA

SCL

AD0I/O0

AD2

AD1

I/O15

I/O14

I/O13

I/O12I/O4

I/O3

I/O2

I/O1

16

15

14

13

9

10

11

12

I/O11

I/O10

I/O9

I/O8GND

I/O7

I/O6

I/O5

TSSOP/SSOP/SO

MAX7318

INT

THIN QFN

MAX7318ATG

19

20

21

22

12 3456

18 17 16 15 14 13

23

24

12

11

10

9

8

7

SCL

V+

SDA

INT

AD2

I/O0

I/O1

I/O2

I/O3

I/O4

I/O5

AD0

I/O15

I/O13

I/O12

I/O11

AD1

I/O10

I/O8

I/O9

GND

I/O6

I/O7

I/O14

Pin Configurations

Summary of content (19 pages)

PAGE 1
KIT ATION EVALU E L B AVAILA 19-3381; Rev 3; 12/07 2-Wire-Interfaced, 16-Bit, I/O Port Expander with Interrupt and Hot-Insertion Protection Features The MAX7318 2-wire-interfaced expander provides 16bit parallel input/output (I/O) port expansion for SMBus™ and I2C applications. The MAX7318 consists of input port registers, output port registers, polarity inversion registers, configuration registers, and an I2C-compatible serial interface logic compatible with SMBus.
PAGE 2
MAX7318 2-Wire-Interfaced, 16-Bit, I/O Port Expander with Interrupt and Hot-Insertion Protection ABSOLUTE MAXIMUM RATINGS V+ to GND ................................................................-0.3V to +6V I/O0–I/O15 as Inputs ....................................(GND - 0.3V) to +6V SCL, SDA, AD0, AD1, AD2, INT...................(GND - 0.3V) to +6V Maximum V+ Current......................................................+250mA Maximum GND Current ...................................................
PAGE 3
2-Wire-Interfaced, 16-Bit, I/O Port Expander with Interrupt and Hot-Insertion Protection (V+ = 2V to 5.5V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at V+ = 3.3V, TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS Leakage Current MIN TYP -1 Input Capacitance MAX UNITS +1 µA 4 pF INT Low-Level Output Current IOL VOL = 0.4V 6 mA AC ELECTRICAL CHARACTERISTICS (V+ = 2V to 5.5V, TA = -40°C to +125°C, unless otherwise noted.
PAGE 4
Typical Operating Characteristics (TA = +25°C, unless otherwise noted.) 60 50 V+ = 3.3V 40 30 20 V+ = 2V V+ = 5V 8 V+ = 3.3V 6 4 V+ = 2V 70 60 50 40 30 20 2 10 0 0 -25 0 25 50 75 100 125 -50 -25 50 MAX7318 toc04 V+ = 2V TA = -40°C 50 75 100 V+ = 3.3V 50 8 6 4 2 0 0.2 0.3 0.4 0.5 TA = +25°C 25 20 TA = +125°C 20 TA = +125°C 15 10 5 5 0 0 0.1 0.2 0.3 0.4 0.5 0 0.6 0.1 0.2 0.3 0.4 VOL (V) I/O OUTPUT LOW VOLTAGE vs. TEMPERATURE I/O SOURCE CURRENT vs.
PAGE 5
2-Wire-Interfaced, 16-Bit, I/O Port Expander with Interrupt and Hot-Insertion Protection I/O SOURCE CURRENT vs. OUTPUT HIGH VOLTAGE TA = -40°C 40 MAX7318 toc11 V+ = 5V 45 I/O HIGH VOLTAGE vs. TEMPERATURE 500 MAX7318 toc10 50 400 V+ = 2V, ISOURCE = 10mA V+ - VOH (V) ISOURCE (mA) 35 TA = +25°C 30 25 20 300 200 TA = +125°C 15 100 10 5 V+ = 5V, ISOURCE = 10mA 0 0 0 0.1 0.2 0.3 0.4 0.5 0.
PAGE 6
MAX7318 2-Wire-Interfaced, 16-Bit, I/O Port Expander with Interrupt and Hot-Insertion Protection AD0 INPUT/OUTPUT PORT 1 I/O0 I/O1 I/O2 I/O3 I/O4 I/O5 I/O6 I/O7 INPUT/OUTPUT PORT 2 I/O8 I/O9 I/O10 I/O11 I/O12 I/O13 I/O14 I/O15 8 BIT AD1 WRITE PULSE AD2 READ PULSE SCL SMBus CONTROL INPUT FILTER SDA 8 BIT N WRITE PULSE READ PULSE V+ INT POWER-ON RESET MAX7318 GND Figure 1.
PAGE 7
2-Wire-Interfaced, 16-Bit, I/O Port Expander with Interrupt and Hot-Insertion Protection MAX7318 SDA S P START CONDITION STOP CONDITION SCL Figure 3. START and STOP Conditions SDA SCL DATA LINE STABLE; DATA VALID CHANGE OF DATA ALLOWED Figure 4. Bit Transfer START CONDITION CLOCK PULSE FOR ACKNOWLEDGMENT SCL 1 2 8 9 SDA BY TRANSMITTER S SDA BY RECEIVER Figure 5.
PAGE 8
MAX7318 2-Wire-Interfaced, 16-Bit, I/O Port Expander with Interrupt and Hot-Insertion Protection generates the acknowledge bit since the MAX7318 is the recipient. When the MAX7318 is transmitting to the master, the master generates the acknowledge bit. Slave address pins AD2, AD1, and AD0 choose 1 of 64 slave ID addresses (Table 7). Slave Address The command byte is the first byte to follow the 8-bit device slave address during a write transmission (Table 1, Figure 7).
PAGE 9
2-Wire-Interfaced, 16-Bit, I/O Port Expander with Interrupt and Hot-Insertion Protection Reading Port Registers To read the device data, the bus master must first send the MAX7318 address with the R/W bit set to zero, followed by the command byte, which determines which register is accessed. After a restart, the bus master must then send the MAX7318 address with the R/W bit set to 1. Data from the register defined by the command byte is then sent from the MAX7318 to the master (Figures 8, 9).
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MAX7318 2-Wire-Interfaced, 16-Bit, I/O Port Expander with Interrupt and Hot-Insertion Protection Input/Output Port Data is clocked into a register on the falling edge of the acknowledge clock pulse. After reading the first byte, additional bytes may be read and reflect the content in the other register in the pair. For example, if input port 1 is read, the next byte read is input port 2.
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2-Wire-Interfaced, 16-Bit, I/O Port Expander with Interrupt and Hot-Insertion Protection MAX7318 Table 2. Registers 0x00, 0x01—Input Port Registers BIT I7 I6 I5 I4 I3 I2 I1 I0 I15 I14 I13 I12 I11 I10 I9 I8 Table 3. Registers 0x02, 0x03—Output Port Registers BIT Power-up default O7 O6 O5 O4 O3 O2 O1 O0 O15 O14 O13 O12 O11 O10 O9 O8 1 1 1 1 1 1 1 1 Table 4.
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MAX7318 2-Wire-Interfaced, 16-Bit, I/O Port Expander with Interrupt and Hot-Insertion Protection Table 6.
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2-Wire-Interfaced, 16-Bit, I/O Port Expander with Interrupt and Hot-Insertion Protection AD2 AD1 AD0 A6 A5 A4 A3 A2 A1 A0 ADDRESS (hex) SCL SCL GND 1 0 1 0 0 0 0 0xA0 SCL SCL V+ 1 0 1 0 0 0 1 0xA2 SCL SDA GND 1 0 1 0 0 1 0 0xA4 SCL SDA V+ 1 0 1 0 0 1 1 0xA6 SDA SCL GND 1 0 1 0 1 0 0 0xA8 SDA SCL V+ 1 0 1 0 1 0 1 0xAA SDA SDA GND 1 0 1 0 1 1 0 0xAC SDA SDA V+ 1 0 1 0 1 1 1 0xAE SCL SCL SCL 1 0 1 1 0 0
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Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) INCHES N E DIM A A1 B C e E H L H MAX MIN 0.104 0.093 0.012 0.004 0.019 0.014 0.013 0.009 0.050 0.299 0.291 0.394 0.419 0.050 0.016 SOICW.EPS MAX7318 2-Wire-Interfaced, 16-Bit, I/O Port Expander with Interrupt and Hot-Insertion Protection MILLIMETERS MIN 2.35 0.10 0.35 0.23 MAX 2.65 0.30 0.49 0.32 1.27 7.40 7.
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2-Wire-Interfaced, 16-Bit, I/O Port Expander with Interrupt and Hot-Insertion Protection SSOP.EPS 2 1 INCHES E H MILLIMETERS DIM MIN MAX MIN MAX A 0.068 0.078 1.73 1.99 A1 0.002 0.008 0.05 0.21 B 0.010 0.015 0.25 0.38 C 0.09 0.20 0.004 0.008 SEE VARIATIONS D E e 0.205 0.212 0.0256 BSC 5.20 INCHES D D D D D 5.38 MILLIMETERS MIN MAX MIN MAX 0.239 0.239 0.278 0.249 0.249 0.289 6.07 6.07 7.07 6.33 6.33 7.33 0.317 0.397 0.328 0.407 8.07 10.07 8.33 10.
PAGE 16
Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) TSSOP4.40mm.EPS MAX7318 2-Wire-Interfaced, 16-Bit, I/O Port Expander with Interrupt and Hot-Insertion Protection PACKAGE OUTLINE, TSSOP 4.
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2-Wire-Interfaced, 16-Bit, I/O Port Expander with Interrupt and Hot-Insertion Protection 24L QFN THIN.EPS ______________________________________________________________________________________ 17 MAX7318 Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.
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MAX7318 2-Wire-Interfaced, 16-Bit, I/O Port Expander with Interrupt and Hot-Insertion Protection Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.
PAGE 19
2-Wire-Interfaced, 16-Bit, I/O Port Expander with Interrupt and Hot-Insertion Protection REVISION NUMBER REVISION DATE 0 8/04 Initial release — 1 — — — 2 — — — 3 12/07 DESCRIPTION Corrected error in General Description; various style edits; updated TSSOP and TQFN package outlines. PAGES CHANGED 1, 15, 16 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.