MAX7311AAG+ Datasheet MAX7311ATG+T, MAX7311AUG+, MAX7311ATG+ | P1-P3

General Description

The MAX7311 2-wire-interfaced expander provides 16-bit

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

and I

C™ applications. The MAX7311 consists of input

port registers, output port registers, polarity inversion reg-

isters, configuration registers, a bus timeout register, and

an I

C-compatible serial interface logic compatible with

SMBus. The system master can invert the MAX7311 input

data by writing to the active-high polarity inversion regis-

ter. The system master can enable or disable bus timeout

by writing to the bus timeout 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 MAX7311 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 MAX7311 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 I/Os without pullup resistors,

refer to the MAX7312 data sheet.

Applications

Servers

RAID Systems

Industrial Control

Medical Equipment

PLCs

Instrumentation and Test Measurement

Features

♦ 400kbps I

C-Compatible Serial Interface

♦ 2V to 5.5V Operation

♦ 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)

♦ Bus Timeout for Lock-Up-Free Operation

♦ Noise Filter on SCL / SDA Inputs

♦ 64 Slave ID Addresses Available

♦ Low Standby Current (2.9µA typ)

♦ Polarity Inversion

♦ 4mm

✕ 4mm, 0.8mm Thin QFN Package

♦ -40°C to +125°C Operation

MAX7311

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

with Interrupt and Hot-Insertion Protection

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

19-2747; Rev 4; 4/05

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.

SMBus is a trademark of Intel Corp.

EVALUATION KIT

AVAILABLE

PART TEMP RANGE PIN-PACKAGE

PKG

CODE

MAX7311AWG -40°C to +125°C 24 Wide SO —

MAX7311AAG -40°C to +125°C 24 SSOP —

MAX7311ATG -40°C to +125°C

24 Thin QFN

(4mm

✕ 4mm)

T2444-4

MAX7311AUG -40°C to +125°C 24 TSSOP —

TOP VIEW

SDA

SCL

AD0I/O0

AD2

AD1

I/O15

I/O14

I/O13

I/O12I/O4

I/O3

I/O2

I/O1

I/O11

I/O10

I/O9

I/O8GND

I/O7

I/O6

I/O5

TSSOP/SSOP/SO

MAX7311

INT

THIN QFN

MAX7311ATG

12 3456

18 17 16 15 14 13

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

MAX7311

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

with Interrupt and Hot-Insertion Protection

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

= 2V to 5.5V, T

= -40°C to +125°C, unless otherwise noted. Typical values are at V

= 3.3V, T

= +25°C.) (Note 1)

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.

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 ...................................................-250mA

DC Input Current on I/O0–I/O15 .......................................±20mA

DC Output Current on I/O0–I/O15 ....................................±80mA

Continuous Power Dissipation (T

= +70°C)

24-Pin Wide SO (derate 11.8mW/°C above +70°C) ....941mW

24-Pin SSOP (derate 8.0mW/°C above +70°C) ...........640mW

24-Pin TSSOP (derate 12.2mW/°C above +70°C) .......975mW

24-Pin Thin QFN (derate 20.8mW/°C above +70°C) .1668mW

Operating Temperature Range .........................-40°C to +125°C

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

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

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

PARAMETER SYM B O L CONDITIONS MIN TYP MAX UNITS

Supply Voltage V

2 5.5 V

= 2V 23 35

= 3.3V 43 60Supply Current I

All I/Os unloaded,

SCL

= 400kHz

= 5.5V 80 120

µA

= 2V 2.3 11

= 3.3V 2.9 12Standby Current I

STBY

All I/Os unloaded,

SCL

= 0

= 5.5V 3.8 15.5

µA

Power-On Reset Voltage V

POR

1.4 1.7 V

SCL, SDA

Input Voltage Low V

0.3 ✕ V

Input Voltage High

0.7 ✕ V

Low-Level Output Voltage V

SINK

= 6mA 0.4 V

Leakage Current I

-1 +1 µA

Input Capacitance 10 pF

I/O_

Input Voltage Low V

0.8 V

Input Voltage High V

1.8 V

Input Leakage Current

= -40°C to +85°C; includes internal

pullup current, V

= V

1µA

Internal Pullup Current T

= -40°C to +85°C, V

= 0 34 100 µA

= 2V, V

= 0.5V 8.5 17

= 3.3V, V

= 0.5V 17 32

Low-Level Output Current I

SINK

= 5V, V

= 0.5V 43

= 3.3V, V

= 2.4V 29 41

High Output Current I

SOURCE

= 5V, V

= 4.5V 31

AD0, AD1, AD2

Input Voltage Low V

0.3 ✕ V

Input Voltage High V

0.7 ✕ V

MAX7311

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

with Interrupt and Hot-Insertion Protection

_______________________________________________________________________________________ 3

Note 1: All parameters are 100% production tested at T

= +25°C. Specifications over temperature are guaranteed by design.

Note 2: Minimum SCL clock frequency is limited by the MAX7311 bus timeout feature, which resets the serial bus interface if either

SDA or SCL is held low for a minimum of 25ms. Disable bus timeout feature for DC operation.

Note 3: A master device must internally provide a hold time of at least 300ns for the SDA signal (referred to the V

of the SCL

signal) in order to bridge the undefined region SCL’s falling edge.

Note 4: C

= total capacitance of one bus line in pF.

Note 5: The maximum t

for the SDA and SCL bus lines is specified at 300ns. The maximum fall time for the SDA output stage t

specified at 250ns. This allows series protection resistors to be connected between the SDA and SCL pins and the

SDA/SCL bus lines without exceeding the maximum specified t

Note 6: Input filters on the SDA and SCL inputs suppress noise spikes less than 50ns.

DC ELECTRICAL CHARACTERISTICS (continued)

= 2V to 5.5V, T

= -40°C to +125°C, unless otherwise noted. Typical values are at V

= 3.3V, T

= +25°C.) (Note 1)

PARAMETER SYM B O L CONDITIONS MIN TYP MAX UNITS

Leakage Current -1 +1 µA

Input Capacitance 4pF

INT

Low-Level Output Current I

= 0.4V 6 mA

AC ELECTRICAL CHARACTERISTICS

= 2V to 5.5V, T

= -40°C to +125°C, unless otherwise noted.) (Note 1)

PARAMETER SYM B O L CONDITIONS MIN TYP MAX UNITS

SCL Clock Frequency f

SCL

(Note 2) 400 kHz

Bus Timeout t

TIMEOUT

29 61 ms

Bus Free Time Between STOP

and START Conditions

BUF

Figure 2 1.3 µs

Hold Time (Repeated) START

Condition

STA

Figure 2 0.6 µs

Repeated START Condition

Setup Time

SU,STA

Figure 2 0.6 µs

STOP Condition Setup Time t

STO

Figure 2 0.6 µs

Data Hold Time t

DAT

Figure 2 (Note 3) 0.9 µs

Data Setup Time t

DAT

Figure 2 100 ns

SCL Low Period t

LOW

Figure 2 1.3 µs

SCL High Period t

HIGH

Figure 2 0.7 µs

V+ < 3.3V 500

SDA Fall Time t

Figure 2 (Notes 4, 5)

V+ ≥ 3.3V 250

Pulse Width of Spike Suppressed t

(Note 6) 50 ns

PORT TIMING

Output Data Valid t

Figure 7 3 µs

Input Data Setup Time 27 µs

Input Data Hold Time 0µs

INTERRUPT TIMING

Interrupt Valid t

Figure 9 30.5 µs

Interrupt Reset t

Figure 9 2 µs

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P16

MAX7311AAG+

Mfr. #:

Buy MAX7311AAG+

Manufacturer:

Maxim Integrated

Description:

Interface - I/O Expanders 16-Bit I/O Port Expander

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MAX7311AAG+

MAX7311AAG+

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