MAXIM MAX7311 User Manual

19-2747; Rev 4; 4/05

EVALUATION KIT

AVAILABLE

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

with Interrupt and Hot-Insertion Protection

General Description

The MAX7311 2-wire-interfaced expander provides 16-bit parallel input/output (I/O) port expansion for SMBus™ and I2C™ applications. The MAX7311 consists of input port registers, output port registers, polarity inversion registers, configuration registers, a bus timeout register, and an I2C-compatible serial interface logic compatible with SMBus. The system master can invert the MAX7311 input data by writing to the active-high polarity inversion register. 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

Pin Configurations

TOP VIEW

INT

AD1

AD2

I/O1

I/O2

I/O3

I/O5

I/O6

I/O7

TSSOP/SSOP/SO

MAX7311

AD0

SDA

SCL

AD0I/O0

I/O15

I/O14

I/O13

I/O12I/O4

I/O11

I/O10

I/O9

I/O8GND

18 17 16 15 14 13

SCL

SDA

V+

INT

AD1

AD2

12 3456

I/O0

I/O14

I/O15

MAX7311ATG

I/O1

I/O2

THIN QFN

I/O13

I/O3

I/O12

I/O4

I/O11

I/O5

I/O10

I/O9

I/O8

GND

I/O7

I/O6

Features

♦ 400kbps I2C-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

Ordering Information

PART TEMP RANGE PIN-PACKAGE

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)

MAX7311AUG -40°C to +125°C 24 TSSOP —

SMBus is a trademark of Intel Corp.

c. oa l

PKG

CODE

T2444-4

MAX7311

________________________________________________________________ Maxim Integrated Products 1

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.

MAX7311

2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion Protection

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(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)

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.

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 ...................................................-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

Power-On Reset Voltage V

SCL, SDA

Input Voltage Low V

Input Voltage High

Low-Level Output Voltage V

Leakage Current I

Input Capacitance 10 pF

I/O_

Input Voltage Low V

Input Voltage High V

Input Leakage Current

Internal Pullup Current TA = -40°C to +85°C, VIO = 0 34 100 µA

Low-Level Output Current I

High Output Current I

AD0, AD1, AD2

Input Voltage Low V

Input Voltage High V

STBY

POR

SINK

SOURCE

All I/Os unloaded,

= 400kHz

SCL

All I/Os unloaded,

= 0

SCL

= 6mA 0.4 V

SINK

= -40°C to +85°C; includes internal

pullup current, V

V+ = 2V, VOL = 0.5V 8.5 17

V+ = 3.3V, VOL = 0.5V 17 32

V+ = 5V, VOL = 0.5V 43

V+ = 3.3V, VOH = 2.4V 29 41

V+ = 5V, VOH = 4.5V 31

= V

V+ = 2V 23 35

V+ = 3.3V 43 60Supply Current I

= 5.5V 80 120

V+ = 2V 2.3 11

V+ = 3.3V 2.9 12Standby Current I

= 5.5V 3.8 15.5

2 5.5 V

1.4 1.7 V

0.3 ✕ V

0.7 ✕ V

-1 +1 µA

0.8 V

1.8 V

1µA

0.3 ✕ V

0.7 ✕ V

µA

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 TA= +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 tFis 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)

(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)

AC ELECTRICAL CHARACTERISTICS

(V+= 2V to 5.5V, TA= -40°C to +125°C, unless otherwise noted.) (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

PARAMETER SYM B O L CONDITIONS MIN TYP MAX UNITS

SCL Clock Frequency f

Bus Timeout t

Bus Free Time Between STOP and START Conditions

Hold Time (Repeated) START Condition

Repeated START Condition Setup Time

STOP Condition Setup Time t

Data Hold Time t

Data Setup Time t

SCL Low Period t

SCL High Period t

SDA Fall Time t

Pulse Width of Spike Suppressed t

PORT TIMING

Output Data Valid t

Input Data Setup Time 27 µs

Input Data Hold Time 0µs

INTERRUPT TIMING

Interrupt Valid t

Interrupt Reset t

SCL

TIMEOUT

BUF

HD,STA

SU,STA

SU,STO

HD,DAT

SU,DAT

LOW

HIGH

(Note 2) 400 kHz

29 61 ms

Figure 2 1.3 µs

Figure 2 0.6 µs

Figure 2 (Note 3) 0.9 µs

Figure 2 100 ns

Figure 2 1.3 µs

Figure 2 0.7 µs

Figure 2 (Notes 4, 5)

(Note 6) 50 ns

Figure 7 3 µs

Figure 9 30.5 µs

Figure 9 2 µs

V+ < 3.3V 500

V+ ≥ 3.3V 250

MAX7311

2-Wire-Interfaced 16-Bit I/O Port Expander with Interrupt and Hot-Insertion Protection

4 _______________________________________________________________________________________

Typical Operating Characteristics

(TA = +25°C, unless otherwise noted.)

SUPPLY CURRENT

vs. TEMPERATURE

MAX7311 toc01

TEMPERATURE (°C)

SUPPLY CURRENT (μA)

1007525 500-25

100

-50 125

SCL

= 400kHz

ALL I/Os UNLOADED

V+ = 3.3V

V+ = 5V

V+ = 2V

STANDBY SUPPLY CURRENT

vs. TEMPERATURE

MAX7311 toc02

TEMPERATURE (°C)

SUPPLY CURRENT (μA)

1007525 500-25

-50 125

SCL = V

ALL I/Os UNLOADED

V+ = 3.3V

V+ = 5V

V+ = 2V

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

MAX7311 toc03

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (μA)

5.04.53.5 4.03.02.5

100

2.0 5.5

SCL

= 400kHz

ALL I/Os UNLOADED

I/O SINK CURRENT

vs. OUTPUT LOW VOLTAGE

MAX7311 toc04

VOL (V)

SINK

(mA)

0.50.40.30.20.1

0 0.6

V+ = 2V

TA = +125°C

TA = +25°C

TA = -40°C

I/O SINK CURRENT

vs. OUTPUT LOW VOLTAGE

MAX7311 toc05

VOL (V)

SINK

(mA)

0.50.40.30.20.1

0 0.6

V+ = 3.3V

TA = +125°C

TA = -40°C

TA = +25°C

I/O SINK CURRENT

vs. OUTPUT LOW VOLTAGE

MAX7311 toc06

VOL (V)

SINK

(mA)

0.40.30.20.1

0 0.5

V+ = 5V

TA = +125°C

TA = -40°C

TA = +25°C

I/O OUTPUT LOW VOLTAGE

vs. TEMPERATURE

MAX7311 toc07

TEMPERATURE (°C)

(mV)

10075-25 0 25 50

100

150

200

250

300

350

400

-50 125

V+ = 5V, I

SINK

= 10mA

V+ = 2V, I

SINK

= 10mA

V+ = 2V, I

SINK

= 1mA

V+ = 5V, I

SINK

= 1mA

I/O SOURCE CURRENT

vs. OUTPUT HIGH VOLTAGE

MAX7311 toc08

V+ - VOH (V)

SOURCE

(mA)

0.60.50.40.30.20.1

0 0.7

V+ = 2V

TA = +125°C

TA = +25°C

TA = -40°C

I/O SOURCE CURRENT

vs. OUTPUT HIGH VOLTAGE

MAX7311 toc09

V+ - VOH (V)

SOURCE

(mA)

0.60.50.3 0.40.20.1

0 0.7

V+ = 3.3V

TA = +125°C

TA = +25°C

TA = -40°C

MAX7311

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

with Interrupt and Hot-Insertion Protection

_______________________________________________________________________________________ 5

Pin Description

Typical Operating Characteristics (continued)

(TA = +25°C, unless otherwise noted.)

I/O SOURCE CURRENT

vs. OUTPUT HIGH VOLTAGE

MAX7311 toc10

V+ - VOH (V)

SOURCE

(mA)

0.60.50.3 0.40.20.1

V+ = 5V

TA = +125°C

TA = +25°C

TA = -40°C

I/O HIGH VOLTAGE vs. TEMPERATURE

MAX7311 toc11

TEMPERATURE (°C)

- V

(V)

1007550250-25

100

200

300

400

500

-50 125

V+ = 5V, I

SOURCE

= 10mA

V+ = 2V, I

SOURCE

= 10mA

TSSOP/

SSOP/SO

122INT Interrupt Output (Open Drain)

2 23 AD1 Address Input 1

3 24 AD2 Address Input 2

4–11 1–8 I/O0–I/O7 Input/Output Port 1

12 9 GND Supply Ground

13–20 10–17 I/O8–I/O15 Input/Output Port 2

21 18 AD0 Address Input 0

22 19 SCL Serial Clock Line

23 20 SDA Serial Data Line

24 21 V

— PAD

THIN

QFN

NAME FUNCTION

Supply Voltage. Bypass with a 0.047µF capacitor to GND.

Exposed

pad

Exposed Pad on Package Underside. Connect to GND.

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