Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsInterface ICsInterface IC - I/O extensions POR I²C 400 kHz TQFN 16 EP

General Description

The MAX7320 2-wire serial-interfaced peripheral fea-

tures eight push-pull outputs with selectable power-up

logic states.

The +5.5V tolerant RST input clears the serial interface,

terminating any I

†

communication to or from the

MAX7320.

The MAX7320 uses two address inputs with four-level

logic to allow 16 I

C slave addresses. The slave

address also determines the power-up state level for

the outputs in groups of four ports.

The MAX7320 supports hot insertion. The serial inter-

face SDA, SCL, AD0, AD2, and RST remain high

impedance in power-down (V+ = 0V) with up to +6V

asserted on them.

The MAX7320 is one device in a family of pin-compatible

port expanders with a choice of input ports, open-drain

I/O ports, and push-pull output ports (see Table 1).

The MAX7320 is available in 16-pin QSOP and 16-pin

TQFN packages, and is specified over the automotive

temperature range (-40°C to +125°C).

Applications

Features

♦ 400kHz, +5.5V-Tolerant I

C Serial Interface

♦ +1.71V to +5.5V Operating Voltage

♦ Eight Push-Pull Output Ports with Selectable

Power-Up Logic States

♦ RST Clears the Serial Interface, Terminating Any

Serial Transaction to or from the MAX7320

♦ AD0 and AD2 Inputs Select from 16 Slave

Addresses

♦ Low 0.6µA (typ) Standby Current

♦ -40°C to +125°C Temperature Range

MAX7320

C Port Expander with Eight Push-Pull Outputs

________________________________________________________________ Maxim Integrated Products 1

19-3879; Rev 0; 10/05

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.

EVALUATION KIT

AVAILABLE

Ordering Information

PART

TEMP

RANGE

PIN-

PACKAGE

TOP

MARK

PKG

CODE

MAX7320AEE+

-40°C to

+125°C

16 QSOP — E16-4

MAX7320ATE+

-40°C to

+125°C

16 TQFN

3mm x 3mm

x 0.8mm

ADB T1633-4

Pin Configurations, Typical Application Circuit, and

Functional Diagram appear at end of data sheet.

+Denotes lead-free package.

Selector Guide

PART INPUTS INTERRUPT MASK OPEN-DRAIN OUTPUTS PUSH-PULL OUTPUTS

MAX7319 8 Yes — —

MAX7320 — — — 8

MAX7321 Up to 8 — Up to 8 —

MAX7322 4 Yes — 4

MAX7323 Up to 4 — Up to 4 4

MAX7328* — —

MAX7329**

Up to 8

—

Up to 8

—

*Second source to PCF8574.

**Second source to PCF8574A.

†

Cell Phones/PDAs

Satellite Radios

Notebooks

Automotive

RAID

Servers

Summary of content (14 pages)

PAGE 1
KIT ATION EVALU E L B AVAILA 19-3879; Rev 0; 10/05 I2C Port Expander with Eight Push-Pull Outputs The MAX7320 2-wire serial-interfaced peripheral features eight push-pull outputs with selectable power-up logic states. The +5.5V tolerant RST input clears the serial interface, terminating any I 2 C † communication to or from the MAX7320. The MAX7320 uses two address inputs with four-level logic to allow 16 I 2 C slave addresses.
PAGE 2
MAX7320 I2C Port Expander with Eight Push-Pull Outputs ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) Supply Voltage V+....................................................-0.3V to +6V SCL, SDA, AD0, AD2, RST .......................................-0.3V to +6V O0–07...............................................................0.3V to V+ + 0.3V 00–07 Output Current .......................................................±25mA SDA Input Current......................................................
PAGE 3
I2C Port Expander with Eight Push-Pull Outputs MAX7320 PORT AND TIMING CHARACTERISTICS (V+ = +1.71V 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 Port Output Data Valid SYMBOL tPPV CONDITIONS MIN TYP CL ≤ 100pF MAX UNITS 4 µs TIMING CHARACTERISTICS (V+ = +1.71V to +5.5V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at V+ = +3.3V, TA = +25°C.
PAGE 4
Typical Operating Characteristics (TA = +25°C, unless otherwise noted.) STANDBY CURRENT vs. TEMPERATURE 1.4 1.2 V+ = +5.0V 1.0 V+ = +3.3V V+ = +2.5V 0.8 0.6 0.4 V+ = +1.71V MAX7320 toc02 40 V+ = +3.3V 30 20 V+ = +2.5V 10 0.2 V+ = +1.71V 0 0 -40 -25 -10 5 20 35 50 65 80 95 110 125 -40 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE (°C) TEMPERATURE (°C) OUTPUT VOLTAGE LOW vs. TEMPERATURE OUTPUT VOLTAGE HIGH vs. TEMPERATURE 6 MAX7320 toc03 0.50 0.40 0.35 V+ = +5.0V ISINK = 5mA 0.30 0.
PAGE 5
I2C Port Expander with Eight Push-Pull Outputs MAX7319–MAX7329 Family Comparison The MAX7319–MAX7323 family consists of five pincompatible, eight-port expanders. Each version is optimized for different applications. The MAX7328 and MAX7329 are second sources to the PCF8574 and PCF8574A. The MAX7324–MAX7327 family consists of four pincompatible, 16-port expanders that integrate the functions of the MAX7320 and one of either the MAX7319, MAX7321, MAX7322, or MAX7323.
PAGE 6
MAX7320 I2C Port Expander with Eight Push-Pull Outputs Table 1. MAX7319–MAX7329 Family Comparison (continued) PART I2C SLAVE INPUTS ADDRESS INPUT INTERRUPT MASK OPENDRAIN OUTPUTS PUSHPULL OUTPUTS MAX7323 110xxxx Up to 4 — Up to 4 4 MAX7328 MAX7329 0100xxx 0111xxx Up to 8 — Up to 8 — APPLICATION Four I/O, four output-only versions: Four open-drain I/O ports with latching transition detection interrupt and selectable pullups. Four push-pull outputs with selectable power-up default levels.
PAGE 7
I2C Port Expander with Eight Push-Pull Outputs PIN CONNECTION DEVICE ADDRESS OUTPUTS POWER-UP DEFAULT AD2 AD0 A6 A5 A4 A3 A2 A1 A0 O7 O6 O5 O4 O3 O2 O1 O0 SCL GND 1 0 1 0 0 0 0 1 1 1 1 0 0 0 0 SCL V+ 1 0 1 0 0 0 1 1 1 1 1 1 1 1 1 SCL SCL 1 0 1 0 0 1 0 1 1 1 1 1 1 1 1 SCL SDA 1 0 1 0 0 1 1 1 1 1 1 1 1 1 1 SDA GND 1 0 1 0 1 0 0 1 1 1 1 0 0 0 0 SDA V+ 1 0 1 0 1 0 1 1 1 1 1 1 1 1 1 SDA SCL
PAGE 8
MAX7320 I2C Port Expander with Eight Push-Pull Outputs SDA tLOW tBUF tSU,STA tSU,DAT tHD,STA tSU,STO tHD,DAT tHIGH SCL tHD,STA tR tF tVD,DAT START CONDITION REPEATED START CONDITION STOP CONDITION START CONDITION Figure 1. 2-Wire Serial-Interface Timing Details logic-high power-up state, and a logic-low selects a logic-low power-up state for each set of four ports (see Table 3).
PAGE 9
I2C Port Expander with Eight Push-Pull Outputs Slave Address The MAX7320 has a 7-bit slave address (Figure 5). The 8th bit following the 7-bit slave address is the R/W bit. It is low for a write command, and high for a read command. The 1st (A6), 2nd (A5), and 3rd (A4) bits of the MAX7320 slave address are always 1, 0, and 1. Connect AD0 and AD2 to GND, V+, SDA, or SCL to select the slave address bits A3, A2, A1, and A0.
PAGE 10
MAX7320 I2C Port Expander with Eight Push-Pull Outputs SDA 1 0 1 A3 A2 A1 A0 R/W ACK LSB MSB SCL Figure 5. Slave Address PORT SNAPSHOT DATA S 1 0 1 MAX7320 SLAVE ADDRESS 1 A R/W O7 O6 O5 O4 O3 DATA 1 O2 O1 O0 D7 D6 D5 D4 D2 D1 D0 PORT SNAPSHOT TAKEN D3 N P ACKNOWLEDGE FROM MASTER PORT SNAPSHOT TAKEN SCL S = START CONDITION P = STOP CONDITION SHADED = SLAVE TRANSMISSION N = NOT ACKNOWLEDGE Figure 6.
PAGE 11
I2C Port Expander with Eight Push-Pull Outputs V+ AD0 AD2 SCL SDA RST INPUT FILTER I2C CONTROL OUTPUT PORTS O7 O6 O5 O4 O3 O2 O1 O0 POWERON RESET MAX7320 GND Applications Information V+ Hot Insertion SDA, SCL, AD0, AD2, and RST are overvoltage protected to +6V independent of V+. This allows the MAX7320 to be operated from a lower supply voltage, such as +3.3V, while the I2C interface is driven from a higher logic level, such as +5V.
PAGE 12
Compatibility with MAX6965, MAX7315, and MAX7316 Table 4. MAX7320, MAX6965, MAX7315, and MAX7316 Pin Compatibility N.C. O7 O6 12 11 10 9 SDA 13 V+ 14 MAX7320 AD0 15 *EP RST 16 1 2 3 4 O1 O2 PIN FUNCTION O0 PIN-PACKAGE TOP VIEW SCL The MAX7320 is subset pin compatible with the MAX6965, MAX7315, and MAX7316. The pin differences are shown in Table 4. The MAX7320 is not software compatible with MAX6965, MAX7315, or MAX7316.
PAGE 13
I2C Port Expander with Eight Push-Pull Outputs 12x16L QFN THIN.EPS (NE - 1) X e E MARKING E/2 D2/2 (ND - 1) X e AAAA D/2 e CL D D2 k CL b 0.10 M C A B E2/2 L E2 0.10 C C L C L 0.08 C A A2 A1 L L e e PACKAGE OUTLINE 8, 12, 16L THIN QFN, 3x3x0.8mm 21-0136 PKG 8L 3x3 12L 3x3 16L 3x3 REF. MIN. NOM. MAX. MIN. NOM. MAX. MIN. NOM. MAX. A 0.70 0.75 0.80 0.70 0.75 0.80 0.70 0.75 0.80 b 0.25 0.30 0.35 0.20 0.25 0.30 0.20 0.25 0.30 D 2.90 3.00 3.10 2.90 3.
PAGE 14
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.) QSOP.EPS MAX7320 I2C Port Expander with Eight Push-Pull Outputs Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.