Home

MAX7325| Datasheet

By datasheet - February 2nd, 2009

MAX7325| Datasheet

Datasheet preview, take a look at Datasheets before downloading (Data Sheet is available on manufacturer site)


19-3807; Rev 0; 9/06

I2C Port Expander with 8 Push-Pull and 8 Open-Drain I/Os
General Description
The MAX7325 2-wire serial-interfaced peripheral features 16 I/O ports. Ports are divided into eight push-pull outputs and eight I/Os with selectable internal pullups and transition detection. Eight ports are push-pull outputs and eight I/Os may be used as a logic input or an opendrain output. Ports are overvoltage protected to +6V. All I/O ports configured as inputs are continuously monitored for state changes (transition detection). State changes are indicated by the INT output. The interrupt is latched, allowing detection of transient changes. When the MAX7325 is subsequently accessed through the serial interface, any pending interrupt is cleared. The open-drain outputs are rated to sink 20mA, and are capable of driving LEDs. The RST input clears the serial interface, terminating any I2C communication to or from the MAX7325. The MAX7325 uses two address inputs with four-level logic to allow 16 I 2 C slave addresses. The slave address also determines the power-up logic state for the I/O ports, and enables o
r disables internal 40k pullups in groups of four ports. The MAX7325 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 MAX7325 is available in 24-pin QSOP and TQFN packages and is specified over the -40 C to +125 C automotive temperature range. I2C

Features
400kHz Serial Interface +1.71V to +5.5V Operation 8 Push-Pull Outputs 8 Open-Drain I/O Ports, Rated to 20mA Sink Current I/O Ports are Overvoltage Protected to +6V Selectable I/O Port Power-Up Default Logic States Transient Changes are Latched, Allowing Detection Between Read Operations INT Output Alerts Change on Inputs AD0 and AD2 Inputs Select from 16 Slave Addresses Low 0.6uA (typ) Standby Current -40 C to +125 C Temperature Range

MAX7325

Ordering Information
PART MAX7325AEG+ MAX7325ATG+ TEMP RANGE PIN-PACKAGE PKG CODE E24-1 T2444-3

-40 C to +125 C 24 QSOP -40 C to +125 C 24 TQFN-EP* (4mm x 4mm)

Applications
Cell Phones SAN/NAS Servers Notebooks Satellite Radio Automotive

+Denotes lead-free package. *EP = Exposed paddle.

Selector Guide
PART MAX7324 MAX7325 MAX7326 INPUTS 8 Up to 8 4 Up to 4 INTERRUPT MASK Yes -- Yes -- OPENPUSH-PULL DRAIN OUTPUTS OUTPUTS -- Up to 8 -- Up to 4 8 8 12 12

Pin Configurations
AD0 O15 O13 O12 14 O14 O11 13 12 O10 11 O9 10 O8

TOP VIEW

18 SCL 19 SDA 20 V+ 21 INT 22 RST 23 AD2 24 + 1 P0

17

16

15

MAX7327

MAX7325
EXPOSED PADDLE 2 P1 3 P2 4 P3 5 P4 6 P5

9 8 7

GND P7 P6

Typical Application Circuit and Functional Diagram appear at end of data sheet.

TQFN (4mm x 4mm) Pin Configurations continued at end of data sheet.

________________________________________________________________ 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.


MAX7325 Datasheet maxim Download PDF

Add this permalink to your bookmarks for future download of MAX7325 datasheet

Permalink: http://datasheet.emcelettronica.com/maxim/MAX7325