MAX7320 Datasheet, PDF (1/14 Pages) Maxim Integrated Products – I2C Port Expander with Eight Push-Pull Outputs

19-3879; Rev 0; 10/05
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I²C Port Expander with Eight Push-Pull Outputs
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 I²C^† communication to or from the
MAX7320.
The MAX7320 uses two address inputs with four-level
logic to allow 16 I²C 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).
Cell Phones/PDAs
Satellite Radios
Notebooks
Applications
Automotive
RAID
Servers
Features
♦ 400kHz, +5.5V-Tolerant I²C 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
Ordering Information
PART
TEMP PIN-
RANGE PACKAGE
MAX7320AEE+
-40°C to
+125°C
16 QSOP
MAX7320ATE+
-40°C to
+125°C
16 TQFN
3mm x 3mm
x 0.8mm
+Denotes lead-free package.
TOP PKG
MARK CODE
— E16-4
ADB T1633-4
Pin Configurations, Typical Application Circuit, and
Functional Diagram appear at end of data sheet.
PART
INPUTS
MAX7319
8
MAX7320
—
MAX7321
Up to 8
MAX7322
4
MAX7323
Up to 4
MAX7328*
MAX7329**
Up to 8
*Second source to PCF8574.
**Second source to PCF8574A.
†_Pa
lC
S.
INTERRUPT MASK
Yes
—
—
Yes
—
—
—
OPEN-DRAIN OUTPUTS
—
—
Up to 8
—
Up to 4
Up to 8
Selector Guide
PUSH-PULL OUTPUTS
—
8
—
4
4
—
—
________________________________________________________________ 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.