The MAX7322 2-wire serial-interfaced peripheral features
four push-pull outputs and four input ports with selectable
internal pullups. Input ports are overvoltage protected to
+6V and feature transition detection with interrupt output.
The four input ports are continuously monitored for state
changes (transition detection). The interrupt is latched,
allowing detection of transient changes. Any combination
of inputs can be selected using the interrupt mask to
assert the open-drain active-low INT output. When the MAX7322 is
subsequently accessed through the serial interface, any
pending interrupt is cleared.
The four push-pull outputs are rated to sink 20mA, and
are capable of driving LEDs.
The active-low RST input clears the serial interface, terminating any
I²C communication to or from the MAX7322.
The MAX7322 uses two address inputs with four-level
logic to allow 16 I²C slave addresses. The slave address
also sets the power-up default logic state for the four output
ports, and enables or disables internal 40kΩ pullups for the input ports.
The MAX7322 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 in the full datasheet).
The MAX7322 is available in 16-pin QSOP and TQFN
packages, and is specified over the -40°C to +125°C
automotive temperature range.
Key Features
Applications/Uses
400kHz I²C Serial Interface
+1.71V to +5.5V Operation Voltage
4 Push-Pull Output Ports Rated at 20mA Sink Current
4 Input Ports with Maskable, Latching Transition Detection
Input Ports are Overvoltage Protected to +6V
Transient Changes are Latched, Allowing Detection Between Read Operations
Active-Low INT Output Alerts Change on Any Selection of Inputs
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
Devices:
1-8
of
8
MAX7322
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
Temp
RoHS/Lead-Free? Materials Analysis
MAX7322AEE+T
-40°C to +125°C
See data sheet
MAX7322AEE+
QSOP;16 pin;
Dwg: 21-0055H (PDF)
Use pkgcode/variation: E16+4*
MAX7322 I²C Port Expander with 4 Push-Pull Outputs and 4 Inputs MAX7327 I²C Port Expander with 12 Push-Pull Outputs and 4 Open-Drain I/Os MAX7319 I²C Port Expander with Eight Inputs and Maskable Transition Detection MAX7326 I²C Port Expander with 12 Push-Pull Outputs and Four Inputs MAX7320 I²C Port Expander with Eight Push-Pull Outputs MAX7321 I²C Port Expander with 8 Open-Drain I/Os MAX7324 I²C Port Expander with Eight Push-Pull Outputs and Eight Inputs MAX7323 I²C Port Expander with 4 Push-Pull Outputs and 4 Open-Drain I/Os MAX7328, MAX7329 I²C Port Expanders with Eight I/O Ports
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