19-5949; Rev 1; 3/12
MAX7304
2
I C-Interfaced 16-Port,
Level-Translating GPIO and LED Driver
with High Level of Integrated ESD Protection
General Description
Features
The MAX7304 consists of 16 port GPIOs, with 12 push-
pull GPIOs and four open-drain GPIOs configurable as
PWM-controlled LED drivers. The device supports a
1.62V to 3.6V separate power supply for level translation.
An address-select input (AD0) allows up to four unique
slave addresses for the device.
S Four LED Driver Pins on PORT15–PORT12
S Integrated High-ESD Protection
8kV IEC 61000-4-2 Contact Discharge
15kV IEC 61000-4-2 ꢁir-ꢂaꢃ Discharge
S 5V Tolerant, Oꢃen-Drain I/O Ports Caꢃable of
Constant-Current LED Drive
Each GPIO can be programmed to one of the two
externally applied logic voltage levels. PORT15–PORT12
can also be configured as LED drivers that feature
constant-current sinks and PWM intensity control with the
internal oscillator. The maximum constant-current level for
each open-drain LED port is 20mA. The intensity of the
LED on each open-drain port can be individually adjusted
through a 256-step PWM control. The port also features
LED fading.
S 256-Steꢃ PWM Individual LED Intensity-Control
ꢁccuracy
S Individual LED Blink Rates and Common LED
Fade-In/Out Rates from 256ms to 4096ms
S User-Configurable Debounce Time (1ms to 32ms)
S Configurable Edge-Triggered Port Interruꢃt (INT)
S 1.62V to 3.6V Oꢃerating Suꢃꢃly Voltage
The same index rows and columns in the device can be
used as a direct logic-level translator.
S Individually Programmable ꢂPIOs to Two Logic
Levels
The device is offered in a 24-pin (3.5mm x 3.5mm) TQFN
package with an exposed pad, and a small 25-bump
(2.159mm x 2.159mm) wafer-level package (WLP) for
cell phones, pocket PCs, and other portable consumer
electronic applications.
S 8-Channel Individual Programmable Level
Translators
S Suꢃꢃorts Hot Insertion
S 400kbꢃs, 5.5V Tolerant I2C Serial Interface with
Selectable Bus Timeout
The device operates over the -40NC to +85NC extended
temperature range.
Ordering Information appears at end of data sheet.
Applications
For related parts and recommended products to use with this part,
Cell Phones
refer to www.maxim-ic.com/MAX7304.related.
Notebooks
PDAs
Typical Operating Circuit
Handheld Games
Portable Consumer Electronics
+1.8V +2.6V
V
V
LA
CC
14
PORT0
PORT1
GPIO
+5V
MAX7304
INT
MCU
SDA
SCL
PORT13
PORT14
PORT15
AD0
GND
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1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.