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General Description

The MAX7304PMB1 peripheral module provides the

necessary hardware to interface the MAX7304 16-port

GPIO and LED driver to any system that utilizes

PmodK-compatible expansion ports configurable for

C communication. The IC features 16 GPIO ports

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. Each GPIO can be programmed to one of

the two externally applied logic voltage levels. PORT12–

PORT15 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 indi-

vidually adjusted through a 256-step PWM control. The

port also features LED fading.

Refer to the MAX7304 IC data sheet for detailed informa-

tion regarding operation of the IC.

Features

S Four LED Driver Pins on PORT12–PORT15

S 256-Step PWM Individual LED Intensity-Control

Accuracy

S Individual LED Blink Rates and Common LED

Fade-In/Out Rates

S Individually Programmable GPIOs to Two Logic

Levels

S 8-Channel Individual Programmable Level

Translators

S Configurable Edge-Triggered Port Interrupt

S Jumper-Selectable I

C Address Setting

S 6-Pin Pmod-Compatible Connector (I

S Secondary Header Allows Daisy-Chaining of

Additional Modules on I

C Bus

S Example Software Written in C for Portability

S RoHS Compliant

S Proven PCB Layout

S Fully Assembled and Tested

MAX7304PMB1 Peripheral Module

For pricing, delivery, and ordering information, please contact Maxim Direct at

1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.

19-6327; Rev 0; 5/12

Ordering Information appears at end of data sheet.

MAX7304PMB1 Peripheral Module

Pmod is a trademark of Digilent Inc.

Summary of content (8 pages)

PAGE 1
MAX7304PMB1 Peripheral Module General Description The MAX7304PMB1 peripheral module provides the necessary hardware to interface the MAX7304 16-port GPIO and LED driver to any system that utilizes PmodK-compatible expansion ports configurable for I2C communication. The IC features 16 GPIO ports 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.
PAGE 2
MAX7304PMB1 Peripheral Module Component List DESIGNATION C1, C3 QTY 2 DESCRIPTION DESIGNATION QTY DESCRIPTION JP1 1 6-pin (2 x 3) straight male header LED1–LED4 4 Red LEDs (1206) R1, R2, R3 3 150I Q5% resistors (0603) R4, R5 2 4.7kI Q5% resistors (0603) R6 1 10kI Q5% resistor (0603) 1FF Q10%, 10V X7R ceramic capacitors (0603) TDK C1608X7R1A105K C2 1 0.
PAGE 3
MAX7304PMB1 Peripheral Module Table 3. Connector J3 (Daisy-Chain I2C) Table 2.
PAGE 4
Maxim Integrated 1 2 3 4 5 6 GND C1 1uF R1 R2 R3 JP1 1 3 5 2 4 6 GND R6 10k AD0 C3 1uF Failure to follow data sheet guidelines for limits of externally applied voltage may damage or destroy the device. VLA = user applied external VCC VCC SD SC INT SC SD GND VCC R5 4.7k GND VCC VCC R4 4.
PAGE 5
MAX7304PMB1 Peripheral Module Figure 2. MAX7304PMB1 Peripheral Module Component Placement Guide—Component Side Figure 3. MAX7304PMB1 Peripheral Module PCB Layout— Component Side Figure 4.
PAGE 6
MAX7304PMB1 Peripheral Module Figure 5. MAX7304PMB1 Peripheral Module PCB Layout— Inner Layer 2 (Power) Figure 6. MAX7304PMB1 Peripheral Module PCB Layout— Solder Side Figure 7.
PAGE 7
MAX7304PMB1 Peripheral Module Ordering Information PART MAX7304PMB1# TYPE Peripheral Module #Denotes RoHS compliant.
PAGE 8
MAX7304PMB1 Peripheral Module Revision History REVISION NUMBER REVISION DATE 0 5/12 DESCRIPTION Initial release PAGES CHANGED — Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time.