MAX7302 Datasheet, PDF (1/29 Pages) Maxim Integrated Products – SMBus/I2C Interfaced 9-Port, Level-Translating GPIO and LED Driver with CLA

19-0749; Rev 0; 7/07
SMBus/I²C Interfaced 9-Port,
Level-Translating GPIO and LED Driver with CLA
General Description
The MAX7302 I²C-/SMBus™-compatible, serial-interfaced
peripheral features 9 level-translating I/Os, and operates
from a 1.62V to 3.6V power supply. The MAX7302 fea-
tures a port supply V_LA that allows level-translation on I/O
ports to operate from a separate power supply from 1.62V
to 5.5V. An address select input, AD0, allows up to four
unique slave addresses for the device.
The MAX7302 ports P2–P9 can be configured as inputs,
push-pull outputs, and open-drain outputs. Port P1 can
be configured as a general-purpose input, open-drain
output, or an open-drain INT output. Ports P2–P9 can be
configured as OSCIN and OSCOUT, respectively. Ports
P2–P9 can also be used as configurable logic arrays
(CLAs) to form user-defined logic gates, replacing exter-
nal discrete gates. Outputs are capable of sinking up to
25mA, and sourcing up to 10mA when configured as
push-pull outputs.
The MAX7302 includes an internal oscillator for PWM,
blink, and key debounce, or to cascade multiple
MAX7302s. The external clock can be used to set a spe-
cific PWM and blink timing. The RST input asynchronous-
ly clears the 2-wire interface and terminates a bus lockup
involving the MAX7302.
All ports configured as an output feature a 33-step PWM,
allowing any output to be set from fully off, 1/32 to 31/32
duty cycle, to fully on. All output ports also feature LED
blink control, allowing blink periods of 1/8s, 1/4s, 1/2s, 1s,
2s, 4s, or 8s. Any port can blink during this period with a
1/16 to 15/16 duty cycle.
The MAX7302 is specified over the -40°C to +125°C
temperature range and is available in 16-pin QSOP and
16-pin TQFN (3mm x 3mm) packages.
Applications
Cell Phones
Servers
System I/O Ports
LCD/Keypad Backlights
LED Status Indicators
Pin Configurations appear at end of data sheet.
Features
♦ 1.62V to 5.5V I/O Level-Translation Port Supply (V_LA)
♦ 1.62V to 3.6V Power Supply
♦ 9 Individually Configurable GPIO Ports
P1 Open-Drain I/O
P2–P9 Push-Pull or Open-Drain I/Os
♦ Individual 33-Step PWM Intensity Control
♦ Blink Controls with 15 Steps on Outputs
♦ 1kHz PWM Period Provides Flicker-Free LED
Intensity Control
♦ 25mA (max) Port Output Sink Current (100mA
max Ground Current)
♦ Inputs Overvoltage Protected Up to 5.5V (V_LA)
♦ Transition Detection with Optional Interrupt Output
♦ Optional Input Debouncing
♦ I/O Ports Configurable as Logic Gates (CLA)
♦ External RST Input
♦ Oscillator Input and Output Enable Cascading
Multiple Devices
♦ Low 0.75µA (typ) Standby Current
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX7302AEE+ -40°C to +125°C 16 QSOP
E16-4
MAX7302ATE+
-40°C to +125°C
16 TQFN-EP*
(3mm x 3mm)
T1633-4
+Denotes lead-free package.
*EP = Exposed paddle.
Typical Operating Circuit
+1.8V
+4.5V
µC
SDA
SCL
RST
INT
VDD
VLA
SDA
MAX7302
SCL
RST
P2
P1/INT
P3
P4
P5
P6
P7
P8
ADO
GND
P9
1.8V OPEN-DRAIN OUTPUT
4.5V PUSH-PULL OUTPUT
4.5V LOGIC INPUT
3.3V LOGIC INPUT
2.5V LOGIC INPUT
SMBus is a trademark of Intel Corp.
________________________________________________________________ Maxim Integrated Products 1
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