19-3056; Rev 3; 1/05
8-Port I/O Expander with LED Intensity
Control, Interrupt, and Hot-Insertion Protection
General Description
Features
2
The MAX7315 I C-/SMBus-compatible serial interfaced
peripheral provides microprocessors with 8 I/O ports.
Each I/O port can be individually configured as either an
open-drain current-sinking output rated at 50mA at 5.5V,
or a logic input with transition detection. A ninth port can
be used for transition detection interrupt or as a general-
purpose output. The outputs are capable of directly dri-
ving LEDs, or providing logic outputs with external
resistive pullup up to 5.5V.
o 400kbps, 2-Wire Serial Interface, 5.5V Tolerant
o 2V to 3.6V Operation
o Overall 8-Bit PWM LED Intensity Control
Global 16-Step Intensity Control
Plus Individual 16-Step Intensity Control
o Automatic Two-Phase LED Blinking
o 50mA Maximum Port Output Current
o Supports Hot Insertion
PWM current drive is integrated with 8 bits of control.
Four bits are global control and apply to all LED outputs
to provide coarse adjustment of current from fully off to
fully on in 14 intensity steps. Each output then has indi-
vidual 4-bit control, which further divides the globally
set current into 16 more steps. Alternatively, the current
control can be configured as a single 8-bit control that
sets all outputs at once.
o Outputs Are 5.5V-Rated Open Drain
o Inputs Are Overvoltage Protected to 5.5V
o Transition Detection with Interrupt Output
o Low Standby Current (1.2µA typ; 3.3µA max)
o Tiny 3mm x 3mm, Thin QFN Package
o -40°C to +125°C Temperature Range
o All Ports Can Be Configured as Inputs or Outputs
The MAX7315 is pin and software compatible with the
PCA9534 and PCA9554(A).
Each output has independent blink timing with two blink
phases. All LEDs can be individually set to be on or off
during either blink phase, or to ignore the blink control.
The blink period is controlled by a register.
Ordering Information
PIN-
TEMP
TOP
PKG
PART
PACKAGE
RANGE
MARK CODE
The MAX7315 supports hot insertion. All port pins, the INT
output, SDA, SCL, and the slave address inputs ADO-2
remain high impedance in power-down (V+ = 0V) with up
to 6V asserted upon them.
The MAX7315 is controlled through the 2-wire I2C/SMBus
serial interface, and can be configured to one of 64 I2C
addresses.
16 Thin QFN
3mm x 3mm
x 0.8mm
MAX7315ATE -40°C to +125°C
AAU T1633-4
16 QSOP
MAX7315AEE -40°C to +125°C
MAX7315AUE -40°C to +125°C
—
—
—
—
16 TSSOP
Applications
Pin Configurations
LCD Backlights
Keypad Backlights
RGB LED Drivers
Cellular Phones
TOP VIEW
LED Status Indication
Portable Equipment
Laptop Computers
12 11 10
9
SDA 13
V+ 14
8
7
6
5
P5
P4
MAX7315ATE
GND
P3
ADO 15
AD1 16
Typical Application Circuit appears at end of data sheet.
1
2
3
4
THIN QFN
Pin Configurations continued at end of data sheet.
________________________________________________________________ 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.
5秒后页面跳转
全球首块英伟达H200交付 黄仁勋“送货上门”
常用8脚开关电源芯片型号大全
74HC04芯片引脚图及功能、应用电路图讲解
CR6842芯片参数、引脚配置、应用电路图详解
微信公众号
抖音公众号
浙公网安备 33010502006866号 浙ICP备10014259号-119
营业执照ICP证
数据手册
如果您发现信息不准确，
