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參數(shù)資料
General Description
The MAX7315 I2C-/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.
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.
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.
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.
Applications
Features
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
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 (1.2A typ; 3.3A 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
MAX7315
8-Port I/O Expander with LED Intensity
Control, Interrupt, and Hot-Insertion Protection
________________________________________________________________ Maxim Integrated Products
1
12
11
10
9
INT/O8
P7
P6
5
6
7
8
P3
GND
P5
16
15
14
13
AD1
ADO
V+
12
3
4
AD2
P0
P1
P2
SDA
P4
SCL
THIN QFN
TOP VIEW
MAX7315ATE
Pin Configurations
19-3056; Rev 3; 1/05
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.
EVALUATION
KIT
AVAILABLE
Ordering Information
PART
TEMP
RANGE
PIN-
PACKAGE
TOP
MARK
PKG
CODE
MAX7315ATE -40°C to +125°C
16 Thin QFN
3mm x 3mm
x 0.8mm
AAU
T1633-4
MAX7315AEE -40°C to +125°C
16 QSOP
—
MAX7315AUE -40°C to +125°C
16 TSSOP
—
Pin Configurations continued at end of data sheet.
LCD Backlights
LED Status Indication
Portable Equipment
Laptop Computers
Keypad Backlights
RGB LED Drivers
Cellular Phones
Typical Application Circuit appears at end of data sheet.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX7315AUE | 功能描述:接口-I/O擴展器 8-Bit I/O Port Expander RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| MAX7315AUE+ | 功能描述:接口-I/O擴展器 8-Bit I/O Port Expander RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| MAX7315AUE+T | 功能描述:接口-I/O擴展器 8-Bit I/O Port Expander RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| MAX7315AUE-G05 | 功能描述:接口-I/O擴展器 8-Bit I/O Port Expander RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| MAX7315AUE-T | 功能描述:接口-I/O擴展器 8-Bit I/O Port Expander RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
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