參數(shù)資料
型號: MAX6664AEE
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: 溫度/濕度傳感器
英文描述: Temperature Monitors and PWM Fan Controllers
中文描述: ANALOG TEMP SENSOR-VOLTAGE, 0.8-2.6V, 1Cel, RECTANGULAR, SURFACE MOUNT
封裝: 0.150 INCH, 0.025 PITCH, MO-137, QSOP-16
文件頁數(shù): 6/24頁
文件大小: 297K
代理商: MAX6664AEE
M
Temperature Monitors and
PWM Fan Controllers
6
_______________________________________________________________________________________
Detailed Description
The MAX6653/MAX6663/MAX6664 are local/remote
temperature monitors and fan controllers for micro-
processor-based systems. These devices communi-
cate with the system through a serial SMBus interface.
The serial bus controller features a hard-wired address
pin for device selection, an input line for a serial clock,
and a serial line for reading and writing addresses and
data (see
Functional Diagram
).
The MAX6653/MAX6663/MAX6664 fan control section
can operate in three modes. In the automatic fan-control
mode, the fan
s power-supply voltage is automatically
adjusted based on temperature. The control algorithm
parameters are programmable to allow optimization to
the characteristics of the fan and the system. RPM select
mode forces the fan speed to a programmed tachome-
ter value. PWM duty cycle select mode allows user
selection of the PWM duty cycle. PWM rise and fall times
are limited to maximize fan reliability.
To ensure overall system reliability, the MAX6653/
MAX6663/MAX6664 feature an SMBus timeout so that
the MAX6653/MAX6663/MAX6664 can never
lock
the
SMBus. Furthermore, the availability of hard-wired
default values for critical temperature set points
ensures the MAX6653 controls critical temperature
events properly even if the SMBus is
locked
by some
other device on the bus.
SMBus Digital Interface
From a software perspective, the MAX6653/MAX6663/
MAX6664 appear as a set of byte-wide registers. These
devices use a standard SMBus 2-wire/I
2
C-compatible
serial interface to access the internal registers. The
MAX6653/MAX6663/MAX6664 slave address can be
set to three different values by the input pin ADD
(Table 2) and, therefore, a maximum of three MAX6653/
MAX6663/MAX6664 devices can share the same bus.
The MAX6653/MAX6663/MAX6664 employ four stan-
dard SMBus protocols: Write Byte, Read Byte, Send
Byte, and Receive Byte (Figures 1, 2, and 3). The short-
er Receive Byte protocol allows quicker transfers, pro-
vided that the correct data register was previously
selected by a Read Byte instruction. Use caution with
the shorter protocols in multimaster systems, since a
second master could overwrite the command byte with-
out informing the first master.
Alert Response Address
The MAX6653/MAX6663/MAX6664 respond to the
SMBus alert response address, an event which typical-
ly occurs after an SMBus host master detects an
INT
interrupt signal going active (referred to as
ALERT
in
SMBus nomenclature). When the host master puts the
alert response address (0001 1001) on the bus, all
devices with an active
INT
output respond by putting
their own address onto the bus. The alert response can
activate several different slave devices simultaneously,
similar to the I
2
C general call. If more than one slave
attempts to respond, bus arbitration rules apply, and
the device with the lowest address code wins. The
master then services the devices from the lowest
address up.
THERM
SET POINT (
°
C)
REMOTE
85
90
95
100
105
110
115
120
125
SHUTDOWN SET POINT (
°
C)
REMOTE
110
115
120
125
125
125
125
125
125
CRIT1
CRIT0
LOCAL
55
60
65
70
75
80
85
90
95
LOCAL
80
85
90
95
95
95
95
95
95
GND
GND
GND
Open
Open
Open
V
CC
V
CC
V
CC
Open
GND
V
CC
Open
GND
V
CC
Open
GND
V
CC
Table 1. MAX6653 Power-Up Set-Point Decoding
Table 2. MAX6653/MAX6663/MAX6664
Slave Address Decoding
ADD PIN
GND
No connect
V
CC
ADDRESS
0101 100
0101 110
0101 101
相關(guān)PDF資料
PDF描述
MAX6653AEE HEX INVERTERS 20-LCCC -55 to 125
MAX6657-MAX6659 【1∑C, SMBus-Compatible Remote/Local Temperature Sensors with Overtemperature Alarms
MAX6657MSA 【1∑C, SMBus-Compatible Remote/Local Temperature Sensors with Overtemperature Alarms
MAX6658MSA 【1∑C, SMBus-Compatible Remote/Local Temperature Sensors with Overtemperature Alarms
MAX6659MEE 【1∑C, SMBus-Compatible Remote/Local Temperature Sensors with Overtemperature Alarms
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX6664AEE+ 功能描述:板上安裝溫度傳感器 Temperature Monitor & PWM Fan Controller RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor
MAX6664AEE+T 功能描述:板上安裝溫度傳感器 Temperature Monitor & PWM Fan Controller RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor
MAX6664AEE-T 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor
MAX6664AEE-TG075 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
MAX6665ASA070 制造商:Maxim Integrated Products 功能描述: