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MAX6651EEE bảng dữ liệu(PDF) 6 Page - Maxim Integrated Products

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Giải thích chi tiết về linh kiện  Fan-Speed Regulators and Monitors with SMBus/I2C-Compatible Interface
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MAX6651EEE bảng dữ liệu(HTML) 6 Page - Maxim Integrated Products

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HEX
96
36
3E
90
Fan-Speed Regulators and Monitors
with SMBus/I2C-Compatible Interface
6
Maxim Integrated
MAX6650/MAX6651
The MAX6650/MAX6651 employ three standard SMBus
protocols: write byte, read byte, and receive byte
(Figure 2). The shorter protocol (receive) allows quicker
transfers, provided that the correct data register was
previously selected by a write or read byte instruction.
Use caution with the shorter protocol in multimaster
systems, since a second master could overwrite the
command byte without informing the first master.
Slave Addresses
The device address can be set to one of four different
values. Accomplish this by pin-strapping ADD so that
more than one MAX6650/MAX6651 can reside on the
same bus without address conflicts (Table 1).
SMBus/I2C
INTERFACE
SMBus/I2C
INTERFACE
VCC
3V TO 5.5V
VCC
SCL
SDA
ADD
GND
FAN SPEED
CONFIGURE
ALARM ENABLE
ALARM STATUS
TACH COUNT
COUNT TIME
GPIO DEF
GPIO STATUS
DAC
ADDRESS
DECODE
TACHOMETER
COUNT
CONTROL
LOGIC
8-BIT
DAC
10k
Ω
VREF
GPIO
BLOCKS
(FIGURE 5)
GPIO0
OUT
FB
TACH0
GPIO1
10k
Ω
90k
Ω
90k
Ω
10k
Ω
MAX6650
MAX6651
ALERT
FULL ON
FAN
VFAN = 5V OR 12V
VOFFSET
Figure 1. Block Diagram
Table 1. Slave Address Decoding (ADD)
BINARY
VCC
1001 011
No connection (high-Z)
0011 011
10k
Ω resistor to GND
0011 111
ADDRESS
ADD
1001 000
GND



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