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參數資料
型號: MAX6664AEE+T
廠商: Maxim Integrated
文件頁數: 9/24頁
文件大?。?/td> 297K
描述: IC TEMP MON FAN CNTRL 16-QSOP
產品培訓模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 2,500
功能: 風扇控制,溫度監(jiān)控器
傳感器類型: 內部和外部
感應溫度: -40°C ~ 125°C,外部傳感器
精確度: ±2°C 本地(最大),±3°C 遠程(最大)
拓撲: ADC,多路復用器,寄存器庫,測速計
輸出類型: I²C?/SMBus?
輸出警報:
輸出風扇:
電源電壓: 3 V ~ 5.5 V
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 16-SSOP(0.154",3.90mm 寬)
供應商設備封裝: 16-QSOP
包裝: 帶卷 (TR)
Temperature Monitors and
PWM Fan Controllers
_______________________________________________________________________________________   9
Temperature Comparison
and Interrupt System
At the end of each conversion cycle, the converted
temperature data are compared to various set-point
thresholds to control the INT, THERM, SDL, and SDR
outputs. All temperature threshold limits are stored in
the threshold limit registers (Table 6) and can be
changed through the SMBus digital interface.
THERM is an active-low thermal-overload output indicat-
ing that the THERM overtemperature set point is exceed-
ed. With the THERM threshold set to an appropriate value,
the THERM output can be used to control clock throttling.
When this pin is pulled low by an external signal, a status
bit (bit 7, status register 2) is set, and the fan speed is
unconditionally forced to full-on speed. The only way to
reset the status bit is to read status register 2. Connect a
10k& pullup resistor between THERM and V
CC
.
Table 4. Temperature Data Low Byte Format Structure: LLLXXRRR*
Table 5. Temperature Conversion Rate Setting (Fan Filter Register (23h)POR = 111)
FRACTIONAL TEMPERATURE (?/SPAN>C)
DIGITAL OUTPUT (LOCAL)
DIGITAL OUTPUT (REMOTE)
0.000
000X XXXX
XXX XX 000
0.125
001X XXXX
XXX XX 001
0.25
010X XXXX
XXX XX 010
0.375
011X XXXX
XXX XX 011
0.5
100X XXXX
XXX XX 100
0.625
101X XXXX
XXX XX 101
0.75
110X XXXX
XXX XX 110
0.875
111X XXXX
XXX XX 111
BIT 4
BIT 3
BIT2
CONVERSION RATE (Hz)
CONVERSION TIME (s)
0
0
0
0.0625
16
0
0
1
0.125
8
0
1
0
0.25
4
0
1
1
0.5
2
1
0
0
1
1
1
0
1
2
0.5
1
1
0
4
0.25
1
1
1
4
0.25
*Where: LLL = local fractional temperature bits, XX = dont care, RRR = remote fractional temperature bits.
NAME
ADDRESS
R/W
MAX6653 POR VALUE
MAX6663/MAX6664 POR STATE
DESCRIPTION
LTH
14h
R/W
Set by CRIT0 and CRIT1
0011 1100
Local temp high limit
LTL
15h
R/W
Set by CRIT0 and CRIT1
0000 0000
Local temp low limit
LTHER
16h
R/W
Set by CRIT0 and CRIT1
0100 0110
Local temp THERM limit
RTH
18h
R/W
Set by CRIT0 and CRIT1
0101 0000
Remote temp high limit
RTL
19h
R/W
Set by CRIT0 and CRIT1
0000 0000
Remote temp low limit
RTHER
1Ah
R/W
Set by CRIT0 and CRIT1
0110 0100
Remote temp THERM limit
LTSD
1Bh
R/W
Set by CRIT0 and CRIT1
N/A
Local temp shutdown limit
(MAX6653 only)
RTSD
1Ch
R/W
Set by CRIT0 and CRIT1
N/A
Remote temp shutdown limit
(MAX6653 only)
Table 6. Threshold Limit Registers
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