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| 型号： | MAX6639ATE+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 13/22页 |
| 文件大小： | 0K |
| 描述： | IC TEMP MONITOR 2CH 16-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 功能： | 风扇控制，温度监控器 |
| 传感器类型： | 内部和外部 |
| 感应温度： | 0°C ~ 150°C，外部传感器 |
| 精确度： | ±2°C 本地（最大），±1°C 远程（最大） |
| 拓扑： | ADC，PWM 发生器，转速计计数器 |
| 输出类型： | I²C?/SMBus? |
| 输出警报： | 是 |
| 输出风扇： | 是 |
| 电源电压： | 3 V ~ 3.6 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WQFN 裸露焊盘 |
| 供应商设备封装： | 16-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
MAX6639/MAX6639F
2-Channel Temperature Monitor with Dual,
Automatic, PWM Fan-Speed Controller
Table 4. Register Map (continued)
READ/
WRITE
W
R
W
REGISTER
NO.
ADDRESS
26h
27h
27h
POR
STATE
0011
1100
0000
0000
0011
1100
FUNCTION
Fan 1 target
duty cycle
Fan 2 current
duty cycle
Fan 2 target
duty cycle
D7
MSB
MSB
MSB
D6
—
—
—
D5
—
—
—
D4
—
—
—
D3
—
—
—
D2
—
—
—
D1
—
—
—
D0
LSB
LSB
LSB
Channel 1
R/W
28h
0100
000
minimum
fan-start
MSB
—
—
—
—
—
—
LSB
temperature
Channel 2
R/W
29h
0100
0000
minimum
fan-start
MSB
—
—
—
—
—
—
LSB
temperature
R
R
R
3Dh
3Eh
3Fh
0101
1000
0100
1101
0000
0000
Read device
ID
Read
manufacturer
ID
Read device
revision
0
0
0
1
1
0
0
0
0
1
0
0
1
1
0
0
1
0
0
0
0
0
1
0
Mask Register (03h)
This register masks the ALERT , OT , THERM , and
FANFAIL outputs. A 1 prevents the corresponding fail-
ures from being asserted on these outputs. The mask
bits do not affect the status register.
Global Configuration Register (04h)
The global configuration register controls the shutdown
mode, power-on reset, SMBus timeout, and tempera-
ture channel 2 source select:
? D7: Run/Standby. Normal operation is run (0).
Setting this bit to 1 suspends conversions and puts
the MAX6639 into low-power sleep mode.
? D6: Software POR. Writing a 1 resets all registers to
their default values.
? D5: SMBus Timeout Disable. Writing a zero enables
SMBus timeout for prevention of bus lockup. When
the timeout function is enabled, the SMBus interface
is reset if SDA or SCL remains low for more than
74ms (typ).
? D4: Temperature Channel 2 Source. Selects either
local or remote 2 as the source for temperature chan-
Maxim Integrated
nel 2 register data. Writing a zero to this bit selects
remote 2 for temperature channel 2.
? D3: PWM Output Frequency Range. Selects either
the 20Hz to 100Hz range or the 5kHz to 25kHz range
for the PWM outputs (see Table 9).
Extended Temperature Registers (05h and 06h)
These registers contain the extended temperature data
from channels 1 and 2. Bits D[7:5] contain the 3 LSBs
of the temperature data. The bit values are 0.5 ° C,
0.25 ° C, and 0.125 ° C. When bit 0 is set to 1, a diode
fault has been detected.
Channel 1 and Channel 2 ALERT , OT , and THERM
Limits (08h Through 0Dh)
These registers contain the temperatures above which
the ALERT , THERM , and OT status bits set and outputs
assert (for the temperature channels that are not
masked). The data format is the same as that of the
channel 1 and channel 2 temperature registers: the
LSB weight is +1 ° C and the MSB is +128 ° C.
13
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