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参数资料
| 型号： | MAX6639ATE+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 5/22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
Typical Operating Characteristics (continued)
(V CC = 3.3V, T A = +25°C.)
35
34
33
32
31
30
PWMOUT FREQUENCY
vs. DIE TEMPERATURE
35
34
33
32
31
30
PWMOUT FREQUENCY
vs. SUPPLY VOLTAGE
-40
-15
10
35
60
85
110
3.0
3.5
4.0
4.5
5.0
5.5
TEMPERATURE ( ° C)
SUPPLY VOLTAGE (V)
Pin Description
PIN
TQFN-EP
1, 15
2, 16
QSOP
3, 1
4, 2
NAME
PWM2,
PWM1
TACH2,
TACH1
FUNCTION
Open-Drain Output to Power-Transistor Driving Fan. Connect to the gate of a MOSFET or base of a
bipolar transistor. PWM_ requires a pullup resistor. The pullup resistor can be connected to a
supply voltage as high as 13.5V, regardless of the MAX6639’s supply voltage.
Tachometer Inputs. Connect to the tachometer output of the fan. TACH_ requires a pullup resistor.
The pullup resistor can be connected to a supply voltage as high as 13.5V, regardless of the
MAX6639’s supply voltage.
3
5
FANFAIL Active-Low, Open-Drain, Fan-Failure Output. Open circuit when V CC = 0.
4
5
6
7
8, 10
9
11
12
13
14
6
7
8
10
9, 12
11
13
14
16
15
THERM
OT
V CC
GND
DXP1,
DXP2
DXN
ADD
ALERT
SCL
SDA
Active-Low, Open-Drain Thermal Alarm Output. Typically used for clock throttling. Open circuit
when V CC = 0.
Active-Low, Open-Drain Overtemperature Output. Typically used for system shutdown or clock
throttling. Can be pulled up to 5.5V regardless of V CC . Open circuit when V CC = 0.
Power-Supply Input. 3.3V nominal. Bypass V CC to GND with a 0.1μF capacitor.
Ground. Connect to a clean ground reference.
Combined Current Source and A/D Positive Input for Remote Diode. Connect to anode of remote-
diode-connected temperature-sensing transistor. Do not leave unconnected; connect to DXN if no
remote diode is used. Place a 2200pF capacitor between DXP_ and DXN for noise filtering.
Remote Diode Current Sink Input. Connect Cathode of the Remote-Diode-Connected Transistor to DXN
Address Input. Sets device slave address. Connect to GND, V CC , or leave unconnected to give
three unique addresses. See Table 1.
Active-Low, Open-Drain SMBus Alert Output
SMBus Serial-Clock Input. Can be pulled up to 5.5V regardless of V CC . Open circuit when V CC =
SMBus Serial-Data Input/Output, Open Drain. Can be pulled up to 5.5V regardless of V CC . Open
circuit when V CC = 0.
Exposed Pad (TQFN package only). Internally connected to GND. Connect EP to a large PCB pad
—
—
EP
for optimum performance and enhanced thermal dissipation. Not intended as an electrical
connection point.
Maxim Integrated
5
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