MAX6581TG9A+【PDF 7/27 页】IC TEMP SENSOR 8-CH PREC 24-TQFN

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Sheet目录43

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Maxim Integrated

?癈 Accurate 8-Channel Temperature Sensor

MAX6581

Pin Description (continued)

NAME

FUNCTION

DXN4

Cathode Input for Channel 4 Remote Diode. Connect the cathode of the channel 4 remote-diode-

connected transistor to DXN4. If the channel 4 remote transistor is a substrate pnp (e.g., on a CPU

die), connect the base of the pnp to DXN4. Leave DXN4 unconnected or connect to DXP4 if a

remote diode is not used. Connect a 100pF capacitor between DXP4 and DXN4 for noise filtering.

DXP5

Combined Current Source and ADC Positive Input for Channel 5 Remote Diode. Connect DXP5 to

the anode of a remote-diode-connected, temperature-sensing transistor. Leave DXP5 unconnected

or connect to DXN5 if a remote diode is not used. Connect a 100pF capacitor between DXP5 and

DXN5 for noise filtering.

DXN5

Cathode Input for Channel 5 Remote Diode. Connect the cathode of the channel 5 remote-diode-

connected transistor to DXN5. If the channel 5 remote transistor is a substrate pnp (e.g., on a CPU

die), connect the base of the pnp to DXN5. Leave DXN5 unconnected or connect to DXP5 if a

remote diode is not used. Connect a 100pF capacitor between DXP5 and DXN5 for noise filtering.

DXN6

Cathode Input for Channel 6 Remote Diode. Connect the cathode of the channel 6 remote-diode-

connected transistor to DXN6. If the channel 6 remote transistor is a substrate pnp (e.g., on a CPU

die), connect the base of the pnp to DXN6. Leave DXN6 unconnected or connect to DXP6 if a

remote diode is not used. Connect a 100pF capacitor between DXP6 and DXN6 for noise filtering.

DXP6

Combined Current Source and ADC Positive Input for Channel 6 Remote Diode. Connect DXP6 to

the anode of a remote-diode-connected, temperature-sensing transistor. Leave DXP6 unconnected

or connect to DXN6 if a remote diode is not used. Connect a 100pF capacitor between DXP6 and

DXN6 for noise filtering.

DXN7

Cathode Input for Channel 7 Remote Diode. Connect the cathode of the channel 7 remote-diode-

connected transistor to DXN7. If the channel 7 remote transistor is a substrate pnp (e.g., on a CPU

die), connect the base of the pnp to DXN7. Leave DXN7 unconnected or connect to DXP7 if a

remote diode is not used. Connect a 100pF capacitor between DXP7 and DXN7 for noise filtering.

DXP7

Combined Current Source and ADC Positive Input for Channel 7 Remote Diode. Connect DXP7 to

the anode of a remote-diode-connected, temperature-sensing transistor. Leave DXP7 unconnected

or connect to DXN7 if a remote diode is not used. Place a 100pF capacitor between DXP7 and

DXN7 for noise filtering.

STBY

Active-Low Standby Input. Drive STBY logic-low to place the MAX6581 in standby mode, or logic-

high for normal mode. Temperature and threshold data are retained in standby mode.

I.C.

Internally Connected. I.C. is internally connected to V

. Connect I.C. to V

or leave unconnected.

OVERT

Overtemperature Active-Low, Open-Drain Output. OVERT asserts low when the temperature of any

remote channel exceeds the programmed threshold limit.

Supply Voltage Input. Bypass to GND with a 0.1FF capacitor.

ALERT

SMBus Alert (Interrupt), Active-Low, Open-Drain Output. ALERT asserts low when the temperature of

any channel crosses a programmed ALERT high or low threshold.

SMBDATA SMBus Serial-Data Input/Output. Connect SMBDATA to a pullup resistor.

SMBCLK

SMBus Serial-Clock Input. Connect SMBCLK to a pullup resistor.

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