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參數資料
| 型號： | FMS2701QSC |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 電源管理 |
| 英文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封裝： | QSOP-16 |
| 文件頁數： | 1/24頁 |
| 文件大?。?/td> | 110K |
| 代理商： | FMS2701QSC |
www.fairchildsemi.com
Pr
eliminar
y
Infor
mation
PRELIMINARY INFORMATION describes products that are not in full production at the time of printing. Specifications are based on design goals
and limited characterization. They may change without notice. Contact Fairchild Semiconductor for current information.
Features
Remote diode temperature sensing
Ambient (on-chip) temperature sense
Dual 3.3 volt supply monitoring
SMBus interface to internal registers
Status registers
Thermal trip output
Interrupt output
Fan speed control output
ACPI Thermal Management compliant
Applications
PCs and Servers, Workstations
Ofce Equipment
Test and Measurement Instruments
Description
The FMS2701 is a temperature- and voltage-monitoring
device that can be interrogated and controlled through an
SMBus serial interface. Outputs are an analog fan control
voltage, thermal alarm and interrupts.
Remote (DIODE+ and DIODE-) and ambient diode temper-
ature sensor inputs are selected in sequence at a 1Hz rate by
a multiplexer that drives an A/D converter. Digitized diode
temperatures are stored in registers. Violation of a program-
mable limit or trip point will set an interrupt register bit and/
or assert a digital output.
Power supply voltages are monitored through two pins:
VCCAUX3 monitors the power to the FMC2701; VCC3 is a
separate 3.3 volt sense voltage input. AUXRST and RST out-
puts indicate the status of voltage monitoring.
Analog output, FAN_SPD can be used as an input to a fan
speed control circuit while THERM, INT and FAN_OFF are
additional digital control outputs.
Power is derived from a +3.3V supply. Package is 16-lead
Quad Small Outline Pack (QSOP).
FMS2701
Temperature and Power Supply Voltage Monitor
Rev. 1.0.3
Block Diagram
SMBus
Interface
D/A
Converter
Interrupt
Status
Registers
Mask
Gating
Configuration
Register
Limit
Comparators
Value & Limit
Registers
Interrupt
Mask
Register
DIODE+
DSP
FAN_OFF
INT
THERM
AUXRST
VCC3AUX
VCC3
RST
MR
SDA
SCL
FAN_SPD
GPI
Current
Generators
Low-pass
Filter
On-chip
Bias &
Diode
Mux
A/D
Converter
Aux Reset
Main Reset
Oscillator
Timing
and Control
INTRST
ADD
Internal Bus
DIODE-
D/A
Register
Lit. No. 600402-001
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