Datasheet > FMS2704T1C

FMS2704T1C

更新时间： 2024-02-10 23:15:47

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		光电二极管
页数	文件大小	规格书
39页	173K
描述
Analog Circuit, 1 Func, PDSO24, TSSOP-24

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FMS2704T1C 技术参数

生命周期：	Obsolete	零件包装代码：	TSSOP
包装说明：	TSSOP,	针数：	24
Reach Compliance Code：	unknown	HTS代码：	8542.39.00.01
风险等级：	5.84	模拟集成电路 - 其他类型：	ANALOG CIRCUIT
JESD-30 代码：	R-PDSO-G24	长度：	7.8 mm
功能数量：	1	端子数量：	24
最高工作温度：	85 °C	最低工作温度：
封装主体材料：	PLASTIC/EPOXY	封装代码：	TSSOP
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
认证状态：	Not Qualified	座面最大高度：	1.2 mm
标称供电电压 (Vsup)：	5 V	表面贴装：	YES
温度等级：	OTHER	端子形式：	GULL WING
端子节距：	0.65 mm	端子位置：	DUAL
宽度：	4.4 mm	Base Number Matches：	1

FMS2704T1C 数据手册

www.fairchildsemi.com

FMS 2 7 0 4 /FMS 2 7 0 4 L

S m a rt TTV Ha rd w a re Mo n it o r

Tachometer inputs are monitored continuously with speeds

compared with internal limits stored in registers. Individual

fan speeds can be sensed through the six TACH inputs.

Features

• Six tachometer inputs

• Two analog/PWM fan-speed outputs

• Fan speed controller mode

• Dual remote thermal diode inputs

• Local (on-chip) temperature sense

• Voltage monitoring

Remote and local diode temperatures are monitored at a 1Hz

rate. Diode temperatures are digitized to 1°C resolution prior

to storage in remote and local temperature registers. Violations

of temperature limits/trip points set interrupt register bits and

assert the INT or THERM outputs.

• Serial Bus access to internal registers

• Thermal Alarm output

• Maskable Interrupt output

• Status & Conﬁguration registers

• Integrated Reset Generators

Reset output, RST is asserted if STANDBY = L or VCC ≤

2.9/2.9/4.4V. Voltages V_1-6can be monitored in place of the

diode inputs and tachometer inputs 5 and 6.

Fan noise can be minimized using the Controller Mode to set

speed as a function of temperature. Alternatively, external

ﬁrmware/software can be used to control the fan speed volt-

Description

The FMS2704 is a Smart Tachometer/ Thermometer/

Voltmeter with a fan speed control mode independent of

system management software or BIOS. Outputs are two fan

control voltages, THERM alarm and interrupt INT.

ages, FAN_SPD_A,B

Supply voltages are 5.0V for the FMS2704 and 3.3V for the

FMS2704L. Performance is speciﬁed from 0 to 85°C. Package

is a 24-lead TSSOP

Block Diagram

OSC1

OSC2

3.58 MHz

Oscillator

VCC

ADD

Main Reset

RST

Timing

and Control

STANDBY

SDA

SCL

SMBus

Interface

Internal Reset

T_L, T_R

Fan Speed

Controller

Internal Bus

8-bit DAC

Converters

FAN_SPDA

FAN_SPDB

Current

Generators

D/A

8-bit DAC

Converters

Registers

DXP1/V1

DXN1/V2

Low-pass

Filter

Interrupt

Status

Registers

Voltage/

Temperature

Comparators

A/D

Converter

THERM

DSP

DXP2/V3

DXN2/V2

Low-pass

Filter

Mux

On-chip

Temperature

Sensor

Interrupt

Mask

Trip & Limit

Registers

V5/V6

Mask

Gating

INT

TACHA1

TACHB1

TACHA2

TACHB2

Tachometers

Configuration

TACHA3/V5

TACHB3/V6

REV. 1.01 12/2/99

12 3 4 5 6 7...39

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