W83L784G

Series: -
Accuracy: ±3°C(Max)
Output Alarm: Yes
Mounting Type: Surface Mount
Output Fan: Yes
Output Type: I²C?
Packaging: Tube
Sensor Type: Internal & External
Function: Hardware Monitor
Operating Temperature: 0°C ~ 70°C
Voltage - Supply: 4.5 V ~ 5.5 V
Topology: ADC
Manufacturer: Nuvoton Technology Corporation of America
Sensing Temperature: 0°C ~ 70°C, External Sensor
Package / Case: 20-SSOP (0.209", 5.30mm Width)
Supplier Device Package: 20-SSOP


Features:

2.1 Monitoring Items
• 2 thermal inputs from remote thermistors or 2N3904 NPN-type transistors or Pentium^TM II
(Deschutes) thermal diode output
• One on-chip temperature detection
• 4 voltage inputs
--- typical for Vcore, +3.3V, +5V, Battery
• 2 sets of fan speed control and fan speed monitoring input
• WATCHDOG comparison of all monitored values
• Programmable hysteresis and setting points (alarm thresholds) for all monitored items
2.2 Actions Enabling
• Issue fan fault signal as fans are abnomally stopped
• Issue battery low signal as bettery voltage is abnomally out of range
• 2 PWM (pulse width modulation) outputs for fan speed control to support"Thermal Cruise^TM 􀁔 "or"Speed Cruise^TM "􀁔
--- Automatically maintain the CPU or system in the specific temperature or keep the fans in the
specific speed under the H/W control
• Issue SMI#, OVT#, GPO to activate system protection
• PWR_DN# setting for the Power down mode
• Warning signal pop-up in application software
2.3 Power Good
• Issue RESET# outputs as the Power Good signal when 3V and 5V rise across a reset threshold.
2.4 General
• I²C^TM serial bus interface
• Intel^TM LDCM (DMI driver 2.0) support
• Acer^TM ADM (DMI driver 2.0) support
• Winbond hardware monitoring application software (Hardware Doctor^TM ) support, for both
Windows 95/98
• Meet WfM 2.0 (Wired for Management) spec.
• 5V Vcc operation
2.5 Package
• 20-pin SSOP (209mil)


Application

These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Winbond customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Winbond for any damages resulting from such improper use or sales.

Pinout




Specifications

PARAMETER	RATING	UNIT
Power Supply Voltage	-0.5 to 7.0	V
Input Voltage	-0.5 to VDD+0.5	V
Operating Temperature	0 to +70
Storage Temperature	-55 to +150

Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the device.

Description

W83L784R/G is an evolving product of W83782D/G --- Winbond's most popular hardware status monitoring IC. Specifically designed for the Notebook system, W83L784R/G can be used to monitor several critical hardware parameters of the system, including power supply voltages, fan speeds, and temperatures, which are very important for a high-end Notebook system to work stably and properly.

An 8-bit analog-to-digital converter (ADC) is built inside W83L784R/G. The W83L784R/G can monitor 4 analog voltage inputs, 2 fan tachometer inputs, one on-chip internal temperature sensor and 2 remote temperature sensors. The remote temperature sensing can be performed by thermistors, or 2N3904 NPN-type transistors, or directly from Intel^TM Deschutes CPU thermal diode output. The W83L784R/G provides 2 PWM (pulse width modulation) outputs for the fan speed control to support the"Thermal Cruise^TM"system, which can maintain the CPU or system in the specific programmable temperature under the hardware control. Another Fan speed control mode is"Speed Cruise"to keep the fan operating in the specific RPM. On the other hand, the W83L784R/G provides low active outputs such as fan fault and Battery low which could issue the hardware warning signals when the fan speed or battery voltage drop out of the preset range. Also the W83L784R/G provides power good reset for 3V and 5V; power down mode for power saving; fault pin for necessary H/W shutdown control; SMI#, OVT#, GPO# signals for system protection events; I²C^TM serial bus interface.

Through the application software or BIOS, the users can read all the monitored parameters of system from time to time. And a pop-up warning can be also activated when the monitored item was out of the proper/preset range. The application software could be Winbond's Hardware Doctor^TM, or Intel^TM LDCM (LanDesk Client Management), or other management application software. Also the users can set up the upper and lower limits (alarm thresholds) of these monitored parameters and to activate one programmable and maskable interrupts. For the spacing saving consideration of the Notebook system, W83L784R/G is in the package of 209mil 20pins-SSOP.

Parameters:

Technical/Catalog Information	W83L784G
Vendor	Nuvoton Technology Corporation of America
Category	Integrated Circuits (ICs)
Voltage - Supply	*
Package / Case	20-SSOP
Packaging	Tube
Output Type	*
Sensing Temperature	*
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	W83L784G W83L784G