Product Details
Key Features
Applications/Uses
Sensor Type | Local |
# Channels | One |
Interface | 2-Wire/I2C/SMBus |
Functions | Fan Monitor Voltage Monitor |
Accuracy (±°C) | 2 |
Parasite Pwr. | No |
Temp. Thresh. | Programmable |
Temp. Resolution (bits) | 9 |
Oper. Temp. (°C) | -40 to +125 |
Package/Pins | TSSOP/24 |
Budgetary Price (See Notes) | $2.18 @1k |
Simplified Block Diagram
Technical Docs
Data Sheet | CPU Peripheral Monitor | Nov 19, 1999 | |
App Note | Understanding Multidrop Address Assignments for Thermal Sensors | ||
Tutorial | Thermal Management Handbook | ||
App Note | Package Thermal Resistance Values (Theta JA, Theta JC) for Temperature Sensors and 1-Wire Devices |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
Parameters
Sensor Type | Local |
# Channels | One |
Interface | 2-Wire/I2C/SMBus |
Functions | Fan Monitor Voltage Monitor |
Accuracy (±°C) | 2 |
Parasite Pwr. | No |
Temp. Thresh. | Programmable |
Temp. Resolution (bits) | 9 |
Oper. Temp. (°C) | -40 to +125 |
Package/Pins | TSSOP/24 |
Budgetary Price (See Notes) | $2.18 @1k |
Key Features
- ±2°C accuracy (from -25°C to +100°C) 9-bit digital thermometer
- Six 8-bit ADC channels for monitoring PC power supplies
- Two tachometer inputs
- 8-bit DAC for fan speed control
- Maskable system interrupt for all measured parameters (temperature, voltage, fan speed, intrusion detect)
- Limit settings are user-programmable
- Data is transferred over 2-wire/SMBus interface
- Two address inputs allow up to four DS1780 to operate on a single bus
- 2.8V to 5.75V operating range
- 24-pin 173mil TSSOP package (DS1780E)
Applications/Uses
- Computer Graphics Systems
- Industrial Instruments
- Notebook Computers
- Portable Terminals
- Storage Area Networks (SANs)
Description
The DS1780 can be reset to its default power-up state through a remote reset function that has internal debounce and delay. The DS1780 also features an interrupt function that can be programmed to become active should any of the monitored parameters fall out of spec. For board-level testability, an internal NAND TREE function simplifies system design, and a chassis intrusion input enhances system security.
Programming and data readout are accessed through a simple 2-wire interface with 2-bit addressability. The DS1780 power supply range of 2.8V to 5.75V allows parameter monitoring for 3V or 5V systems. The DS1780 is assembled in a 24-pin 173mil TSSOP package (DS1780E).
Technical Docs
Data Sheet | CPU Peripheral Monitor | Nov 19, 1999 | |
App Note | Understanding Multidrop Address Assignments for Thermal Sensors | ||
Tutorial | Thermal Management Handbook | ||
App Note | Package Thermal Resistance Values (Theta JA, Theta JC) for Temperature Sensors and 1-Wire Devices |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .