NE1619DS,112

Overview

The NE1619DS,112 is a temperature and voltage monitor designed for microprocessor-based systems. It features five analog inputs for supply voltages (12 V, 5 V, 3.3 V, 2.5 V, VCCP), a remote temperature sensor input, and an onboard local sensor. The device operates within a 2.8 V to 5.5 V supply range and communicates via an SMBus interface. Local temperature accuracy is ±2 °C at 25 °C, while remote accuracy is ±3 °C. Voltage measurement error is ±2% of full scale. It provides programmable alarm limits and a reset pulse output.

Feature Summary

• Monitors local and remote temperatures with integrated sigma-delta A-to-D conversion
• Measures multiple power supply rails including processor voltage ID codes
• Configurable high/low limit alarms with status flag reporting
• SMBus serial interface for system controller communication

Applications

• System thermal and hardware monitoring
• Desktop computer motherboards
• Notebook computer power management
• Industrial controllers
• Telecom equipment

Procurement Notes

Verify the specific ordering suffix DS indicates the SSOP16 package variant. Confirm compatibility with Intel Heceta 4 specifications if required by the design. Ensure the SMBus pull-up resistor values match the interface requirements for reliable communication with the host controller.

Selection Notes

Select this component when monitoring both local and remote thermal conditions alongside critical system voltages is required. The integrated VID inputs simplify processor voltage identification. Ensure the operating temperature range meets the environmental constraints of the target application.

Part Context

This device belongs to the Philips Semiconductors (now NXP) family of hardware monitors. It is compatible with Intel Heceta 4 reference designs. The part replaces older discrete monitoring solutions by integrating multiple sensing channels into a single IC.

Replacement Considerations

No direct public substitute part numbers are documented in the provided datasheet.

FAQ

How is the slave address determined?

The LSB bit of the 7-bit slave address is defined by the logic level on Pin 16 (A0) at power-up. Connecting it to GND or VDD selects one of two predefined addresses.

What format is used for temperature data?

Temperature readings are stored in 8-bit digital 2's complement format with a resolution of 1 °C.

Can the device generate a reset signal?

Yes, Pin 16 can be configured as a reset output that generates a minimum 20 ms low state pulse when triggered by the configuration register.