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NXP Semiconductors NE1619DS,118
- Part No.:
- NE1619DS,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Thermal Management
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
NE1619DS,118.pdf
- Description:
- IC TEMP MONITOR 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,907
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Product details
Overview
NE1619DS,118 from NXP Semiconductors (formerly Philips) is a dedicated SMBus-compatible temperature and voltage monitor IC for microprocessor-based systems. It integrates local/remote temperature sensing (±2 °C local, ±3 °C remote), six analog voltage inputs (12 V, 5 V, 3.3 V, 2.5 V, VCCP, VDD), VID0–VID4 digital processor ID inputs, and programmable alarm limits - all in a 16-pin SSOP package. It serves as the hardware health monitor in desktop and notebook motherboard power management subsystems.
For engineers reviewing the NE1619DS,118 datasheet, NE1619DS,118 pinout, NE1619DS,118 application, or NE1619DS,118 equivalent, this page delivers verified functional scope, register-mapped SMBus interface behavior, thermal/voltage accuracy boundaries, reset pulse timing (≥20 ms), and Intel Heceta4 specification compliance - critical for BIOS integration, thermal throttling logic, and multi-rail supply validation.
Technical Context
The NE1619DS,118 implements a sigma-delta A-to-D converter with sequential scanning across eight measurement channels: remote diode, on-die local sensor, VDD, 12VIN, 5VIN, 3.3VIN, 2.5VIN, and VCCPVIN - completing full-cycle conversions in 0.25–0.50 s. All temperature data is stored in 8-bit two's complement format (1 °C resolution); voltage readings use 8-bit straight binary with LSB = nominal voltage / 192 (e.g., 3.3 V → 17.2 mV/LSB).
Its SMBus 2.0-compliant interface supports Write Byte, Read Byte, and Receive Byte protocols at up to 400 kHz clock rate. Slave address is hardware-configurable via A0/RESET/NTEST_OUT (pin 16) for dual-device bus addressing. VID inputs are sampled into dedicated registers (VID, VID4), while limit comparisons drive status bits in SR1/SR2 - enabling real-time fault flagging without host polling overhead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.8 V to 5.5 V - supports direct connection to 3.3 V standby rail (VDD/3.3VSB) for low-power monitoring. |
| Local Temp Accuracy | ±2 °C at 25 °C - enables reliable CPU die-adjacent thermal margining without calibration. |
| Remote Temp Accuracy | ±3 °C at 25 °C - validated for Pentium/PRO PNP transistor or 2N3904 discrete diode sensors. |
| VIN Measurement Accuracy | ±2% of full scale - ensures detection of 5% overvoltage/undervoltage on 12 V, 5 V, 3.3 V, 2.5 V, VCCP rails. |
| SMBus Clock Max | 400 kHz - compatible with standard system management controller timing budgets. |
| Reset Pulse Width | ≥20 ms low pulse - meets ATX specification minimum reset assertion time for x86 platforms. |
| Operating Temp Range | 0 °C to +125 °C - qualified for under-chassis motherboard placement near VRMs and CPUs. |
Pinout & Package
Package: 16-lead plastic shrink small outline package (SSOP16/QSOP), 3.9 mm body width, 0.635 mm lead pitch (SOT519-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SDA) | SMBus bidirectional data line | Open-drain I/O requiring external 10 kΩ pull-up; handles command/data transfer per SMBus protocol. |
| 2 (SCL) | SMBus clock input | Accepts up to 400 kHz clock; synchronizes all register reads/writes and conversion triggers. |
| 4 (VDD/3.3VSB) | Power supply & VDD monitor input | Supplies IC core and provides analog input for 3.3 V standby rail monitoring simultaneously. |
| 9 (D–/NTEST_IN) | Remote sensor negative terminal / test mode enable | Held high at power-up to enter NAND-tree connectivity test; otherwise connects to diode cathode. |
| 10 (D+) | Remote sensor positive terminal | Connects to diode anode; forms differential pair with D– for ΔVBE-based temperature calculation. |
| 11 (12VIN/VID4) | Configurable analog/digital input | Default: 12 V analog monitor; programmable via CR bit 5 to read VID4 from Pentium/PRO processors. |
| 16 (A0/RESET/NTEST_OUT) | Address select / reset output / test output | At power-up: sets LSB of 7-bit SMBus address; when RESET ENABLE=1, outputs ≥20 ms open-drain low pulse. |
Key Features
| Feature | Design Value |
|---|---|
| Intel Heceta4 Specification Compliance | Fully implements reference design requirements for Pentium/PRO platform thermal and voltage supervision - including VID decoding, SMBus register map, and reset timing. |
| Dual Temperature Sensing Architecture | On-die local sensor + external diode interface (D+/D–) enables simultaneous CPU junction and VRM hotspot monitoring with independent alarm thresholds. |
| Programmable Alarm Limits per Channel | Separate high/low limit registers for each temperature and voltage channel allow custom trip points aligned to board-specific thermal derating curves. |
| No Calibration Required | Factory-trimmed A-to-D converter and sensor offsets eliminate production-line calibration steps - reducing test time and BOM cost. |
| Diode Fault Detection | Automatic open/short detection on D+/D– pins (flagged in SR2 bit 6) prevents false thermal shutdown during sensor disconnection or solder defects. |
Applications
| Desktop Motherboard Thermal Management | Notebook Platform Power Health Monitoring |
|---|---|
Use Scenario: Real-time tracking of CPU die temperature (via on-die sensor) and VRM FET temperature (via remote diode on MOSFET package) during sustained load. IC Role / Device Role / Timing Role: Primary hardware monitor IC interfacing directly with southbridge SMBus controller; initiates thermal throttle signals and logs overtemperature events to EC firmware. Use Value: Enables dynamic fan speed control and CPU frequency scaling based on validated ±2 °C local and ±3 °C remote readings - preventing thermal runaway without software polling latency. | Use Scenario: Simultaneous monitoring of 3.3 V, 5 V, 12 V, and VCCP rails powering CPU, chipset, and display subsystems in space-constrained laptop designs. IC Role / Device Role / Timing Role: Centralized voltage supervisor providing fault flags to embedded controller (EC) via SMBus; triggers immediate shutdown on 12 V overvoltage (>13.2 V) or VCCP undervoltage (<2.14 V). Use Value: Achieves ±2% full-scale accuracy across six rails using single IC - eliminating need for discrete voltage comparators and reducing PCB area by >30%. |
| Industrial Controller Hardware Watchdog | Telecom Line Card Supply Integrity |
Use Scenario: Continuous supervision of ambient temperature and 5 V/3.3 V system rails in DIN-rail mounted PLCs operating from –20 °C to +70 °C ambient. IC Role / Device Role / Timing Role: Standby-mode supervisor (100 µA typical) that wakes host MCU only upon alarm condition; maintains watchdog timer reset capability via RESET pin. Use Value: Guarantees 0.25–0.50 s full-cycle monitoring even at 2.8 V supply - ensuring fail-safe operation during brownout conditions common in factory floor power distribution. | Use Scenario: Monitoring +12 V bias supply and +3.3 V logic rail for optical transceiver modules in carrier-grade Ethernet switches. IC Role / Device Role / Timing Role: Dedicated voltage integrity checker feeding status to service processor; reports faults via IPMI over SMBus for remote diagnostics. Use Value: Detects 12 V rail droop below 11.4 V (±2% FS) before SERDES lock loss occurs - enabling proactive module replacement before service interruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature and voltage monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADM1027ASTZ | Higher accuracy (±1 °C local, ±2 °C remote), integrated fan control PWM output, but no VID support. | Lacks Pentium/PRO VID decoding; requires external logic for CPU voltage ID capture. | Select when precise thermal margining outweighs VID compatibility - e.g., non-x86 industrial controllers. |
| LM95235CIMM | Supports dual remote diodes, higher SMBus speed (up to 1 MHz), but only four voltage inputs (no 12 V or VCCP). | Cannot monitor 12 V or processor-specific VCCP rail - unsuitable for full ATX platform coverage. | Choose for dual-sensor thermal mapping in compact embedded systems where 12 V/VCCP monitoring is unnecessary. |
Compared with ADM1027ASTZ and LM95235CIMM, the NE1619DS,118 uniquely combines Intel Heceta4 VID decoding, six-rail voltage monitoring (including 12 V and VCCP), and SMBus-addressable reset output - making it the only drop-in solution for legacy Pentium/PRO-based motherboard designs requiring full specification compliance.
Availability
NE1619DS,118 is available at Aetrix Electronics and suitable for desktop motherboards, notebook platforms, industrial controllers, and telecom line cards requiring stable component supply across extended product lifecycles.
Supply support for NE1619DS,118 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor company formed from the spin-off of Philips Semiconductors in 2006, specializing in secure connectivity solutions for automotive, industrial, and consumer applications.
The NE1619DS,118 belongs to NXP's legacy system management IC portfolio, designed specifically for Intel-platform hardware monitoring - delivering integrated thermal/voltage supervision with SMBus interface and Heceta4 specification alignment.
FAQ
What is the SMBus slave address configuration method for NE1619DS,118?
The NE1619DS,118 uses pin 16 (A0/RESET/NTEST_OUT) to set the LSB of its 7-bit SMBus slave address at power-up. When tied to GND, the address is 0x2C (0101100); when tied to VDD, it is 0x2D (0101101). This hardware-selectable addressing allows two NE1619DS,118 devices on the same SMBus without address conflict - essential for dual-CPU or redundant monitoring configurations. The address is latched only at power-on and remains fixed during operation.
Does NE1619DS,118 require external calibration for temperature measurements?
No, the NE1619DS,118 does not require external calibration. Its on-die temperature sensor and sigma-delta A-to-D converter are factory-trimmed to deliver ±2 °C local and ±3 °C remote accuracy across 0 °C to +125 °C. The device uses ΔVBE methodology with matched current sources (10 µA/100 µA) for remote diode sensing, and all offset/gain errors are compensated internally - enabling plug-and-play deployment in production systems without calibration fixtures or firmware compensation tables.
How does NE1619DS,118 handle remote diode fault detection?
The NE1619DS,118 performs automatic open-circuit and short-circuit detection on the D+ and D– pins during each remote temperature conversion cycle. If either condition is detected, bit 6 of Status Register 2 (SR2) is set to '1', indicating a diode fault. This flag persists until cleared by host software reading SR2. The detection logic validates voltage levels and current sink behavior - preventing false thermal alarms due to disconnected sensors or solder joint failures. This feature is enabled by default and requires no configuration.
Can NE1619DS,118 monitor both 12 V and VID4 simultaneously?
No, NE1619DS,118 cannot monitor 12 V and VID4 simultaneously because pin 11 (12VIN/VID4) is functionally multiplexed. At power-up, it defaults to 12 V analog input. To read VID4, bit 5 (12VIN/VID4 SELECT) in the Configuration Register (CR) must be set to '1', which reconfigures pin 11 as a digital VID4 input - disabling 12 V monitoring. This trade-off is documented in Table 5 and Section 12 of the datasheet, and reflects the Intel Heceta4 specification's requirement for optional VID4 support in Pentium/PRO systems.
What is the minimum reset pulse width generated by NE1619DS,118?
The NE1619DS,118 generates a minimum 20 ms low-state pulse on pin 16 (A0/RESET/NTEST_OUT) when the RESET bit (bit 4) in the Configuration Register is toggled from 0 to 1 and the RESET ENABLE bit (bit 7 in VID register) is set to '1'. This pulse width is guaranteed across the full operating temperature range (0 °C to +125 °C) and supply voltage range (2.8 V to 5.5 V), meeting ATX specification requirements for x86 platform reset assertion. An external 100 kΩ pull-up resistor is required for proper open-drain output operation.
NE1619DS,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Temp Monitoring System (Sensor)
- Sensor Type:
- Internal and External
- Sensing Temperature:
- 0°C ~ 125°C, External Sensor
- Accuracy:
- ±3°C Local(Max), ±5°C Remote(Max)
- Topology:
- ADC, Multiplexer, Register Bank
- Output Type:
- SMBus
- Output Alarm:
- Yes
- Output Fan:
- No
- Voltage - Supply:
- 2.8V ~ 5.5V
- Operating Temperature:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
NE1619DS,118 FAQ
1.How can I place an order for NE1619DS,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for NE1619DS,118 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for NE1619DS,118 reliable?
The price and inventory of NE1619DS,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NE1619DS,118 is usually 5 days.
3.What payment methods are accepted for NE1619DS,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NE1619DS,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NE1619DS,118?
NE1619DS,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NE1619DS,118 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for NE1619DS,118?
For technical support, including NE1619DS,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NE1619DS,118 requirements.
6.How does Aetrix verify that NE1619DS,118 is sourced from the original manufacturer or authorized distributors?
All NE1619DS,118 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that NE1619DS,118 meets industry standards.
7.What is the process for return or replacement of NE1619DS,118?
All NE1619DS,118 units undergo pre-shipment inspection (PSI). If there is an issue with NE1619DS,118, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The NE1619DS,118 part is unused and in its original packaging.
Return procedure for NE1619DS,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NE1619DS,118 Tags
-
EMC2101-ACZL-TR
Microchip Technology
-
MCP9844T-BE/MNY
Microchip Technology
-
EMC2101-R-ACZL-TR
Microchip Technology
-
MCP98244T-BE/MNY
Microchip Technology
-
TC670ECHTR
Microchip Technology
-
SE98ATP,547
NXP Semiconductors
-
AMC6821SDBQR
Texas Instruments
-
MAX6604AATA+T
Analog Devices Inc./Maxim Integrated
-
ADT7475ARQZ-REEL
onsemi
-
MAX6643LBBAEE+
Analog Devices Inc./Maxim Integrated
-
MAX6684ESA+T
Analog Devices Inc./Maxim Integrated
-
MAX6639AEE+
Analog Devices Inc./Maxim Integrated
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