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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Thermal Management

Texas Instruments LM96080CIMTX/NOPB

Name: LM96080CIMTX/NOPB
Brand: Texas Instruments
SKU: LM96080CIMTX/NOPB
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LM96080CIMTX/NOPB

Manufacturer:: Texas Instruments

Category:: Thermal Management

Package:: 24-TSSOP (0.173", 4.40mm Width)

Datasheet:: LM96080CIMTX/NOPB.pdf

Description:: IC HARDWARE MONITOR 24-TSSOP

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Product details

Overview

LM96080CIMTX/NOPB from Texas Instruments is a system hardware monitor IC with integrated 10-bit delta-sigma ADC, local temperature sensing (±3°C accuracy), seven 0–2.56V analog voltage inputs (2.5 mV LSB), two fan speed monitoring inputs, chassis intrusion detection, and I²C-compatible serial interface. It performs WATCHDOG limit comparisons across all monitored parameters and drives interrupt outputs for thermal, voltage, or fan fault events in server and communications infrastructure systems.

For engineers reviewing the LM96080CIMTX/NOPB datasheet, LM96080CIMTX/NOPB pinout, LM96080CIMTX/NOPB application, or LM96080CIMTX/NOPB equivalent, key selection considerations include its 24-pin TSSOP package, −40°C to +125°C operating range, software- and pin-compatibility with LM80, programmable RST_OUT/OS output, and support for Standard (100 kbps) and Fast Mode (400 kbps) I²C operation.

Technical Context

The LM96080CIMTX/NOPB implements a dedicated delta-sigma ADC architecture with 10-bit resolution and 2.5 mV LSB over 0–2.56V full-scale input range, enabling precise measurement of multiple DC power rails. Its internal WATCHDOG sequencer continuously compares all monitored values-including local temperature (0.0625°C resolution), seven analog voltages, and two fan tachometer counts-against user-programmable upper/lower limits stored in dedicated limit registers.

It features dual interrupt outputs: INT (fully maskable, supports multiple event sources including BTI and GPI) and RST_OUT/OS (dedicated to overtemperature shutdown). The device includes analog filtering on SDA/SCL lines, TIMEOUT reset capability to prevent I²C bus lockup, and three address pins (A0–A2) supporting up to eight devices on one bus.

Key Specifications

Parameter	Value and Actual Design Meaning
ADC Resolution	10 bits with 2.5 mV LSB over 0–2.56 V full-scale range - enables accurate DC rail monitoring at millivolt-level granularity.
Temperature Accuracy	±3°C max over −40°C to +125°C - meets industrial-grade thermal monitoring requirements for server and telecom equipment.
Fan Input Support	2 digital tachometer inputs with programmable divisors (1–4) - supports nominal fan speeds from 1100 RPM to 8800 RPM using 8-bit counter.
I²C Interface	Standard Mode (100 kbps) and Fast Mode (400 kbps) compatible - ensures interoperability with legacy and high-speed host controllers.
Supply Voltage Range	+3.0 V to +5.5 V - allows direct integration into 3.3 V and 5 V system power domains without level-shifting.
Operating Temperature	−40°C ≤ TA ≤ +125°C - qualified for harsh environments including base station electronics and industrial servers.
Shutdown Current	0.33 mA typical at 3.8 V - minimizes standby power in thermally managed systems during idle states.

Pinout & Package

LM96080CIMTX/NOPB is housed in a 24-pin TSSOP (PW) package with exposed thermal pad (not electrically connected), optimized for compact PCB layouts and thermal dissipation in dense server motherboard designs.

Pin/Terminal	Circuit Role	Design Meaning
1 INT_IN	Active-low interrupt input	Propagates external interrupt signals directly to INT output; used for cascading watchdog alerts from other subsystems.
2 SDA	I²C bidirectional data line	NMOS open-drain output with internal ESD clamp; requires external pull-up for standard/fast-mode I²C communication.
3 SCL	I²C clock input	Digital input with hysteresis (0.67 V at 3.3 V); supports TIMEOUT reset function to recover from bus lockup.
4–5 FAN1, FAN2	Fan tachometer pulse inputs	Digital inputs with programmable edge sensitivity; measure period of fan pulses to derive RPM with ±10% error over full temp range.
6 BTI	Board temperature interrupt input	Accepts active-high O.S. outputs from external digital temperature sensors (e.g., LM75, LM73) to extend thermal monitoring coverage.
7 GPI (CI)	General-purpose input / chassis intrusion	Latches active-high signal from mechanical switch or security circuit; triggers interrupt on cover removal or tamper event.
8 GND	Digital ground reference	Internally connects to all digital logic; must be tied to system digital ground plane for noise immunity.
9 V+	Power supply input	Accepts 3.0–5.5 V; requires parallel 10 μF electrolytic + 0.1 μF ceramic bypass for stable ADC and fan counter operation.
10 INT	Maskable interrupt output	NMOS open-drain output; asserts low when any WATCHDOG limit violation occurs (voltage, temp, fan, or GPI/BTI event).
11 GPO	General-purpose output	NMOS open-drain output; typically drives external PMOS for software-controlled power sequencing or fan enable/disable.
12 NTEST_IN/RESET_IN	Connectivity test / reset input	Active-low input that forces power-on reset state; enables NAND tree board-level testing during manufacturing.
13 RST_OUT/OS	Reset output / overtemperature shutdown	PMOS open-drain (RST_OUT) or NMOS open-drain (OS) selectable via register; provides master reset or thermal shutdown signal.
14 GNDA	Analog ground reference	Separate analog ground pin; must connect to low-noise analog ground plane to maintain ADC accuracy and minimize crosstalk.
15–21 IN6–IN0	Analog voltage inputs	Seven single-ended 0–2.56 V inputs; each internally multiplexed to delta-sigma ADC with 2 kΩ typical on-resistance.
22 A0/NTEST_OUT	I²C address bit 0 / test output	Configures LSB of I²C slave address (default 0x20–0x27); outputs test signal during NAND tree connectivity verification.
23–24 A1–A2	I²C address bits 1–2	Set MSBs of I²C slave address; allow up to eight LM96080CIMTX/NOPB devices on same I²C bus without address conflict.

Key Features

Feature	Design Value
Delta-sigma ADC architecture	Delivers 10-bit precision with ±1% FS total unadjusted error and ±1 LSB differential non-linearity for reliable rail monitoring.
Programmable fan divisor	Supports four division ratios (1–4) to match tachometer pulse rates across diverse fan types - eliminates need for external scaling logic.
Chassis intrusion detection	Hardware-latched GPI input retains intrusion status until cleared by host firmware - enables secure tamper-evident logging in enterprise systems.
Thermal watchdog with hysteresis	OS output triggers at programmed overtemperature threshold and holds until temperature falls below hysteresis level - prevents thermal oscillation.
I²C bus robustness features	Analog filtering on SDA/SCL plus TIMEOUT reset function ensures reliable operation in electrically noisy server backplane environments.

Applications

Server Thermal Monitoring	Communications Power Rail Supervision
Use Scenario: Real-time monitoring of CPU/GPU core voltages, VRM outputs, and heatsink temperatures in 1U/2U rack servers. IC Role / Device Role / Timing Role: Central hardware monitor performing round-robin ADC conversions every 728 ms, comparing results against programmable thresholds, and asserting INT on violations. Use Value: Enables autonomous thermal throttling and graceful shutdown before component damage, reducing field failure rates in high-density compute deployments.	Use Scenario: Continuous supervision of +12 V, +5 V, +3.3 V, and +1.8 V power supplies in telecom line cards and baseband units. IC Role / Device Role / Timing Role: Measures seven analog inputs with 2.5 mV LSB resolution and reports deviations >±1% FS via I²C to host controller for fault logging. Use Value: Detects early-stage power supply drift or failure, allowing predictive maintenance and minimizing unplanned network outages.
Fan Speed Control in Storage Arrays	Industrial Chassis Security Monitoring
Use Scenario: RPM feedback and failure detection for redundant cooling fans in NAS enclosures and JBOD arrays. IC Role / Device Role / Timing Role: Counts tachometer pulses on FAN1/FAN2 with 8-bit resolution; calculates RPM using programmable divisor and reports count to host. Use Value: Identifies stalled or degraded fans before thermal runaway occurs, extending drive lifetime and maintaining RAID integrity.	Use Scenario: Tamper detection in industrial control cabinets housing PLCs or HMIs where physical access must be audited. IC Role / Device Role / Timing Role: GPI input latches chassis intrusion event; host reads status via I²C and logs timestamped alert to secure memory. Use Value: Provides hardware-enforced, non-volatile tamper evidence required for compliance with IEC 62443 and similar industrial security standards.

Server Thermal Monitoring

Communications Power Rail Supervision

Use Scenario: Real-time monitoring of CPU/GPU core voltages, VRM outputs, and heatsink temperatures in 1U/2U rack servers.

IC Role / Device Role / Timing Role: Central hardware monitor performing round-robin ADC conversions every 728 ms, comparing results against programmable thresholds, and asserting INT on violations.

Use Value: Enables autonomous thermal throttling and graceful shutdown before component damage, reducing field failure rates in high-density compute deployments.

Use Scenario: Continuous supervision of +12 V, +5 V, +3.3 V, and +1.8 V power supplies in telecom line cards and baseband units.

IC Role / Device Role / Timing Role: Measures seven analog inputs with 2.5 mV LSB resolution and reports deviations >±1% FS via I²C to host controller for fault logging.

Use Value: Detects early-stage power supply drift or failure, allowing predictive maintenance and minimizing unplanned network outages.

Fan Speed Control in Storage Arrays

Industrial Chassis Security Monitoring

Use Scenario: RPM feedback and failure detection for redundant cooling fans in NAS enclosures and JBOD arrays.

IC Role / Device Role / Timing Role: Counts tachometer pulses on FAN1/FAN2 with 8-bit resolution; calculates RPM using programmable divisor and reports count to host.

Use Value: Identifies stalled or degraded fans before thermal runaway occurs, extending drive lifetime and maintaining RAID integrity.

Use Scenario: Tamper detection in industrial control cabinets housing PLCs or HMIs where physical access must be audited.

IC Role / Device Role / Timing Role: GPI input latches chassis intrusion event; host reads status via I²C and logs timestamped alert to secure memory.

Use Value: Provides hardware-enforced, non-volatile tamper evidence required for compliance with IEC 62443 and similar industrial security standards.

Equivalent & Alternatives

The following parts are listed as comparable options for similar hardware monitoring applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM80CIMTX/NOPB	Predecessor with identical pinout and register map but lower temperature accuracy (±5°C vs. ±3°C) and no BTI input.	Lacks support for daisy-chained external temperature sensors; limited to local thermal monitoring only.	Select LM96080CIMTX/NOPB when extended thermal visibility via LM75/LM73 sensors is required.
ADM1027ASTZ-REEL	12-bit ADC, higher voltage accuracy (±0.8% FS), integrated remote diode sensing, but no chassis intrusion input or BTI.	Optimized for CPU thermal management with remote diode interface; lacks GPI and multi-sensor interrupt aggregation.	Choose ADM1027ASTZ-REEL for high-precision CPU die temperature tracking where chassis security is not needed.

Compared with LM80CIMTX/NOPB and ADM1027ASTZ-REEL, LM96080CIMTX/NOPB uniquely combines chassis intrusion latching, BTI-based multi-sensor thermal alerting, and full LM80 compatibility - making it optimal for cost-sensitive, space-constrained server and telecom platforms requiring broad hardware visibility.

Availability

LM96080CIMTX/NOPB is available at Aetrix Electronics and suitable for server thermal management, communications infrastructure power supervision, and industrial chassis security monitoring requiring stable component supply across long production lifecycles.

Supply support for LM96080CIMTX/NOPB 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

Texas Instruments is a global semiconductor leader delivering analog and embedded processing solutions, with deep expertise in precision sensing, power management, and industrial interface technologies.

The LM96080CIMTX/NOPB belongs to TI's System Hardware Monitor product line, designed specifically for real-time voltage, temperature, and fan health monitoring in mission-critical computing and communications equipment.

FAQ

What is the default I²C address of the LM96080CIMTX/NOPB?

The LM96080CIMTX/NOPB powers up with a default I²C slave address of 0x20 (binary 0100000), determined by A2=0, A1=0, A0=0. Address bits A0–A2 are hardwired or pulled to set one of eight possible addresses (0x20–0x27), enabling multiple LM96080CIMTX/NOPB devices on the same bus without conflict.

Does the LM96080CIMTX/NOPB support both local and remote temperature sensing?

The LM96080CIMTX/NOPB integrates a local silicon temperature sensor with ±3°C accuracy and 0.0625°C resolution. It does not include a built-in remote diode interface, but supports remote thermal monitoring via its BTI pin, which accepts overtemperature shutdown signals from external digital sensors like LM75 or LM73 connected on the same board.

How does the LM96080CIMTX/NOPB handle fan failure detection?

The LM96080CIMTX/NOPB monitors FAN1 and FAN2 as digital pulse inputs, measuring tachometer period to calculate RPM. Fan failure is detected when pulse frequency drops below programmable thresholds - indicated by full-scale count (255) or timeout. Failure mode can be configured as active-high or active-low via register settings, and interrupts are reported through INT or RST_OUT/OS outputs.

Can the LM96080CIMTX/NOPB operate from a 3.3 V supply?

Yes, the LM96080CIMTX/NOPB operates across a +3.0 V to +5.5 V supply range. At 3.3 V, typical operating current is 0.370 mA, and all I²C timing specifications (including 100 kbps Standard Mode and 400 kbps Fast Mode) remain fully compliant. Logic thresholds scale with V+, ensuring robust interface behavior.

What is the purpose of the GNDA pin on the LM96080CIMTX/NOPB?

GNDA is the dedicated analog ground reference for the LM96080CIMTX/NOPB's delta-sigma ADC and analog input multiplexer. It must be connected to a clean, low-noise analog ground plane - separate from digital ground (GND) - to preserve measurement accuracy and prevent coupling of digital switching noise into voltage and temperature readings.

LM96080CIMTX/NOPB Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 24-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: Hardware Monitor

Sensor Type:: Internal and External

Sensing Temperature:: -40°C ~ 125°C, External Sensor

Accuracy:: ±3°C(Max)

Topology:: ADC (Sigma Delta), Comparator, Fan Speed Counter, Register Bank

Output Type:: 2-Wire Serial, I2C

Output Alarm:: No

Output Fan:: Yes

Voltage - Supply:: 3V ~ 5.5V

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 24-TSSOP

LM96080CIMTX/NOPB FAQ

1.How can I place an order for LM96080CIMTX/NOPB through Aetrix?

Please submit a Request for Quotation (RFQ) for LM96080CIMTX/NOPB 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 LM96080CIMTX/NOPB reliable?

The price and inventory of LM96080CIMTX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM96080CIMTX/NOPB is usually 5 days.

3.What payment methods are accepted for LM96080CIMTX/NOPB?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM96080CIMTX/NOPB transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM96080CIMTX/NOPB?

LM96080CIMTX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM96080CIMTX/NOPB 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 LM96080CIMTX/NOPB?

For technical support, including LM96080CIMTX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM96080CIMTX/NOPB requirements.

6.How does Aetrix verify that LM96080CIMTX/NOPB is sourced from the original manufacturer or authorized distributors?

All LM96080CIMTX/NOPB 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 LM96080CIMTX/NOPB meets industry standards.

7.What is the process for return or replacement of LM96080CIMTX/NOPB?

All LM96080CIMTX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM96080CIMTX/NOPB, 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 LM96080CIMTX/NOPB part is unused and in its original packaging.

Return procedure for LM96080CIMTX/NOPB:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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