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Texas Instruments LM96063CISD/NOPB
- Part No.:
- LM96063CISD/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Thermal Management
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LM96063CISD/NOPB.pdf
- Description:
- IC DIODE/DGTL TEMP SENSOR 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:4,482
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Product details
Overview
LM96063CISD/NOPB from Texas Instruments is a remote diode digital temperature sensor with integrated PWM fan speed control, measuring local die temperature and remote diode temperature (e.g., MMBT3904 or processor thermal diodes) with ±0.75°C accuracy over +25°C to +85°C ambient and +50°C to +105°C diode range, 1/8°C resolution, and SMBus 2.0 interface - deployed in FPGA/ASIC thermal management systems.
For engineers reviewing the LM96063CISD/NOPB datasheet, LM96063CISD/NOPB pinout, LM96063CISD/NOPB application, or LM96063CISD/NOPB equivalent, key selection criteria include remote diode accuracy across SOI-based processors, 12-step programmable LUT for acoustic fan noise reduction, TACH input with Smart-Tach mode for PWM-driven fan RPM measurement, and TCRIT output for hardware thermal shutdown coordination.
Technical Context
The LM96063CISD/NOPB implements a ΔVBE-based sensing architecture with dual 10-bit plus sign ΔΣ ADCs - one for local die temperature and one for remote diode voltage - supporting TruTherm BJT beta compensation disable (power-on default), enabling precise measurement of thermal diodes on SOI processes like FPGAs and ASICs. Its digital filter enhances remote resolution to 1/32°C.
It integrates a fully programmable 12-step lookup table (LUT) with fine-resolution smoothing and ramping functions, driving an open-drain PWM output at 22.5 kHz with 0.39% duty cycle resolution. The TACH input supports Smart-Tach mode to reject corrupted pulses during PWM fan modulation, and dual ALERT/TCRIT outputs provide independent hardware-triggered thermal event signaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Remote Temp Accuracy | ±0.75°C max (TA = +25°C to +85°C, TD = +50°C to +105°C) - ensures reliable thermal throttling margin for SOI-based processors. |
| Local Temp Accuracy | ±3.0°C max (TA = +25°C to +125°C) - sufficient for ambient board-level thermal monitoring without self-heating correction. |
| Resolution | 1/8°C (0.125°C) remote, 1°C local - enables fine-grained fan speed transitions via LUT without oversampling overhead. |
| PWM Frequency | 22.5 kHz - avoids audible noise while maintaining compatibility with standard 4-pin DC brushless fans. |
| SMBus Interface | SMBus 2.0 compliant with TIMEOUT reset - ensures robust communication in multi-device server backplanes. |
| Supply Range | 3.0 V to 3.6 V - matches standard 3.3 V rail with 0.3 V tolerance, eliminating need for dedicated LDO. |
| Supply Current | 456 µA typical at 0.8 Hz conversion rate - enables low-power thermal monitoring in always-on system states. |
Pinout & Package
LM96063CISD/NOPB uses a 10-pin WSON package (DSC0010A, 3 mm × 3 mm, 0.5 mm pitch) with wettable flanks, optimized for thermal performance on 2- or 4-layer PCBs (θJA = 137°C/W or 40.3°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 TCRIT | Open-drain digital output | Hardware shutdown signal activated when remote temperature exceeds programmed critical limit - requires external pull-up; no software polling needed. |
| 2 VDD | Power supply input | +3.3 V ±0.3 V supply with mandatory 0.1 µF ceramic + 100 pF parallel bypass and local 10 µF bulk capacitance. |
| 3 D+ | Analog input | Anode connection to remote diode; sensitive to leakage - 100 pF capacitor recommended between D+ and D− for noise immunity. |
| 4 D− | Analog input | Cathode connection to remote diode; forward-bias protection required - parasitic diode D2 must not be biased >50 mV to avoid measurement corruption. |
| 5 PWM | Open-drain digital output | Direct-drive PWM output for 4-pin fans; power-on default low; supports 22.5 kHz switching with programmable duty cycle via LUT. |
| 6 GND | Ground return | Common analog/digital ground reference - must be low-impedance and star-connected near VDD bypass capacitors. |
| 7 ALERT | Open-drain digital output | Configurable interrupt/alert output for high/low/TCRIT limit violations - supports comparator, interrupt, or SMBus ARA modes. |
| 8 TACH | Digital input | Fan RPM measurement input; disabled at power-up - requires TCHEN bit set in Config Register 03h to enable Smart-Tach mode. |
| 9 SMBDAT | Bidirectional SMBus data | Open-drain SMBus data line - requires external pull-up; supports SMBus 2.0 timing including TIMEOUT reset (25–35 ms low pulse). |
| 10 SMBCLK | Digital input | SMBus clock input - accepts 10–100 kHz clock; rise/fall times ≤1 µs/0.3 µs ensure bus compliance. |
Key Features
| Feature | Design Value |
|---|---|
| 12-step programmable LUT | Enables non-linear fan speed vs. temperature curves to minimize acoustic noise while maintaining thermal safety margins. |
| Smart-Tach tachometer input | Rejects pulse distortion caused by PWM fan drive transistors - delivers accurate RPM measurement without external signal conditioning. |
| Dual hardware thermal outputs | Independent ALERT (configurable limit violation) and TCRIT (critical shutdown) pins allow tiered thermal response without host CPU intervention. |
| Remote diode digital filtering | IIR filter improves remote temperature resolution from 1/8°C to 1/32°C - reduces noise-induced fan hunting in electrically noisy environments. |
| TruTherm BJT beta compensation disable | Power-on default disables compensation - optimized for thermal diodes on SOI processes (FPGAs, ASICs), avoiding overcorrection errors. |
Applications
| Server CPU Thermal Management | Industrial FPGA Cooling Control |
|---|---|
Use Scenario: Monitoring Intel Xeon CPU thermal diode and adjusting 4-pin PWM fan speed in 1U rack servers. IC Role / Device Role / Timing Role: Remote diode sensor + PWM controller - provides closed-loop thermal regulation with hardware TCRIT shutdown at 95°C. Use Value: Eliminates need for separate fan controller IC; 22.5 kHz PWM prevents audible whine; Smart-Tach maintains RPM accuracy despite fan voltage modulation. | Use Scenario: Regulating cooling for Xilinx Kintex-7 FPGA in industrial PLC with wide ambient temperature range. IC Role / Device Role / Timing Role: Dual-sensor (local + remote) with SMBus interface - measures FPGA junction temp and board ambient to prevent thermal runaway. Use Value: ±0.75°C remote accuracy ensures safe operation within FPGA's 100°C TJMAX; LUT hysteresis prevents fan oscillation during transient loads. |
| Communications Baseband Unit | Medical Imaging ASIC Thermal Guard |
Use Scenario: Thermal supervision of Broadcom BCM542xx PHY ASIC in outdoor small cell base stations. IC Role / Device Role / Timing Role: Remote diode sensor with ALERT/TCRIT outputs - triggers forced air cooling and system throttling before ASIC derating begins. Use Value: SMBus TIMEOUT reset recovers bus lockups in EMI-heavy RF environments; 3.0–3.6 V supply matches baseband power domain. | Use Scenario: Protecting TI C6678 DSP-based ultrasound beamformer ASIC from overheating during sustained imaging bursts. IC Role / Device Role / Timing Role: Local + remote temperature monitor with critical shutdown - asserts TCRIT to halt processing if ASIC exceeds 85°C junction. Use Value: 1/32°C filtered resolution detects subtle thermal drift; TCRIT output drives hardware reset circuitry independent of firmware state. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar remote diode temperature sensing and fan control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM96163CISD/NOPB | TruTherm BJT beta compensation enabled at power-up - optimized for bulk CMOS thermal diodes (e.g., Intel Core i-series CPUs). | Required for accurate measurement of non-SOI processors; unsuitable for SOI-based FPGAs without calibration offset. | Select LM96163CISD/NOPB only when targeting thermal diodes on 22/45/65/90 nm bulk CMOS processes. |
| ADM1032ARMZ-REEL | Legacy 2-wire interface (not SMBus 2.0); no integrated PWM output; lacks Smart-Tach or LUT smoothing. | Requires external fan driver and microcontroller for closed-loop control; limited to basic thermal alerting. | Choose ADM1032ARMZ-REEL only for cost-sensitive, low-complexity designs without acoustic noise constraints. |
Compared with LM96063CISD/NOPB, LM96163CISD/NOPB adds automatic TruTherm compensation for bulk-CMOS diodes but sacrifices SOI optimization, while ADM1032ARMZ-REEL omits integrated fan control entirely - making LM96063CISD/NOPB the only option delivering full hardware-accelerated thermal management for SOI-based logic devices.
Availability
LM96063CISD/NOPB is available at Aetrix Electronics and suitable for server motherboard thermal management, industrial FPGA cooling control, communications infrastructure baseband units, and medical imaging ASIC thermal guard applications requiring stable component supply and long-term lifecycle support.
Supply support for LM96063CISD/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 U.S.-based semiconductor company specializing in analog and embedded processing technologies, with leadership in precision sensing, power management, and interface solutions.
The LM96063CISD/NOPB belongs to TI's thermal monitoring and fan control product line, designed specifically for hardware-accelerated thermal management of SOI-based processors, FPGAs, and ASICs in space-constrained, acoustically sensitive systems.
FAQ
What is the remote temperature accuracy specification for LM96063CISD/NOPB when monitoring an MMBT3904 transistor?
The LM96063CISD/NOPB achieves ±0.75°C maximum remote temperature error when measuring an MMBT3904 transistor over +25°C to +85°C ambient and +50°C to +105°C diode temperature ranges. This accuracy level is confirmed in the datasheet's DC Electrical Characteristics table under "Temperature Error Using an MMBT3904" and applies with TruTherm compensation disabled - the power-on default state optimized for SOI processes.
Does LM96063CISD/NOPB support hardware-based thermal shutdown without microcontroller intervention?
Yes, LM96063CISD/NOPB provides hardware-based thermal shutdown via its dedicated TCRIT output pin. When the measured remote temperature exceeds the user-programmed T_CRIT setpoint register value, the open-drain TCRIT pin pulls low immediately - independent of SMBus communication or host firmware. This allows direct connection to system reset or power sequencer circuits for fail-safe shutdown.
How does the Smart-Tach feature in LM96063CISD/NOPB improve fan RPM measurement reliability?
The Smart-Tach feature in LM96063CISD/NOPB compensates for pulse distortion caused by PWM-driven fan transistors. It dynamically adjusts sampling windows and validates tachometer edges to reject false counts - ensuring accurate RPM measurement even when the fan's power supply is being modulated. This eliminates the need for external RC filters or microcontroller-based debouncing logic.
Can LM96063CISD/NOPB drive a standard 4-pin PWM fan directly, and what is its PWM frequency?
Yes, LM96063CISD/NOPB drives standard 4-pin PWM fans directly via its open-drain PWM output pin. It operates at a fixed 22.5 kHz switching frequency - selected to avoid audible noise while maintaining compatibility with fan specifications. Duty cycle is controlled by the 12-step lookup table (LUT), with 0.39% resolution at this frequency.
What is the purpose of the OFFSET register in LM96063CISD/NOPB, and how is it used?
The OFFSET register in LM96063CISD/NOPB (comprising RTOHB and RTOLB bytes) allows software correction of remote temperature readings by adding or subtracting a fixed value - typically used to compensate for non-ideality factors or series resistance differences in thermal diodes not matching the Intel 45 nm reference. This adjustment is applied digitally before alarm comparisons or LUT indexing.
LM96063CISD/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Fan Control, Temp Monitor
- Sensor Type:
- Internal and External
- Sensing Temperature:
- 25°C ~ 125°C, External Temperature
- Accuracy:
- ±6°C Local(Max), ±3°C Remote(Max)
- Topology:
- ADC (Sigma Delta), Comparator, Fan Speed Counter, Register Bank
- Output Type:
- 2-Wire SMBus
- Output Alarm:
- Yes
- Output Fan:
- Yes
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-WSON (3x3)
LM96063CISD/NOPB FAQ
1.How can I place an order for LM96063CISD/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM96063CISD/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 LM96063CISD/NOPB reliable?
The price and inventory of LM96063CISD/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM96063CISD/NOPB is usually 5 days.
3.What payment methods are accepted for LM96063CISD/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM96063CISD/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM96063CISD/NOPB?
LM96063CISD/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM96063CISD/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 LM96063CISD/NOPB?
For technical support, including LM96063CISD/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM96063CISD/NOPB requirements.
6.How does Aetrix verify that LM96063CISD/NOPB is sourced from the original manufacturer or authorized distributors?
All LM96063CISD/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 LM96063CISD/NOPB meets industry standards.
7.What is the process for return or replacement of LM96063CISD/NOPB?
All LM96063CISD/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM96063CISD/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 LM96063CISD/NOPB part is unused and in its original packaging.
Return procedure for LM96063CISD/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM96063CISD/NOPB Tags
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