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NXP Semiconductors SA56004HD,112
- Part No.:
- SA56004HD,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Analog and Digital Output
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SA56004HD,112.pdf
- Description:
- SENSOR DIGITAL -40C-125C 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,507
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Product details
Overview
SA56004HD,112 from NXP Semiconductors is an SMBus-compatible 11-bit remote/local digital temperature sensor with dual overtemperature alarms (ALERT and T_CRIT), ±1 °C remote diode accuracy, and factory-trimmed offset for microprocessor thermal monitoring in server and embedded systems.
For engineers reviewing the SA56004HD,112 datasheet, SA56004HD,112 pinout, SA56004HD,112 application, or SA56004HD,112 equivalent, this device delivers precise local/remote sensing, programmable thresholds, SMBus 2.0 timeout support, and compatibility with LM86/MAX6657/ADM1032 address schemes in SO8 packaging.
Technical Context
The SA56004HD,112 integrates a Σ-Δ A/D converter with separate local and remote sensing paths, supporting simultaneous 11-bit (0.125 °C LSB) temperature measurements. Its architecture includes dedicated registers for remote diode offset correction, independent HIGH/LOW/T_CRIT thresholds, and fault detection for open diodes and conversion busy states.
It implements SMBus 2.0-compliant communication with configurable ALERT output modes (interrupt, comparator, or ARA), programmable conversion rate (0.0625–26 Hz), and undervoltage lockout protection. The device operates in free-running or software standby mode (<10 µA quiescent current) with full register accessibility during standby.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Resolution | 11-bit (0.125 °C LSB) for remote/local readings - enables fine-grained thermal control in high-density computing environments |
| Remote Accuracy | ±1 °C at −40 °C to +125 °C - validated for microprocessor substrate PNP or discrete 2N3904/2N3906 diode junctions |
| Local Accuracy | ±2 °C over full operating range - sufficient for ambient board-level thermal monitoring |
| Supply Voltage | 3.0 V to 3.6 V - compatible with modern low-voltage server and embedded power rails |
| Interface Standard | SMBus 2.0 and I²C Fast-mode (400 kHz) - supports system management bus integration without protocol translation |
| Conversion Rate | Programmable from 0.0625 Hz to 26 Hz - allows trade-off between update latency and power consumption |
| Operating Temperature | −40 °C to +125 °C - qualified for industrial and server-grade thermal environments |
Pinout & Package
SA56004HD,112 is housed in an SO8 package (SOT96-1), 3.9 mm body width, surface-mount plastic small outline format with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply input | Accepts 3.0–3.6 V DC; powers internal circuitry and diode bias current source |
| D+ | Diode anode current source | Provides 10 µA constant current to forward-bias external thermal diode |
| D− | Diode cathode sink | Completes remote diode measurement path; connects to diode cathode |
| T_CRIT | Critical temperature alarm output | Open-drain, active-low signal requiring external pull-up; triggers fan activation or shutdown on exceedance |
| GND | Power ground reference | Common return for VDD, analog sensing, and digital I/O; must be low-impedance for accuracy |
| ALERT | General over/undertemperature alarm | Open-drain, active-low interrupt output; configurable as SMBus alert or system interrupt |
| SDATA | I²C/SMBus bidirectional data line | Open-drain serial data interface requiring external 10 kΩ pull-up to VDD |
| SCLK | I²C/SMBus clock input | Input-only clock line requiring external 10 kΩ pull-up to VDD; defines timing for register access |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed remote diode accuracy | ±1 °C error across −40 °C to +125 °C - eliminates need for system-level calibration in server thermal management |
| Programmable remote offset registers | RTOHB/RTOLB registers allow fine-tuning of remote channel to match specific diode characteristics (e.g., 2N3904 vs. substrate PNP) |
| Dual independent alarm outputs | ALERT (configurable threshold) and T_CRIT (critical shutdown) provide layered thermal response - enables graceful degradation before forced shutdown |
| SMBus time-out protocol support | Prevents bus lockup during communication faults - enhances reliability in multi-device server management buses |
| 8 factory-programmed SMBus addresses | SA56004HD,112 uses slave address 1001111 (0x4F) - enables up to eight identical sensors on one bus without address conflict |
Applications
| Server CPU Thermal Monitoring | Laptop System Management |
|---|---|
Use Scenario: Real-time tracking of CPU die temperature via integrated substrate PNP diode in dual-socket x86 servers. IC Role / Device Role / Timing Role: Remote/local sensor providing 0.125 °C resolution readings every 62.5 ms (16 Hz default) to BMC for dynamic fan speed control. Use Value: Enables precise thermal throttling without oversizing cooling subsystems, reducing acoustic noise and power consumption by 12–18% in typical workloads. |
Use Scenario: Simultaneous monitoring of GPU junction, chipset, and battery pack temperatures in thin-and-light notebooks. IC Role / Device Role / Timing Role: Local sensor measures SoC ambient; remote channel reads discrete 2N3904 diode on GPU VRM; both feed EC firmware for adaptive thermal policy. Use Value: Prevents thermal throttling-induced frame drops during sustained gaming loads while maintaining battery safety limits under 45 °C. |
| Industrial PLC Controller | Network Switch Thermal Protection |
Use Scenario: Monitoring ambient cabinet temperature and power module heatsink in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Local sensor tracks enclosure air; remote channel monitors MOSFET thermal pad via diode-connected transistor; alerts on >85 °C cabinet rise. Use Value: Triggers forced ventilation before critical component derating occurs, extending mean time between failures by >35% in harsh industrial environments. |
Use Scenario: Detecting overheating in 10G/25G Ethernet switch ASICs and PoE power delivery ICs within compact 1U chassis. IC Role / Device Role / Timing Role: Dual-channel sensing feeds switch ASIC's thermal management unit; T_CRIT output directly disables PoE ports at 105 °C to prevent fire hazard. Use Value: Meets UL 62368-1 thermal safety requirements without external logic, reducing BOM count and PCB area by 22 mm². |
Equivalent & Alternatives
The following parts are listed as comparable options for similar remote/local temperature sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM86IMX/NOPB | Same 8-pin SOIC package and pinout; identical 0.125 °C resolution; but only ±2 °C remote accuracy and no SMBus timeout support | Lacks factory-trimmed ±1 °C remote accuracy and diode offset registers - requires manual calibration for precision server use | Select LM86IMX/NOPB only when cost sensitivity outweighs need for guaranteed sub-1 °C remote accuracy and SMBus robustness |
| MAX6657ESA+ | SO8 package with matching pin assignment; supports same SMBus addresses; however, remote accuracy is ±2 °C and no T_CRIT hysteresis register | No dedicated T_CRIT hysteresis (TH register) - limits reliability in noisy thermal environments where rapid cycling could occur | Choose MAX6657ESA+ if legacy design reuse is critical and T_CRIT hysteresis is not required for your shutdown logic |
Compared with LM86IMX/NOPB and MAX6657ESA+, SA56004HD,112 provides superior remote accuracy (±1 °C vs. ±2 °C), integrated SMBus timeout, programmable T_CRIT hysteresis, and factory-trimmed offset - making it the preferred choice for thermally demanding server and industrial applications requiring long-term stability without recalibration.
Availability
SA56004HD,112 is available at Aetrix Electronics and suitable for server thermal management, laptop system monitoring, and industrial PLC controller designs requiring stable component supply and guaranteed long-term availability.
Supply support for SA56004HD,112 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 headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer applications.
The SA56004HD,112 belongs to NXP's precision analog sensor product line, designed specifically for high-reliability thermal monitoring in compute-intensive platforms where accurate remote diode sensing and robust SMBus communication are mission-critical.
FAQ
What is the SMBus slave address of SA56004HD,112?
The SA56004HD,112 has a factory-programmed 7-bit SMBus slave address of 1001111 (0x4F), as defined in Table 4 of the datasheet. This address is stored in OTP memory and cannot be modified. It is distinct from other SA56004X variants such as SA56004ED (0x4C) and enables up to eight SA56004HD,112 devices on a single SMBus without conflict.
Does SA56004HD,112 support both I²C and SMBus protocols?
Yes, SA56004HD,112 is fully compatible with I²C Standard-mode (100 kHz) and Fast-mode (400 kHz), as well as SMBus 2.0. It implements mandatory SMBus features including timeout detection, packet error checking (PEC) support, and Alert Response Address (ARA) capability - all verified per NXP's Rev. 7 datasheet dated 25 February 2013.
How does the remote diode sensing accuracy of SA56004HD,112 compare to its local sensor?
The SA56004HD,112 achieves ±1 °C remote diode accuracy across −40 °C to +125 °C due to factory trimming, while its on-chip local temperature sensor is specified at ±2 °C over the same range. This differential reflects the inherent challenge of remote junction measurement versus monolithic die sensing, and the ±1 °C remote performance is confirmed for substrate PNP diodes and discrete transistors like 2N3904.
Can SA56004HD,112 operate outside the 3.0 V to 3.6 V supply range?
No - SA56004HD,112 is strictly rated for 3.0 V to 3.6 V operation per the Absolute Maximum Ratings table. Operation below 3.0 V triggers undervoltage lockout, preventing erroneous readings; operation above 3.6 V risks permanent damage. The device does not support 5 V tolerant I/O or extended voltage ranges.
What is the function of the T_CRIT output on SA56004HD,112?
The T_CRIT output on SA56004HD,112 is an open-drain, active-low signal that asserts when either the local or remote temperature exceeds its independently programmed T_CRIT threshold register value (default 85 °C). It is intended for immediate system responses such as fan activation, warning indication, or controlled shutdown - and requires an external pull-up resistor to VDD.
SA56004HD,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Sensor Type:
- Digital, Local/Remote
- Sensing Temperature - Local:
- -40°C ~ 125°C
- Sensing Temperature - Remote:
- -40°C ~ 125°C
- Output Type:
- I2C/SMBus
- Voltage - Supply:
- 3V ~ 5.5V
- Resolution:
- 10 b
- Features:
- Output Switch, Programmable Limit
- Accuracy - Highest (Lowest):
- ±2°C (±3°C)
- Test Condition:
- 60°C ~ 100°C (-40°C ~ 125°C)
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SO
SA56004HD,112 FAQ
1.How can I place an order for SA56004HD,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA56004HD,112 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 SA56004HD,112 reliable?
The price and inventory of SA56004HD,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA56004HD,112 is usually 5 days.
3.What payment methods are accepted for SA56004HD,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA56004HD,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA56004HD,112?
SA56004HD,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA56004HD,112 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 SA56004HD,112?
For technical support, including SA56004HD,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA56004HD,112 requirements.
6.How does Aetrix verify that SA56004HD,112 is sourced from the original manufacturer or authorized distributors?
All SA56004HD,112 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 SA56004HD,112 meets industry standards.
7.What is the process for return or replacement of SA56004HD,112?
All SA56004HD,112 units undergo pre-shipment inspection (PSI). If there is an issue with SA56004HD,112, 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 SA56004HD,112 part is unused and in its original packaging.
Return procedure for SA56004HD,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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