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NXP Semiconductors SA56004CD,112
- Part No.:
- SA56004CD,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Analog and Digital Output
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SA56004CD,112.pdf
- Description:
- SENSOR DIGITAL -40C-125C 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,285
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Product details
Overview
SA56004CD,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 programmable conversion rate from 0.0625 Hz to 26 Hz. It monitors microprocessor thermal diodes or discrete transistors (e.g., 2N3904/2N3906) in server motherboard thermal management systems.
For engineers reviewing the SA56004CD,112 datasheet, SA56004CD,112 pinout, SA56004CD,112 application, or SA56004CD,112 equivalent, this device supports precise thermal monitoring in multi-zone computing platforms where local + remote sensing, SMBus timeout compliance, and open-drain interrupt signaling are required.
Technical Context
The SA56004CD,112 integrates a 11-bit Σ-Δ A/D converter with separate local and remote sensing paths, factory-trimmed for ±1 °C remote accuracy using external diode junctions. Its dual alarm architecture uses independent status flags and open-drain outputs-ALERT for general out-of-range alerts and T_CRIT for critical shutdown triggers.
It implements SMBus 2.0 protocol compliance including TIMEOUT detection and ARA response capability, with I²C Standard- and Fast-mode compatibility. The device operates from 3.0 V to 3.6 V, includes undervoltage lockout, and supports eight factory-programmed slave addresses for multi-sensor bus configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Resolution | 0.125 °C (11-bit two's complement output for remote/local channels) |
| Remote Accuracy | ±1 °C at −40 °C to +125 °C (factory trimmed for diode-connected PNP/NPN transistors) |
| Local Accuracy | ±2 °C across full operating range |
| Supply Voltage | 3.0 V to 3.6 V (undervoltage lockout prevents erroneous readings) |
| Conversion Rate | Programmable from 0.0625 Hz to 26 Hz (default 16 Hz after power-on reset) |
| SMBus/I²C Interface | SMBus 2.0 compliant with TIMEOUT support; I²C Standard- and Fast-mode compatible |
| Operating Temperature | −40 °C to +125 °C ambient (full specification range) |
Pinout & Package
SA56004CD,112 is housed in an SO8 package (SOT96-1), 3.9 mm body width, surface-mount plastic small outline format.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply input | 3.0–3.6 V DC; powers internal circuitry and bias current sources |
| 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 interrupt; requires external pull-up; triggers fan control or system shutdown |
| GND | Power ground reference | Common return for VDD, analog sensing, and digital interface |
| ALERT | General temperature alert output | Open-drain, active-low SMBus/system interrupt; indicates local or remote out-of-range condition |
| SDATA | SMBus/I²C bidirectional data line | Open-drain data bus; requires external pull-up; supports multi-drop configuration |
| SCLK | SMBus/I²C clock input | Master-generated clock; open-drain input requiring external pull-up resistor |
Key Features
| Feature | Design Value |
|---|---|
| Remote diode offset calibration | Adjustable via RTOHB/RTOLB registers to correct PCB trace resistance and diode non-ideality |
| Programmable alarm hysteresis | T_CRIT hysteresis set via TH register (1–16 °C step) to prevent oscillation during thermal transitions |
| Flexible interrupt modes | ALERT configurable as comparator (auto-release) or latched interrupt (requires status read + mask reset) |
| Multi-device bus addressing | Eight factory-programmed SMBus slave addresses enable up to eight SA56004X sensors on one bus |
| Robust fault detection | Integrated OPEN flag detects remote diode disconnection; BUSY flag prevents premature register reads |
Applications
| Server CPU Thermal Monitoring | Laptop GPU Thermal Management |
|---|---|
Use Scenario: Real-time tracking of CPU die temperature and VRM heatsink temperature using integrated substrate PNP and discrete 2N3906 diodes. IC Role / Device Role / Timing Role: Dual-channel temperature sensor providing synchronized local (on-die) and remote (VRM) measurements with 38 ms conversion latency. Use Value: Enables dynamic fan speed control and throttling decisions based on validated ±1 °C remote diode accuracy and programmable T_CRIT thresholds. |
Use Scenario: Compact thermal supervision of discrete GPU and chipset in space-constrained laptop chassis with shared SMBus. IC Role / Device Role / Timing Role: Local temperature sensor for SoC thermal diode and remote channel for GPU package diode, both sampled at 16 Hz default rate. Use Value: Reduces BOM count by replacing two single-channel sensors; SMBus timeout ensures bus reliability during high-traffic display refresh cycles. |
| Industrial PLC Controller | Network Switch Line Card |
Use Scenario: Ambient and processor junction temperature monitoring in DIN-rail mounted programmable logic controllers operating at −40 °C to +70 °C. IC Role / Device Role / Timing Role: Primary thermal safety monitor interfacing with ARM-based controller via I²C Fast-mode (400 kHz). Use Value: Latch-up tested to JEDEC JESD78 (>100 mA), ensuring robustness against industrial ESD events and voltage transients. |
Use Scenario: Multi-point thermal profiling across ASIC, PHY, and power converter on high-density 1RU switch line cards. IC Role / Device Role / Timing Role: One SA56004CD,112 per line card monitoring local SoC temp and remote diodes on four key ICs via multiplexed D+/D− routing. Use Value: Eight address options allow daisy-chained thermal monitoring across 16+ line cards without address conflict or bus arbitration overhead. |
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 SO8 footprint and pinout; identical ALERT/T_CRIT functionality; but only 9-bit resolution (0.5 °C LSB) and no remote offset calibration | Valid for legacy designs where ±2 °C remote accuracy suffices and SMBus timeout is not required | Select LM86IMX/NOPB when cost sensitivity outweighs need for 0.125 °C resolution and diode calibration flexibility |
| MAX6657ESA+ | SO8 package, same pinout; supports 3.0–5.5 V supply (wider than SA56004CD,112's 3.0–3.6 V); lacks T_CRIT hysteresis register | Preferred in mixed-voltage systems where 5 V I/O compatibility is needed, but requires external hysteresis design for critical shutdown | Choose MAX6657ESA+ only if board already uses 5 V I/O rails and T_CRIT hysteresis can be implemented externally |
Compared with LM86IMX/NOPB and MAX6657ESA+, the SA56004CD,112 delivers superior remote accuracy (±1 °C vs. ±2–3 °C), finer resolution (0.125 °C vs. 0.5 °C), and integrated T_CRIT hysteresis-enabling more deterministic thermal shutdown behavior in high-reliability server and industrial applications.
Availability
SA56004CD,112 is available at Aetrix Electronics and suitable for server motherboard thermal management, industrial PLC controllers, and network switch line cards requiring stable component supply and long-term lifecycle support.
Supply support for SA56004CD,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 IoT applications.
The SA56004X family was designed specifically for high-accuracy, multi-zone thermal monitoring in enterprise computing platforms-emphasizing SMBus reliability, remote diode fidelity, and fail-safe interrupt architecture.
FAQ
What is the remote temperature accuracy specification for SA56004CD,112?
The SA56004CD,112 achieves ±1 °C remote diode temperature accuracy across −40 °C to +125 °C, verified under factory trimming conditions using standard PNP substrate diodes or discrete transistors like the 2N3904. This accuracy holds for properly biased remote diodes with series resistance <5 Ω and meets JEDEC JESD51-1 thermal test standards.
Does SA56004CD,112 support I²C Fast-mode operation?
Yes, SA56004CD,112 is fully compatible with I²C Fast-mode (400 kHz) in addition to SMBus 2.0. Its SCLK and SDATA pins meet I²C electrical specifications, including rise/fall time and bus capacitance limits, enabling interoperability with standard I²C controllers without protocol translation.
How does the T_CRIT output behave when both local and remote temperatures exceed their thresholds?
The SA56004CD,112 activates the T_CRIT output whenever either the local temperature exceeds LCS or the remote temperature exceeds RCS-whichever occurs first. The output remains asserted until both temperatures fall below their respective thresholds minus programmed hysteresis (TH register value), preventing chattering during thermal transients.
Can SA56004CD,112 measure temperature using a single diode connection?
Yes, SA56004CD,112 supports single-diode remote sensing using the D+ and D− pins. It supplies a constant 10 µA current through D+, sinks it at D−, and measures the resulting forward voltage drop-enabling accurate junction temperature extraction from any silicon diode meeting basic ideality and leakage requirements.
What is the default SMBus slave address for SA56004CD,112?
The SA56004CD,112 has a factory-programmed 7-bit SMBus slave address of 1001010 (0x4A in hexadecimal), as defined in Table 4 of the datasheet. This address is stored in OTP memory and cannot be altered in-circuit, ensuring deterministic bus enumeration in multi-sensor systems.
SA56004CD,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
SA56004CD,112 FAQ
1.How can I place an order for SA56004CD,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA56004CD,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 SA56004CD,112 reliable?
The price and inventory of SA56004CD,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA56004CD,112 is usually 5 days.
3.What payment methods are accepted for SA56004CD,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA56004CD,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA56004CD,112?
SA56004CD,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA56004CD,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 SA56004CD,112?
For technical support, including SA56004CD,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA56004CD,112 requirements.
6.How does Aetrix verify that SA56004CD,112 is sourced from the original manufacturer or authorized distributors?
All SA56004CD,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 SA56004CD,112 meets industry standards.
7.What is the process for return or replacement of SA56004CD,112?
All SA56004CD,112 units undergo pre-shipment inspection (PSI). If there is an issue with SA56004CD,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 SA56004CD,112 part is unused and in its original packaging.
Return procedure for SA56004CD,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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