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NXP Semiconductors SA56004ED,112
- Part No.:
- SA56004ED,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Analog and Digital Output
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SA56004ED,112.pdf
- Description:
- SENSOR DIGITAL -40C-125C 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,538
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Product details
Overview
SA56004ED,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, 0.125 °C resolution, and operation from −40 °C to +125 °C - used for thermal monitoring of microprocessor substrate PNP junctions or discrete diode-connected transistors (e.g., 2N3904/2N3906) in server motherboard power management.
For engineers reviewing the SA56004ED,112 datasheet, SA56004ED,112 pinout, SA56004ED,112 application, or SA56004ED,112 equivalent, this page delivers verified technical context, validated pin functions, confirmed package mapping to SO8, real-world thermal alarm use cases, and two rigorously cross-checked alternative parts with documented functional and interface differences.
Technical Context
The SA56004ED,112 integrates a Σ-Δ A/D converter with separate local and remote sensing paths, supporting simultaneous 11-bit temperature measurements at programmable rates from 0.0625 Hz to 26 Hz. Its dual interrupt outputs - open-drain ALERT (for general out-of-range alerts) and T_CRIT (for critical shutdown triggers) - are independently maskable via configuration register bits and driven by dedicated comparators against user-programmable high/low/T_CRIT thresholds.
It implements SMBus 2.0 protocol compliance including TIMEOUT detection and ARA response capability, operates from 3.0 V to 3.6 V, and features factory-trimmed remote offset compensation, undervoltage lockout, and JEDEC JESD78 latch-up immunity (>100 mA). The device uses OTP-stored 7-bit slave address 1001100b, matching LM86/MAX6657/ADM1032 for drop-in replacement in existing SMBus thermal management designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Resolution | 0.125 °C (11-bit two's complement output for local/remote channels) |
| Remote Accuracy | ±1 °C (factory-trimmed, applicable to diode-connected transistors or microprocessor thermal diodes) |
| Local Accuracy | ±2 °C (on-chip sensor, usable for ambient or die temperature tracking) |
| Operating Voltage | 3.0 V to 3.6 V (undervoltage lockout prevents erroneous readings below threshold) |
| Conversion Rate | Programmable 0.0625 Hz to 26 Hz (via CR register; default = 16 Hz after POR) |
| Interface Protocol | SMBus 2.0 and I²C Standard/Fast-mode compatible (open-drain SDATA/SCLK with 10 kΩ pull-ups) |
| Alert Outputs | Two independent open-drain outputs: ALERT (configurable as comparator/interrupt/ARA) and T_CRIT (critical shutdown trigger) |
Pinout & Package
SA56004ED,112 is supplied in the SO8 package (SOT96-1), 3.9 mm body width, 8-lead plastic small outline format. Pin functions are electrically validated per NXP Rev. 7 datasheet and match SO8 pinout for all SA56004X variants.
| 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 constant-current excitation (≈10 µA) to remote diode anode for accurate ΔVBE measurement |
| D− | Diode cathode sink | Completes remote diode bias path; enables differential remote junction voltage sensing |
| T_CRIT | Critical temperature alarm output | Open-drain, active-low signal asserting when local or remote temp exceeds programmed T_CRIT threshold; requires external pull-up |
| GND | Power ground reference | Common return for VDD, analog sensing, and digital I/O; must be low-impedance for measurement stability |
| ALERT | General over/undertemperature alarm | Open-drain, active-low interrupt indicating violation of any programmed HIGH/LOW threshold; supports SMBus ARA |
| SDATA | SMBus/I²C bidirectional data line | Open-drain serial data bus; requires external pull-up; handles command, register read/write, and status reporting |
| SCLK | SMBus/I²C clock input | Master-generated clock (up to 400 kHz Fast-mode); synchronizes all SMBus transactions |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed remote diode accuracy | ±1 °C error bound without calibration - reduces system-level thermal margining and eliminates field calibration steps |
| Programmable remote offset correction | Adjusts remote reading by ±63.875 °C in 0.125 °C steps (RTOHB/RTOLB registers) - compensates for transistor-specific VBE non-idealities |
| Dual independent alarm outputs | ALERT (configurable interrupt/comparator/ARA) and T_CRIT (hard shutdown trigger) enable tiered thermal response - e.g., fan ramp + immediate shutdown |
| SMBus TIMEOUT protocol support | Prevents bus lockup during communication faults - essential for unattended server and industrial control applications |
| 8 factory-configured SMBus addresses | Enables up to eight SA56004ED,112 devices on one bus without address conflict - critical for multi-CPU/multi-die server thermal monitoring |
Applications
| Server CPU Thermal Monitoring | Laptop GPU Thermal Protection |
|---|---|
Use Scenario: Real-time junction temperature tracking of dual-socket Xeon processors using integrated substrate PNP diodes. IC Role / Device Role / Timing Role: Remote channel measures ΔVBE across CPU-embedded diode; local channel monitors sensor die temperature for self-calibration drift compensation. Use Value: Enables dynamic frequency scaling and fan speed control with ±1 °C remote accuracy - avoids thermal throttling false positives and extends CPU lifetime. |
Use Scenario: Overtemperature protection for discrete GPU die in thin-profile notebooks with limited airflow. IC Role / Device Role / Timing Role: Remote channel reads 2N3904-connected diode adjacent to GPU; T_CRIT output directly gates VRM enable to force safe shutdown before silicon damage. Use Value: Guarantees <100 ms critical shutdown latency at >105 °C - meets Intel Mobile Platform Thermal Specification (MPTS) safety requirements. |
| Industrial PLC Cabinet Management | Test Equipment Ambient Stability Control |
Use Scenario: Monitoring ambient and power module temperatures inside sealed industrial PLC enclosures operating at −40 °C to +85 °C. IC Role / Device Role / Timing Role: Local sensor tracks enclosure air temperature; remote channel monitors heatsink-mounted diode on 48 V DC-DC converter MOSFETs. Use Value: Programmable conversion rate (down to 0.0625 Hz) minimizes self-heating and extends battery life in remote, low-power PLC deployments. |
Use Scenario: Maintaining stable thermal environment for precision ADC calibration in automated test equipment (ATE). IC Role / Device Role / Timing Role: Local sensor provides reference for temperature-compensated gain/offset correction; ALERT asserts when chamber deviates >±0.5 °C from setpoint. Use Value: 0.125 °C resolution and ±2 °C local accuracy enable sub-ppm thermal drift correction - critical for 24-bit metrology-grade measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar remote/local digital temperature sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM86IMX/NOPB | Same 8-pin SOIC package, identical pinout, and 1001100b SMBus address; remote accuracy ±1.5 °C (vs. ±1 °C), no remote offset register | Valid for legacy LM86-replacement designs but lacks fine remote calibration - unsuitable where diode non-ideality exceeds ±0.5 °C | Select LM86IMX/NOPB only if existing layout and firmware rely strictly on LM86 register map and ±1.5 °C remote tolerance is acceptable. |
| MAX6657AESA+ | SO8 package, same pinout and 1001100b address; remote accuracy ±1.25 °C; supports 3.0–5.5 V supply (wider than SA56004ED,112's 3.0–3.6 V) | Compatible with mixed-voltage systems (e.g., 5 V SMBus controllers), but lacks SMBus TIMEOUT and ARA support - limits robustness in mission-critical servers | Choose MAX6657AESA+ only when board-level supply rail exceeds 3.6 V and SMBus TIMEOUT is not required for system reliability certification. |
Compared with LM86IMX/NOPB and MAX6657AESA+, SA56004ED,112 delivers tighter remote accuracy (±1 °C), full SMBus 2.0 compliance (including TIMEOUT and ARA), and remote offset adjustment - making it the preferred choice for new server, industrial, and high-reliability thermal management designs requiring precise, standards-compliant, and field-tunable sensing.
Availability
SA56004ED,112 is available at Aetrix Electronics and suitable for server motherboard thermal management, laptop GPU protection, industrial PLC cabinet monitoring, and precision test equipment ambient control requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SA56004ED,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 leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in mixed-signal sensor ICs and embedded processing.
The SA56004ED,112 belongs to NXP's SA56004X family of SMBus temperature sensors, designed specifically for high-accuracy, multi-point thermal monitoring in compute-intensive systems where reliability, standards compliance, and diode-junction measurement fidelity are critical.
FAQ
What is the remote temperature accuracy specification for SA56004ED,112?
The SA56004ED,112 achieves ±1 °C remote temperature accuracy when measuring diode-connected transistors (e.g., 2N3904/2N3906) or microprocessor substrate PNP junctions. This specification is factory-trimmed and applies across the full operating range of −40 °C to +125 °C. Local sensor accuracy is ±2 °C. Both values are guaranteed per NXP's SA56004X Rev. 7 datasheet and do not require end-user calibration.
Does SA56004ED,112 support I²C communication in addition to SMBus?
Yes, SA56004ED,112 is fully compatible with I²C Standard-mode (100 kHz) and Fast-mode (400 kHz) protocols in addition to SMBus 2.0. Its SDATA and SCLK pins implement open-drain signaling with standard I²C timing requirements. However, SMBus-specific features - including TIMEOUT detection, Alert Response Address (ARA), and Packet Error Checking (PEC) - are only active under SMBus protocol conditions.
What is the function of the D+ and D− pins on SA56004ED,112?
The D+ pin supplies a constant current (≈10 µA) to the anode of the remote diode, while the D− pin sinks that current from the cathode. Together, they enable precise differential measurement of the diode's forward voltage (ΔVBE) - the basis for remote junction temperature calculation. These pins must connect directly to the diode terminals with minimal trace length and no series resistance to maintain ±1 °C accuracy.
Can SA56004ED,112 operate from a 5 V supply rail?
No, SA56004ED,112 is rated for 3.0 V to 3.6 V only. Operation above 3.6 V violates absolute maximum ratings and may cause permanent damage or parametric shift. For 5 V systems, a dedicated 3.3 V LDO regulator must supply VDD. The device includes undervoltage lockout to prevent erroneous readings below 2.7 V, but no overvoltage protection is integrated.
How does the T_CRIT output differ from the ALERT output on SA56004ED,112?
T_CRIT is a dedicated critical-temperature alarm output that activates only when local or remote temperature exceeds its independently programmable threshold register (LCS/RCS), typically used to trigger immediate cooling or shutdown. ALERT is a general-purpose out-of-range indicator activated by violations of any programmed HIGH/LOW threshold - configurable as interrupt, comparator, or SMBus ARA response. Both are open-drain and require external pull-ups.
SA56004ED,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
SA56004ED,112 FAQ
1.How can I place an order for SA56004ED,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA56004ED,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 SA56004ED,112 reliable?
The price and inventory of SA56004ED,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA56004ED,112 is usually 5 days.
3.What payment methods are accepted for SA56004ED,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA56004ED,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA56004ED,112?
SA56004ED,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA56004ED,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 SA56004ED,112?
For technical support, including SA56004ED,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA56004ED,112 requirements.
6.How does Aetrix verify that SA56004ED,112 is sourced from the original manufacturer or authorized distributors?
All SA56004ED,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 SA56004ED,112 meets industry standards.
7.What is the process for return or replacement of SA56004ED,112?
All SA56004ED,112 units undergo pre-shipment inspection (PSI). If there is an issue with SA56004ED,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 SA56004ED,112 part is unused and in its original packaging.
Return procedure for SA56004ED,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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