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NXP Semiconductors SA56004AD,118
- Part No.:
- SA56004AD,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Analog and Digital Output
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SA56004AD,118.pdf
- Description:
- SENSOR DIGITAL -40C-125C 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,136
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Product details
Overview
SA56004AD,118 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 calibration. It monitors microprocessor thermal diodes or discrete transistors (e.g., 2N3904/2N3906) and operates from −40 °C to +125 °C in server thermal management systems.
For engineers reviewing the SA56004AD,118 datasheet, SA56004AD,118 pinout, SA56004AD,118 application, or SA56004AD,118 equivalent, key selection criteria include its 0.125 °C resolution, programmable conversion rate (0.0625–26 Hz), SMBus 2.0 timeout support, open-drain ALERT/T_CRIT outputs, and SO8 package compatibility with LM86/MAX6657/ADM1032 designs.
Technical Context
The SA56004AD,118 integrates a 11-bit Σ-Δ A/D converter for local and remote temperature sensing, with separate high/low and T_CRIT threshold registers for both channels. Its architecture supports simultaneous local die and external diode junction monitoring using dedicated D+ and D− terminals with current-source/sink biasing.
It implements SMBus 2.0 protocol compliance including TIMEOUT detection, ARA response capability, and configurable ALERT output modes (interrupt, comparator, or SMBus alert). The device uses OTP-programmed 7-bit slave address (1001000b), supports 8 address options on one bus, and features latch-up immunity per JEDEC JESD78 (>100 mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Resolution | 0.125 °C (11-bit two's complement format for remote/local readings) |
| 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 conversions below threshold |
| Conversion Rate | Programmable from 0.0625 Hz to 26 Hz - enables dynamic power/performance trade-offs |
| SMBus Compatibility | Fully compliant with SMBus 2.0, including TIMEOUT and Alert Response Address (ARA) protocols |
| Operating Temperature | −40 °C to +125 °C ambient - qualified for industrial and server environments |
Pinout & Package
SA56004AD,118 is supplied in the SO8 package (SOT96-1), 3.9 mm body width, 8-lead plastic small outline format. Pin functions are validated per NXP Rev. 7 datasheet Figure 2 and Table 3.
| 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 remote diode junction |
| D− | Diode cathode current sink | Completes remote diode bias path; enables accurate ΔVBE measurement |
| T_CRIT | Critical temperature alarm output | Open-drain, active-low interrupt for fan control or system shutdown; requires external pull-up |
| GND | Power ground reference | Common return for analog and digital sections; critical for noise-sensitive temp measurements |
| ALERT | General over/undertemperature alarm | Open-drain, active-low SMBus/system interrupt; latched or auto-clearing per configuration |
| SDATA | SMBus/I²C bidirectional data line | Open-drain interface requiring external pull-up; supports Standard/Fast-mode I²C |
| SCLK | SMBus/I²C clock input | Master-generated clock; synchronizes all register reads/writes and conversion triggers |
Key Features
| Feature | Design Value |
|---|---|
| Remote diode offset calibration | Adjustable via RTOHB/RTOLB registers to compensate for transistor-specific VBE non-idealities |
| Programmable T_CRIT hysteresis | Configurable 1–16 °C hysteresis (TH register) prevents oscillation during critical thermal events |
| Software standby mode | Run/Stop bit enables <10 µA quiescent current while retaining register state and SMBus responsiveness |
| Diode open-circuit detection | Automatically flags D+/D− disconnect via OPEN bit in Status Register (SR), preventing false alarms |
| Three ALERT operating modes | Interrupt, comparator, or SMBus ARA - selectable via AM register D0 for flexible system integration |
Applications
| Server CPU Thermal Monitoring | Laptop GPU Thermal Protection |
|---|---|
Use Scenario: Real-time monitoring of multi-core CPU die temperature and socket-mounted thermal diode in 1U/2U rack servers. IC Role / Device Role / Timing Role: Dual-channel sensor providing independent local (die) and remote (package) temperature data with T_CRIT-triggered fan ramp-up. Use Value: Enables precise thermal throttling and predictive cooling before critical junction temperatures are exceeded, extending processor lifetime. |
Use Scenario: Compact thermal supervision of discrete GPU die and VRM MOSFETs in space-constrained laptop chassis. IC Role / Device Role / Timing Role: Remote diode channel tracks GPU junction via onboard 2N3904; local channel monitors PCB ambient near VRMs. Use Value: Delivers 0.125 °C resolution within SO8 footprint, allowing fine-grained thermal policy without adding board area or BOM cost. |
| Industrial PLC Controller | Network Switch Power Supply |
Use Scenario: Continuous thermal surveillance of FPGA and power ICs in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Local sensor monitors controller ambient; remote channel tracks heatsink-mounted diode on DC-DC converter. Use Value: Supports extended −40 °C to +125 °C operation and latch-up immunity >100 mA, ensuring reliability in harsh factory environments. |
Use Scenario: Overtemperature protection for 48 V PoE switch power supplies with multiple isolated DC-DC stages. IC Role / Device Role / Timing Role: Monitors primary-side MOSFET junction via remote diode and secondary-side rectifier temperature locally. Use Value: Dual independent alarm outputs (ALERT and T_CRIT) allow tiered response: fan speed increase (ALERT) followed by graceful shutdown (T_CRIT). |
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 SO8 pinout and 7-bit address (1001100b); identical ALERT/T_CRIT functionality but no remote offset register | Lacks programmable remote diode offset calibration - less suitable for non-ideal transistor junctions | Preferred when drop-in replacement is required and remote diode matching is consistent across production |
| MAX6657AESA+ | SO8 package, same SMBus interface; remote accuracy ±1.5 °C (vs. ±1 °C), no T_CRIT hysteresis register | Lower remote accuracy and fixed 10 °C T_CRIT hysteresis limit flexibility in critical shutdown timing | Select when cost sensitivity outweighs need for finest remote calibration or adjustable hysteresis |
Compared with LM86IMX/NOPB and MAX6657AESA+, the SA56004AD,118 provides superior remote diode accuracy (±1 °C), user-adjustable offset compensation, and programmable T_CRIT hysteresis - making it optimal for high-reliability server and industrial thermal control where junction-level precision matters.
Availability
SA56004AD,118 is available at Aetrix Electronics and suitable for server thermal management, industrial PLC controllers, and network equipment power supply monitoring requiring stable component supply across long product lifecycles.
Supply support for SA56004AD,118 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.
The SA56004AD,118 belongs to NXP's precision analog sensor portfolio, designed specifically for high-accuracy thermal monitoring in compute-intensive and mission-critical embedded systems.
FAQ
What is the remote temperature accuracy specification for SA56004AD,118?
The SA56004AD,118 achieves ±1 °C remote temperature accuracy across −40 °C to +125 °C when monitoring diode-connected transistors such as 2N3904 or 2N3906, enabled by factory trimming and supported by programmable remote offset registers (RTOHB/RTOLB) in the SA56004AD,118.
Does SA56004AD,118 support I²C communication in addition to SMBus?
Yes, the SA56004AD,118 is compatible with I²C Standard-mode (100 kHz) and Fast-mode (400 kHz) in addition to full SMBus 2.0 compliance, including TIMEOUT detection and Alert Response Address (ARA) protocol - all implemented via the same SDATA/SCLK interface used by the SA56004AD,118.
How does the SA56004AD,118 handle remote diode disconnection detection?
The SA56004AD,118 continuously monitors D+/D− terminal voltage and sets the OPEN bit (D2) in the Status Register (SR) when an open-circuit condition is detected on the remote diode path. This fault flag triggers the ALERT output if not masked, preventing false thermal alarms and enabling diagnostics in the SA56004AD,118.
What is the default SMBus slave address for SA56004AD,118?
The SA56004AD,118 has a factory-programmed 7-bit SMBus slave address of 1001000b (0x48 hexadecimal), as defined in Table 4 of the NXP datasheet. This address is stored in OTP memory and cannot be changed, distinguishing it from other SA56004X variants like SA56004ED,118 (0x4C).
Can SA56004AD,118 operate with a 5.0 V supply?
No, the SA56004AD,118 is specified for 3.0 V to 3.6 V operation only. Although the VDD pin description states "DC voltage from 3.0 V to 5.5 V", the Absolute Maximum Ratings and functional specifications in the SA56004AD,118 datasheet confirm guaranteed operation only within 3.0–3.6 V, with undervoltage lockout activating below 2.7 V.
SA56004AD,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Last Time Buy
- 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
SA56004AD,118 FAQ
1.How can I place an order for SA56004AD,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA56004AD,118 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 SA56004AD,118 reliable?
The price and inventory of SA56004AD,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA56004AD,118 is usually 5 days.
3.What payment methods are accepted for SA56004AD,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA56004AD,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA56004AD,118?
SA56004AD,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA56004AD,118 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 SA56004AD,118?
For technical support, including SA56004AD,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA56004AD,118 requirements.
6.How does Aetrix verify that SA56004AD,118 is sourced from the original manufacturer or authorized distributors?
All SA56004AD,118 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 SA56004AD,118 meets industry standards.
7.What is the process for return or replacement of SA56004AD,118?
All SA56004AD,118 units undergo pre-shipment inspection (PSI). If there is an issue with SA56004AD,118, 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 SA56004AD,118 part is unused and in its original packaging.
Return procedure for SA56004AD,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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