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NXP Semiconductors SA56004HD,118
- Part No.:
- SA56004HD,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Analog and Digital Output
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SA56004HD,118.pdf
- Description:
- SENSOR DIGITAL -40C-125C 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,610
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Product details
Overview
SA56004HD,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 programmable conversion rates 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 SA56004HD,118 datasheet, SA56004HD,118 pinout, SA56004HD,118 application, or SA56004HD,118 equivalent, key selection considerations include its SO8 package compatibility with LM86/MAX6657/ADM1032, factory-trimmed 8-device address options, open-drain ALERT/T_CRIT outputs with hysteresis control, and SMBus 2.0 timeout support for system reliability.
Technical Context
The SA56004HD,118 integrates a Σ-Δ A/D converter with separate local and remote sensing paths, supporting simultaneous 11-bit (0.125 °C LSB) remote diode and 8-bit local die temperature measurements. Its register-mapped SMBus interface enables independent configuration of high/low/critical thresholds per channel, offset correction for remote diode non-ideality, and fault detection including diode open-circuit monitoring.
It implements dual interrupt outputs: ALERT (active-Low, maskable, supports comparator/interrupt/ARA modes) and T_CRIT (active-Low, dedicated critical shutdown signal). The device operates in free-running or software standby mode (<10 µA quiescent current), with conversion rate programmable via the 4-bit CR register and power-on reset defaults including 70 °C high limits and 85 °C T_CRIT setpoints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Resolution | 11-bit remote/local data (0.125 °C LSB); 8-bit T_CRIT/limit registers (1.0 °C LSB) |
| Remote Accuracy | ±1 °C at −40 °C to +125 °C range, factory-trimmed for PNP substrate or discrete diode-connected transistors |
| Supply Voltage | 3.0 V to 3.6 V - undervoltage lockout prevents erroneous readings during brown-out |
| Interface Protocol | SMBus 2.0 compliant with timeout support; also I²C Standard/Fast-mode compatible |
| Conversion Rate | Programmable from 0.0625 Hz to 26 Hz - enables dynamic trade-off between update latency and power consumption |
| Operating Temperature | −40 °C to +125 °C ambient - validated for server CPU/GPU thermal monitoring environments |
| Device Address Options | 8 factory-programmed 7-bit SMBus addresses - allows up to eight SA56004X sensors on one bus without conflict |
Pinout & Package
SA56004HD,118 is supplied in the SO8 (SOT96-1) plastic small outline package: 8-lead, 3.9 mm body width, surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply input | 3.0–3.6 V DC supply; powers internal circuitry and bias current sources for remote diode sensing |
| D+ | Diode anode current source | Provides constant current (≈10 µA) to forward-bias external PNP or NPN diode junctions |
| D− | Diode cathode sink | Completes remote diode current path; voltage drop across D+/D− reflects junction temperature |
| T_CRIT | Critical temperature alarm output | Open-drain, active-Low output requiring external pull-up; triggers fan activation or system shutdown when local/remote exceeds programmed T_CRIT threshold |
| GND | Power ground reference | Common return path for VDD, D+, D−, and internal analog/digital blocks |
| ALERT | General temperature alert output | Open-drain, active-Low output requiring external pull-up; signals out-of-range conditions (high/low) for local or remote channels |
| SDATA | SMBus/I²C bidirectional data line | Open-drain serial data line; requires external pull-up; supports read/write of 16+ configuration and status registers |
| SCLK | SMBus/I²C clock input | Master-generated clock signal; synchronizes all register access and conversion timing |
Key Features
| Feature | Design Value |
|---|---|
| Remote diode offset calibration | Adjustable 11-bit remote temperature offset register (RTOHB/RTOLB) compensates for transistor non-ideality and PCB trace resistance |
| Configurable interrupt behavior | ALERT output supports three modes: comparator (self-clearing), interrupt (latched until status read), or SMBus ARA response - selectable via AM register bit D0 |
| Fault-tolerant sensing | Integrated OPEN fault detection identifies disconnected remote diodes; BUSY flag prevents register reads during conversion |
| Thermal hysteresis control | Programmable T_CRIT hysteresis (0–31 °C in 1 °C steps) prevents oscillation during critical temperature transitions |
| Low-power standby operation | Software-controlled RUN/STOP bit reduces supply current to <10 µA while retaining register state and enabling one-shot conversions |
Applications
| Server CPU Thermal Monitoring | Laptop GPU Thermal Protection |
|---|---|
Use Scenario: Real-time tracking of multi-core CPU die temperature and integrated VRM hotspots in 1U/2U rack servers. IC Role / Device Role / Timing Role: Local sensor measures SoC junction temperature; remote channel monitors discrete diode on CPU package substrate. Use Value: Enables dynamic fan speed control and graceful throttling before thermal shutdown, leveraging ±1 °C remote accuracy and 0.125 °C resolution. |
Use Scenario: Compact thermal supervision of mobile GPU and memory modules in space-constrained laptop chassis. IC Role / Device Role / Timing Role: Remote diode sensing of GPU thermal diode; local sensor monitors chipset temperature near VRMs. Use Value: Dual-alert architecture (ALERT for throttling, T_CRIT for emergency shutdown) ensures compliance with JEDEC JESD22-A104 reliability standards. |
| Industrial PLC Controller Cooling | Network Switch ASIC Thermal Management |
Use Scenario: Continuous thermal validation of programmable logic controller CPUs operating in extended industrial temperature ranges. IC Role / Device Role / Timing Role: Monitors both local controller die and remote diode on field I/O module ASICs via shared SMBus. Use Value: Eight factory-programmed SMBus addresses allow daisy-chained thermal monitoring across multiple I/O racks without address collision. |
Use Scenario: High-density thermal monitoring of multi-port Ethernet switch ASICs with integrated thermal diodes. IC Role / Device Role / Timing Role: Remote channel tracks ASIC junction temperature; local sensor validates ambient board temperature near heatsink base. Use Value: SMBus timeout protocol prevents bus lockup during transient thermal faults, ensuring uninterrupted network management traffic. |
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 |
|---|---|---|---|
| LM86IMMX/NOPB | Same SO8 package and pinout; identical 11-bit remote resolution but ±1.5 °C remote accuracy (vs. ±1 °C for SA56004HD,118); no T_CRIT hysteresis register | Valid for legacy designs requiring drop-in replacement where ±0.5 °C remote accuracy margin is acceptable | Select LM86IMMX/NOPB only if existing layout uses National Semiconductor footprint and SMBus address 1001100b is required |
| MAX6657AESA+ | SO8 package; same ALERT/T_CRIT dual-output architecture; 0.25 °C remote resolution (vs. 0.125 °C); supports 3.0–5.5 V supply (wider than SA56004HD,118's 3.0–3.6 V) | Better suited for mixed-voltage industrial boards where 5 V SMBus controllers coexist with 3.3 V logic | Choose MAX6657AESA+ when system-level supply tolerance exceeds 3.6 V or when legacy MAX6657 firmware integration is prioritized |
Compared with LM86IMMX/NOPB and MAX6657AESA+, SA56004HD,118 delivers superior remote accuracy (±1 °C), finer 0.125 °C resolution, and configurable T_CRIT hysteresis - making it optimal for next-generation server thermal management where precision and reliability margins are critical.
Availability
SA56004HD,118 is available at Aetrix Electronics and suitable for server motherboard design, industrial PLC thermal monitoring, and network switch ASIC cooling requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SA56004HD,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 specializing in secure connectivity solutions for automotive, industrial, and communications markets, with headquarters in Eindhoven, Netherlands.
The SA56004X family was designed specifically for high-accuracy, multi-point thermal management in enterprise computing platforms - emphasizing SMBus robustness, diode compensation flexibility, and fail-safe interrupt signaling for mission-critical infrastructure.
FAQ
What is the remote temperature accuracy specification for SA56004HD,118?
The SA56004HD,118 achieves ±1 °C remote diode temperature accuracy across the full −40 °C to +125 °C operating range, verified under factory trimming conditions using standard PNP substrate diodes or discrete 2N3904/2N3906 transistors. This accuracy holds without user calibration and is documented in the NXP SA56004X product data sheet Rev. 7.
Does SA56004HD,118 support I²C communication in addition to SMBus?
Yes, SA56004HD,118 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 built-in timeout protection, and it responds to standard I²C START/STOP/ACK sequences - enabling interoperability with generic I²C masters where SMBus-specific commands are not required.
How many unique SMBus addresses does SA56004HD,118 support?
SA56004HD,118 has a factory-programmed 7-bit SMBus slave address of 1001111b (0x4F), one of eight fixed options in the SA56004X family. This allows up to eight SA56004X devices - including SA56004HD,118 - to share a single SMBus without address conflict, provided each uses a distinct type number (e.g., SA56004AD through SA56004HD).
What is the function of the D+ and D− pins on SA56004HD,118?
The D+ and D− pins on SA56004HD,118 form a dedicated current-source/sink pair for remote diode temperature sensing. D+ supplies a constant ~10 µA current to the anode of an external PNP substrate diode or NPN transistor (e.g., 2N3904), while D− sinks that current from the cathode. The resulting voltage drop, measured internally, correlates directly to junction temperature with 0.125 °C resolution.
Can SA56004HD,118 operate in low-power standby mode, and how is it controlled?
Yes, SA56004HD,118 supports software-configurable low-power standby mode. Setting bit 6 (RUN/STOP) of the Configuration register (address 03h/09h) to logic HIGH halts the internal oscillator and reduces supply current to <10 µA. The device retains all register values and remains responsive to SMBus commands; a one-shot conversion can be triggered at any time, after which it automatically returns to standby.
SA56004HD,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:
- 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,118 FAQ
1.How can I place an order for SA56004HD,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA56004HD,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 SA56004HD,118 reliable?
The price and inventory of SA56004HD,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA56004HD,118 is usually 5 days.
3.What payment methods are accepted for SA56004HD,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA56004HD,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA56004HD,118?
SA56004HD,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA56004HD,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 SA56004HD,118?
For technical support, including SA56004HD,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA56004HD,118 requirements.
6.How does Aetrix verify that SA56004HD,118 is sourced from the original manufacturer or authorized distributors?
All SA56004HD,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 SA56004HD,118 meets industry standards.
7.What is the process for return or replacement of SA56004HD,118?
All SA56004HD,118 units undergo pre-shipment inspection (PSI). If there is an issue with SA56004HD,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 SA56004HD,118 part is unused and in its original packaging.
Return procedure for SA56004HD,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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