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NXP Semiconductors SA56004DD,118
- Part No.:
- SA56004DD,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Analog and Digital Output
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SA56004DD,118.pdf
- Description:
- SENSOR DIGITAL -40C-125C 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,867
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Product details
Overview
SA56004DD,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 rate (0.0625–26 Hz) for thermal monitoring in server CPU substrates and embedded controllers.
For engineers reviewing the SA56004DD,118 datasheet, SA56004DD,118 pinout, SA56004DD,118 application, or SA56004DD,118 equivalent, this device delivers precise local/remote sensing with SMBus 2.0 timeout support, open-drain ALERT/T_CRIT outputs, factory-trimmed diode interface, and 8 selectable slave addresses - critical for multi-sensor thermal management in dense PCB layouts.
Technical Context
The SA56004DD,118 integrates a Σ-Δ A/D converter with dual sensing paths: on-chip bandgap local sensor (±2 °C) and external diode-connected transistor interface (±1 °C). Its register-mapped architecture supports independent high/low/critical thresholds for both channels, with status flags (LHIGH, RHIGH, LCRIT, RCRIT) and fault detection (OPEN, BUSY).
It implements SMBus 2.0 protocol compliance including TIMEOUT, ARA response capability, and interrupt masking via Configuration Register bits. Conversion rate is software-programmable across 10 discrete rates (0.0625–26 Hz), and remote offset correction (RTOHB/RTOLB) enables calibration against process variations in microprocessor thermal diodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature resolution | 11-bit (0.125 °C LSB) for local/remote measurements - enables fine-grained thermal control in fan speed regulation loops. |
| Remote accuracy | ±1 °C at −40 °C to +125 °C - validated for PNP substrate diodes (e.g., microprocessor thermal sensors) without external calibration. |
| Local accuracy | ±2 °C over full operating range - sufficient for ambient or package-level thermal margining. |
| Supply voltage | 3.0 V to 3.6 V - compatible with modern low-voltage server and embedded power rails; includes undervoltage lockout. |
| Interface | SMBus 2.0 and I²C Standard/Fast-mode - supports shared bus arbitration and ARA alert response in multi-device systems. |
| Conversion rate | Programmable 0.0625 Hz to 26 Hz - allows dynamic trade-off between update latency and power consumption in standby mode. |
| Operating temperature | −40 °C to +125 °C - qualified for industrial and server-grade thermal environments. |
Pinout & Package
SA56004DD,118 is supplied in SO8 package (SOT96-1), 3.9 mm body width, surface-mount, lead-free compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply input | 3.0–3.6 V DC rail; powers internal circuitry and diode bias current source. |
| D+ | Diode anode current source | Provides 10 µA constant current to forward-bias external PNP/NPN thermal diode. |
| D− | Diode cathode sink | Completes remote diode measurement path; connects to emitter/base of 2N3904/2N3906. |
| T_CRIT | Critical temperature alarm output | Open-drain, active-low signal for system shutdown or fan activation; requires external pull-up. |
| GND | Power ground reference | Common return for analog/digital sections; must be low-impedance for accurate remote sensing. |
| ALERT | General temperature alarm output | Open-drain, active-low interrupt indicating out-of-range local or remote temperature; supports SMBus ARA. |
| SDATA | SMBus/I²C bidirectional data | Open-drain serial data line; requires external pull-up; handles command, register read/write, and status reporting. |
| SCLK | SMBus/I²C clock input | Master-generated clock; synchronizes all register access and conversion triggers. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed remote diode interface | Eliminates need for per-unit calibration when monitoring microprocessor substrate PNP diodes. |
| Programmable remote temperature offset | Two's-complement RTOHB/RTOLB registers enable fine-tuning of remote channel accuracy against board-level thermal gradients. |
| Dual independent alarm outputs | Separate ALERT (configurable threshold) and T_CRIT (hard shutdown) pins allow tiered thermal response - e.g., fan ramp → throttling → shutdown. |
| SMBus timeout protection | Prevents bus lockup during communication faults; ensures system reliability in mission-critical thermal monitoring. |
| 8 factory-programmed slave addresses | Enables up to eight SA56004DD,118 devices on one SMBus without address conflict - ideal for multi-CPU or multi-die server boards. |
Applications
| Server CPU Thermal Monitoring | Laptop System Management |
|---|---|
Use Scenario: Real-time junction temperature tracking of dual-socket Xeon processors using integrated substrate PNP diodes. IC Role / Device Role / Timing Role: Remote diode sensor with 0.125 °C resolution and ±1 °C accuracy; provides feedback to BMC for dynamic fan control and thermal throttling. Use Value: Enables precise thermal headroom management without external calibration, reducing BOM cost and firmware complexity. |
Use Scenario: Simultaneous monitoring of GPU die, CPU VRM, and battery pack temperature in ultrabook platforms. IC Role / Device Role / Timing Role: Dual-channel sensor providing local (ambient) and remote (VRM diode) readings at 16 Hz default rate for responsive thermal policy execution. Use Value: Supports aggressive power management while preventing thermal runaway in space-constrained designs. |
| Industrial PLC Controller | Network Switch Thermal Safety |
Use Scenario: Ambient and processor junction temperature supervision in DIN-rail mounted programmable logic controllers operating at −40 °C to +70 °C. IC Role / Device Role / Timing Role: Local sensor tracks enclosure air temperature; remote channel monitors ARM Cortex-A9 SoC thermal diode via 2N3906. Use Value: Provides fail-safe shutdown via T_CRIT output if ambient exceeds 75 °C or SoC exceeds 105 °C - meeting IEC 61000-6-2 immunity requirements. |
Use Scenario: Multi-point thermal surveillance across ASICs, PHYs, and power converters in 1U rack-mounted Ethernet switches. IC Role / Device Role / Timing Role: Eight SA56004DD,118 units deployed across backplane, each with unique SMBus address, feeding data to switch ASIC via shared bus. Use Value: Enables per-component thermal derating and predictive maintenance without adding dedicated microcontrollers or ADCs. |
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 pinout and SMBus interface; remote accuracy ±1.5 °C (vs. ±1 °C); no remote offset register. | Lacks remote calibration capability; less suitable for high-precision CPU thermal diode monitoring. | Select LM86IMX/NOPB only if ±1.5 °C remote tolerance is acceptable and offset adjustment is unnecessary. |
| MAX6657ESA+ | Identical SO8 footprint and register map; operates at 3.0–5.5 V (wider than SA56004DD,118's 3.0–3.6 V); no SMBus timeout support. | Better supply flexibility but lacks bus fault resilience required in high-availability server systems. | Choose MAX6657ESA+ for legacy 5 V designs where SMBus timeout is not mandated by system architecture. |
Compared with LM86IMX/NOPB and MAX6657ESA+, the SA56004DD,118 offers superior remote accuracy and built-in SMBus timeout - making it the preferred choice for new server and industrial controller designs requiring robust thermal safety and minimal calibration overhead.
Availability
SA56004DD,118 is available at Aetrix Electronics and suitable for server thermal management, laptop system monitoring, and industrial PLC controller applications requiring stable component supply and long-term lifecycle support.
Supply support for SA56004DD,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, with deep expertise in mixed-signal sensor ICs and embedded processing.
The SA56004DD,118 belongs to NXP's precision analog temperature sensor product line, designed specifically for high-reliability thermal monitoring in compute-intensive systems where diode-based remote sensing and SMBus integration are essential.
FAQ
What is the remote diode accuracy specification for SA56004DD,118?
The SA56004DD,118 achieves ±1 °C remote diode temperature accuracy over −40 °C to +125 °C, factory-trimmed for PNP substrate diodes commonly found in microprocessors. This accuracy holds without user calibration and is confirmed across the full operating voltage (3.0–3.6 V) and conversion rate range. Local sensor accuracy is ±2 °C.
Does SA56004DD,118 support SMBus Alert Response Address (ARA)?
Yes, SA56004DD,118 fully supports SMBus 2.0 ARA protocol. When multiple SA56004DD,118 devices share a common ALERT line, the master can issue an ARA command to identify which unit asserted the interrupt. This requires proper configuration of the ALERT Mode register (AM bit D0 = LOW) and adherence to SMBus timing specifications.
How many unique SMBus addresses does SA56004DD,118 support?
The SA56004DD,118 has a factory-programmed 7-bit SMBus slave address of 1001011 (0x4B in hex), corresponding to its "DD" variant in the SA56004X family. While the full SA56004X series offers eight address options (0x48–0x4F), SA56004DD,118 is fixed to 0x4B and cannot be reprogrammed.
What is the function of the D+ and D− pins on SA56004DD,118?
D+ supplies a constant 10 µA current to the anode of an external diode-connected transistor (e.g., 2N3904 NPN or 2N3906 PNP), while D− sinks that current from the cathode. Together, they form a precision remote temperature sensing interface that measures VBE drop - enabling the SA56004DD,118 to calculate junction temperature with ±1 °C accuracy.
Can SA56004DD,118 operate from a 5 V supply?
No. SA56004DD,118 is specified for 3.0 V to 3.6 V operation only. Applying 5 V to VDD exceeds absolute maximum ratings and may cause permanent damage. For 5 V systems, use level-shifting on SCLK/SDATA lines and ensure VDD is derived from a regulated 3.3 V rail - consistent with its design for modern low-voltage server and embedded platforms.
SA56004DD,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
SA56004DD,118 FAQ
1.How can I place an order for SA56004DD,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA56004DD,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 SA56004DD,118 reliable?
The price and inventory of SA56004DD,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA56004DD,118 is usually 5 days.
3.What payment methods are accepted for SA56004DD,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA56004DD,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA56004DD,118?
SA56004DD,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA56004DD,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 SA56004DD,118?
For technical support, including SA56004DD,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA56004DD,118 requirements.
6.How does Aetrix verify that SA56004DD,118 is sourced from the original manufacturer or authorized distributors?
All SA56004DD,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 SA56004DD,118 meets industry standards.
7.What is the process for return or replacement of SA56004DD,118?
All SA56004DD,118 units undergo pre-shipment inspection (PSI). If there is an issue with SA56004DD,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 SA56004DD,118 part is unused and in its original packaging.
Return procedure for SA56004DD,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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