My Inquiry
My Account
NXP Semiconductors SA56004GD,118
- Part No.:
- SA56004GD,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Analog and Digital Output
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SA56004GD,118.pdf
- Description:
- SENSOR DIGITAL -40C-125C 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,629
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SA56004GD,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. It interfaces via open-drain SMBus/I²C (3.0–3.6 V) and supports remote sensing of PNP substrate diodes or discrete transistors (e.g., 2N3904/2N3906).
For engineers reviewing the SA56004GD,118 datasheet, SA56004GD,118 pinout, SA56004GD,118 application, or SA56004GD,118 equivalent, this page delivers verified specifications, SO8 package details, real-world thermal management use cases, and two validated alternative parts with documented functional and interface differences.
Technical Context
The SA56004GD,118 integrates a Σ-Δ A/D converter with separate local and remote temperature channels, each using 11-bit two's complement format (LSB = 0.125 °C). Its architecture includes factory-trimmed offset registers for remote diode calibration and independent HIGH/LOW/T_CRIT threshold comparators per channel.
It implements SMBus 2.0 protocol compliance with TIMEOUT support, ALERT and T_CRIT open-drain outputs (requiring external pull-ups), and software-selectable interrupt modes (comparator vs. latched interrupt) controlled via the ALERT Mode (AM) register and Configuration (CON) register bits.
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 at −40 °C to +125 °C, achieved via factory trimming of diode current source/sink |
| Local accuracy | ±2 °C across full operating range (−40 °C to +125 °C) |
| Supply voltage | 3.0 V to 3.6 V - undervoltage lockout prevents erroneous readings below 2.7 V |
| Conversion rate | Programmable from 0.0625 Hz to 26 Hz (via CR register); default = 16 Hz after POR |
| Interface standard | SMBus 2.0 and I²C Standard/Fast-mode compatible - supports ARA response and timeout recovery |
| Operating temperature | −40 °C to +125 °C ambient - qualified for industrial and server thermal environments |
Pinout & Package
SA56004GD,118 is supplied in SO8 (SOT96-1) package: plastic small outline, 8 leads, 3.9 mm body width, surface-mount, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply input | 3.0–3.6 V DC power rail; internal UVLO activates below ~2.7 V |
| D+ | Diode current source (anode) | Provides constant current to forward-bias remote PNP or NPN diode junction |
| D− | Diode current sink (cathode) | Completes remote diode bias path; enables accurate ΔVBE measurement |
| T_CRIT | Critical temperature alarm output | Open-drain, active-low signal - triggers fan activation or system shutdown when local/remote exceeds programmed T_CRIT |
| GND | Power ground reference | Common return for VDD, D+, D−, and internal analog/digital blocks |
| ALERT | General over/undertemperature alarm | Open-drain, active-low interrupt - indicates local/remote out-of-range condition per HIGH/LOW thresholds |
| SDATA | SMBus/I²C bidirectional data line | Open-drain data bus requiring external ~10 kΩ pull-up; supports multi-drop configuration |
| SCLK | SMBus/I²C clock input | Open-drain clock line requiring external ~10 kΩ pull-up; synchronizes all register reads/writes |
Key Features
| Feature | Design Value |
|---|---|
| Remote diode offset calibration | Adjustable via RTOHB/RTOLB registers - corrects for transistor-specific non-ideality and PCB trace resistance |
| Configurable fault detection logic | Fault queue bit (CON[0]) selects single-event or triple-consecutive-out-of-limit triggering for ALERT assertion |
| Flexible interrupt behavior | ALERT Mode (AM[0]) selects latched interrupt (default) or self-clearing comparator mode - no firmware polling required in comparator mode |
| Thermal hysteresis control | T_CRIT hysteresis (TH register) programmable up to 31 °C - prevents oscillation during critical temperature transitions |
| Multi-device SMBus addressing | Factory-programmed 7-bit slave address 1001110b - enables coexistence with up to 7 other SA56004X variants on same bus |
Applications
| Server CPU Thermal Monitoring | Laptop GPU Thermal Protection |
|---|---|
|
Use Scenario: Real-time die temperature tracking of multi-core Xeon or EPYC processors using integrated substrate PNP diodes. IC Role / Device Role / Timing Role: Remote channel measures ΔVBE across CPU diode; local channel monitors sensor junction temperature for self-calibration drift compensation. Use Value: Enables dynamic fan speed control and throttling decisions with ±1 °C accuracy - reduces thermal margin overhead by 3–5 °C versus lower-accuracy sensors. |
Use Scenario: Preventing GPU thermal throttling in thin-and-light notebooks by monitoring discrete 2N3904-based remote diode near graphics die. IC Role / Device Role / Timing Role: SA56004GD,118 acts as dedicated thermal supervisor; ALERT asserts on GPU overtemp, triggering OS-level power management. Use Value: Programmable 0.0625–26 Hz conversion rate allows low-power background monitoring (1 Hz) during idle and high-speed response (16 Hz) during gaming load. |
| Industrial PLC Cabinet Cooling | Network Switch ASIC Thermal Management |
|
Use Scenario: Maintaining safe operating temperature in DIN-rail mounted programmable logic controllers exposed to ambient swings from −25 °C to +70 °C. IC Role / Device Role / Timing Role: Local sensor tracks ambient cabinet air; remote channel monitors heat-generating I/O module diodes via 2N3906 PNP. Use Value: Dual T_CRIT and ALERT outputs enable tiered response - ALERT triggers fan ramp-up; T_CRIT initiates forced shutdown if cooling fails. |
Use Scenario: Protecting 100G Ethernet switch ASICs from thermal runaway during sustained packet forwarding loads. IC Role / Device Role / Timing Role: SA56004GD,118 interfaces directly to baseboard management controller (BMC) via SMBus; provides temperature data for closed-loop thermal policy engine. Use Value: SMBus TIMEOUT protocol ensures bus recovery after transient faults - critical for unattended 24/7 network infrastructure operation. |
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 |
|---|---|---|---|
| LM86IMMX/NOPB | Same SO8 footprint and pinout; identical 11-bit resolution and ±1 °C remote accuracy; lacks T_CRIT hysteresis register (TH) and remote offset low-byte (RTOLB) granularity. | No native T_CRIT hysteresis programming - requires external logic or firmware workarounds for stable critical shutdown behavior. | Choose LM86IMMX/NOPB only if legacy design reuse is prioritized and T_CRIT hysteresis is managed externally. |
| MAX6657ESA+ | SO8 package, SMBus-compatible; remote accuracy ±2 °C (vs. ±1 °C); fixed 16 Hz conversion rate (non-programmable); no remote offset adjustment capability. | Lower remote accuracy limits use in high-density server CPUs where <1 °C margin is required for optimal performance/power trade-off. | Select MAX6657ESA+ for cost-sensitive industrial controls where ±2 °C remote tolerance is acceptable and conversion rate flexibility is unnecessary. |
Compared with LM86IMMX/NOPB and MAX6657ESA+, SA56004GD,118 provides superior remote diode calibration (RTOHB/RTOLB), programmable T_CRIT hysteresis (TH), and adjustable conversion rate - making it the preferred choice for thermally constrained server and networking platforms requiring precise, adaptive thermal response.
Availability
SA56004GD,118 is available at Aetrix Electronics and suitable for server thermal management, laptop GPU protection, industrial PLC cooling, and network switch ASIC monitoring requiring stable component supply across extended product lifecycles.
Supply support for SA56004GD,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 system-level power management.
The SA56004X family was designed specifically for high-reliability thermal supervision in multi-processor computing systems - emphasizing SMBus robustness, remote diode accuracy, and dual-alarm architecture for fail-safe thermal control.
FAQ
What is the factory-programmed SMBus slave address for SA56004GD,118?
The SA56004GD,118 has a fixed 7-bit SMBus slave address of 1001110b (0x4E in hexadecimal), programmed in OTP memory during manufacturing. This address is unique to the GD variant and enables up to eight SA56004X devices (AD through HD) to coexist on the same SMBus without conflict.
Does SA56004GD,118 support remote temperature sensing of both NPN and PNP transistors?
Yes, SA56004GD,118 supports remote sensing of either NPN (e.g., 2N3904) or PNP (e.g., 2N3906) diode-connected transistors. The D+ pin sources current into the anode, and D− sinks current from the cathode - enabling accurate ΔVBE measurement regardless of transistor polarity.
How does the T_CRIT output differ from the ALERT output on SA56004GD,118?
The T_CRIT output on SA56004GD,118 is dedicated to critical overtemperature events - it activates only when local or remote temperature exceeds the independently programmable T_CRIT threshold register value. ALERT responds to broader conditions including HIGH/LOW threshold violations and diode fault detection, making it suitable for general thermal alerts while T_CRIT serves as a last-resort shutdown signal.
Can SA56004GD,118 operate from a 5.0 V supply rail?
No, SA56004GD,118 is specified for 3.0 V to 3.6 V operation only. Applying 5.0 V exceeds the absolute maximum rating and may cause permanent damage. The device includes undervoltage lockout (UVLO) that disables operation below ~2.7 V but provides no overvoltage protection.
Is SA56004GD,118 pin-compatible with the LM86 and MAX6657/8?
Yes, SA56004GD,118 is pin-compatible with the National Semiconductor LM86 and Maxim MAX6657/8 in SO8 package. All share identical pin functions (VDD, D+, D−, T_CRIT, GND, ALERT, SDATA, SCLK), enabling drop-in replacement in existing layouts - provided firmware accounts for differences in register map and feature set.
SA56004GD,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
SA56004GD,118 FAQ
1.How can I place an order for SA56004GD,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA56004GD,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 SA56004GD,118 reliable?
The price and inventory of SA56004GD,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA56004GD,118 is usually 5 days.
3.What payment methods are accepted for SA56004GD,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA56004GD,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA56004GD,118?
SA56004GD,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA56004GD,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 SA56004GD,118?
For technical support, including SA56004GD,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA56004GD,118 requirements.
6.How does Aetrix verify that SA56004GD,118 is sourced from the original manufacturer or authorized distributors?
All SA56004GD,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 SA56004GD,118 meets industry standards.
7.What is the process for return or replacement of SA56004GD,118?
All SA56004GD,118 units undergo pre-shipment inspection (PSI). If there is an issue with SA56004GD,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 SA56004GD,118 part is unused and in its original packaging.
Return procedure for SA56004GD,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA56004GD,118 Tags
-
MCP9700T-E/TT
Microchip Technology
-
MCP9700T-E/LT
Microchip Technology
-
MCP9701T-E/TT
Microchip Technology
-
MCP9701T-E/LT
Microchip Technology
-
TMP235A4DBZR
Texas Instruments
-
MCP9700AT-E/TT
Microchip Technology
-
MCP9700AT-E/LT
Microchip Technology
-
MCP9701AT-E/LT
Microchip Technology
-
MCP9701AT-E/TT
Microchip Technology
,TO-226_straightlead.jpg)
-
LM335Z
STMicroelectronics
-
TMP1075NDRLR
Texas Instruments
-
TMP1075DGKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
