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Texas Instruments LM3711XQMM-308/NOPB
- Part No.:
- LM3711XQMM-308/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM3711XQMM-308/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 10VSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM3711XQMM-308/NOPB from Texas Instruments is a microprocessor supervisory IC with 3.08V factory-programmed reset threshold, active-high RESET output, power-fail comparator (PFI/PFO), low-line warning (LLO), manual reset (MR) input, and watchdog timer (WDI). It operates from 1.2V to 5.5V VCC, asserts reset down to 1.2V, and draws only 28 µA quiescent current. It is used in embedded controllers and automotive systems for reliable power-up/down and brownout protection.
For engineers reviewing the LM3711XQMM-308/NOPB datasheet, LM3711XQMM-308/NOPB pinout, LM3711XQMM-308/NOPB application, or LM3711XQMM-308/NOPB equivalent, key selection criteria include its active-high RESET logic, ±0.5% reset threshold accuracy at room temperature, factory-set 3.08V threshold, VSSOP-10 package compatibility, and integrated LLO early-warning output for non-maskable interrupt generation.
Technical Context
The LM3711XQMM-308/NOPB implements a precision bandgap-based voltage monitor with hysteresis (0.0032·VRST) and independent comparators for reset, power-fail (1.225V reference), and low-line detection (VLLOT = 1.02·VRST). Its watchdog timer monitors WDI transitions with four programmable timeout periods (6.2 ms typical).
Reset assertion is triggered by VCC falling below 3.08V, MR pulled below 1.225V, or watchdog timeout; RESET remains high until VCC exceeds 3.08V for ≥1.4 ms (tRP). The PFO and LLO outputs are open-drain, while RESET is totem-pole with VOH ≥0.8·VCC and VOL ≤0.4V at 3.2mA sink.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±0.5% at 25°C; ensures deterministic reset initiation during 3.3V supply brownout. |
| RESET Output Type | Active-high totem-pole; drives high without external pull-up, simplifies interface to µP NMI or reset-enable inputs. |
| VCC Operating Range | 1.2V to 5.5V; supports operation across 1.8V, 2.5V, 3.3V, and 5V logic domains. |
| Supply Current | 28 µA typical; enables battery-backed or ultra-low-power monitoring without significant drain. |
| Low-Line Threshold | 1.02 × 3.08V = 3.14V; triggers LLO ~60 mV above reset threshold for early warning before system reset. |
| Watchdog Timeout | 6.2 ms typical (E/F/G/H option); detects µP lockup within sub-10ms window for time-critical safety functions. |
| Reset Timeout Period | 1.4 ms typical; holds RESET high long enough to ensure full µP initialization after power recovery. |
Pinout & Package
VSSOP-10 (DGS) package: 3.0 mm × 3.0 mm, 0.5 mm pitch, 1.1 mm max height, RoHS-compliant tin (SN) lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Manual Reset Input | Active-low input with 1.225V threshold and internal 56 kΩ pull-up; debounced for noise immunity and direct pushbutton interfacing. |
| 2 (VCC) | Power Supply Input | Main supply rail input; powers all internal comparators, timer, and outputs; valid from 1.2V to 5.5V. |
| 3 (PFI) | Power-Fail Comparator Input | Monitors external supply via resistor divider; trips PFO when voltage falls below 1.225V reference. |
| 4 (WDI) | Watchdog Input | High-impedance transition detector; resets internal timer on each edge; timeout asserts RESET if µP stalls. |
| 5 (NC) | No Connect | Factory test pin; must be left floating per datasheet; no electrical function in application circuit. |
| 6 (GND) | Ground Reference | Analog and digital ground return; requires low-impedance connection to minimize noise coupling into comparators. |
| 7 (LLO) | Low-Line Output | Open-drain early-warning signal; goes low when VCC drops to 3.14V, enabling NMI generation before reset. |
| 8 (PFO) | Power-Fail Output | Open-drain logic output; indicates PFI < 1.225V; used for backup supply enable or system shutdown sequencing. |
| 9 (NC) | No Connect | Second factory test pin; must remain unconnected; not bonded internally in production units. |
| 10 (RESET) | Active-High Reset Output | Totem-pole output; drives high actively; eliminates need for external pull-up resistor on µP reset line. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-Programmed 3.08V Threshold | Eliminates external resistor network; guarantees ±0.5% accuracy at 25°C for 3.3V systems. |
| Active-High RESET Output | Direct interface to processors requiring high-active reset (e.g., ARM Cortex-M series), reducing BOM count. |
| Integrated Low-Line Output (LLO) | Provides 60 mV advance warning before reset activation, enabling graceful firmware save or state preservation. |
| Watchdog Timer with 6.2 ms Default Timeout | Detects µP hang within 6.2 ms-critical for real-time control loops and functional safety compliance. |
| 28 µA Quiescent Current | Enables permanent installation in battery-powered devices (e.g., telematics, sensor nodes) without measurable runtime impact. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors 3.3V I/O supply and 5V MCU core rail in a programmable logic controller exposed to wide ambient temperature swings and EMI. IC Role / Device Role / Timing Role: Supervises power integrity, asserts RESET on brownout, and triggers LLO to initiate EEPROM write-protection before voltage collapse. Use Value: Prevents corrupted configuration data during transient undervoltage events common in factory floor power distribution. | Use Scenario: Embedded in door module electronics to supervise 12V-to-3.3V DC/DC converter output and detect battery voltage sag during cold cranking. IC Role / Device Role / Timing Role: Uses PFI to monitor raw 12V bus via resistor divider; asserts PFO to disable non-critical loads and LLO to wake microcontroller for diagnostics. Use Value: Enables fail-safe behavior during engine start-preserving memory contents and avoiding spurious actuator commands. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Ensures safe shutdown and state retention in battery-backed infusion pump controller during AC power loss or battery depletion. IC Role / Device Role / Timing Role: Monitors main 3.3V rail; uses MR for emergency stop button interface; WDI validates motor control loop execution. Use Value: Guarantees immediate cessation of fluid delivery upon detected fault, meeting IEC 62304 Class C software safety requirements. | Use Scenario: Supervises isolated 3.3V supply powering metrology ASIC and communication interface in utility-grade electricity meter. IC Role / Device Role / Timing Role: Generates NMI via LLO when VCC drops to 3.14V; initiates secure flash write of last valid kWh reading before reset. Use Value: Eliminates data loss during grid instability events, satisfying ANSI C12.20 accuracy and data integrity mandates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | 3.3V reset threshold, 350-ms fixed timeout, no LLO or PFI outputs, SOT-23-6 package. | Lacks early warning and dual-supply monitoring; suitable only for basic reset-only use cases. | Select when footprint and cost constrain design and advanced supervision features are unnecessary. |
| MAX6369KA29+T | 2.93V reset threshold, 140-ms watchdog timeout, open-drain RESET, SO-8 package, no LLO. | Higher reset threshold tolerance (±2.5%), no low-line warning; requires external pull-up on RESET. | Choose for legacy designs using Maxim's SO-8 footprint and where 2.93V threshold better matches 3.0V system rails. |
Compared with TPS3808G33DBVR and MAX6369KA29+T, the LM3711XQMM-308/NOPB uniquely integrates LLO for NMI-based early response, PFI for auxiliary supply monitoring, and active-high RESET-enabling single-chip supervision of complex multi-rail embedded systems without external logic.
Availability
LM3711XQMM-308/NOPB is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical infusion pumps, smart energy meters, and critical µP power monitoring requiring stable component supply and long-term lifecycle support.
Supply support for LM3711XQMM-308/NOPB 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
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LM3711XQMM-308/NOPB belongs to TI's microprocessor supervisory circuits product line, designed specifically for robust, low-power power supply monitoring in safety-critical embedded systems where deterministic reset timing and early fault detection are mandatory.
FAQ
What is the reset threshold voltage of the LM3711XQMM-308/NOPB?
The LM3711XQMM-308/NOPB has a factory-programmed reset threshold of 3.08V with ±0.5% accuracy at 25°C and ±2% over −40°C to +85°C. This precise threshold ensures reliable reset initiation for standard 3.3V supply rails during brownout conditions, and the LM3711XQMM-308/NOPB maintains reset assertion down to VCC = 1.2V.
Does the LM3711XQMM-308/NOPB provide an active-high or active-low reset output?
LM3711XQMM-308/NOPB provides an active-high RESET output with totem-pole drive capability. Unlike open-drain alternatives, it actively drives high without requiring an external pull-up resistor, simplifying interface to microprocessors that require high-active reset signals such as many ARM Cortex-M devices. The LM3711XQMM-308/NOPB RESET output meets VOH ≥0.8·VCC and VOL ≤0.4V specifications under load.
What is the function of the LLO pin on the LM3711XQMM-308/NOPB?
The LLO (Low-Line Output) pin on the LM3711XQMM-308/NOPB is an open-drain early-warning signal that goes low when VCC falls to 1.02 × 3.08V = 3.14V-60 mV above the reset threshold. This allows the LM3711XQMM-308/NOPB to generate a non-maskable interrupt (NMI) before system reset, enabling firmware to save critical data or enter safe state. The LM3711XQMM-308/NOPB LLO hysteresis is 0.0032 × VRST for noise immunity.
Can the LM3711XQMM-308/NOPB monitor a secondary power supply?
Yes, the LM3711XQMM-308/NOPB can monitor a secondary power supply using its PFI (Power-Fail Input) pin, which compares an external voltage-typically derived from a resistor divider-to an internal 1.225V reference. When the divided voltage falls below 1.225V, PFO goes low. This enables the LM3711XQMM-308/NOPB to supervise auxiliary rails like 12V battery input or isolated DC/DC outputs independently of VCC, and the LM3711XQMM-308/NOPB datasheet confirms this functionality is fully decoupled from the main reset comparator.
What watchdog timeout period is configured in the LM3711XQMM-308/NOPB?
The LM3711XQMM-308/NOPB is factory-programmed with the E/F/G/H watchdog timeout option, yielding a typical watchdog timeout period of 6.2 ms. This value is confirmed in the Electrical Characteristics table of the SNVS150E datasheet and is optimized for detecting µP lockup in real-time control applications. The LM3711XQMM-308/NOPB watchdog timer resets on each WDI transition and asserts RESET if no activity occurs for ≥6.2 ms.
LM3711XQMM-308/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSSOP
LM3711XQMM-308/NOPB FAQ
1.How can I place an order for LM3711XQMM-308/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3711XQMM-308/NOPB 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 LM3711XQMM-308/NOPB reliable?
The price and inventory of LM3711XQMM-308/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3711XQMM-308/NOPB is usually 5 days.
3.What payment methods are accepted for LM3711XQMM-308/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3711XQMM-308/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3711XQMM-308/NOPB?
LM3711XQMM-308/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3711XQMM-308/NOPB 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 LM3711XQMM-308/NOPB?
For technical support, including LM3711XQMM-308/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3711XQMM-308/NOPB requirements.
6.How does Aetrix verify that LM3711XQMM-308/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3711XQMM-308/NOPB 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 LM3711XQMM-308/NOPB meets industry standards.
7.What is the process for return or replacement of LM3711XQMM-308/NOPB?
All LM3711XQMM-308/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3711XQMM-308/NOPB, 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 LM3711XQMM-308/NOPB part is unused and in its original packaging.
Return procedure for LM3711XQMM-308/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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