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Texas Instruments LM3704XDMM-232/NOPB
- Part No.:
- LM3704XDMM-232/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM3704XDMM-232/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,649
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Product details
Overview
LM3704XDMM-232/NOPB from Texas Instruments is a microprocessor supervisory IC with totem-pole active-low RESET output, 1600 ms reset timeout period, 3.08 V reset threshold, and integrated power-fail (PFI), manual-reset (MR), and low-line (LLO) comparators - used for reliable power monitoring in embedded controllers and critical µP systems.
For engineers reviewing the LM3704XDMM-232/NOPB datasheet, LM3704XDMM-232/NOPB pinout, LM3704XDMM-232/NOPB application, or LM3704XDMM-232/NOPB equivalent, key selection criteria include reset threshold accuracy (±0.5% at 25°C), VCC operation down to 1.0 V, 28 µA supply current, and micro SMD-9 package compatibility with space-constrained industrial designs.
Technical Context
The LM3704XDMM-232/NOPB implements three independent voltage comparators: one for reset assertion at 3.08 V (with ±2% tolerance over −40°C to +85°C), one for power-fail warning at 1.225 V (PFI input), and one for early low-line detection at 1.02×VRST (LLO output). All comparators feature built-in hysteresis (0.0032×VRST).
It integrates a factory-programmed 1600 ms reset timeout timer, a debounced manual-reset input with 56 kΩ internal pull-up and 1.225 V threshold, and a totem-pole RESET output guaranteed functional down to VCC = 1.0 V - enabling robust brownout recovery without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08 V ±0.5% at 25°C; ensures precise power-on reset initiation for 3.3 V systems |
| Reset Timeout Period | 1600 ms; provides sufficient hold time for processor initialization and peripheral stabilization | VCC Operating Range | 1.0 V to 5.5 V; supports deep brownout detection and low-voltage operation |
| Supply Current | 28 µA typical; enables long battery life in always-on monitoring applications |
| Power-Fail Input Threshold | 1.225 V ±25 mV; allows configurable early warning via external resistor divider |
| Low-Line Output Threshold | 1.02 × VRST (≈3.14 V); triggers NMI before reset activation for graceful shutdown |
| Manual Reset Threshold | 1.225 V; compatible with standard logic levels and external push-button interfaces |
Pinout & Package
LM3704XDMM-232/NOPB is packaged in a 9-bump micro SMD (NS Package Number BPA09FFB), measuring 1.412 mm × 1.412 mm × 0.850 mm, with non-solder-mask-defined (NSMD) landing pads per AN-1112.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | Primary supply rail monitored for reset; supports operation down to 1.0 V |
| GND | Ground reference | Common return for all comparators, outputs, and internal circuitry |
| RESET | Active-low reset output | Totem-pole output asserted low during power-up/down/brownout; holds for 1600 ms after VCC recovery |
| PFI | Power-fail comparator input | Accepts external divided voltage; asserts PFO when below 1.225 V for advanced supply warning |
| LLO | Low-line output | Early warning signal going low at 1.02×VRST; used for NMI generation prior to reset |
| MR | Manual-reset input | Debounced input with 56 kΩ internal pull-up; initiates reset when pulled below 1.225 V |
| NC | No-connect terminals | Pins A1, A3 (2, 4/6), and B2 (9) are unconnected; must be left floating per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed 1600 ms timeout | Eliminates need for external RC timing network; ensures consistent reset duration across units |
| Three independent comparators | Enables simultaneous monitoring of main supply (VCC), auxiliary supply (PFI), and early warning (LLO) without shared thresholds |
| 1.0 V minimum VCC operation | Guarantees reset assertion integrity even during severe brownout conditions |
| ±0.5% reset threshold accuracy (25°C) | Reduces design margin requirements and improves system-level voltage tolerance allocation |
| Micro SMD-9 footprint | Minimizes PCB area (2.0 mm²) for portable and high-density embedded applications |
Applications
| Embedded Controller Monitoring | Automotive Body Control Module |
|---|---|
Use Scenario: Real-time supervision of 3.3 V core supply in ARM-based industrial controller with battery backup. IC Role / Device Role / Timing Role: Primary reset supervisor asserting active-low RESET during VCC drop below 3.08 V; LLO triggers NMI for controlled firmware save before shutdown. Use Value: Prevents code corruption during intermittent power loss using 1600 ms timeout and 1.0 V operational floor. | Use Scenario: Power integrity monitoring in LIN-connected door module with dual-supply architecture (5 V MCU + 3.3 V sensor rail). IC Role / Device Role / Timing Role: Monitors main 5 V rail via VCC and auxiliary 3.3 V rail via PFI input; generates separate PFO and RESET signals. Use Value: Enables early fault detection on secondary rail without adding discrete comparators - reducing BOM count by one IC. |
| Critical µP Power Monitoring | Intelligent Power Meter |
Use Scenario: Ensuring deterministic boot sequence in utility-grade meter with isolated RS-485 interface and EEPROM logging. IC Role / Device Role / Timing Role: Generates clean reset pulse synchronized to VCC rise; MR input tied to front-panel reset button with hardware debounce. Use Value: Eliminates need for external RC reset circuit and software debounce, improving field reliability and certification compliance. | Use Scenario: Battery-backed real-time clock and metrology ASIC supervision in Class 0.5 smart meter operating across −25°C to +70°C. IC Role / Device Role / Timing Role: Provides temperature-stable reset (±2% VRST over full range) and low-quiescent-current (28 µA) monitoring during battery-only operation. Use Value: Extends backup battery life beyond 5 years while maintaining accurate power-fail warning via LLO output. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | Fixed 3.3 V reset threshold; 200 ms default timeout (adjustable via capacitor); open-drain output | Lacks dedicated PFI and LLO outputs; requires external components for multi-rail monitoring | Preferred when only single-rail reset is needed and adjustable timeout is required |
| MAX6369KA29+T | 3.08 V reset threshold; 140 ms timeout; includes watchdog timer and programmable reset delay | Includes watchdog functionality but no LLO or PFI inputs; different pinout and package (SOT23-6) | Chosen when system-level watchdog supervision is mandatory alongside reset |
Compared with LM3704XDMM-232/NOPB, TPS3808G33DBVR offers timeout flexibility but omits dual-comparator capability, while MAX6369KA29+T adds watchdog functionality at the cost of losing early power-fail warning - making LM3704XDMM-232/NOPB uniquely suited for applications requiring coordinated reset, PFI, and LLO signaling in minimal area.
Availability
LM3704XDMM-232/NOPB is available at Aetrix Electronics and suitable for embedded controllers, automotive body electronics, critical µP power monitoring, and intelligent metering applications requiring stable component supply, long-term lifecycle support, and verified micro SMD assembly compatibility.
Supply support for LM3704XDMM-232/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 delivering analog and embedded processing solutions for industrial, automotive, personal electronics, and communications markets.
The LM3704 series belongs to TI's precision supervisory IC product line, designed specifically for high-reliability power monitoring in systems where deterministic reset behavior, multi-rail supervision, and early warning capability are essential.
FAQ
What is the reset timeout period for LM3704XDMM-232/NOPB?
The LM3704XDMM-232/NOPB has a factory-programmed reset timeout period of 1600 ms. This fixed duration ensures the RESET output remains asserted long enough for complete microprocessor initialization and peripheral stabilization after power recovery, without requiring external timing components. The value is laser-trimmed during manufacturing and is specified across the full temperature range (−40°C to +85°C).
Does LM3704XDMM-232/NOPB support operation below 2.0 V?
Yes, LM3704XDMM-232/NOPB guarantees RESET assertion down to VCC = 1.0 V, enabling reliable brownout detection in ultra-low-voltage scenarios. Its internal comparators and totem-pole driver remain functional throughout the 1.0 V to 5.5 V operating range, and the 28 µA supply current ensures minimal loading on weak or battery-depleted supplies.
What is the function of the LLO pin on LM3704XDMM-232/NOPB?
The LLO (Low-Line Output) pin on LM3704XDMM-232/NOPB is an active-low early warning signal that goes low when VCC falls to 1.02 × VRST (≈3.14 V for the 3.08 V threshold). It provides a non-maskable interrupt (NMI) trigger before RESET activates, allowing firmware to perform last-chance data saves or state preservation - a capability not replicated by standard reset supervisors.
Can LM3704XDMM-232/NOPB monitor a secondary power rail?
Yes, LM3704XDMM-232/NOPB can monitor a secondary power rail using its dedicated PFI (Power-Fail Input) pin, which compares an external voltage against a precise 1.225 V internal reference. When the divided secondary rail voltage drops below this threshold, the PFO output goes low - enabling independent supervision of auxiliary supplies such as 5 V, 2.5 V, or 1.8 V rails without additional ICs.
Is LM3704XDMM-232/NOPB pin-compatible with other LM3704 variants?
LM3704XDMM-232/NOPB shares identical pinout and electrical behavior with all LM3704 micro SMD-9 variants (e.g., LM3704XBMM-232, LM3704XCMM-232), differing only in factory-programmed reset timeout (1600 ms vs. 28 ms or 200 ms) and reset threshold (3.08 V fixed). No PCB layout change is required when substituting within the same package type, provided timing and threshold requirements align.
LM3704XDMM-232/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:
- 2.32V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 1.12s Minimum
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSSOP
LM3704XDMM-232/NOPB FAQ
1.How can I place an order for LM3704XDMM-232/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3704XDMM-232/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 LM3704XDMM-232/NOPB reliable?
The price and inventory of LM3704XDMM-232/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3704XDMM-232/NOPB is usually 5 days.
3.What payment methods are accepted for LM3704XDMM-232/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3704XDMM-232/NOPB transactions.
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LM3704XDMM-232/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3704XDMM-232/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 LM3704XDMM-232/NOPB?
For technical support, including LM3704XDMM-232/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3704XDMM-232/NOPB requirements.
6.How does Aetrix verify that LM3704XDMM-232/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3704XDMM-232/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 LM3704XDMM-232/NOPB meets industry standards.
7.What is the process for return or replacement of LM3704XDMM-232/NOPB?
All LM3704XDMM-232/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3704XDMM-232/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 LM3704XDMM-232/NOPB part is unused and in its original packaging.
Return procedure for LM3704XDMM-232/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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