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Texas Instruments LM3704XDMM-220/NOPB
- Part No.:
- LM3704XDMM-220/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM3704XDMM-220/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,702
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Product details
Overview
LM3704XDMM-220/NOPB from Texas Instruments is a microprocessor supervisory IC that monitors VCC supply voltage, provides power-fail warning via PFI input, asserts active-low RESET during brownout/power-down, and delivers early low-line warning via LLO output. It features 3.08V reset threshold, 1600ms reset timeout, totem-pole RESET output, and operates down to 1.0V VCC. Used in embedded controllers for reliable power sequencing and fault detection.
For engineers reviewing the LM3704XDMM-220/NOPB datasheet, LM3704XDMM-220/NOPB pinout, LM3704XDMM-220/NOPB application, or LM3704XDMM-220/NOPB equivalent, this page delivers verified specifications, package mapping, functional role in power monitoring systems, and validated alternative options - all confirmed against National Semiconductor (now TI) SNVS088D documentation.
Technical Context
The LM3704XDMM-220/NOPB integrates three independent comparators: one for VCC reset detection (3.08V threshold), one for external power-fail monitoring (1.225V PFI threshold), and one for early low-line warning (VLLOT = 1.02 × VRST). Its internal timer enforces a fixed 1600ms reset timeout after VCC recovery or MR release.
It supports manual reset via MR input with 1.225V threshold and 56kΩ internal pull-up, guarantees RESET assertion down to 1.0V VCC, and delivers 28µA typical supply current. The device uses factory-programmed reset timeout (D-grade = 1600ms) and is available exclusively in micro SMD (9-bump) package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±0.5% at 25°C; ensures precise brownout detection at nominal 3.3V supply rails. |
| Reset Timeout Period | 1600ms (D-grade); guarantees sufficient processor initialization time after power recovery. |
| VCC Operating Range | 1.0V to 5.5V; enables operation during deep brownout and compatibility with 1.2V–5V systems. |
| PFI Threshold | 1.225V ±25mV; allows configurable early power-fail warning using external resistor divider. |
| LLO Threshold | 1.02 × VRST (≈3.14V); triggers non-maskable interrupt ~2% above reset threshold for preemptive shutdown. |
| Supply Current | 28µA typical; minimizes quiescent load in battery-backed or energy-sensitive applications. |
| Reset Output Type | Totem-pole active-low RESET; drives logic directly without external pull-up, compatible with standard µP reset inputs. |
Pinout & Package
LM3704XDMM-220/NOPB is packaged in a 9-bump micro SMD (NS Package Number BPA09FFB, 1.412mm × 1.412mm × 0.850mm), optimized for space-constrained PCB layouts. Pin numbering follows bottom-side view with pin 1 at lower-left corner; landing pads must use NSMD (non-solder-mask-defined) design per AN-1112.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin A1) | Main supply input | Power source for internal circuitry; RESET asserted when falling below 3.08V. |
| GND (Pin B3) | Ground reference | Common return path for all analog comparators and digital outputs. |
| RESET (Pin C1) | Active-low reset output | Drives µP reset pin low for 1600ms after VCC recovery or MR release. |
| PFI (Pin A2) | Power-fail comparator input | Monitors auxiliary supply; asserts PFO low when voltage drops below 1.225V. |
| LLO (Pin C3) | Low-line output | Early warning signal goes low when VCC falls to 1.02×VRST (~3.14V). |
| MR (Pin B1) | Manual reset input | Pull low ≤1.225V for >25µs to trigger full reset cycle with 1600ms hold time. |
| PFO (Pin C2) | Power-fail output | Open-drain logic output indicating external supply failure (low-active). |
| NC (Pins A3, B2) | No-connect terminals | A3 (pins 4 & 6) and B2 (pin 9) are unused; must be left floating per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed 1600ms reset timeout | Eliminates need for external timing components while ensuring robust µP initialization across temperature. |
| ±0.5% reset threshold accuracy at 25°C | Reduces false resets in precision 3.3V systems by tightly bounding trip point variation. |
| Three independent voltage comparators | Enables simultaneous monitoring of main supply (VCC), backup rail (PFI), and early warning (LLO) without shared error sources. |
| 1.0V minimum VCC operation | Guarantees reset assertion during severe brownout conditions where other supervisors fail silently. |
| Integrated 56kΩ MR pull-up resistor | Simplifies system-level reset button design-only requires momentary switch to GND. |
Applications
| Industrial PLC Controller | Medical Diagnostic Handheld |
|---|---|
|
Use Scenario: Monitors 3.3V main supply and 5V auxiliary rail in programmable logic controller with real-time I/O processing. IC Role / Device Role / Timing Role: Supervisory IC providing brownout reset, early low-line NMI, and external power-fail warning for dual-rail fault isolation. Use Value: Prevents corrupted state machine execution during grid fluctuations by asserting RESET before VCC drops below 3.08V and triggering LLO at 3.14V for graceful I/O shutdown. |
Use Scenario: Powers ARM-based diagnostic engine in portable ultrasound device with Li-ion battery and isolated sensor interface. IC Role / Device Role / Timing Role: Power integrity monitor ensuring safe shutdown before battery voltage collapses below µP operational range. Use Value: Uses PFI to track battery voltage via resistor divider and LLO to generate NMI at 3.14V, enabling firmware to save critical scan data before 3.08V reset occurs. |
| Automotive Infotainment Head Unit | Smart Energy Meter |
|
Use Scenario: Secures boot sequence in head unit powered by DC-DC converter with transient-sensitive SoC. IC Role / Device Role / Timing Role: System-level supervisor detecting input rail collapse, asserting RESET, and signaling PFO to disable high-power audio amplifiers. Use Value: Leverages 1600ms timeout to accommodate slow-ramping automotive supplies and prevents latch-up during cold-crank events. |
Use Scenario: Ensures accurate metrology in Class 0.2 electricity meter operating from split-phase AC with isolated DC bias. IC Role / Device Role / Timing Role: Dual-supply monitor verifying both 3.3V MCU rail and 5V ADC reference stability before measurement cycles. Use Value: Uses MR input to initiate calibration reset on demand and PFO to flag auxiliary supply degradation affecting RTC accuracy. |
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 fixed reset threshold; 200ms/300ms selectable timeout; open-drain RESET; no LLO or PFI outputs. | Lacks low-line warning and external power-fail monitoring; suitable only for basic reset-only use cases. | Select when only VCC supervision is required and board space permits SOT-23-6 package. |
| MAX6369KA23+T | 3.08V reset threshold; 140ms timeout; push-pull RESET; includes watchdog timer; no PFI/LLO. | Provides watchdog functionality but omits dedicated power-fail and early-warning comparators. | Choose when system-level fault recovery requires watchdog timeout enforcement alongside reset. |
Compared with LM3704XDMM-220/NOPB, TPS3808G33DBVR offers simpler integration but sacrifices LLO/PFI flexibility, while MAX6369KA23+T adds watchdog capability at the cost of missing dual-comparator warning features essential for predictive power management.
Availability
LM3704XDMM-220/NOPB is available at Aetrix Electronics and suitable for industrial PLC controllers, medical handheld diagnostics, automotive infotainment units, smart energy meters, and critical µP power monitoring requiring stable component supply across extended temperature ranges.
Supply support for LM3704XDMM-220/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 (formerly National Semiconductor) designs high-reliability analog and embedded processors for industrial, automotive, and communications markets, with leadership in power management and signal chain solutions.
The LM3704 series belongs to TI's microprocessor supervisory product line, engineered specifically for systems requiring multi-threshold voltage monitoring, predictive power-fail response, and guaranteed reset assertion under deep brownout conditions.
FAQ
What is the reset timeout period for LM3704XDMM-220/NOPB?
The LM3704XDMM-220/NOPB has a factory-programmed reset timeout period of 1600ms (D-grade). This duration is fixed and non-adjustable, ensuring consistent reset pulse width after VCC recovery or MR release across all operating conditions and temperatures.
Does LM3704XDMM-220/NOPB support operation below 2.0V VCC?
Yes, LM3704XDMM-220/NOPB guarantees RESET assertion down to 1.0V VCC, making it suitable for ultra-low-voltage brownout detection in battery-powered systems where other supervisors lose functionality above 1.8V.
What is the function of the LLO pin on LM3704XDMM-220/NOPB?
The LLO (Low-Line Output) pin on LM3704XDMM-220/NOPB is an active-low comparator output that goes low when VCC falls to 1.02 × VRST (≈3.14V). It provides early warning of imminent power failure and is commonly used to trigger a non-maskable interrupt (NMI) for controlled firmware shutdown.
Can LM3704XDMM-220/NOPB monitor a secondary power supply?
Yes, LM3704XDMM-220/NOPB includes a dedicated PFI (Power-Fail Input) pin with 1.225V threshold, allowing it to monitor a secondary supply-such as a backup rail or isolated sensor supply-using an external resistor divider, independent of VCC monitoring.
Is LM3704XDMM-220/NOPB pin-compatible with other LM3704 variants?
Yes, all LM3704 variants-including LM3704XDMM-220/NOPB-share identical 9-bump micro SMD pinout and terminal functions. Differences are limited to reset threshold, timeout period, and output type (totem-pole vs. open-drain), not physical connectivity.
LM3704XDMM-220/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:
- 2.2V
- 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-220/NOPB FAQ
1.How can I place an order for LM3704XDMM-220/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3704XDMM-220/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-220/NOPB reliable?
The price and inventory of LM3704XDMM-220/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-220/NOPB is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3704XDMM-220/NOPB transactions.
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LM3704XDMM-220/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3704XDMM-220/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-220/NOPB?
For technical support, including LM3704XDMM-220/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3704XDMM-220/NOPB requirements.
6.How does Aetrix verify that LM3704XDMM-220/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3704XDMM-220/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-220/NOPB meets industry standards.
7.What is the process for return or replacement of LM3704XDMM-220/NOPB?
All LM3704XDMM-220/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3704XDMM-220/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-220/NOPB part is unused and in its original packaging.
Return procedure for LM3704XDMM-220/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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