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Texas Instruments LM3704XCMM-308/NOPB
- Part No.:
- LM3704XCMM-308/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM3704XCMM-308/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,529
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Product details
Overview
LM3704XCMM-308/NOPB from Texas Instruments is a precision voltage supervisor IC with fixed 3.08 V reset threshold, 200 ms reset timeout, ±0.5% room-temperature threshold accuracy, and integrated power-fail input (PFI), low-line output (LLO), and manual reset (MR) - used in embedded microprocessor power monitoring to prevent code corruption during brownout.
For engineers reviewing the LM3704XCMM-308/NOPB datasheet, LM3704XCMM-308/NOPB pinout, LM3704XCMM-308/NOPB application, or LM3704XCMM-308/NOPB equivalent, key selection considerations include its VSSOP-10 package, push-pull RESET output (denoted by 'X'), 28 µA supply current, and dual-supply monitoring capability via PFI/LLO for early warning and fault isolation in safety-critical systems.
Technical Context
The LM3704XCMM-308/NOPB integrates three independent comparators: a main reset comparator with 3.08 V threshold and 200 ms one-shot timer, a 1.225 V power-fail comparator (PFI→PFO), and a low-line comparator (VCC→LLO at 1.02×VRST). All thresholds feature ±2% accuracy over –40°C to +85°C and 0.0032×VRST hysteresis.
Its push-pull RESET output drives high without external pull-up, while MR includes internal 56 kΩ pullup and 12 µs propagation delay; PFO and LLO are open-drain compatible but configured as push-pull in this 'X' variant per TI nomenclature. The device operates from 1 V to 5.5 V VCC and draws only 28 µA typical supply current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08 V ±0.5% at 25°C; ensures reliable µP reset initiation when main supply falls below nominal 3.3 V rail. |
| Reset Timeout Period | 200 ms typ. (140–280 ms over temp); guarantees sufficient hold time for processor initialization after power recovery. |
| VCC Supply Current | 28 µA typ. at 25°C; enables ultra-low-power operation in battery-backed or energy-sensitive systems. |
| Power-Fail Input Threshold | 1.225 V ±0.025 V; allows configurable upstream supply monitoring via external resistor divider for predictive brownout detection. |
| Low-Line Output Threshold | 1.02 × VRST (≈3.14 V); triggers NMI interrupt 2% before reset threshold breach, enabling graceful shutdown or data save. |
| Manual Reset Input Threshold | 1.225 V with 56 kΩ internal pullup; supports direct switch connection without external biasing components. |
| Operating Temperature | –40°C to +85°C; qualified for industrial and automotive under-hood environments requiring extended thermal stability. |
Pinout & Package
VSSOP-10 (DGS) package: 3.00 mm × 3.00 mm body, 0.5 mm pitch, exposed pad not present, RoHS-compliant Sn lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Power supply input | Main supply rail (1–5.5 V); powers all internal comparators and logic; RESET valid down to 1 V. |
| 2 - MR | Manual reset input | Active-low trigger; asserts RESET when pulled below 1.225 V for >25 µs; internal 56 kΩ pullup eliminates external resistor. |
| 3 - PFI | Power-fail comparator input | Monitors secondary supply via resistor divider; trips PFO when voltage falls below 1.225 V for upstream failure detection. |
| 4, 6, 9 - NC | No connection | Unbonded pins; must remain unconnected per TI design; no electrical function or thermal role. |
| 5 - GND | Ground reference | Common return for all analog and digital circuitry; requires low-impedance PCB connection to minimize noise coupling. |
| 7 - LLO | Low-line logic output | Push-pull output asserting low at 1.02×VRST; provides non-maskable interrupt for early power-fail warning. |
| 8 - PFO | Power-fail logic output | Push-pull output asserting low when PFI < 1.225 V; signals upstream supply collapse independent of VCC. |
| 10 - RESET | Reset logic output | Push-pull active-low reset signal; holds low for 200 ms after VCC rise or MR release; no external pull-up required. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.08 V reset threshold | Eliminates external resistor network; reduces BOM count and layout area while guaranteeing ±0.5% accuracy at 25°C. |
| Integrated power-fail comparator | Enables monitoring of a second supply (e.g., raw battery or auxiliary rail) with dedicated 1.225 V reference and PFO output. |
| Low-line output (LLO) | Provides early-warning interrupt at 1.02×VRST - 2% above reset threshold - allowing firmware to initiate safe state transitions. |
| Manual reset with internal pullup | Supports direct mechanical switch connection; removes need for external pullup resistor and debouncing circuitry. |
| 200 ms reset timeout | Guarantees minimum reset assertion duration compliant with ARM Cortex-M and Intel x86 processor startup timing requirements. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
|
Use Scenario: Monitors 3.3 V microcontroller supply and 12 V battery rail in programmable logic controller cabinets exposed to wide temperature swings and EMI. IC Role / Device Role / Timing Role: Voltage supervisor providing primary reset, early brownout warning (LLO), and backup supply fault detection (PFI→PFO). Use Value: Prevents spurious reboots during transient dips; enables deterministic firmware save-on-fail using LLO-triggered NMI before VCC crosses 3.08 V. |
Use Scenario: Embedded in door module controlling window lift, mirror fold, and lighting functions powered by vehicle battery and local LDO. IC Role / Device Role / Timing Role: Dual-rail monitor asserting RESET on main 3.3 V rail and signaling battery sag (<11.5 V) via PFI divider to trigger load shedding. Use Value: Extends system uptime by distinguishing between brief cranking dips and true battery failure, avoiding unnecessary module resets. |
| Medical Infusion Pump | Smart Energy Meter |
|
Use Scenario: Ensures fail-safe operation of ARM-based pump controller during AC/DC adapter dropout or battery transition events. IC Role / Device Role / Timing Role: Supervises main 3.3 V rail and detects backup supercapacitor discharge via PFI to initiate controlled drug delivery halt. Use Value: Meets IEC 62304 Class C software safety requirements by guaranteeing reset assertion within 200 ms of undervoltage and enabling audit-trail logging via LLO interrupt. |
Use Scenario: Monitors isolated 3.3 V MCU supply and 5 V metering ASIC rail in ANSI C12.20-certified electricity meters deployed in outdoor enclosures. IC Role / Device Role / Timing Role: Provides synchronized reset for both domains and uses PFO to flag tamper-induced supply interruption for secure event logging. Use Value: Supports ANSI C12.22 security protocols by generating authenticated power-event timestamps triggered by PFO edge detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G30DBVR | 3.0 V reset threshold, 200 ms timeout, but only single-supply monitoring; no PFI or LLO outputs. | Lacks dual-rail warning capability; suitable only where early warning or secondary supply monitoring is unnecessary. | Select when cost sensitivity outweighs need for PFI/LLO; requires external circuitry for equivalent functionality. |
| MAX6326UT308+T | 3.08 V threshold, 200 ms timeout, open-drain RESET; includes watchdog timer but no PFI or LLO. | Watchdog adds supervision of firmware execution but removes ability to monitor auxiliary supplies or generate NMI warnings. | Choose if system-level software hang detection is prioritized over hardware-level multi-rail fault isolation. |
Compared with TPS3808G30DBVR and MAX6326UT308+T, the LM3704XCMM-308/NOPB uniquely delivers integrated PFI and LLO in a single VSSOP-10 package - enabling simultaneous primary reset, upstream supply monitoring, and early-warning NMI without external components or timing compromises.
Availability
LM3704XCMM-308/NOPB is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical infusion pumps, smart energy meters, and telecom remote terminal units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM3704XCMM-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 leader specializing in analog, embedded processing, and power management technologies, with decades of experience in high-reliability supervisory circuits.
The LM3704XCMM-308/NOPB belongs to TI's precision voltage supervisor product line, designed specifically for systems demanding multi-rail monitoring, early fault detection, and minimal external component count in space-constrained industrial and automotive applications.
FAQ
What is the reset threshold voltage of the LM3704XCMM-308/NOPB?
The LM3704XCMM-308/NOPB has a factory-trimmed reset threshold of 3.08 V with ±0.5% accuracy at 25°C and ±2% over the full –40°C to +85°C operating range. This precise threshold ensures reliable reset assertion for 3.3 V microprocessor rails without external calibration components.
Does the LM3704XCMM-308/NOPB support monitoring of multiple supply rails?
Yes - the LM3704XCMM-308/NOPB supports dual-rail monitoring: the main VCC rail is supervised by its 3.08 V reset comparator, while the PFI pin accepts an external voltage divider to monitor a second supply (e.g., battery or auxiliary rail) against a 1.225 V internal reference, triggering the PFO output independently.
What is the function of the LLO pin on the LM3704XCMM-308/NOPB?
The LLO (Low-Line Output) pin on the LM3704XCMM-308/NOPB is a push-pull output that goes low when VCC falls below 1.02 × VRST (≈3.14 V), providing an early-warning non-maskable interrupt (NMI) to the microprocessor 2% before the main reset threshold is breached - enabling critical data save or state preservation.
Is an external pull-up resistor required for the MR pin of the LM3704XCMM-308/NOPB?
No - the LM3704XCMM-308/NOPB includes an internal 56 kΩ pull-up resistor on the MR pin, allowing direct connection to a momentary switch tied to ground. No external biasing components are needed, simplifying board layout and reducing BOM count.
What package type and dimensions does the LM3704XCMM-308/NOPB use?
The LM3704XCMM-308/NOPB is housed in a VSSOP-10 (DGS) package measuring 3.00 mm × 3.00 mm with 0.5 mm lead pitch. It features Sn lead finish, MSL Level-1 rating, and is optimized for high-density PCB layouts in industrial and automotive applications.
LM3704XCMM-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:
- Active
- 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 Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSSOP
LM3704XCMM-308/NOPB FAQ
1.How can I place an order for LM3704XCMM-308/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3704XCMM-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 LM3704XCMM-308/NOPB reliable?
The price and inventory of LM3704XCMM-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 LM3704XCMM-308/NOPB is usually 5 days.
3.What payment methods are accepted for LM3704XCMM-308/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3704XCMM-308/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3704XCMM-308/NOPB?
LM3704XCMM-308/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3704XCMM-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 LM3704XCMM-308/NOPB?
For technical support, including LM3704XCMM-308/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3704XCMM-308/NOPB requirements.
6.How does Aetrix verify that LM3704XCMM-308/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3704XCMM-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 LM3704XCMM-308/NOPB meets industry standards.
7.What is the process for return or replacement of LM3704XCMM-308/NOPB?
All LM3704XCMM-308/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3704XCMM-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 LM3704XCMM-308/NOPB part is unused and in its original packaging.
Return procedure for LM3704XCMM-308/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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