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Texas Instruments LM3704YCMMX-308/NOPB
- Part No.:
- LM3704YCMMX-308/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM3704YCMMX-308/NOPB.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,148
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Product details
Overview
LM3704YCMMX-308/NOPB from Texas Instruments is a voltage supervisor IC with 3.08 V reset threshold, ±2% accuracy over temperature, 200 ms reset timeout, manual reset (MR) input, and dual independent outputs: active-low RESET and open-drain PFO/LLO for power-fail and low-line warning. It monitors VCC in embedded microprocessor systems requiring reliable brownout detection and early power-fail signaling.
For engineers reviewing the LM3704YCMMX-308/NOPB datasheet, LM3704YCMMX-308/NOPB pinout, LM3704YCMMX-308/NOPB application, or LM3704YCMMX-308/NOPB equivalent, key selection criteria include its 3.08 V fixed reset threshold, 28 µA supply current, 1.225 V PFI comparator reference, LLO activation at 1.02 × VRST, and VSSOP-10 package compatibility with space-constrained industrial and automotive control boards.
Technical Context
The LM3704YCMMX-308/NOPB integrates three independent comparators: one for VCC reset detection (3.08 V threshold), one for PFI (1.225 V internal reference), and one for LLO (1.02 × VRST). Its reset logic includes a 200 ms one-shot timer with hysteresis (±0.5% at 25°C, ±2% over –40°C to 85°C) and MR debouncing with 56 kΩ internal pullup.
It delivers push-pull RESET and open-drain PFO/LLO outputs-confirmed by TI's nomenclature table where "Y" denotes open-drain configuration. The device operates across 1 V to 5.5 V VCC and draws only 28 µA typical supply current, enabling battery-backed monitoring without significant load impact.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08 V ±2% over –40°C to 85°C - ensures reliable brownout detection across industrial temperature range |
| Reset Timeout Period | 200 ms typ. - guarantees sufficient processor initialization time after power recovery | Supply Current | 28 µA typ. at 25°C - enables long-term operation in battery-supervised systems |
| PFI Threshold | 1.225 V ±0.025 V - provides stable reference for external voltage divider-based secondary rail monitoring |
| LLO Activation Point | VCC falling to 1.02 × VRST (≈3.14 V) - delivers early non-maskable interrupt before reset assertion |
| Output Configuration | RESET: push-pull; PFO/LLO: open-drain - supports wired-OR fault signaling and flexible MCU interface |
| Operating Temperature | –40°C to +85°C - qualified for automotive and industrial ambient environments |
Pinout & Package
LM3704YCMMX-308/NOPB is housed in a 10-pin VSSOP (DGS) package measuring 3.00 mm × 3.00 mm, with exposed thermal pad not connected internally. Pin 1 is located in Quadrant Q1 per TI tape-and-reel specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VCC | Power supply input | Primary supply rail (1–5.5 V); powers all internal comparators and logic |
| 2 MR | Manual reset input | Active-low trigger with 1.225 V threshold and 56 kΩ internal pullup; debounced for switch interfacing |
| 3 PFI | Power-fail comparator input | Monitors secondary supply via external resistor divider; asserts PFO when <1.225 V |
| 4 NC | No connection | Unbonded die pad; must be left floating or grounded per layout guidelines |
| 5 GND | Ground reference | Common return for all analog and digital functions; requires low-impedance PCB connection |
| 6 NC | No connection | Unbonded die pad; must be left floating or grounded |
| 7 LLO | Low-line output | Open-drain early-warning signal activated when VCC falls below 1.02 × VRST |
| 8 PFO | Power-fail output | Open-drain output asserting low when PFI <1.225 V; independent of VCC status |
| 9 NC | No connection | Factory test pin; must remain unconnected in application |
| 10 RESET | Reset logic output | Push-pull active-low output; holds low for 200 ms after VCC rise or MR release |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.08 V reset threshold | Eliminates external resistor network; reduces BOM count and layout area in cost-sensitive designs |
| Independent PFI comparator | Enables monitoring of upstream supplies (e.g., raw battery or unregulated rail) without loading VCC |
| LLO early-warning output | Provides 1.02 × VRST trip point to initiate graceful shutdown or data save before system reset |
| Integrated MR pullup | Supports direct connection to mechanical switch or logic gate without external biasing components |
| 28 µA quiescent current | Extends battery life in always-on supervisory applications such as backup controllers and telematics modules |
Applications
| Microprocessor Power Monitoring | Automotive Body Control Module |
|---|---|
Use Scenario: Continuous monitoring of 3.3 V core supply in an ARM-based controller during cold-crank and load-dump transients. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET to halt CPU execution during brownout; LLO triggers NMI for last-chance data logging. Use Value: Prevents corrupted firmware writes and memory corruption by enforcing deterministic reset behavior under dynamic voltage conditions. | Use Scenario: Supervising both regulated 5 V (VCC) and raw 12 V battery feed (via PFI divider) in a door module ECU. IC Role / Device Role / Timing Role: Dual-rail monitor: RESET guards against VCC collapse; PFO signals battery sag before ignition failure. Use Value: Enables predictive diagnostics and failsafe state transitions without adding discrete comparators or ADC channels. |
| Industrial PLC I/O Card | Medical Infusion Pump Controller |
Use Scenario: Ensuring safe startup and shutdown sequencing of isolated CAN and analog front-end supplies. IC Role / Device Role / Timing Role: RESET synchronizes FPGA configuration; MR allows field-service reset via front-panel button. Use Value: Eliminates need for external RC timing networks and improves MTBF through integrated hysteresis and noise immunity. | Use Scenario: Battery-backed real-time clock and motor driver supervision in a Class II medical device. IC Role / Device Role / Timing Role: LLO initiates emergency dose suspension when main supply dips; RESET prevents erratic motor actuation. Use Value: Meets IEC 62304 safety requirements for fail-safe power management with single-chip redundancy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | 3.3 V reset threshold; 35 µA ICC; adjustable timeout via capacitor; no PFI or LLO | Single-rail monitoring only; lacks dual-comparator architecture for secondary supply warning | Choose when only primary VCC supervision is needed and timeout flexibility is prioritized over multi-rail capability |
| MAX6326LT31D2T | 3.08 V reset; 1.6 µA ICC; no PFI/LLO; no MR; SOT-23-5 package | Ultra-low-power but functionally minimal - no manual reset, no auxiliary comparators | Prefer for battery-critical applications where size and quiescent current outweigh feature count |
Compared with TPS3808G33DBVR and MAX6326LT31D2T, LM3704YCMMX-308/NOPB uniquely combines fixed 3.08 V reset, integrated PFI/LLO, MR with pullup, and VSSOP-10 footprint-making it optimal for compact, multi-rail industrial controllers requiring deterministic early-warning signaling without external components.
Availability
LM3704YCMMX-308/NOPB is available at Aetrix Electronics and suitable for embedded controllers, automotive body electronics, and industrial PLCs requiring stable component supply with guaranteed long-term manufacturability and RoHS-compliant packaging.
Supply support for LM3704YCMMX-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 designing analog ICs, embedded processors, and system solutions for industrial, automotive, and communications markets.
The LM3704 belongs to TI's precision voltage supervisor product line, engineered specifically for high-reliability power monitoring in microprocessor-based systems where accurate reset timing, multi-rail awareness, and minimal external components are critical.
FAQ
What is the reset threshold voltage of the LM3704YCMMX-308/NOPB?
The LM3704YCMMX-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 temperature range. This value is fixed and not adjustable; alternative thresholds like 2.32 V require different part numbers (e.g., LM3704YCMM-232/NOPB).
Does the LM3704YCMMX-308/NOPB support manual reset functionality?
Yes, the LM3704YCMMX-308/NOPB includes a dedicated MR (manual reset) input on Pin 2. It features an internal 56 kΩ pullup resistor and triggers reset when pulled below 1.225 V for >25 µs. The MR input is fully debounced and compatible with mechanical switches or logic-level signals without external components.
What is the purpose of the LLO pin on the LM3704YCMMX-308/NOPB?
The LLO (low-line output) pin on the LM3704YCMMX-308/NOPB is an open-drain output that asserts low when VCC falls below 1.02 × VRST (≈3.14 V). It provides early warning of impending power failure-typically used to generate a non-maskable interrupt (NMI) for last-chance data save or controlled shutdown before RESET activates.
How does the PFI input function in the LM3704YCMMX-308/NOPB?
The PFI (power-fail input) on the LM3704YCMMX-308/NOPB compares an external voltage-typically derived from a resistor divider across a secondary supply-to a precise 1.225 V internal reference. When PFI drops below this threshold, the open-drain PFO pin goes low, enabling independent monitoring of upstream rails like battery voltage or unregulated inputs without affecting VCC stability.
What package type and dimensions does the LM3704YCMMX-308/NOPB use?
The LM3704YCMMX-308/NOPB uses a 10-pin VSSOP (DGS) package with nominal body dimensions of 3.00 mm × 3.00 mm and 0.5 mm lead pitch. It is supplied in large tape-and-reel format (3500 units/reel) with RoHS-compliant matte tin (SN) lead finish and JEDEC Level-1 moisture sensitivity rating.
LM3704YCMMX-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:
- Open Drain or Open Collector
- 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
LM3704YCMMX-308/NOPB FAQ
1.How can I place an order for LM3704YCMMX-308/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3704YCMMX-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 LM3704YCMMX-308/NOPB reliable?
The price and inventory of LM3704YCMMX-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 LM3704YCMMX-308/NOPB is usually 5 days.
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5.How can I obtain technical support or documentation for LM3704YCMMX-308/NOPB?
For technical support, including LM3704YCMMX-308/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3704YCMMX-308/NOPB requirements.
6.How does Aetrix verify that LM3704YCMMX-308/NOPB is sourced from the original manufacturer or authorized distributors?
All LM3704YCMMX-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 LM3704YCMMX-308/NOPB meets industry standards.
7.What is the process for return or replacement of LM3704YCMMX-308/NOPB?
All LM3704YCMMX-308/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3704YCMMX-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 LM3704YCMMX-308/NOPB part is unused and in its original packaging.
Return procedure for LM3704YCMMX-308/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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