LM3704XDMMX-232/NOPB Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments LM3704XDMMX-232/NOPB is a dual-channel voltage supervisor and microprocessor reset IC with an integrated watchdog timer and manual reset input. It monitors two supply rails and asserts RESET for a programmable delay when either drops below threshold. Housed in a 10-pin MSOP package for compact system-reliability circuits.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 10
- Lifecycle
- OBSOLETE
- Datasheet
- LM3704XDMMX-232/NOPB Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM3704XDMMX-232/NOPB?
- Dual-channel voltage supervision monitors 2 independent supply rails simultaneously with fixed or adjustable thresholds
- Integrated watchdog timer asserts RESET if the processor fails to toggle the WDI pin within the timeout window
- Manual reset input (MR) allows external pushbutton or GPIO-driven system reset without additional logic
- Power-fail input (PFI) monitors a third supply or early-warning signal before the main reset assertion
What is LM3704XDMMX-232/NOPB used for?
LM3704XDMMX-232/NOPB is designed to ensure reliable power-on and fault-recovery behavior in microprocessor-based systems such as industrial PLCs, network routers, and embedded controllers. Its dual-rail monitoring and watchdog timer protect against both supply undervoltage and software lockup conditions simultaneously in a single 10-pin MSOP device. The device suits safety-critical applications like medical monitoring equipment and automotive control modules where unattended recovery from hangs is mandatory.
What are the specifications of LM3704XDMMX-232/NOPB?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Additional Feature | BAT BUP SW:N;MNL RST:Y;OV DET:N;PW FL IP:Y;PW FL IO:N;PW FL OP:N;PRG RST DLY:N;UV DET:N;WD:Y;WWD:N |
| Adjustable Threshold | NO |
| Analog IC - Other Type | VOLTAGE SUPERVISOR/RESET IC |
| JESD-30 Code | S-PDSO-G10 |
| JESD-609 Code | e3 |
| Number of Channels | 2 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP10,.19,20 |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 1V |
| Supply Voltage-Nom (Vsup) | 1.2V |
| Surface Mount | YES |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | TIN |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.5mm |
| Terminal Position | DUAL |
| Threshold Voltage-Nom | +2.32V |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the LM3704XDMMX-232/NOPB datasheet?
LM3704XDMMX-232/NOPB Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM3704XDMMX-232/NOPB?
Compatible alternatives and drop-in replacements for LM3704XDMMX-232/NOPB:
Voltage Supervisor/Reset IC, Fixed, 2 Channel, +3.08V, CMOS, PDSO10
Frequently Asked Questions
How many supply rails can the LM3704XDMMX-232/NOPB monitor simultaneously, and what happens when one drops below threshold?
The LM3704XDMMX-232/NOPB monitors 2 independent supply voltage rails through dedicated sense inputs. When either rail falls below its threshold, the device asserts an active-low RESET output after a factory-trimmed delay (232 ms for the X-232 variant), holding the microprocessor in reset until the supply recovers and stays above threshold for the full delay period.
What watchdog timer behavior does the LM3704XDMMX-232/NOPB implement, and what timeout period applies?
The integrated watchdog requires the monitored processor to toggle the WDI input within a set timeout window. If WDI is not toggled, the device asserts RESET for the programmed 232 ms delay, forcing a system restart. This prevents undetected software lockups in unattended industrial equipment running continuously for months without human intervention, covering 2 monitored supply channels at once.
How does the power-fail input on the LM3704XDMMX-232/NOPB benefit designs with hold-up capacitors or UPS backup?
The power-fail input (PFI) detects AC mains dropout or battery backup switchover before the main supply rail droops. Firmware can use the early-warning PFI interrupt to flush data to non-volatile memory within 10 ms to 20 ms before the 232 ms reset delay expires. This protects configuration data in industrial meters and routers without requiring a dedicated power-fail supervisor chip.
In a compact embedded design, how does the 10-pin MSOP package of the LM3704XDMMX-232/NOPB compare to using two discrete supervisors?
The LM3704XDMMX-232/NOPB integrates dual-rail supervision, watchdog, and manual reset in a 10-pin MSOP package measuring 3 mm x 3 mm. Replacing it with two single-channel supervisors plus a separate watchdog IC would require 3 devices in 6 to 8 pins each, consuming roughly 3 times the PCB area and adding 2 additional supply bypass capacitors.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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