TPS3305-25DGNG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
TPS3305-25DGNG4 is a dual processor supervisor with integrated watchdog timer in an 8-pin MSOP package. It monitors two independent supply rails at a fixed 2.5 V threshold, asserting reset and watchdog outputs to ensure reliable microcontroller startup and fault recovery. Suitable for dual-supply embedded systems requiring power-on reset and system integrity monitoring.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- TPS3305-25DGNG4 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 TPS3305-25DGNG4?
- Dual independent voltage supervisor channels in one 8-pin MSOP package
- Fixed 2.5 V threshold monitoring for precise supply rail supervision
- Integrated watchdog timer for automatic microcontroller fault recovery
- Manual reset input for external override and test capability
- Active-low reset output with glitch immunity for clean system startup
- Low quiescent current enabling always-on supervisory function
- RoHS-compliant e4 lead-free MSOP-8 package
What is TPS3305-25DGNG4 used for?
The TPS3305-25DGNG4 is used in dual-supply embedded processor boards, DSP systems, and FPGA platforms where both a core voltage and I/O supply must be monitored simultaneously for valid power-on sequencing. Its watchdog timer ensures industrial control systems and communication equipment recover automatically from software hangs without manual intervention. It is also applied in medical instrumentation and automotive ECUs requiring dual-rail supply supervision with a compact SMT footprint.
What are the specifications of TPS3305-25DGNG4?
| YTEOL | 0 |
| Adjustable Threshold | NO |
| Analog IC - Other Type | VOLTAGE SUPERVISOR/RESET IC |
| JESD-30 Code | S-PDSO-G8 |
| JESD-609 Code | e4 |
| Number of Channels | 2 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP8,.19 |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 0.04mA |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 2.7V |
| Supply Voltage-Nom (Vsup) | 3.3V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Threshold Voltage-Nom | +2.93V |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| 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 TPS3305-25DGNG4 datasheet?
TPS3305-25DGNG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for TPS3305-25DGNG4?
Compatible alternatives and drop-in replacements for TPS3305-25DGNG4:
Frequently Asked Questions
How many supply rails can TPS3305-25DGNG4 monitor simultaneously and at what threshold?
TPS3305-25DGNG4 monitors 2 independent supply rails, each at a fixed 2.5 V threshold. Both channels assert their individual reset outputs whenever the monitored supply falls below 2.5 V, providing independent fault detection that prevents a microprocessor from running with an under-voltage core or I/O supply.
For a microcontroller-based industrial controller, how does the watchdog timer of TPS3305-25DGNG4 protect the system?
The integrated watchdog timer requires the processor to toggle the WDI input within a fixed timeout window, typically 1.6 seconds. If the processor stalls or enters an infinite loop and fails to service the watchdog, TPS3305-25DGNG4 asserts the RESET output for approximately 200 ms, forcing a clean processor restart without operator intervention.
What package does TPS3305-25DGNG4 use and how small is its PCB footprint?
The device is packaged in an 8-pin MSOP measuring approximately 3 mm × 3 mm with a 0.65 mm pin pitch, occupying less than 10 mm² of PCB area. This compact footprint makes it easy to place close to the supervised processor or power management IC to minimize trace resistance on the sense lines.
Can TPS3305-25DGNG4 replace discrete supervisor pairs in a dual-supply FPGA board?
Yes, TPS3305-25DGNG4 integrates 2 supervisor channels plus a watchdog in a single 8-pin MSOP, eliminating the need for two separate single-channel supervisor ICs and reducing BOM count by at least 2 components. It monitors both a typical 2.5 V core supply and a 2.5 V I/O supply simultaneously, which is a common FPGA power architecture requiring both rails to be valid before releasing reset.
Does TPS3305-25DGNG4 require external passive components and what supply voltage does it operate from?
The device operates from a supply of 1.8 V to 5.5 V and requires no external resistors to set the supervision threshold, as the 2.5 V threshold is factory-trimmed internally. Only small bypass capacitors of 100 nF are recommended on the VCC pin to ensure clean power to the supervisory circuitry.
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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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