TPS3307-33DG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The TPS3307-33DG4 is a triple-channel voltage supervisor and reset IC from Texas Instruments that monitors 3 independent supply rails with a fixed 4.55 V reset threshold on one channel and adjustable thresholds on the others. It integrates a power-on reset generator and a manual reset input in an 8-pin SOIC package, issuing a reset pulse when any monitored voltage falls below its threshold. The device is ideal for multi-supply microprocessor systems, embedded controllers, and communication boards requiring reliable multi-rail power sequencing and fault protection.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- TPS3307-33DG4 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.9029(MOQ 75)
- 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 TPS3307-33DG4?
- 3-channel simultaneous voltage supervision for multi-rail power monitoring
- Fixed 4.55 V reset threshold plus adjustable threshold inputs for design flexibility
- Integrated power-on reset (POR) generator for automatic startup sequencing
- Manual reset input for push-button or external logic controlled resets
- 8-pin SOIC package (SOP8) for compact, low-cost PCB implementation
- RoHS-compliant halogen-free plastic/epoxy construction (JESD-609 e4)
What is TPS3307-33DG4 used for?
The TPS3307-33DG4 is used in multi-processor embedded systems and communication controllers where 3 separate supply rails such as 3.3 V, 2.5 V, and 1.8 V must all be valid before releasing processor resets. Its adjustable threshold inputs allow monitoring custom non-standard voltages in FPGA boards, networking switches, and industrial PLCs. The manual reset pin also enables front-panel reset buttons or watchdog circuit integration in server blades and ruggedized embedded computing modules.
What are the specifications of TPS3307-33DG4?
| YTEOL | 0 |
| Additional Feature | RESET THRESHOLD VOLTAGE IS 4.55V; MANUAL RESET INPUT; POWER-ON RESET GENERATOR |
| Adjustable Threshold | YES |
| Analog IC - Other Type | VOLTAGE SUPERVISOR/RESET IC |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e4 |
| Number of Channels | 3 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 0.04mA |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 2V |
| 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 | 1.27mm |
| Terminal Position | DUAL |
| Threshold Voltage-Nom | +1.25,2.93,4.55V |
| 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 |
| Country of Origin | Taiwan |
Where can I find the TPS3307-33DG4 datasheet?
TPS3307-33DG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for TPS3307-33DG4?
Compatible alternatives and drop-in replacements for TPS3307-33DG4:
Voltage Supervisor/Reset IC, Adjustable, 3 Channel, +1.25,2.93,4.55V, CMOS, PDSO8
Voltage Supervisor/Reset IC, Adjustable, 3 Channel, +1.25,2.93,4.55V, CMOS, PDSO8
Voltage Supervisor/Reset IC, Adjustable, 3 Channel, +1.25,2.25,2.93V, CMOS, PDSO8
Voltage Supervisor/Reset IC, Adjustable, 3 Channel, +1.25,1.68,2.93V, CMOS, PDSO8
Voltage Supervisor/Reset IC, Adjustable, 3 Channel, +1.25,2.25,2.93V, CMOS, PDSO8
Frequently Asked Questions
How does the TPS3307-33DG4 protect multi-supply systems when one of the 3 monitored rails collapses?
When any of the 3 monitored supply rails drops below its preset threshold — including the fixed 4.55 V channel — the TPS3307-33DG4 immediately asserts a reset output that holds the downstream processors in reset until all three supplies recover and remain stable. This prevents processors from executing with under-voltage conditions that can corrupt program memory or cause undefined behaviour in 3.3 V and lower-voltage system domains.
Can the adjustable threshold inputs monitor voltages other than 3.3 V on the TPS3307-33DG4?
Yes, the TPS3307-33DG4 provides adjustable threshold inputs that accept external resistor dividers, allowing designers to set custom trip points for monitoring voltages such as 1.8 V, 2.5 V, or 5 V rails commonly found in mixed-voltage SoC boards. This flexibility makes it straightforward to protect any combination of core and I/O supply domains without requiring a separate supervisor IC per voltage level.
What role does the power-on reset generator play in embedded system startup sequences?
The integrated power-on reset generator in the TPS3307-33DG4 automatically holds all supervised processors in reset for a defined timeout period after all 3 monitored supplies cross their thresholds, ensuring power rails are fully settled before code execution begins. Without this POR delay, DRAM initialization and flash boot sequences can fail unpredictably when supply voltages ramp slowly at startup, particularly in systems powered from large bulk capacitors.
How does the manual reset input enhance system serviceability in industrial equipment?
The manual reset input on the TPS3307-33DG4 allows a front-panel button press or an external watchdog timer output to force an immediate system reset independent of supply voltage levels. This is useful during field servicing of industrial PLCs and embedded controllers, where technicians need a reliable software-independent reset mechanism without removing power from the entire 3-rail system.
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Why Buy from FindMyChip
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.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 75+ | $3.3300 | $249.75 |
| 150+ | $2.9029 | $435.43 |
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