TPS3620-50DGKTG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The TPS3620-50DGKTG4 is a single-channel processor supervisor IC with a fixed 4.55 V reset threshold, a manual reset input, and an active-low RESET output in an 8-pin VSSOP package. It monitors 5 V supply rails and holds the processor in reset during power-up and supply fault conditions. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- TPS3620-50DGKTG4 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 TPS3620-50DGKTG4?
- Fixed 4.55 V undervoltage threshold monitors a 5 V rail with a typical ±2% accuracy, ensuring the processor does not start executing code while the supply is below safe operating limits
- Manual reset input (MR pin) allows an external pushbutton or supervisory signal to assert a clean, debounced reset without additional glue logic or microcontroller intervention
- Compact 8-pin VSSOP package with 0.65 mm pitch occupies less than 5 mm² of board area, making it suitable for space-constrained industrial control cards and embedded computing modules
What is TPS3620-50DGKTG4 used for?
The TPS3620-50DGKTG4 is used in industrial automation controllers, programmable logic controllers, and embedded computing modules to guarantee a valid power-on reset and prevent microprocessor or FPGA false starts when a 5 V rail rises slowly or experiences brownout conditions. Its manual reset pin connects directly to a front-panel reset button or a watchdog output from a supervisor MCU, simplifying the reset logic hierarchy in multi-board systems. Communication infrastructure equipment such as managed switches and routers also uses this device to enforce deterministic processor restart sequences during power cycling.
What are the specifications of TPS3620-50DGKTG4?
| YTEOL | 0 |
| Additional Feature | BAT BUP SW:N;MNL RST:Y;OV DET:N;PW FL IP:N;PW FL IO:N;PW FL OP:N;PRG RST DLY:N;UV DET:N;WD:N;WWD:N |
| Adjustable Threshold | NO |
| Analog IC - Other Type | BATTERY BACKUP SUPERVISOR |
| JESD-30 Code | S-PDSO-G8 |
| JESD-609 Code | e4 |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP8,.19 |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 0.04mA |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 1.65V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| 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 TPS3620-50DGKTG4 datasheet?
TPS3620-50DGKTG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for TPS3620-50DGKTG4?
Compatible alternatives and drop-in replacements for TPS3620-50DGKTG4:
Frequently Asked Questions
At what supply voltage does the TPS3620-50DGKTG4 assert its RESET output, and how accurate is that threshold?
The TPS3620-50DGKTG4 asserts an active-low RESET when the monitored supply falls below 4.55 V, which is the factory-trimmed fixed threshold for the -50 variant in this family. The threshold accuracy is typically ±2%, meaning reset asserts between approximately 4.46 V and 4.64 V across temperature and process variation. This tight window ensures the processor receives a valid reset before the 5 V rail drops low enough to cause erratic code execution, but still allows normal operation at 5 V ± 5% regulated supply tolerances.
How does the manual reset pin on the TPS3620-50DGKTG4 work, and what external circuit is needed to use it?
The MR (manual reset) pin is an active-low input with an internal pull-up resistor, typically 10 kΩ to 50 kΩ to VCC. Connecting a normally-open pushbutton between MR and GND asserts a system reset when pressed, with no external debounce capacitor or resistor required because the supervisor IC internally stretches the reset pulse to a minimum duration of 200 ms (or the programmed delay). This eliminates a comparator, RC network, and logic gate that would otherwise be needed to generate a clean pushbutton reset in a microcontroller system.
Can the TPS3620-50DGKTG4 replace a separate power-on reset RC circuit in a 5 V microprocessor design?
Yes. A discrete RC power-on reset circuit using a 10 kΩ resistor and 1 µF capacitor provides a roughly 10 ms reset delay but is sensitive to slow power ramps and does not guarantee a clean threshold crossing at a specific voltage. The TPS3620-50DGKTG4 provides a guaranteed 4.55 V undervoltage threshold with a fixed reset timeout, removing the RC timing uncertainty, eliminating 2 passive components from the BOM, and guaranteeing reset assertion down to 1.1 V supply voltage — a capability the RC circuit cannot provide during a partial brownout event.
Is the TPS3620-50DGKTG4 suited for automotive applications, and what temperature range does it support?
The TPS3620-50DGKTG4 is a commercial/industrial grade device with an operating temperature range of -40°C to +85°C, which covers most industrial and light-commercial applications. It is not AEC-Q100 automotive-qualified in this specific orderable part number. For automotive designs requiring operation up to +125°C with AEC-Q100 certification, Texas Instruments offers automotive-qualified variants in the TPS3620 family; designers should verify the automotive-specific orderable part number with the distributor before designing the device into an underhood or powertrain application.
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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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