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Texas Instruments TPS3805H33MDCKREP
- Part No.:
- TPS3805H33MDCKREP
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TPS3805H33MDCKREP.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,453
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Product details
Overview
TPS3805H33MDCKREP from Texas Instruments is a dual-voltage supervisor IC with fixed 3.05 V VDD threshold and adjustable 1.226 V SENSE input, ±1.5% threshold accuracy, 3 µA supply current at 3.3 V, push/pull RESET output, and operation from −55°C to +125°C - used for power-on reset supervision in DSP/microcontroller systems requiring high-reliability voltage monitoring.
For engineers reviewing the TPS3805H33MDCKREP datasheet, TPS3805H33MDCKREP pinout, TPS3805H33MDCKREP application, or TPS3805H33MDCKREP equivalent, key selection considerations include its dual-threshold architecture, extended temperature range, SC-70 package footprint, low quiescent current, and push/pull output drive capability in harsh-environment embedded control designs.
Technical Context
The TPS3805H33MDCKREP integrates two independent voltage comparators: one monitors VDD against a precision 3.05 V threshold (±1.5%), while the second monitors an external SENSE node against a 1.226 V reference. RESET asserts low if either voltage falls below its respective threshold, with 30 mV hysteresis on the VDD path.
It features a push/pull RESET output capable of sourcing/sinking up to 5 mA, operates from 1.3 V to 6 V supply, draws only 3 µA typical current at 3.3 V, and includes internal reference stability optimized for −55°C to +125°C operation with JEDEC-qualified reliability testing including HAST and temperature cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Threshold | 3.05 V ±1.5% - precise detection of 3.3 V rail collapse with minimal false resets |
| SENSE Threshold | 1.226 V ±1.5% - enables accurate monitoring of auxiliary rails (e.g., 1.2 V, 1.5 V, 1.8 V) via external resistor divider |
| Supply Current | 3 µA typical at VDD = 3.3 V - supports ultra-low-power battery-backed systems and always-on supervision |
| Output Type | Push/pull active-low RESET - eliminates need for external pull-up resistor and ensures fast, robust reset signaling |
| Operating Temp | −55°C to +125°C - qualified per JEDEC standards for aerospace, industrial, and automotive under-hood applications |
| Hysteresis | 30 mV on VDD path - prevents oscillation during slow-rising or noisy supply transitions |
| Reset Delay | 5–100 µs propagation time - ensures deterministic timing between voltage breach and RESET assertion |
Pinout & Package
TPS3805H33MDCKREP uses a 5-pin SC-70 (DCK) package - 2.0 mm × 1.25 mm footprint, 1.1 mm max height, JEDEC MO-203 compliant, suitable for space-constrained PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - NC | No internal connection | Unused pad; must be left floating or grounded per layout best practice - no electrical function |
| 2 - GND | Ground reference | Primary return path for internal comparators and output stage; requires low-impedance connection to system ground plane |
| 3 - RESET | Active-low push/pull output | Drives low when VDD or SENSE < threshold; actively drives high when valid - no external pull-up needed |
| 4 - VDD | Supply and primary sense input | Powers device and provides fixed 3.05 V threshold monitoring; minimum operating voltage is 1.3 V |
| 5 - SENSE | Adjustable secondary sense input | Monitors external voltage divider output; reference is 1.226 V - enables flexible multi-rail supervision |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent thresholds | Simultaneous monitoring of main 3.3 V rail (VDD) and auxiliary rail (SENSE) prevents single-point failure in critical systems |
| ±1.5% threshold accuracy | Minimizes design margin overhead - enables tighter supply tolerance budgets without compromising reset reliability |
| 3 µA supply current | Reduces standby power in battery-powered equipment; extends runtime in always-on supervisory circuits |
| Push/pull RESET output | Eliminates external pull-up resistor, reduces BOM count, improves noise immunity, and accelerates RESET deassertion |
| −55°C to +125°C qualification | Validated via HAST, temperature cycling, and electromigration testing - meets requirements for extended-life industrial deployments |
Applications
| Industrial Motor Control | Avionics Power Management |
|---|---|
|
Use Scenario: Supervises 3.3 V FPGA configuration rail and 1.2 V core rail in servo drive controllers exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Dual-threshold supervisor asserting hardware reset before logic corruption occurs during brownout or cold-start conditions. Use Value: Prevents erratic motor behavior by guaranteeing clean reset sequencing across both rails with guaranteed −55°C startup capability. |
Use Scenario: Monitors avionics-grade 3.3 V data bus supply and 1.5 V ADC reference rail in flight control interface modules. IC Role / Device Role / Timing Role: Provides fail-safe reset initiation when either rail deviates beyond ±3% tolerance, meeting DO-254 functional safety constraints. Use Value: Enables deterministic system recovery after transient voltage sags without software intervention or watchdog dependency. |
| Ruggedized IoT Gateway | Automotive ADAS Camera Module |
|
Use Scenario: Ensures reliable boot of ARM Cortex-M7 processor and LPDDR4 memory subsystem in outdoor edge gateway enclosures. IC Role / Device Role / Timing Role: Dual-input supervisor validating both main SoC supply and PMIC-controlled I/O rail prior to firmware execution. Use Value: Eliminates boot failures caused by marginal 3.3 V rail rise time or SENSE node noise through hysteresis and low-current design. |
Use Scenario: Supervises 3.3 V image sensor interface and 1.2 V ISP core supply in rear-view camera ECU operating under engine bay thermal stress. IC Role / Device Role / Timing Role: Hardware-level reset generator with extended temperature rating, interfacing directly with TI TDA3x SoC reset input. Use Value: Maintains functional safety integrity (ASIL-B compatible) by ensuring reset assertion within 100 µs of rail fault detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3805H33QDCKREP | Same electrical specs but rated for −40°C to +125°C; M-suffix version has extended low-temp qualification | Not qualified for −55°C operation; unsuitable for cryogenic or high-reliability aerospace deployments | Select Q-suffix only for commercial/industrial applications where −40°C lower limit is sufficient |
| MAX6326UT33D3+T | Single 3.3 V supervisor (no SENSE input); 2.5 µA supply current; open-drain output; ±2.5% threshold accuracy | Lacks dual-threshold capability - cannot monitor auxiliary rails; requires external pull-up; lower accuracy increases design margin | Use only when supervising one rail and cost sensitivity outweighs need for auxiliary monitoring or extended temp range |
Compared with TPS3805H33QDCKREP, the TPS3805H33MDCKREP adds −55°C startup assurance and enhanced DMS support; versus MAX6326UT33D3+T, it delivers dual-rail supervision, tighter accuracy, and push/pull drive - making it superior for safety-critical, multi-supply systems.
Availability
TPS3805H33MDCKREP is available at Aetrix Electronics and suitable for industrial motor control, avionics power management, and ruggedized IoT gateway designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS3805H33MDCKREP 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 leader specializing in analog, embedded processing, and high-reliability components, with over 90 years of innovation in power management and signal chain solutions.
The TPS3805H33MDCKREP belongs to TI's Enhanced Plastic (EP) supervisory circuit family, engineered specifically for mission-critical applications demanding extended temperature operation, controlled baseline manufacturing, and long-term supply chain stability.
FAQ
What is the exact VDD threshold voltage of the TPS3805H33MDCKREP?
The TPS3805H33MDCKREP has a nominal VDD threshold voltage of 3.05 V with ±1.5% accuracy over −55°C to +125°C. This value is factory-trimmed and specified in the Electrical Characteristics table of the official datasheet (SGLS227C). The TPS3805H33MDCKREP uses this fixed threshold to supervise 3.3 V supply rails without external components.
Does the TPS3805H33MDCKREP support monitoring of a second voltage rail?
Yes, the TPS3805H33MDCKREP supports dual-rail supervision: its VDD pin monitors the 3.3 V supply at 3.05 V threshold, while its SENSE pin monitors an external voltage (e.g., 1.2 V, 1.5 V, or 1.8 V) using a precision 1.226 V internal reference. The TPS3805H33MDCKREP asserts RESET if either rail drops below its respective threshold.
What is the output configuration of the TPS3805H33MDCKREP RESET pin?
The TPS3805H33MDCKREP features a push/pull (active-drive) RESET output - unlike open-drain variants such as the TPS3803 series. This means the TPS3805H33MDCKREP actively drives both high and low states, eliminating the need for an external pull-up resistor and enabling faster, more robust reset signaling in noise-prone environments.
Is the TPS3805H33MDCKREP qualified for extended temperature operation?
Yes, the TPS3805H33MDCKREP is fully qualified for operation from −55°C to +125°C. It undergoes JEDEC-standard reliability testing including HAST, temperature cycling, and electromigration. This M-suffix EP device is designed for aerospace, defense, and industrial applications where extreme thermal resilience is mandatory - a key differentiator from Q-suffix versions.
What package type and dimensions does the TPS3805H33MDCKREP use?
The TPS3805H33MDCKREP uses a 5-pin SC-70 (DCK) package measuring 2.0 mm × 1.25 mm with a maximum height of 1.1 mm. Its pinout is standardized: Pin 1 (NC), Pin 2 (GND), Pin 3 (RESET), Pin 4 (VDD), Pin 5 (SENSE). The TPS3805H33MDCKREP's compact footprint supports high-density PCB layouts and automated placement.
TPS3805H33MDCKREP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 3.05V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 5µs Typical Propagation Delay
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
TPS3805H33MDCKREP FAQ
1.How can I place an order for TPS3805H33MDCKREP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3805H33MDCKREP 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 TPS3805H33MDCKREP reliable?
The price and inventory of TPS3805H33MDCKREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3805H33MDCKREP is usually 5 days.
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TPS3805H33MDCKREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3805H33MDCKREP order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS3805H33MDCKREP?
For technical support, including TPS3805H33MDCKREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3805H33MDCKREP requirements.
6.How does Aetrix verify that TPS3805H33MDCKREP is sourced from the original manufacturer or authorized distributors?
All TPS3805H33MDCKREP 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 TPS3805H33MDCKREP meets industry standards.
7.What is the process for return or replacement of TPS3805H33MDCKREP?
All TPS3805H33MDCKREP units undergo pre-shipment inspection (PSI). If there is an issue with TPS3805H33MDCKREP, 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 TPS3805H33MDCKREP part is unused and in its original packaging.
Return procedure for TPS3805H33MDCKREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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