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Texas Instruments TPS3701DDCR
- Part No.:
- TPS3701DDCR
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
TPS3701DDCR.pdf
- Description:
- IC COMPARATOR 1 WINDW SOT23-THIN
- Quantity:
- Payment:
- Shipping:
Inventory:5,805
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Product details
Overview
TPS3701DDCR from Texas Instruments is a high-voltage (1.8 V to 36 V) dual-window voltage detector IC with internal 400-mV reference, two open-drain outputs (OUTA/OUTB), ±0.75% threshold accuracy over temperature, and 5.5-mV typical hysteresis - used for precision overvoltage and undervoltage monitoring in industrial power rails and microcontroller reset supervision.
For engineers reviewing the TPS3701DDCR datasheet, TPS3701DDCR pinout, TPS3701DDCR application, or TPS3701DDCR equivalent, this page delivers verified electrical behavior, SOT-6 package layout, real-world window detection configuration guidance, and validated alternative options for system-level voltage monitoring design.
Technical Context
The TPS3701DDCR integrates two independent precision comparators sharing a trimmed 400-mV internal reference: INA monitors falling thresholds (undervoltage detection), INB monitors rising thresholds (overvoltage detection). Each comparator features built-in hysteresis (5.2–5.5 mV) and operates across full 1.8–36-V supply range.
Outputs OUTA and OUTB are open-drain, rated to 25 V, capable of sinking 10 mA, and support wired-OR logic merging. Input leakage is ≤±25 nA, enabling high-impedance resistor dividers without accuracy degradation - critical for battery-powered and isolated rail monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8 V to 36 V - supports direct connection to 24-V industrial rails, 12-V automotive subsystems, and low-power 1.8-V logic domains without external regulators. |
| Threshold Accuracy | ±0.75% over –40°C to +125°C - ensures reliable trip points across extended temperature environments without calibration. |
| Internal Reference | 400 mV (typical) - enables adjustable window detection down to 400 mV using external resistor dividers; eliminates need for external reference IC. |
| Quiescent Current | 7 µA (typical) - allows continuous monitoring in always-on systems such as IoT edge nodes and safety-critical controllers. |
| Hysteresis | 5.5 mV (typical) - provides noise immunity against transients on monitored rails; prevents false triggering during switching noise or load steps. |
| Output Rating | 25 V open-drain - permits pull-up to higher-voltage rails (e.g., 12 V, 24 V) independent of VDD, simplifying interface to diverse reset/enable inputs. |
| Propagation Delay | 9.9 µs (high-to-low), 28.1 µs (low-to-high) - ensures timely response to fault conditions while maintaining stability under fast-rising/falling input edges. |
Pinout & Package
SOT-6 (DDC) package, 2.90 mm × 1.60 mm body size, surface-mount, thermally enhanced bottom-side pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUTA (Pin 1) | Open-drain output A | Asserted low when INA voltage falls below VIT–(INA) = 397–403 mV; used for undervoltage flag or MCU reset assertion. |
| GND (Pin 2) | Ground reference | Primary return path for internal circuitry and comparator reference; must be low-impedance connection to system ground plane. |
| INA (Pin 3) | Comparator A input | Monitors falling voltage threshold; connects to resistor divider network for undervoltage detection; input leakage ≤±25 nA. |
| INB (Pin 4) | Comparator B input | Monitors rising voltage threshold; connects to same or separate resistor divider for overvoltage detection; identical leakage spec as INA. |
| VDD (Pin 5) | Power supply input | Accepts 1.8–36 V; requires local 0.1-µF ceramic decoupling capacitor; UVLO activates below 1.3–1.7 V to hold outputs in defined state. |
| OUTB (Pin 6) | Open-drain output B | Asserted low when INB voltage exceeds VIT+(INB) = 397–403 mV; used for overvoltage flag or regulator enable disable. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent comparators | Enables simultaneous overvoltage (INB→OUTB) and undervoltage (INA→OUTA) monitoring on same or separate rails - no shared timing constraints or cross-talk. |
| Adjustable window detection | Configurable via three-resistor divider (R1/R2/R3); supports VMON thresholds from 400 mV up to 25 V with <±2.7% total error including resistor tolerance and hysteresis. |
| High-voltage open-drain outputs | OUTA/OUTB tolerate 25-V pull-up - allows direct interface to 3.3-V, 5-V, 12-V, or 24-V logic families without level shifters or additional drivers. |
| Low-input-bias-current inputs | ≤±25 nA leakage at INA/INB - supports >1-MΩ resistor dividers, minimizing standby current while preserving threshold accuracy in battery-backed systems. |
| Startup delay control | 155 µs (typical) startup time after VDD exceeds UVLO - ensures stable internal reference and comparator operation before output assertion. |
Applications
| Industrial Power Monitoring | Microcontroller Reset Supervision |
|---|---|
|
Use Scenario: Continuous monitoring of 24-V PLC I/O power rail for overvoltage (>26.4 V) and undervoltage (<21.6 V) events. IC Role / Device Role / Timing Role: Window voltage detector asserting OUTA/OUTB to trigger shutdown sequence or alert controller via GPIO interrupt. Use Value: Prevents field failures caused by brownout-induced firmware corruption or overvoltage damage to downstream analog front-ends. |
Use Scenario: Supervising 3.3-V core supply of ARM Cortex-M4 microcontroller in embedded gateway device. IC Role / Device Role / Timing Role: Dual-threshold monitor generating clean reset pulse via wired-OR of OUTA/OUTB to MCU's active-low RESET pin. Use Value: Guarantees valid reset assertion for ≥100 ms during power ramp-up and prevents spurious resets during transient dips. |
| FPGA Power Sequencing | Battery-Powered Equipment |
|
Use Scenario: Validating 1.2-V VCCINT and 1.8-V VCCAUX rails prior to FPGA configuration in telecom baseband module. IC Role / Device Role / Timing Role: Independent voltage monitor per rail using separate resistor dividers; OUTA/OUTB feed FPGA's INIT_B and CCLK enable logic. Use Value: Enforces strict power sequencing compliance required for Xilinx 7-series FPGA configuration integrity. |
Use Scenario: Monitoring Li-ion battery pack voltage (2.5–4.2 V) in portable medical sensor to detect end-of-charge and deep-discharge conditions. IC Role / Device Role / Timing Role: Low-quiescent-current window detector (7 µA) enabling multi-year battery life; hysteresis prevents oscillation near cutoff thresholds. Use Value: Extends usable runtime by 8–12% versus discrete comparator solutions due to ultra-low IDD and optimized divider current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV809EADBZR | Single-channel, 3.08-V fixed threshold, SOT-23-3, 1.8–6 V supply, ±1% accuracy, no hysteresis | Only supports single-threshold (reset) supervision; cannot implement window detection without external components | Select when only basic reset generation is needed and board space is constrained; not suitable for dual-threshold or wide-supply applications. |
| MAX6375XR29+T | Single-channel, 2.93-V fixed threshold, SC70-5, 1.8–5.5 V supply, ±0.5% accuracy, 200-ms reset timeout | Includes integrated reset timer but lacks overvoltage capability and 36-V operation; limited to low-voltage digital rails | Prefer for legacy 3.3-V or 5-V systems requiring guaranteed minimum reset pulse width; incompatible with industrial 24-V monitoring. |
Compared with TLV809EADBZR and MAX6375XR29+T, the TPS3701DDCR uniquely delivers dual independent comparators, 36-V operation, and programmable window detection in a single SOT-6 package - eliminating external hysteresis networks and enabling compact, high-reliability power monitoring across wide input ranges.
Availability
TPS3701DDCR is available at Aetrix Electronics and suitable for industrial control systems, embedded computing modules, and FPGA/ASIC power sequencing requiring stable component supply and long-term production continuity.
Supply support for TPS3701DDCR 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 power management technologies, with over 50 years of innovation in high-reliability industrial and automotive ICs.
The TPS3701DDCR belongs to TI's precision voltage supervisor family, designed specifically for robust overvoltage/undervoltage monitoring in harsh environments where supply rail integrity directly impacts system safety and data integrity.
FAQ
What is the function of the TPS3701DDCR in a power monitoring system?
The TPS3701DDCR functions as a dual-threshold window voltage detector that independently monitors rising (INB) and falling (INA) voltage transitions relative to its internal 400-mV reference. It asserts OUTB low during overvoltage and OUTA low during undervoltage - enabling precise rail validation without external references or hysteresis components. This behavior is confirmed in the TPS3701DDCR datasheet Section 7.1 and Figure 1 truth table.
Can the TPS3701DDCR monitor voltages higher than its VDD supply?
Yes - the TPS3701DDCR supports input voltages up to 6.5 V on INA and INB pins regardless of VDD, and with an external resistor divider, it can monitor voltages up to 25 V (e.g., 24-V rail). The device's input structure is rail-to-rail compatible, and its 25-V-rated open-drain outputs allow pull-up to voltages independent of VDD. This capability is specified in Section 6.3 (Recommended Operating Conditions) and Figure 22 of the TPS3701DDCR datasheet.
What is the maximum sink current supported by TPS3701DDCR outputs?
The TPS3701DDCR outputs (OUTA and OUTB) support a maximum sink current of 10 mA each, with VOL ≤ 250 mV at 5 mA and VDD = 5 V. At 3 mA and VDD = 1.8 V, VOL remains ≤ 250 mV. These values are guaranteed across –40°C to +125°C and are documented in Section 6.5 Electrical Characteristics of the TPS3701DDCR datasheet.
How does hysteresis work in the TPS3701DDCR, and what is its value?
The TPS3701DDCR incorporates internal hysteresis of 5.2–12 mV (typical 5.5 mV for INB, 5.5 mV for INA), implemented per comparator to prevent chatter during slow or noisy input transitions. Hysteresis is defined as the difference between positive and negative thresholds (e.g., VIT+(INA) – VIT–(INA)). This design eliminates need for external hysteresis resistors and ensures stable output states - confirmed in Section 6.5 and Figure 1 of the TPS3701DDCR datasheet.
Is the TPS3701DDCR suitable for automotive applications?
The TPS3701DDCR is qualified for operation from –40°C to +125°C junction temperature and supports supply voltages up to 36 V, meeting key requirements for under-hood and infotainment power monitoring. However, it is not AEC-Q100 qualified; for automotive-grade deployment, TI recommends the pin-compatible AEC-Q100 qualified variant TPS3701QDDCRQ1. This distinction is explicitly stated in TI's product folder and packaging addendum for TPS3701DDCR.
TPS3701DDCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Window
- Number of Elements:
- 1
- Output Type:
- Open-Drain
- Voltage - Supply, Single/Dual (±):
- 1.8V ~ 36V
- :
- -
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 11µA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- 28.1µs
- Propagation Delay (Max):
- 5.5mV
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-THIN
TPS3701DDCR FAQ
1.How can I place an order for TPS3701DDCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3701DDCR 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 TPS3701DDCR reliable?
The price and inventory of TPS3701DDCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3701DDCR is usually 5 days.
3.What payment methods are accepted for TPS3701DDCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3701DDCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3701DDCR?
TPS3701DDCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3701DDCR 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 TPS3701DDCR?
For technical support, including TPS3701DDCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3701DDCR requirements.
6.How does Aetrix verify that TPS3701DDCR is sourced from the original manufacturer or authorized distributors?
All TPS3701DDCR 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 TPS3701DDCR meets industry standards.
7.What is the process for return or replacement of TPS3701DDCR?
All TPS3701DDCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS3701DDCR, 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 TPS3701DDCR part is unused and in its original packaging.
Return procedure for TPS3701DDCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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