TPS3700DDCR2 - 18V Window Comparator | Texas Instruments
MPN: TPS3700DDCR2 ✓ ActiveTPS3700DDCR2 Overview
A window voltage detector compares a monitored supply against internally generated upper and lower thresholds. It can operate as a two-channel window comparator or as two independent voltage monitors. This device belongs to the comparator hierarchy, combines a voltage detector function with a precision internal reference, and sits within the broader power management semiconductor and system monitoring categories.
The TPS3700DDCR2 provides two separate open-drain indication outputs, allowing a system to identify both undervoltage and overvoltage conditions. Its 18 V output rating supports monitoring applications above the voltage range commonly handled by basic low-voltage comparator ICs. The internal 400 mV reference provides the basis for externally programmed detection thresholds.
Both comparators include built-in hysteresis according to the manufacturer product information. Hysteresis helps reject brief input disturbances and improves output stability when the monitored voltage is close to a threshold. The device can be configured through external components for different supply ranges, reducing the need for a separate precision reference when the application requires upper and lower fault detection.
Typical uses include industrial equipment monitoring, battery-powered systems, communication equipment, consumer electronics, and power rails where the system must disable downstream circuitry during an invalid voltage condition. The two independent outputs can also support separate fault-reporting paths in redundant or multi-rail architectures.
When designing the circuit, calculate the resistor-defined upper and lower thresholds against the monitored input range, and verify that every pulled-up open-drain output remains below its 18 V rating. The SOT-23-THIN package also requires careful PCB layout and thermal review when the surrounding circuitry or board raises the device temperature.
This product page combines verified manufacturer and distributor information with pin-compatible alternatives, parameter comparisons, application guidance, and practical design notes so engineers can evaluate the TPS3700DDCR2 alongside replacement options without treating merely similar supervisors as exact drop-in parts.
Drop-in alternatives for TPS3700DDCR2 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TPS3700DDCR2 (same form factor and footprint) — differing in Output Type, Package, Output Voltage Rating, Product Type, RoHS Status.
TPS3700DDCR
✅ Drop-InContact for price
View Datasheet →TPS3701DDCR
✅ Drop-InContact for price
View Datasheet →TPS3702CX50DDCT
✅ Drop-In📋 Reference alternative (not in catalog)
TPS3702CX10DDCT
✅ Drop-In📋 Reference alternative (not in catalog)
TPS3700DDCT
✅ Drop-InContact for price
View Datasheet →TPS3700DDCR2 Maximum Ratings & Electrical Characteristics
| Product Type | 18 V window voltage detector |
| Operating Supply Range | 1.8 V to 18 V |
| Number of Comparators | 2 |
| Internal Reference Voltage | 400 mV |
| Output Type | Open-drain |
| Output Voltage Rating | 18 V |
| Monitoring Functions | Overvoltage and undervoltage detection |
| Operating Modes | Window comparator or two independent voltage monitors |
| Threshold Configuration | Externally programmable |
| Hysteresis | Built into both comparators |
| Package | 6-pin SOT-23-THIN |
| Mounting Type | Surface mount |
| Junction Temperature Range | -40°C to 125°C |
TPS3700DDCR2 6-pin sot-23-thin Pin Configuration Guide
Pin configuration for TPS3700DDCR2 (6-pin sot-23-thin package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for TPS3700DDCR2.
Refer to the datasheet for full pin configuration.
Typical Applications
TPS3700DDCR2 is suitable for 6 applications: Industrial 24 V Rail Monitoring, Battery-Powered Equipment Protection, Communications Equipment Supply Fault Detection, Consumer Electronics Overvoltage Protection, Multi-Rail Power-Sequencing Control, Test and Measurement Input Protection.
Industrial 24 V Rail Monitoring
The TPS3700DDCR2 is appropriate for monitoring a nominal 24 V industrial bus after suitable external threshold scaling. Its documented 1.8 V to 18 V monitored range does not directly accept 24 V, so the implementation requires a divider or other scaling network that keeps every input within the device limits. The two open-drain outputs can separately indicate undervoltage and overvoltage, while built-in hysteresis helps suppress short disturbances near either boundary. Engineers must verify divider power ratings, fault thresholds, pull-up voltage, and transient protection rather than connecting 24 V directly.
Recommended
Battery-Powered Equipment Protection
TPS3700DDCR2 can supervise a battery-derived rail when its operating range and threshold configuration suit the cell chemistry and regulator topology. Two independent monitoring outputs allow the controller to distinguish an undervoltage condition from an overvoltage condition, which is useful for protecting storage, radio, or processor loads. The 400 mV internal reference and external resistor network establish the detection boundaries, while comparator hysteresis reduces false fault reports during normal battery transitions. A production design must check whether the battery voltage remains within 1.8 V to 18 V at the monitor input.
Recommended
Communications Equipment Supply Fault Detection
The TPS3700DDCR2 can provide separate fault flags for communication equipment with multiple power domains. Each open-drain output can be pulled up and routed to an FPGA, MCU, reset controller, or system-management logic, allowing undervoltage and overvoltage conditions to be handled independently. The 18 V output rating provides margin for pull-ups on suitable supply rails, and the built-in hysteresis improves stability when a switching regulator causes brief rail movement. System designers should still verify startup timing, fault-response requirements, isolation, and the voltage seen by every monitored input.
Recommended
Consumer Electronics Overvoltage Protection
TPS3700DDCR2 can supervise a regulated consumer-electronics rail and provide fault information before downstream circuitry experiences an invalid voltage. The two comparator outputs are useful when a system must distinguish low-input startup conditions from excessive rail voltage. The internal 400 mV reference supports threshold definition with external resistors, and the compact SOT-23-THIN package preserves board area. For USB, battery, or wall-powered products, engineers must confirm that all monitored rails and pull-ups remain within the documented 1.8 V to 18 V range.
Recommended
Multi-Rail Power-Sequencing Control
TPS3700DDCR2 can support multi-rail supervision by operating as two independent voltage monitors rather than only as a combined window comparator. Each output may be assigned to a different supply domain, allowing supervisory logic to recognize two separate fault conditions. The open-drain architecture permits wired signaling with an external pull-up and suitable logic interface. Sequencing behavior is not automatic, so the application must define how monitor outputs interact with regulators, reset controllers, and load switches to avoid ambiguous or conflicting fault responses.
Recommended
Test and Measurement Input Protection
The TPS3700DDCR2 can be used in test and measurement equipment to flag an input rail that has moved below or above an acceptable operating range. Two open-drain outputs can drive status LEDs, relay logic, or a front-panel controller, while the internal 400 mV reference enables threshold selection with external components. Hysteresis helps avoid flickering indications when the monitored rail contains small switching or measurement disturbances. Instrument designers must account for high-voltage transients, input impedance, leakage into the divider, and whether fault signaling should latch or remain live.
Recommended
Recommended Products Summary
Engineering reference data for TPS3700DDCR2 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS3700DDCR | TPS3701DDCR | TPS3702CX50DDCT | TPS3702CX10DDCT | TPS3700DDCT |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | SOT-23-THIN-6 | SOT-23-THIN-6 - same package | SOT-23-THIN-6 - same package | SOT-23-THIN-6 - same package | SOT-23-THIN-6 - same package | SOT-23-THIN-6 - same package |
Key Differentiators
- Wide monitored voltage range (vs TPS3701DDCR)
- Integrated precision reference (vs TPS3702CX50DDCT)
- Independent fault outputs (vs TPS3700DDCR)
Design Notes
Treat the open-drain outputs as pull-up nodes rather than actively driven logic outputs. Select a pull-up resistor that keeps the high-state current within the device's output limits and keep the pull-up voltage at or below the documented 18 V output rating. Place the pull-up close to the receiving logic when long PCB traces could introduce capacitive noise. Because the supplied evidence does not specify output sink current or input leakage, those values must be confirmed from the official TPS3700 datasheet before finalizing the interface.
Do not assume that the 18 V device rating permits an 18 V monitored bus at the input pin. The verified operating range is 1.8 V to 18 V, and practical designs normally use an external resistor divider to derive the upper and lower thresholds from the 400 mV internal reference. Verify the divider ratios, resistor tolerances, input current, and maximum transient voltage. Using a divider without checking power dissipation or fault behavior can create inaccurate thresholds or excessive divider power.
Keep the divider, reference-related components, and monitored input trace away from switching nodes and high-current return paths. Route the open-drain outputs as short, clearly separated nets and provide adequate ground return for the monitor. The SOT-23-THIN package is compact, so preserve exposed copper around its pads when the board layout and assembly process allow it. Confirm the official land pattern, pin numbering, solder mask, and paste pattern rather than relying only on the generic package name.
Built-in hysteresis helps reject brief glitches, but it does not remove continuous noise or ensure a specific fault-response time. Evaluate the monitored rail's noise amplitude and switching edges against the hysteresis and threshold tolerances shown in the official datasheet. If a fault must be latched, use external logic or a supervisor with the required latch behavior rather than assuming the comparator output itself holds a fault state indefinitely.
Compliance Information
The supplied verified snippets do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Compliance attributes were therefore left unknown rather than inferred from the manufacturer or distributor listings.
