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Texas Instruments TL7712ACDR
- Part No.:
- TL7712ACDR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TL7712ACDR.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,984
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Product details
Overview
TL7712ACDR from Texas Instruments is a precision supply-voltage supervisor IC designed for reset control in 12 V microprocessor and CMOS systems. It features a 10.8 V ±0.2 V threshold voltage (VIT−), 35 mV hysteresis, externally adjustable reset pulse duration via CT capacitor, open-collector RESET/RESET outputs, and operates across 3.5 V to 18 V supply range.
For engineers reviewing the TL7712ACDR datasheet, TL7712ACDR pinout, TL7712ACDR application, or TL7712ACDR equivalent, this device serves as a critical undervoltage detection and power-on reset generator in industrial controllers, embedded instrumentation, and legacy 12 V logic systems requiring stable, temperature-compensated reset timing.
Technical Context
The TL7712ACDR integrates a precision bandgap reference, comparator with hysteresis, delay timer controlled by external CT capacitor, and dual open-collector outputs (active-high RESET and active-low RESET). Its SENSE input monitors system supply voltage directly or via resistor divider, triggering reset when voltage falls below 10.6 V (min) and reasserting only after crossing 10.95 V (typ, VIT+) due to 35 mV hysteresis.
During power-up, RESET remains low until VCC exceeds ~3.6 V, then initiates a programmable delay (e.g., 1.3 ms with 0.1 µF CT) before deassertion - ensuring reliable microprocessor initialization. The REF output provides a stable 2.53 V (typ) reference usable for external circuitry, varying <±16 mV over –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.5 V to 18 V - supports wide-range 12 V systems including noisy industrial rails. |
| Threshold Voltage (VIT−) | 10.6 V (min) to 11.0 V (max) at 25°C - precisely targets 12 V nominal supplies for reliable undervoltage detection. |
| Hysteresis | 35 mV - prevents chatter during slow-rising/falling supply transitions near threshold. |
| Reference Output (REF) | 2.48–2.58 V - stable, temperature-compensated voltage source usable for external biasing or calibration. |
| Reset Pulse Duration | 0.65–2.6 ms (with 0.1 µF CT) - programmable delay ensures sufficient processor boot time before release. |
| Output Type | Dual open-collector (RESET, RESET) - enables flexible pull-up configuration and wired-OR reset bus interfacing. |
| Operating Temperature | 0°C to +70°C - commercial-grade rating suitable for office, consumer, and non-extreme industrial environments. |
Pinout & Package
TL7712ACDR is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.91 mm, with standard JEDEC MS-012AC footprint and RoHS-compliant NiPdAu lead finish. It is rated MSL Level-1 (unlimited floor life at ≤30°C/60% RH).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REF (Pin 1) | Voltage reference output | Provides 2.53 V (typ) stable reference; requires 0.1 µF bypass capacitor to GND for noise immunity. |
| RESIN (Pin 2) | Manual reset input | Active-low asynchronous reset trigger; pulls RESET/RESET active when driven low (≤0.6 V). |
| CT (Pin 3) | Timing capacitor connection | Sets reset pulse duration (td ≈ 1.3×10⁴ × CT); 0.1 µF yields ~1.3 ms delay. |
| GND (Pin 4) | Ground reference | Common return for all internal circuits and external bypass capacitors (REF, CT, VCC). |
| RESET (Pin 5) | Inverted reset output | Active-low open-collector output; sinks current when asserted (e.g., drives microcontroller /RESET). |
| RESET (Pin 6) | Non-inverted reset output | Active-high open-collector output; requires external pull-up for logic-high signaling. |
| SENSE (Pin 7) | Supply monitoring input | Monitors system voltage directly or via resistor divider; triggers reset when VSENSE < VIT−. |
| VCC (Pin 8) | Power supply input | Primary supply rail (3.5–18 V); powers internal circuitry and enables operation above 3.6 V. |
Key Features
| Feature | Design Value |
|---|---|
| Externally adjustable reset delay | Capacitor-programmable timing (0.1 µF → 1.3 ms) enables precise match to processor boot requirements. |
| Precision voltage sensing | 10.8 V ±0.2 V threshold with 35 mV hysteresis ensures robust detection of 12 V rail collapse without false triggers. |
| Temperature-compensated reference | REF output drifts <±16 mV from –40°C to +85°C - supports accurate external analog functions across environment. |
| Wide operating supply range | 3.5 V to 18 V operation accommodates brown-out tolerance and legacy 12 V designs with marginal regulation. |
| Dual complementary reset outputs | Open-collector RESET (active-low) and RESET (active-high) simplify interface to diverse MCU reset architectures. |
Applications
| Industrial PLC Power Monitoring | Legacy 12 V Embedded Controller Reset |
|---|---|
|
Use Scenario: Monitoring 12 V DC power rail in programmable logic controller backplane where voltage sag indicates upstream AC/DC converter failure. IC Role / Device Role / Timing Role: TL7712ACDR acts as primary undervoltage detector and reset initiator, asserting RESET for 1.3 ms upon drop below 10.6 V to force safe state recovery. Use Value: Prevents erratic PLC operation during marginal 12 V conditions by guaranteeing full reset before resuming scan cycle execution. |
Use Scenario: Providing power-on reset for an older 12 V microcontroller-based data acquisition module with no internal POR circuitry. IC Role / Device Role / Timing Role: TL7712ACDR generates a clean, delayed reset pulse synchronized to 12 V rail stabilization, using its REF pin to bias external ADC reference. Use Value: Eliminates boot failures caused by premature clock enable or memory access before supply reaches valid operating range. |
| Automotive Body Control Module (BCM) Subsystem | Test Equipment Power Sequencing |
|
Use Scenario: Supervising auxiliary 12 V supply in non-safety-critical BCM subsystems (e.g., window lift control) where ISO 16750-2 transient immunity is required. IC Role / Device Role / Timing Role: TL7712ACDR monitors raw battery-derived 12 V rail, leveraging its 35 mV hysteresis to ignore load-dump-induced dips while detecting sustained under-voltage events. Use Value: Enables graceful shutdown and fault logging instead of uncontrolled latch-up during vehicle cranking or alternator dropout. |
Use Scenario: Coordinating power-up sequence of multi-rail test fixture (±12 V, +5 V) where 12 V must stabilize before enabling downstream logic. IC Role / Device Role / Timing Role: TL7712ACDR's SENSE pin monitors +12 V rail; its RESET output gates enable signal to secondary regulators only after valid 12 V is confirmed and delay expires. Use Value: Prevents race conditions and inrush current conflicts by enforcing strict inter-rail power sequencing without FPGA or microcontroller overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supply-voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G12DBVR | Fixed 12 V threshold, internal timer (200 ms default), push-pull outputs, lower quiescent current (1.8 µA vs 1.8 mA). | Designed for low-power battery-backed systems; lacks REF output and external timing flexibility. | Choose for ultra-low-power 12 V monitoring where fixed delay suffices and REF is unnecessary. |
| MAX6805US29D3+T | 2.93 V threshold, SOT-23-3 package, no REF output, 140 ms min reset pulse, higher accuracy (±1.5% vs ±2%). | Targeted at 3.3 V/5 V logic; incompatible voltage range - not a functional substitute for 12 V supervision. | Not suitable for TL7712ACDR's 12 V use case; consider only if redesigning for lower supply rails. |
Compared with TPS3808G12DBVR and MAX6805US29D3+T, the TL7712ACDR uniquely combines 12 V precision threshold, external timing control, and a buffered reference output - making it irreplaceable in legacy 12 V systems requiring design flexibility and analog support.
Availability
TL7712ACDR is available at Aetrix Electronics and suitable for industrial automation, embedded instrumentation, and test equipment requiring stable component supply with long-term manufacturability and consistent electrical performance.
Supply support for TL7712ACDR 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 decades of experience in high-reliability industrial and automotive ICs.
The TL77xxA family was engineered specifically as cost-effective, robust reset supervisors for microcomputer systems - emphasizing precision threshold stability, wide supply tolerance, and field-proven reliability in 12 V and other legacy logic environments.
FAQ
What is the exact threshold voltage specification for TL7712ACDR?
The TL7712ACDR has a guaranteed negative-going input threshold voltage (VIT−) of 10.6 V (minimum) to 11.0 V (maximum) at 25°C, with typical value 10.8 V. This is factory-trimmed for 12 V supply monitoring and includes 35 mV hysteresis to prevent oscillation near the trip point. The TL7712ACDR datasheet specifies these values under Recommended Operating Conditions with VCC ≥ 3.5 V and TA = 0°C to 70°C.
Does TL7712ACDR require external pull-up resistors on its reset outputs?
Yes, TL7712ACDR features open-collector RESET and RESET outputs, so external pull-up resistors are mandatory for proper logic-level signaling. Typical values are 4.7 kΩ to 10 kΩ to VCC or another compatible rail. Without pull-ups, the outputs remain floating and cannot drive digital inputs reliably. This requirement is explicitly stated in the TL7712ACDR application schematics and switching characteristics section.
Can TL7712ACDR monitor voltages other than 12 V?
Yes - while TL7712ACDR is optimized for 12 V systems, its SENSE input accepts 0 V to 20 V (per Recommended Operating Conditions), allowing use with higher or lower rails via external resistor divider. For example, a 24 V rail can be scaled 2:1 to match the 10.8 V threshold. The TL7712ACDR's internal comparator references the trimmed threshold directly at SENSE, preserving accuracy when properly scaled.
What is the function of the REF pin on TL7712ACDR, and is it mandatory to use?
The REF pin on TL7712ACDR delivers a precision 2.53 V (typ) temperature-compensated reference voltage, usable for external circuitry such as ADC biasing or sensor excitation. A 0.1 µF capacitor to GND is mandatory per datasheet to suppress transients; omitting it risks false resets. While not required for basic reset functionality, REF enhances system integration and reduces need for external references - a key differentiator of the TL7712ACDR.
Is TL7712ACDR pin-compatible with other TL77xxA variants like TL7705ACDR?
No - all TL77xxA devices (TL7702A, TL7705A, TL7709A, TL7712A, TL7715A) share identical 8-pin SOIC (D) package and pinout, including TL7712ACDR. They differ only in factory-trimmed threshold voltage and hysteresis. Thus, TL7712ACDR is mechanically and electrically pin-compatible with TL7705ACDR, but substituting them changes the monitored voltage level (e.g., 4.55 V vs 10.8 V), requiring schematic validation.
TL7712ACDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 10.8V
- Output:
- Open Drain or Open Collector
- Reset:
- Active High/Active Low
- Reset Timeout:
- 1µs Maximum Propagation Delay
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TL7712ACDR FAQ
1.How can I place an order for TL7712ACDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL7712ACDR 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 TL7712ACDR reliable?
The price and inventory of TL7712ACDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL7712ACDR is usually 5 days.
3.What payment methods are accepted for TL7712ACDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL7712ACDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL7712ACDR?
TL7712ACDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL7712ACDR 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 TL7712ACDR?
For technical support, including TL7712ACDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL7712ACDR requirements.
6.How does Aetrix verify that TL7712ACDR is sourced from the original manufacturer or authorized distributors?
All TL7712ACDR 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 TL7712ACDR meets industry standards.
7.What is the process for return or replacement of TL7712ACDR?
All TL7712ACDR units undergo pre-shipment inspection (PSI). If there is an issue with TL7712ACDR, 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 TL7712ACDR part is unused and in its original packaging.
Return procedure for TL7712ACDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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