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Texas Instruments TLC7701IDR
- Part No.:
- TLC7701IDR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC7701IDR.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,907
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Product details
Overview
TLC7701IDR from Texas Instruments is a micropower supply voltage supervisor IC designed for reset control in microcomputer and microprocessor systems. It features a 1.1 V precision sense threshold, programmable delay via external capacitor (td = 2.1 × 10⁴ × CT), 2–6 V supply range, ≤16 µA supply current, and operates from –40°C to 85°C in an SOIC-8 package. It supports power-down control for static RAM with battery backup.
For engineers reviewing the TLC7701IDR datasheet, TLC7701IDR pinout, TLC7701IDR application, or TLC7701IDR equivalent, this page delivers verified specifications, functional context, real-world use cases, and validated alternative options for reliable system-level reset supervision in industrial and medical embedded designs.
Technical Context
The TLC7701IDR implements a precision voltage monitor with temperature-compensated reference and internal timer-based delay logic. During power-on, RESET asserts when VDD ≥ 1 V; thereafter, it monitors SENSE voltage against a fixed 1.1 V threshold (±3% over temperature) and holds RESET active until SENSE exceeds threshold and the externally programmed delay td expires.
It supports dual-output reset signaling (RESET and RESET) with totem-pole outputs, defined behavior down to VDD = 1 V, and integrated logic for static RAM power-fail control via CONTROL input. The device uses no internal voltage divider for threshold setting-unlike other TLC77xx variants-enabling customization with two external resistors per datasheet Figure 10.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sense Threshold Voltage | 1.1 V ±3% (TLC7701-specific fixed threshold; enables precise undervoltage detection at low supply rails) |
| Supply Voltage Range | 2 V to 6 V (supports wide-input industrial and battery-powered systems; RESET defined down to VDD = 1 V) |
| Supply Current | ≤16 µA (typ. 9 µA at 5 V; enables multi-year operation in energy-constrained applications) |
| Delay Time Control | Programmable via external capacitor: td = 2.1 × 10⁴ × CT (e.g., 100 nF yields ~2.1 ms delay; ensures robust system initialization) |
| Operating Temperature | –40°C to +85°C (commercial-grade qualification; suitable for industrial control and medical peripherals) |
| Output Drive | Totem-pole RESET/RESET (IOH = –2 mA, IOL = 2 mA; drives standard CMOS loads without pull-ups) |
| Hysteresis | 30 mV (prevents chatter during slow-rising/falling supply transitions near threshold) |
Pinout & Package
Package: SOIC-8 (D package), 3.90 mm × 4.90 mm body, 1.27 mm pitch, plastic, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary supply rail connection; powers internal reference, comparator, and output drivers |
| GND | Ground reference | Return path for all internal circuitry and output currents; must be low-impedance |
| SENSE | Voltage monitoring input | Connects to monitored rail (e.g., microcontroller VCC); triggers reset when voltage drops below 1.1 V |
| CONTROL | Mode selection input | When tied to GND, configures RESET as active-high; enables RAM power-down control logic |
| RESIN | Manual reset input | Active-low asynchronous reset override; forces RESET assertion regardless of SENSE state |
| RESET | Active-low reset output | Drives microcontroller /RESET pin low during fault or power-up; open-drain compatible with pull-up |
| RESET | Active-high reset output | Complementary to RESET; directly interfaces with logic requiring high-active reset signals |
| CT | Capacitor timing terminal | Connects external timing capacitor to set delay time td; no internal pull; requires stable ceramic cap |
Key Features
| Feature | Design Value |
|---|---|
| Power-on reset generation | Asserts RESET at VDD ≥ 1 V-ensures microcontroller remains held in reset until minimum operating voltage is reached |
| Programmable reset delay | External capacitor sets delay (1.1–4.2 ms typical); eliminates need for discrete RC networks or firmware timers |
| Temperature-compensated reference | Stable 1.1 V threshold across –40°C to +85°C (±3% max drift); avoids calibration in field-deployed systems |
| Static RAM power-down support | CONTROL input enables automatic chip-select disable during brownout-preserves data in battery-backed SRAM |
| Micropower operation | 16 µA max supply current allows integration into always-on subsystems without compromising battery life |
| Defined output behavior at low VDD | RESET/RESET states guaranteed down to VDD = 1 V-critical for graceful shutdown in deep brownout conditions |
Applications
| Medical Imaging Power Sequencing | Industrial PLC Controller Reset |
|---|---|
|
Use Scenario: MRI or ultrasound subsystems require precise, low-power reset sequencing during cold start and brownout recovery. IC Role / Device Role / Timing Role: TLC7701IDR monitors main 3.3 V rail and generates timed reset pulse to FPGA and ADCs after stable voltage is confirmed. Use Value: 1.1 V threshold and 2.1 ms programmable delay ensure clean release of multiple ICs without race conditions; 16 µA quiescent current extends standby battery life. |
Use Scenario: Programmable Logic Controllers operate in harsh environments where voltage sags trigger unintended resets. IC Role / Device Role / Timing Role: TLC7701IDR supervises 5 V I/O rail and asserts RESET to ARM Cortex-M7 core only after sustained undervoltage condition exceeds delay window. Use Value: 30 mV hysteresis prevents oscillation during marginal supply conditions; SOIC-8 package supports automated PCB assembly in high-volume production. |
| Battery-Backed Data Logger | Point-of-Care Diagnostic Device |
|
Use Scenario: Portable environmental sensor nodes retain configuration and last-read data during intermittent battery replacement. IC Role / Device Role / Timing Role: TLC7701IDR's CONTROL input disables SRAM chip select (CS) when main supply fails, enabling seamless switchover to backup coin cell. Use Value: Integrated power-down logic eliminates need for external MOSFET gate driver; 2–6 V supply range accommodates Li-ion and alkaline sources. |
Use Scenario: Handheld blood glucose meters must guarantee safe shutdown and memory retention during rapid battery depletion. IC Role / Device Role / Timing Role: TLC7701IDR monitors 3.0 V LDO output and triggers controlled MCU reset before voltage falls below 2.7 V operational limit. Use Value: Fixed 1.1 V threshold provides margin for LDO dropout; RESET/RESET dual outputs simplify interface to both MCU and display controller logic families. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC7701QDR | Same functionality and pinout; qualified for –40°C to +125°C extended temperature range | Required for under-hood automotive or high-ambient industrial deployments where 85°C upper limit is insufficient | Select TLC7701QDR when operating ambient exceeds 85°C; otherwise TLC7701IDR meets commercial-grade requirements at lower cost |
| TPS3808G12DBVR | Fixed 1.22 V threshold, 200 ms factory-programmed delay, 1.5 µA typical IQ, SOT-23-6 package | Lacks manual reset (RESIN) and CONTROL inputs; no RAM power-down support; smaller footprint but less flexible timing | Choose TPS3808G12DBVR for space-constrained, ultra-low-power apps where fixed delay suffices and RAM control is unnecessary |
Compared with TLC7701QDR and TPS3808G12DBVR, the TLC7701IDR uniquely balances programmable delay, dual reset outputs, RAM power-down logic, and commercial-temperature reliability in a standard SOIC-8-making it optimal for cost-sensitive, feature-complete embedded reset supervision.
Availability
TLC7701IDR is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostic peripherals, and battery-backed data loggers requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for TLC7701IDR 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and design-in support.
The TLC77xx family was engineered specifically for micropower voltage supervision in resource-constrained microcomputer systems-prioritizing low IQ, precise thresholds, and integrated power-fail response without external logic.
FAQ
What is the exact sense threshold voltage of the TLC7701IDR and how stable is it over temperature?
The TLC7701IDR has a nominal sense threshold voltage of 1.1 V, with a maximum deviation of ±3% across its full operating temperature range of –40°C to +85°C. This stability is achieved through an internal temperature-compensated voltage reference, eliminating the need for external calibration in most embedded applications. The datasheet specifies VIT– = 1.04 V (min) to 1.16 V (max) at VDD = 2–6 V.
Can the TLC7701IDR be used to control battery-backed static RAM during power failure?
Yes-the TLC7701IDR includes dedicated CONTROL and RESIN inputs to enable automatic static RAM power-down. When CONTROL is grounded, the RESET output can drive the memory's chip select (CS) line, disabling access during brownout. This function is explicitly documented in the datasheet's Figure 10 and Application Information section, confirming direct support for SRAM data retention in the TLC7701IDR.
How is the reset delay time set on the TLC7701IDR, and what capacitor value yields a 2.5 ms delay?
The reset delay time td is set by an external capacitor connected to the CT pin, using the formula td = 2.1 × 10⁴ × CT. For a 2.5 ms delay, solve CT = td / 2.1 × 10⁴ = 0.0025 / 21000 ≈ 119 nF. A standard 120 nF ceramic capacitor achieves this, matching the typical 2.1 ms value shown in the Switching Characteristics table with CT = 100 nF.
Is the TLC7701IDR pin-compatible with other members of the TLC77xx family, such as the TLC7705IDR?
No-the TLC7701IDR shares the same SOIC-8 package and pinout with other TLC77xx devices (e.g., TLC7705IDR), but its internal threshold is fixed at 1.1 V and it supports external resistor customization for alternate thresholds, unlike the fixed-threshold-only variants. Pin compatibility exists physically and electrically, but functional substitution requires verification of threshold match and CONTROL/RESIN usage in the target design.
What is the maximum supply current of the TLC7701IDR, and under what conditions is it measured?
The maximum supply current of the TLC7701IDR is 16 µA, measured under recommended operating conditions: VDD = 5 V, RESIN = VDD, SENSE = VDD ≥ VITmax + 0.2 V, CONTROL = 0 V, and outputs open. This value appears in the Electrical Characteristics table under "IDD Supply current" and reflects worst-case quiescent consumption during active supervision-critical for battery-life estimation in always-on systems.
TLC7701IDR 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:
- 1.1V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High/Active Low
- Reset Timeout:
- 1.1ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TLC7701IDR FAQ
1.How can I place an order for TLC7701IDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC7701IDR 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 TLC7701IDR reliable?
The price and inventory of TLC7701IDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC7701IDR is usually 5 days.
3.What payment methods are accepted for TLC7701IDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC7701IDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC7701IDR?
TLC7701IDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC7701IDR 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 TLC7701IDR?
For technical support, including TLC7701IDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC7701IDR requirements.
6.How does Aetrix verify that TLC7701IDR is sourced from the original manufacturer or authorized distributors?
All TLC7701IDR 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 TLC7701IDR meets industry standards.
7.What is the process for return or replacement of TLC7701IDR?
All TLC7701IDR units undergo pre-shipment inspection (PSI). If there is an issue with TLC7701IDR, 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 TLC7701IDR part is unused and in its original packaging.
Return procedure for TLC7701IDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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