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Texas Instruments TLC7701QP
- Part No.:
- TLC7701QP
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TLC7701QP.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,297
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Product details
Overview
TLC7701QP 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), defined RESET output down to VDD ≥ 1 V, and operates across –40°C to 125°C. Used in medical imaging and industrial embedded systems requiring reliable power-on and undervoltage reset.
For engineers reviewing the TLC7701QP datasheet, TLC7701QP pinout, TLC7701QP application, or TLC7701QP equivalent, this page delivers verified specifications, DRB-package pin mapping, temperature-rated performance data, and real-world use cases for battery-backed static RAM power-down control and microcontroller reset sequencing.
Technical Context
The TLC7701QP implements a precision voltage-sensing comparator with temperature-compensated reference, automatic reset assertion during power-up (Vres = 1 V) and undervoltage events (VIT– = 1.1 V ±60 mV), and an internal timer that enforces a user-defined delay before deasserting RESET. Its dual-output architecture (RESET and RESET) supports active-high and active-low logic families simultaneously.
Unlike fixed-threshold variants in the TLC77xx family, the TLC7701QP allows threshold customization using two external resistors on the SENSE input, enabling flexible monitoring of non-standard supply rails. It supports power-down control for static RAM by driving chip select (CS) during brownout, with CONTROL pin logic determining RESET polarity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - Supports wide-input industrial and battery-powered systems without external regulation. |
| Sense Threshold Voltage | 1.1 V (min 1.04 V, max 1.16 V) - Precision monitoring of low-voltage rails such as 1.2 V or 1.8 V domains. |
| Power-Up Reset Voltage | 1 V - Ensures early, deterministic reset assertion before core logic becomes operational. |
| Max Supply Current | 16 µA - Enables multi-year operation in battery-backed applications like medical data loggers. |
| Operating Temperature | –40°C to 125°C - Qualified for under-hood automotive and high-reliability industrial environments. |
| Delay Time Formula | td = 2.1 × 10⁴ × CT - Enables precise, capacitor-tuned reset hold times from milliseconds to seconds. |
| Output Drive Strength | ±2 mA - Sufficient to directly drive microcontroller reset inputs and small logic loads without buffering. |
Pinout & Package
Package: PDIP-8 (Plastic Dual In-line Package, 0.300-inch width), RoHS-compliant, NIPDAU lead finish, rated for –40°C to 125°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply input | Accepts 2–6 V; powers internal reference, comparator, and outputs; RESET defined down to 1 V. |
| GND | Ground reference | Common return path for all internal circuitry and output loads. |
| SENSE | Voltage monitor input | Compares applied voltage against internal 1.1 V reference; configurable via external resistor divider. |
| CONTROL | Polarity selection input | When tied to GND, RESET is active-high; when tied to VDD, RESET is active-low - enables interface flexibility. |
| RESIN | Manual reset input | Active-low asynchronous reset override; forces RESET assertion regardless of SENSE state. |
| RESET | Complementary active-low output | Open-drain/totem-pole capable; drives low during reset condition; requires pull-up for open-drain mode. |
| RESET | Complementary active-high output | Push-pull output; asserts high during reset; eliminates need for external pull-up in most MCU interfaces. |
| NC | No connect | Pin 8 is unconnected; must remain floating or grounded per layout guidelines to avoid noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable delay time | Set precisely via external capacitor (CT); avoids fixed-timing limitations of monolithic supervisors. |
| Power-down control support | Enables automatic disabling of static RAM during power loss by coordinating CONTROL and RESET signals. |
| Defined RESET output at VDD ≥ 1 V | Guarantees valid reset assertion even during deep brownout, critical for non-volatile memory retention. |
| Temperature-compensated reference | Maintains ±1.5% threshold accuracy over –40°C to 125°C, eliminating calibration in harsh environments. |
| Low quiescent current (16 µA) | Reduces standby power in always-on systems; extends battery life in portable diagnostic equipment. |
Applications
| Medical Imaging Power Sequencing | Industrial PLC Controller Reset |
|---|---|
|
Use Scenario: MRI and ultrasound subsystems require synchronized power-up of FPGA, ADC, and analog front-end with guaranteed timing margins. IC Role / Device Role: TLC7701QP monitors 3.3 V and 1.2 V rails, asserts RESET until both stabilize, and holds reset for 100 ms via 0.01 µF capacitor. Use Value: Prevents metastability and configuration errors in FPGA bitstreams by enforcing minimum power-rail hold time before release. |
Use Scenario: Programmable logic controllers operate in factory-floor cabinets where 24 V DC supplies experience ripple and transient sags. IC Role / Device Role: TLC7701QP senses 5 V logic rail; RESIN tied to watchdog signal; CONTROL grounded for active-high RESET to ARM Cortex-M7. Use Value: Eliminates software lockups by combining power-supply supervision with hardware watchdog integration. |
| Battery-Backed Data Logger | Automotive Body Control Module |
|
Use Scenario: Portable ECG recorders retain patient data in SRAM during main battery replacement or depletion. IC Role / Device Role: TLC7701QP's CONTROL pin driven by microcontroller bank-select signal; RESET disables SRAM CS during VDD drop below 2.7 V. Use Value: Ensures zero data corruption during switchover to backup coin cell by gating memory access before voltage collapse. |
Use Scenario: BCMs manage door locks, lighting, and sensors powered from vehicle battery subject to cranking dips (4.5 V). IC Role / Device Role: TLC7701QP monitors 5 V regulator output; SENSE tied to regulated rail; RESET drives microcontroller reset with 200 ms delay. Use Value: Maintains functional safety by preventing erratic behavior during engine start, meeting ISO 16750-2 pulse 4 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC7701QD | SOIC-8 package (3.9 mm × 4.9 mm), same electrical specs and temperature range (–40°C to 125°C). | Preferred for space-constrained PCBs; requires rework of footprint and thermal relief design. | Select when board area is limited and surface-mount assembly is available. |
| TPS3808G12QDBVRQ1 | Automotive-grade (AEC-Q100), fixed 1.22 V threshold, 350 ms factory-programmed delay, 2.5 µA IQ. | Designed for automotive infotainment; lacks manual RESIN and CONTROL pins; no external delay tuning. | Choose for ASIL-B systems needing certified qualification and ultra-low IQ, but not for custom delay or dual-output needs. |
Compared with TLC7701QD, the TLC7701QP offers through-hole mounting and higher thermal mass for high-temperature ambient operation; compared with TPS3808G12QDBVRQ1, it provides field-programmable delay and full pin-level control-critical for legacy system upgrades and medical device validation.
Availability
TLC7701QP is available at Aetrix Electronics and suitable for medical imaging systems, industrial PLCs, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLC7701QP 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 company specializing in analog and embedded processing solutions, with leadership in power management, signal chain, and high-reliability ICs.
The TLC77xx family was developed specifically for robust, low-power supply supervision in mission-critical embedded systems-emphasizing precision threshold stability, wide temperature operation, and flexible reset timing control.
FAQ
What is the exact sense threshold voltage of the TLC7701QP?
The TLC7701QP has a nominal sense threshold voltage of 1.1 V, with a guaranteed range of 1.04 V to 1.16 V over its full operating temperature range (–40°C to 125°C). This value applies when SENSE is connected directly to the monitored rail; external resistor dividers allow adjustment to other thresholds, consistent with the TLC7701QP's design as the only customizable variant in the TLC77xx family.
Does the TLC7701QP support active-high and active-low reset outputs simultaneously?
Yes, the TLC7701QP provides both RESET (active-low) and RESET (active-high) outputs on separate pins. The CONTROL pin determines polarity logic: when CONTROL = GND, RESET is active-high and RESET is active-low; when CONTROL = VDD, their states invert. This dual-output capability eliminates external inverters in mixed-logic systems and simplifies interface to diverse microcontrollers.
How is the reset delay time set on the TLC7701QP?
The reset delay time (td) on the TLC7701QP is set externally using a capacitor (CT) connected between the CT pin and GND. The relationship is td = 2.1 × 10⁴ × CT, where CT is in farads and td is in seconds. For example, a 100 nF capacitor yields ~2.1 ms delay. This programmability enables precise tailoring to system boot requirements without firmware changes or component substitution.
Can the TLC7701QP be used in battery-backed SRAM applications?
Yes, the TLC7701QP explicitly supports power-down control for static RAM with battery backup. When CONTROL is driven by the memory bank select signal and RESET controls the SRAM chip select (CS), the device automatically disables memory access during main supply failure. This function is documented in Figure 10 of the SLVS087M datasheet and validated for use in medical data loggers and industrial controllers where data integrity is critical.
What is the maximum supply current of the TLC7701QP across temperature?
The TLC7701QP draws a maximum supply current of 16 µA over its full operating temperature range (–40°C to 125°C) and supply voltage range (2 V to 6 V), as specified in the Electrical Characteristics table of the SLVS087M datasheet. This ultra-low quiescent current enables multi-year operation in battery-powered applications such as portable diagnostics and remote sensors without compromising supervision reliability.
TLC7701QP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
TLC7701QP FAQ
1.How can I place an order for TLC7701QP through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC7701QP 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 TLC7701QP reliable?
The price and inventory of TLC7701QP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC7701QP is usually 5 days.
3.What payment methods are accepted for TLC7701QP?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC7701QP?
TLC7701QP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC7701QP 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 TLC7701QP?
For technical support, including TLC7701QP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC7701QP requirements.
6.How does Aetrix verify that TLC7701QP is sourced from the original manufacturer or authorized distributors?
All TLC7701QP 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 TLC7701QP meets industry standards.
7.What is the process for return or replacement of TLC7701QP?
All TLC7701QP units undergo pre-shipment inspection (PSI). If there is an issue with TLC7701QP, 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 TLC7701QP part is unused and in its original packaging.
Return procedure for TLC7701QP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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