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Texas Instruments TLC7701QPW
- Part No.:
- TLC7701QPW
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC7701QPW.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:650
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Product details
Overview
TLC7701QPW 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 time via external capacitor (td = 2.1 × 10⁴ × CT), defined RESET output down to VDD ≥ 1 V, and operates across –40°C to 125°C. It supports power-down control for static RAM with battery backup in medical imaging and industrial control applications.
For engineers reviewing the TLC7701QPW datasheet, TLC7701QPW pinout, TLC7701QPW application, or TLC7701QPW equivalent, this page delivers verified specifications, TSSOP-8 package details, functional block context, real-world use cases in power-fail retention and cold-start sequencing, and validated alternative parts with explicit technical distinctions.
Technical Context
The TLC7701QPW implements a precision voltage-sensing comparator with temperature-compensated reference, internal power-on-reset generator, and an external capacitor–controlled delay timer. Its SENSE input monitors supply or rail voltage, asserting active-low RESET when VI(SENSE) drops below 1.1 V (with 30 mV hysteresis), holding it active for td after recovery.
It supports dual-mode operation: when CONTROL is grounded, RESET becomes active-high; when CONTROL is high, RESET remains active-low. This enables flexible integration with memory chip-select logic during brownout events-critical for data retention in battery-backed SRAM systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - supports wide-input industrial and automotive auxiliary rails. |
| Sense Threshold Voltage | 1.1 V (min 1.04 V, max 1.16 V) - precise undervoltage detection for 1.2 V or 1.8 V logic domains. |
| Hysteresis Voltage | 30 mV - prevents chatter near threshold during slow-rising/falling supplies. |
| Supply Current | 9 µA to 16 µA - enables multi-year battery life in always-on monitoring circuits. |
| Delay Time Formula | td = 2.1 × 10⁴ × CT - allows user-defined reset hold time (e.g., 2.1 ms with 100 nF). |
| Operating Temperature | –40°C to 125°C - qualified for under-hood, industrial, and extended-range embedded environments. |
| Output Type | Totem-pole - drives loads directly without pull-up resistors; supports 2 mA sink/source. |
Pinout & Package
TLC7701QPW is housed in an 8-pin TSSOP (PW) package, 3.0 mm × 4.4 mm, 0.65 mm pitch, RoHS-compliant, with moisture sensitivity level (MSL) 1 and peak reflow rating of 260°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Accepts 2–6 V; powers internal reference, comparator, and output stage. |
| GND | Ground reference | Return path for all currents; must be low-impedance for stable threshold accuracy. |
| SENSE | Voltage monitor input | Compares applied voltage against 1.1 V internal reference; bypass capacitor recommended. |
| CONTROL | Reset polarity selector | Low = active-high RESET; high = active-low RESET - enables SRAM CS control logic. |
| RESIN | Manual reset input | Active-low asynchronous reset override; valid at 0.2×VDD (low) / 0.7×VDD (high). |
| RESET | Complementary reset output | Active-low open-drain/totem-pole output; asserts when SENSE < threshold or RESIN low. |
| RESET | Complementary reset output | Active-high counterpart to RESET; polarity follows CONTROL state. |
| NC | No connect | Pin 8 is unconnected - no internal bond; must remain floating or grounded per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable delay time | External capacitor sets reset hold duration (e.g., 100 nF → ~2.1 ms), eliminating fixed-timer ICs. |
| Power-down control support | CONTROL pin enables automatic SRAM disable during power loss - preserves data in battery-backed systems. |
| Defined RESET at VDD ≥ 1 V | Guarantees valid reset assertion even during deep brownout or ultra-low-power wake-up sequences. |
| Temperature-compensated reference | Maintains ±1.5% threshold stability over –40°C to 125°C - critical for automotive and industrial reliability. |
| 16 µA max supply current | Enables continuous supervision in energy-constrained IoT edge nodes and portable medical devices. |
Applications
| Medical Imaging Power Sequencing | Industrial PLC Brownout Protection |
|---|---|
|
Use Scenario: MRI and ultrasound subsystems require precise power-up sequencing and fail-safe shutdown during AC line interruption. IC Role / Device Role / Timing Role: TLC7701QPW monitors 3.3 V and 1.2 V rails, asserts RESET until both stabilize, then holds for programmable delay before releasing processor. Use Value: Prevents corrupted image acquisition or firmware lockup by ensuring clean boot after power restoration. |
Use Scenario: Programmable logic controllers operate in harsh factory environments with unstable 24 V DC supplies prone to dips. IC Role / Device Role / Timing Role: TLC7701QPW senses 5 V logic rail; triggers controlled I/O freeze and nonvolatile register save upon undervoltage detection. Use Value: Eliminates spurious relay actuation or sensor misreads during transient sags - improves system MTBF. |
| Battery-Backed SRAM Data Retention | Automotive Infotainment Cold-Start Reset |
|
Use Scenario: Telematics modules retain GPS logs and configuration in static CMOS RAM during ignition-off periods. IC Role / Device Role / Timing Role: TLC7701QPW's CONTROL pin ties to microcontroller bank select; RESET drives SRAM CS to disable writes during main supply collapse. Use Value: Ensures zero data corruption during 12 V battery drop to 6 V - meets AEC-Q100 Class 0 transient immunity. |
Use Scenario: Head units must initialize cleanly after vehicle cold crank (battery dips to 6 V then surges to 14 V). IC Role / Device Role / Timing Role: TLC7701QPW monitors 5 V LDO output; asserts RESET until voltage exceeds 1.1 V and remains stable for >2 ms. Use Value: Guarantees DSP and display controller reset only after stable power - avoids GUI hang or audio artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3801K33DBVR | Fixed 3.3 V threshold; no external delay capacitor; 1.6 µA quiescent current; push-pull RESET only. | Lacks programmable delay and dual-polarity RESET; unsuitable for SRAM power-down control. | Select when fixed-threshold, ultra-low-IQ supervision suffices and delay timing is handled externally. |
| MAX6326LT11D2T | 1.1 V threshold; fixed 200 ms delay; no CONTROL pin; open-drain RESET only; –40°C to 85°C. | Cannot support active-high RESET or battery-backed SRAM disable; limited temperature range. | Choose for cost-sensitive consumer designs where extended temp range and polarity flexibility are unnecessary. |
Compared with TLC7701QPW, TPS3801K33DBVR offers lower IQ but forfeits delay programmability and SRAM control capability, while MAX6326LT11D2T provides simpler integration at the expense of industrial temperature support and functional flexibility.
Availability
TLC7701QPW is available at Aetrix Electronics and suitable for medical imaging power sequencing, industrial PLC brownout protection, and battery-backed SRAM data retention requiring stable component supply across extended temperature ranges.
Supply support for TLC7701QPW 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 automotive/industrial qualification.
The TLC77xx family was engineered specifically for robust, low-power supply monitoring in mission-critical embedded systems - prioritizing precision threshold stability, wide temperature operation, and flexible reset control logic.
FAQ
What is the exact sense threshold voltage of the TLC7701QPW?
The TLC7701QPW has a nominal sense threshold voltage of 1.1 V, with guaranteed minimum and maximum values of 1.04 V and 1.16 V respectively, measured across the full operating temperature range of –40°C to 125°C and supply voltage range of 2 V to 6 V.
How does the CONTROL pin affect the RESET output behavior of the TLC7701QPW?
When CONTROL is tied to GND, the TLC7701QPW configures RESET as active-high and RESET as active-low. When CONTROL is pulled high, both outputs revert to active-low polarity. This dual-mode capability enables direct interfacing with SRAM chip-select logic during power failure scenarios.
Can the TLC7701QPW generate a reset pulse longer than 10 ms?
Yes - the TLC7701QPW's delay time is set by an external capacitor using td = 2.1 × 10⁴ × CT. A 1 µF capacitor yields ~21 ms delay, and larger values extend it further. The device supports capacitors up to at least 10 µF, enabling delays beyond 200 ms with appropriate tolerance and leakage considerations.
Is the TLC7701QPW compatible with 1.8 V logic systems?
Yes - the TLC7701QPW operates down to VDD = 2 V and features input thresholds referenced to VDD (e.g., VIH = 0.7 × VDD). At 2 V supply, its RESIN and CONTROL inputs recognize logic high above 1.4 V and low below 0.6 V, making it interoperable with 1.8 V I/O domains when powered from a compatible rail.
Does the TLC7701QPW require an external bypass capacitor on VDD?
Yes - the datasheet specifies that a ceramic bypass capacitor (0.1 µF) must be placed near the VDD and GND pins to ensure stable operation and optimal threshold voltage accuracy. This minimizes noise coupling into the precision reference and comparator circuitry of the TLC7701QPW.
TLC7701QPW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
TLC7701QPW FAQ
1.How can I place an order for TLC7701QPW through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC7701QPW 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 TLC7701QPW reliable?
The price and inventory of TLC7701QPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC7701QPW is usually 5 days.
3.What payment methods are accepted for TLC7701QPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC7701QPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC7701QPW?
TLC7701QPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC7701QPW 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 TLC7701QPW?
For technical support, including TLC7701QPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC7701QPW requirements.
6.How does Aetrix verify that TLC7701QPW is sourced from the original manufacturer or authorized distributors?
All TLC7701QPW 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 TLC7701QPW meets industry standards.
7.What is the process for return or replacement of TLC7701QPW?
All TLC7701QPW units undergo pre-shipment inspection (PSI). If there is an issue with TLC7701QPW, 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 TLC7701QPW part is unused and in its original packaging.
Return procedure for TLC7701QPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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