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Texas Instruments TLC7701QD
- Part No.:
- TLC7701QD
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC7701QD.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,841
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Product details
Overview
TLC7701QD from Texas Instruments is a micropower supply voltage supervisor IC with 1.1 V precision sense threshold, programmable reset delay via external capacitor, and operation over –40°C to 125°C. It provides power-on reset generation, undervoltage supervision, and power-down control for static RAM with battery backup in microprocessor systems.
For engineers reviewing the TLC7701QD datasheet, TLC7701QD pinout, TLC7701QD application, or TLC7701QD equivalent, this page delivers verified specifications including 16 µA max supply current, 1 V power-up reset activation, totem-pole RESET/RESET outputs, and SOIC-8 package compatibility for industrial and automotive embedded designs.
Technical Context
The TLC7701QD implements a precision voltage sensor with temperature-compensated reference and hysteresis (70 mV) to prevent chatter during threshold crossing. Its internal timer generates a user-defined delay (td = 2.1 × 10⁴ × CT) after SENSE voltage recovers above threshold before deasserting RESET.
It supports dual-output active-high and active-low reset signaling, with CONTROL pin enabling RAM power-down mode when grounded. The device asserts RESET when VDD ≥ 1 V and maintains reset while SENSE remains below 1.1 V, ensuring reliable system initialization under brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sense Threshold | 1.1 V ±0.06 V - precisely monitors 1.1 V rail for undervoltage detection in low-voltage microcontroller systems |
| Supply Current | 9–16 µA - enables multi-year battery operation in always-on monitoring applications |
| Operating Temp | –40°C to 125°C - qualified for under-hood automotive and industrial control environments |
| Reset Delay | Programmable via external CT (e.g., 100 nF → ~2.1 ms) - ensures sufficient hold time for processor boot sequence |
| Output Type | Totem-pole RESET and open-drain RESET - supports direct interface to MCU reset inputs and memory CS lines |
| VDD Range | 2 V to 6 V - compatible with 3.3 V and 5 V logic domains without level-shifting |
| Hysteresis | 70 mV - prevents oscillation during slow-rising or noisy supply transitions |
Pinout & Package
Package: SOIC-8 (D package), 3.9 mm × 4.9 mm body, 1.27 mm pitch, RoHS-compliant NIPDAU lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VDD) | Positive supply input | Accepts 2–6 V; RESET activates at ≥1 V; powers internal reference and comparator |
| 2 (SENSE) | Voltage monitor input | Compares against 1.1 V threshold; requires bypass capacitor for stability |
| 3 (CONTROL) | RAM power-down mode select | Grounding enables active-high RESET for chip-select control of battery-backed SRAM |
| 4 (GND) | Ground reference | Return path for all internal circuits and output drivers |
| 5 (RESET) | Active-low reset output | Open-drain output; requires external pull-up; asserts low during fault or power-up |
| 6 (RESET) | Active-high reset output | Totem-pole output; drives high during normal operation; low during reset |
| 7 (RESIN) | Manual reset input | Pull low to force reset; accepts 0–VDD logic levels; debounced internally |
| 8 (NC) | No connect | Not bonded; must be left unconnected per TI design |
Key Features
| Feature | Design Value |
|---|---|
| Power-on reset generator | Guarantees RESET assertion at VDD ≥ 1 V, independent of SENSE voltage, ensuring boot integrity |
| Programmable delay time | Enables precise reset hold duration tuning (ms range) using standard ceramic capacitors, eliminating fixed-timer limitations |
| Temperature-compensated reference | Maintains ±1% threshold accuracy across –40°C to 125°C, critical for thermal-stable system resets |
| Defined RESET from VDD ≥ 1 V | Allows reset assertion even during deep brownout, supporting fail-safe shutdown in low-VDD scenarios |
| Power-down control support | Directly disables SRAM chip select during power loss when CONTROL = GND, preserving data with battery backup |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Monitors 5 V microcontroller supply during cold cranking where battery voltage dips to 6–9 V. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET until VDD stabilizes above 1.1 V and sustains for programmable delay. Use Value: Prevents corrupted firmware execution during marginal supply conditions, meeting ISO 16750-2 transient immunity requirements. |
Use Scenario: Ensures deterministic restart of ARM-based controller after AC line interruption in factory automation cabinet. IC Role / Device Role / Timing Role: Generates synchronized active-high RESET and active-low RESET signals for CPU and peripheral isolation. Use Value: Eliminates need for discrete RC timing networks, reducing BOM count and improving reset timing repeatability across temperature. |
| Medical Imaging Power Sequencer | Telecom Remote Radio Unit (RRU) |
|
Use Scenario: Supervises auxiliary 3.3 V rail powering FPGA configuration circuitry in MRI subsystems. IC Role / Device Role / Timing Role: Provides 1.1 V threshold detection with 70 mV hysteresis to reject noise on sensitive analog power rails. Use Value: Avoids false resets caused by switching regulator ripple, ensuring uninterrupted image acquisition sequences. |
Use Scenario: Controls graceful shutdown of baseband processor during 48 V DC input sag in outdoor wireless infrastructure. IC Role / Device Role / Timing Role: Uses CONTROL pin to enable SRAM retention mode and assert RESET to halt processing prior to power collapse. Use Value: Preserves last-known operational state in battery-backed memory, enabling rapid recovery post-interruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB29DBVR | Fixed 2.93 V threshold, 350 ms factory-programmed delay, SOT-23-5 package | Lacks programmable delay and CONTROL pin; no SRAM power-down support | Select when fixed delay and smaller footprint outweigh flexibility needs |
| TPS3808G12QDBVRQ1 | 1.2 V threshold, 200 ms min delay, automotive AEC-Q100 Grade 1, enable input instead of CONTROL | Requires external logic for SRAM control; higher quiescent current (8 µA typ vs 12 µA max) | Prefer for automotive-qualified designs requiring extended temperature validation and enhanced ESD robustness |
Compared with TLV803EB29DBVR and TPS3808G12QDBVRQ1, the TLC7701QD uniquely combines user-programmable delay, dual active-high/low outputs, and dedicated SRAM power-down control-making it optimal for legacy and cost-sensitive industrial systems requiring design flexibility without re-spinning PCB layout.
Availability
TLC7701QD is available at Aetrix Electronics and suitable for automotive engine control, industrial PLCs, medical imaging subsystems, and telecom remote radio units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLC7701QD 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 industrial-grade qualification.
The TLC77xx family was designed specifically for micropower voltage supervision in microcomputer and microprocessor systems, emphasizing ultra-low current consumption, wide temperature operation, and flexible reset timing control.
FAQ
What is the exact sense threshold voltage of the TLC7701QD?
The TLC7701QD 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 across its full operating temperature range of –40°C to 125°C. This precision threshold is achieved using an internal temperature-compensated voltage reference and applies directly to the SENSE pin input.
How does the TLC7701QD generate its reset delay time?
The TLC7701QD generates reset delay time (td) using an external capacitor (CT) connected to the SENSE pin. 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 approximately 2.1 ms delay. This method allows field-adjustable timing without trimming resistors or firmware changes.
Can the TLC7701QD be used to retain data in battery-backed SRAM during power loss?
Yes, the TLC7701QD supports SRAM data retention during power loss via its CONTROL pin. When CONTROL is tied to GND, the RESET output becomes active-high and can drive the chip select (CS) line of static RAM. This automatically disables memory access during brownout, while the device itself remains powered by the backup battery to maintain supervision function.
What is the maximum supply current of the TLC7701QD at 5 V and 125°C?
The maximum supply current of the TLC7701QD is 16 µA, specified over the full recommended operating conditions including VDD = 2 V to 6 V and temperature range –40°C to 125°C. This value is confirmed in the Electrical Characteristics table of the SLVS087M datasheet and applies regardless of output loading or delay capacitor presence.
Does the TLC7701QD have both active-high and active-low reset outputs?
Yes, the TLC7701QD provides two complementary reset outputs: RESET (active-high, totem-pole) and RESET (active-low, open-drain). This dual-output architecture allows direct connection to MCUs requiring either polarity reset signal and enables simultaneous control of multiple subsystems-such as asserting RESET to halt CPU execution while pulling RESET low to disable peripherals.
TLC7701QD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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-SOIC
TLC7701QD FAQ
1.How can I place an order for TLC7701QD through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC7701QD 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 TLC7701QD reliable?
The price and inventory of TLC7701QD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC7701QD is usually 5 days.
3.What payment methods are accepted for TLC7701QD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC7701QD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC7701QD?
TLC7701QD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC7701QD 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 TLC7701QD?
For technical support, including TLC7701QD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC7701QD requirements.
6.How does Aetrix verify that TLC7701QD is sourced from the original manufacturer or authorized distributors?
All TLC7701QD 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 TLC7701QD meets industry standards.
7.What is the process for return or replacement of TLC7701QD?
All TLC7701QD units undergo pre-shipment inspection (PSI). If there is an issue with TLC7701QD, 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 TLC7701QD part is unused and in its original packaging.
Return procedure for TLC7701QD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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