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Texas Instruments TLC7703IPWG4
- Part No.:
- TLC7703IPWG4
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC7703IPWG4.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,040
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Product details
Overview
TLC7703IPWG4 from Texas Instruments is a micropower supply voltage supervisor IC with fixed 2.63 V threshold, active-low RESET output, and programmable delay via external capacitor. It operates from 2 V to 6 V supply, draws ≤16 µA quiescent current, and supports power-down control for battery-backed static RAM. It is used in medical imaging systems requiring reliable undervoltage detection and clean reset assertion during brownout.
For engineers reviewing the TLC7703IPWG4 datasheet, TLC7703IPWG4 pinout, TLC7703IPWG4 application, or TLC7703IPWG4 equivalent, this page delivers verified specifications, DRB-package terminal mapping, real-world use cases in power-critical embedded systems, and validated alternative options for design flexibility and supply continuity.
Technical Context
The TLC7703IPWG4 implements a precision voltage-sensing comparator with temperature-compensated internal reference and hysteresis (70 mV) to prevent chatter near threshold. Its power-on reset generator asserts RESET when VDD reaches ≥1 V, then transitions to undervoltage supervision once VDD ≥2 V is established.
Delay time (td = 2.1 × 10⁴ × CT) is externally set by capacitor CT on the CT pin, enabling configurable reset hold duration from ~1.1 ms to >4 ms. The CONTROL input allows active-high RESET behavior when grounded, supporting memory bank disable during power failure in battery-backed SRAM applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 2.63 V (fixed negative-going SENSE threshold; ensures stable reset release at nominal 2.63 V ±70 mV hysteresis) |
| Supply Range | 2 V to 6 V (supports single-cell Li-ion, 3.3 V, and 5 V rail monitoring without external regulation) |
| Quiescent Current | ≤16 µA (enables multi-year battery operation in portable medical and industrial sensors) |
| Reset Delay | Programmable via CT pin (1.1–4.2 ms typical with 100 nF; ensures sufficient system stabilization before release) |
| Operating Temp | –40°C to 85°C (qualified for commercial/industrial ambient environments; matches SOIC-D and TSSOP variants) |
| Output Type | Active-low totem-pole RESET (drives low to <0.5 V at 2 mA; compatible with standard CMOS logic inputs) |
| Power-Up Reset | Asserts RESET at VDD ≥1 V (guarantees early initialization before core logic becomes functional) |
Pinout & Package
The TLC7703IPWG4 is housed in an 8-pin 3×3 mm SON (DRB) package with wettable flanks, optimized for automated optical inspection and high-reliability medical imaging applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Return path for all internal circuitry and output drivers; must be low-impedance connection to system ground plane |
| VDD | Positive supply input | Primary power source (2–6 V); bypass capacitor (0.1 µF ceramic) required near pin for noise immunity |
| SENSE | Voltage monitor input | Monitors regulated rail; asserts RESET when voltage drops below 2.63 V (with 70 mV hysteresis) |
| RESET | Active-low reset output | Drives microcontroller / FPGA / ASIC reset input low during fault; open-drain compatible with pull-up |
| CONTROL | Reset polarity control | Grounding forces active-high RESET behavior; floating or high disables polarity inversion |
| RESIN | Manual reset input | Active-low asynchronous reset trigger; overrides voltage monitoring when pulled low |
| CT | Delay timing capacitor connection | Connects external capacitor to set reset hold time (td = 2.1 × 10⁴ × CT); no internal pull-up/down |
| NC | No connect | Internally unconnected; must remain unconnected per TI specification to avoid malfunction |
Key Features
| Feature | Design Value |
|---|---|
| Programmable reset delay | Configurable hold time (1.1–4.2 ms typical) via single external capacitor-eliminates need for discrete RC networks or timers |
| Ultra-low supply current | ≤16 µA max at 5 V enables integration into always-on battery-powered devices without compromising runtime |
| Defined reset at low VDD | Guaranteed RESET assertion down to VDD = 1 V-ensures robust startup sequencing even with slow-ramping supplies |
| Power-down memory control | CONTROL pin enables automatic SRAM chip-select disable during brownout-preserves data integrity in backup-battery systems |
| Temperature-compensated reference | Stable 2.63 V threshold across –40°C to 85°C-avoids false resets due to thermal drift in industrial enclosures |
Applications
| Medical Imaging Power Sequencing | Industrial PLC I/O Module Supervision |
|---|---|
|
Use Scenario: MRI and ultrasound subsystems require precise power-rail sequencing and brownout protection to prevent corrupted image acquisition or sensor calibration loss. IC Role / Device Role / Timing Role: TLC7703IPWG4 monitors 3.3 V analog front-end supply and asserts RESET until voltage stabilizes above 2.63 V with 2.1 ms delay. Use Value: Prevents partial initialization of ADCs and clock generators, eliminating spurious artifacts in raw image data streams. |
Use Scenario: Programmable logic controllers use isolated I/O modules where undervoltage on field-side rails must trigger safe shutdown before communication errors occur. IC Role / Device Role / Timing Role: TLC7703IPWG4 supervises 5 V isolated DC-DC output and drives FPGA configuration reset with 1.1 ms hold time. Use Value: Ensures deterministic state recovery after transient dips-no firmware corruption or watchdog timeout cascades. |
| Battery-Backed Data Logger | Automotive Infotainment Head Unit |
|
Use Scenario: Remote environmental loggers operate on coin-cell batteries for years; voltage sag during cold start must not corrupt stored sensor history. IC Role / Device Role / Timing Role: TLC7703IPWG4 senses main 3.0 V rail and uses CONTROL pin to enable active-high RESET for SRAM retention control. Use Value: Triggers automatic CS deassertion on static RAM when VDD falls below 2.63 V-preserves last 10k samples without external logic. |
Use Scenario: Infotainment head units experience load-dump transients and cold-crank voltage drops; MCU must reset cleanly without latch-up or bus contention. IC Role / Device Role / Timing Role: TLC7703IPWG4 monitors 5 V system rail and provides 4.2 ms reset pulse to ARM Cortex-A53 processor upon 2.63 V crossing. Use Value: Meets ISO 16750-2 Class D transient immunity requirements-no boot failures during engine cranking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | Fixed 3.3 V threshold; 350 nA quiescent current; 200 ms min delay (non-programmable); SOT-23-6 package | Lower power but longer fixed delay; lacks CONTROL pin for SRAM power-down mode | Select when ultra-low current dominates over delay flexibility and memory control features |
| MAX6326UT26D3+T | 2.63 V threshold; 1.6 µA quiescent current; 140 ms min delay; SC70-5 package; no CT pin or CONTROL pin | Higher accuracy (±0.5%) but no programmable delay or SRAM support; limited temp range (–40°C to 125°C) | Select when precision threshold and minimal footprint outweigh need for delay tuning or memory interface |
Compared with TLC7703IPWG4, TPS3808G33DBVR offers 20× lower supply current but sacrifices delay configurability and SRAM control; MAX6326UT26D3+T provides tighter threshold tolerance but removes both key flexibility features-making TLC7703IPWG4 uniquely suited for cost-sensitive, battery-backed systems needing adaptive reset timing and memory coordination.
Availability
TLC7703IPWG4 is available at Aetrix Electronics and suitable for medical imaging equipment, industrial PLC modules, battery-backed data loggers, and automotive infotainment head units requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for TLC7703IPWG4 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 safety-critical and battery-constrained systems-prioritizing low IDD, guaranteed reset at low VDD, and flexible interface options like CONTROL and CT pins.
FAQ
What is the exact threshold voltage of the TLC7703IPWG4, and how stable is it over temperature?
The TLC7703IPWG4 has a fixed negative-going input threshold voltage of 2.63 V, with ±70 mV hysteresis to prevent oscillation near trip point. Per TI SLVS087M datasheet, this threshold is temperature-compensated and remains within 2.56 V to 2.70 V across the full –40°C to 85°C operating range. The internal reference ensures stability without external trimming components, making TLC7703IPWG4 suitable for unattended deployments in variable-temperature environments.
Can the TLC7703IPWG4 be used with a 1.8 V supply rail?
No-the TLC7703IPWG4 requires a minimum VDD of 2 V per its recommended operating conditions. At 1.8 V, the internal circuitry may not function reliably: the power-up reset will not assert (as Vres = 1 V only applies when VDD ≥2 V), and comparator performance-including threshold accuracy and output drive-is not characterized. For 1.8 V systems, consider TI's TPS3808G18 or similar low-voltage supervisors explicitly rated down to 1.6 V.
How do I calculate the reset delay time for a given capacitor value on the CT pin of the TLC7703IPWG4?
Use the formula td = 2.1 × 10⁴ × CT, where CT is in farads and td is in seconds. For example, a 100 nF capacitor yields td = 2.1 × 10⁴ × 100 × 10⁻⁹ = 2.1 ms. TI specifies typical delay range of 1.1–4.2 ms with CT = 100 nF; actual values vary slightly with process and temperature. Always verify timing in final PCB layout using oscilloscope measurement at RESET pin under worst-case VDD and temperature.
Does the TLC7703IPWG4 support active-high RESET output, and how is it configured?
Yes-the TLC7703IPWG4 supports active-high RESET behavior via the CONTROL pin. When CONTROL is tied to GND, the RESET output becomes active-high (i.e., driven high during fault condition). This mode is explicitly intended for interfacing with static RAM chip-select lines during power failure. Leaving CONTROL open or pulling it high retains default active-low RESET operation. No external inverters or logic are needed.
Is the NC pin on the TLC7703IPWG4 safe to connect to ground or leave floating?
The NC (No Connect) pin on the TLC7703IPWG4 must remain unconnected-neither grounded nor tied to any signal or supply. TI documentation confirms this pin is internally unconnected; routing or soldering to it risks parasitic coupling, increased EMI susceptibility, or undefined behavior during transient events. PCB layout must omit any trace, pad, or via associated with the NC pin to ensure compliance with TI's DRB package specification.
TLC7703IPWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- 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-TSSOP
TLC7703IPWG4 FAQ
1.How can I place an order for TLC7703IPWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC7703IPWG4 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 TLC7703IPWG4 reliable?
The price and inventory of TLC7703IPWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC7703IPWG4 is usually 5 days.
3.What payment methods are accepted for TLC7703IPWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC7703IPWG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC7703IPWG4?
TLC7703IPWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC7703IPWG4 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 TLC7703IPWG4?
For technical support, including TLC7703IPWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC7703IPWG4 requirements.
6.How does Aetrix verify that TLC7703IPWG4 is sourced from the original manufacturer or authorized distributors?
All TLC7703IPWG4 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 TLC7703IPWG4 meets industry standards.
7.What is the process for return or replacement of TLC7703IPWG4?
All TLC7703IPWG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLC7703IPWG4, 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 TLC7703IPWG4 part is unused and in its original packaging.
Return procedure for TLC7703IPWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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