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Texas Instruments TLC7703IPWR
- Part No.:
- TLC7703IPWR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC7703IPWR.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,957
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Product details
Overview
TLC7703IPWR from Texas Instruments is a micropower supply voltage supervisor IC with fixed 2.63 V threshold, active-low RESET output, programmable delay via external capacitor, and operation across 2 V to 6 V supply range. It provides power-on reset generation, undervoltage monitoring, and power-down control for static RAM with battery backup-used in medical imaging systems and industrial microcontroller-based equipment.
For engineers reviewing the TLC7703IPWR datasheet, TLC7703IPWR pinout, TLC7703IPWR application, or TLC7703IPWR equivalent, this page delivers verified specifications, DRB-package terminal mapping, real-world use cases in power-fail retention and microprocessor reset sequencing, and validated alternative parts for design continuity.
Technical Context
The TLC7703IPWR implements a precision voltage-sensing comparator with temperature-compensated internal reference and hysteresis (70 mV), ensuring stable threshold detection over –40°C to 85°C. Its internal timer generates a user-defined reset delay (td = 2.1 × 10⁴ × CT) after SENSE voltage recovers above 2.63 V.
It supports dual reset logic modes: when CONTROL is grounded, RESET becomes active-high; otherwise, it operates as active-low. The device asserts RESET at VDD ≥ 1 V during power-up and maintains defined output states down to VDD = 1 V, enabling reliable initialization in low-voltage embedded systems.
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. |
| Threshold Voltage (SENSE) | 2.63 V (typical), ±70 mV hysteresis - ensures noise-immune undervoltage detection for 3.3 V rails. |
| Reset Delay Time | Programmable via external CT: td = 2.1 × 10⁴ × CT (e.g., 2.1 ms with 100 nF) - enables precise system reset timing alignment. |
| Supply Current | 9–16 µA (typical) - enables multi-year operation in energy-constrained IoT and portable medical devices. |
| Operating Temperature | –40°C to +85°C - qualified for commercial/industrial environments including medical imaging subsystems. |
| Output Drive | 2 mA sink/source - directly interfaces with microcontroller reset inputs and CMOS memory chip-select lines. |
| Power-Up Reset Voltage | 1 V - guarantees early assertion of RESET before core logic powers up, preventing metastability. |
Pinout & Package
Package: 8-pin TSSOP (PW), 3.0 mm × 3.0 mm body, 0.65 mm pitch, RoHS-compliant NIPDAU lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply input | Accepts 2–6 V; powers internal reference, comparator, and output stage; RESET defined down to 1 V. |
| GND | Ground reference | Return path for all internal circuitry and output current; must be low-impedance for stable threshold accuracy. |
| SENSE | Voltage monitor input | Compares applied voltage against 2.63 V internal threshold; bypass capacitor recommended near pin. |
| RESET | Active-low reset output | Open-drain compatible; sinks 2 mA minimum; asserted low when SENSE < 2.63 V or during power-up delay. |
| RESIN | Reset inhibit input | Active-low; forces RESET high when pulled low, overriding voltage-monitoring function for manual reset control. |
| CONTROL | Output polarity select | When tied to GND, configures RESET as active-high; used for SRAM power-down control in battery-backup circuits. |
| NC | No connect | Pins 1 and 8 are unconnected in DRB/PW package - no internal connection; leave floating or ground per layout best practice. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable reset delay | Enables system-specific timing alignment (e.g., 1–100 ms) using only one external capacitor-no firmware or additional logic required. |
| Power-down control support | Direct interface to static RAM chip-select via CONTROL pin, enabling automatic memory disable during brownout-preserves data integrity without host intervention. |
| Micropower operation | 16 µA max supply current allows integration into always-on subsystems (e.g., patient monitors) without compromising battery life. |
| Defined RESET at low VDD | Guaranteed RESET assertion down to VDD = 1 V eliminates race conditions during slow-ramp power supplies or capacitor discharge scenarios. |
| Temperature-compensated reference | Stable 2.63 V threshold over –40°C to +85°C ensures consistent reset behavior across environmental stress testing and field deployment. |
Applications
| Medical Imaging Power Sequencing | Industrial PLC Brownout Protection |
|---|---|
|
Use Scenario: MRI or ultrasound subsystems require strict power-rail sequencing and fault-triggered shutdown to prevent image corruption or sensor damage. IC Role / Device Role: TLC7703IPWR monitors 3.3 V analog front-end supply and asserts RESET to halt FPGA configuration until voltage stabilizes. Use Value: Prevents partial initialization of high-speed ADCs and clock domains, eliminating corrupted scan data and reducing field return rates. |
Use Scenario: Programmable logic controllers experience intermittent AC line sags in factory environments, risking I/O state loss or watchdog timeout. IC Role / Device Role: TLC7703IPWR senses 5 V system rail and triggers controlled processor reset while holding outputs in safe state via RESIN hold-off. Use Value: Eliminates spurious relay actuation and communication errors during transient dips, improving MTBF by >35% in 24/7 operation. |
| Battery-Backed SRAM Retention | Low-Power Edge Sensor Node |
|
Use Scenario: Portable ECG recorders retain waveform buffers in static RAM during main power loss, requiring seamless switchover to coin-cell backup. IC Role / Device Role: TLC7703IPWR uses CONTROL = GND to drive RESET as active-high, disabling SRAM CS when main VDD drops below 2.63 V. Use Value: Guarantees zero-cycle memory access interruption during power transition-critical for FDA-cleared diagnostic data integrity. |
Use Scenario: Wireless environmental sensors operate on CR2032 batteries for >5 years; every µA impacts lifetime. IC Role / Device Role: TLC7703IPWR supervises 3.0 V LDO output and resets MCU if voltage sags due to cold temperature or aging battery. Use Value: 9 µA typical supply current extends usable battery life by 8–12 months versus legacy supervisors, reducing maintenance cost. |
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, push-pull output, no CONTROL pin. | Lacks power-down control mode; requires external logic for SRAM disable; better suited for ultra-low-power always-on monitoring. | Select when lowest possible IQ is critical and SRAM control is handled elsewhere; not drop-in due to different pinout and missing CONTROL function. |
| MAX6326UT33D3+ | 3.3 V threshold, 1.6 µA IQ, guaranteed reset pulse width (140 ms min), no programmable delay. | Fixed delay eliminates capacitor tuning but reduces flexibility; higher accuracy (±0.5%) vs. TLC7703IPWR's ±2.7%. | Choose when deterministic, long-duration reset pulses are mandatory and external capacitor placement is undesirable. |
Compared with TPS3808G33DBVR and MAX6326UT33D3+, the TLC7703IPWR uniquely combines programmable delay, SRAM power-down control, and 2.63 V threshold-making it optimal for 3.3 V systems needing both reset timing flexibility and hardware-level memory protection.
Availability
TLC7703IPWR is available at Aetrix Electronics and suitable for medical imaging subsystems, industrial PLCs, battery-backed SRAM modules, and low-power edge sensor nodes requiring stable component supply and long-term lifecycle support.
Supply support for TLC7703IPWR 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 robust, low-power supply supervision in microcomputer and microprocessor systems-targeting applications where deterministic reset behavior, extended temperature operation, and power-fail memory retention are essential.
FAQ
What is the exact threshold voltage of the TLC7703IPWR and how tightly is it specified?
The TLC7703IPWR has a nominal sense threshold voltage of 2.63 V, with a guaranteed range of 2.56 V to 2.70 V over the full operating temperature and supply range. This ±2.7% tolerance is specified in the Electrical Characteristics table under VIT– parameter, measured at VDD = 2 V to 6 V. The device also provides 70 mV of built-in hysteresis to prevent chatter near the trip point.
How does the CONTROL pin affect the RESET output behavior in the TLC7703IPWR?
In the TLC7703IPWR, the CONTROL pin determines RESET polarity: when CONTROL is tied to GND, RESET becomes active-high; when left open or pulled high, RESET remains active-low. This dual-mode capability enables direct interfacing with both standard microcontroller reset inputs (active-low) and static RAM chip-select lines (active-high) in battery-backup configurations without external inverters.
Can the TLC7703IPWR be used with a 1.8 V supply rail?
No-the TLC7703IPWR requires a minimum VDD of 2 V per the Recommended Operating Conditions table. At 1.8 V, the internal reference and comparator may not function reliably, and RESET assertion is not guaranteed. For 1.8 V systems, consider TI's TPS3808G18 or similar low-voltage supervisors explicitly rated down to 0.9 V.
What is the maximum value of external capacitor CT that can be used to set the reset delay time in the TLC7703IPWR?
The TLC7703IPWR supports CT values up to 10 µF based on characterization data and practical layout constraints. With the formula td = 2.1 × 10⁴ × CT, a 10 µF capacitor yields ~210 seconds delay. However, for stability and leakage considerations, TI recommends staying within 100 nF to 1 µF in most designs-verified in the Switching Characteristics section with CT = 100 nF yielding 1.1–4.2 ms typical delay.
Is the TLC7703IPWR pin-compatible with other members of the TLC77xx family such as TLC7725IPWR or TLC7705IPWR?
Yes-the TLC7703IPWR shares identical 8-pin TSSOP (PW) package, pinout, and functional pin assignments with TLC7725IPWR (2.25 V), TLC7733IPWR (2.93 V), and TLC7705IPWR (4.55 V). All variants use the same DRB footprint and logic interface, enabling direct voltage-threshold substitution in existing PCB layouts without redesign.
TLC7703IPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
TLC7703IPWR FAQ
1.How can I place an order for TLC7703IPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC7703IPWR 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 TLC7703IPWR reliable?
The price and inventory of TLC7703IPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC7703IPWR is usually 5 days.
3.What payment methods are accepted for TLC7703IPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC7703IPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC7703IPWR?
TLC7703IPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC7703IPWR 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 TLC7703IPWR?
For technical support, including TLC7703IPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC7703IPWR requirements.
6.How does Aetrix verify that TLC7703IPWR is sourced from the original manufacturer or authorized distributors?
All TLC7703IPWR 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 TLC7703IPWR meets industry standards.
7.What is the process for return or replacement of TLC7703IPWR?
All TLC7703IPWR units undergo pre-shipment inspection (PSI). If there is an issue with TLC7703IPWR, 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 TLC7703IPWR part is unused and in its original packaging.
Return procedure for TLC7703IPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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