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Texas Instruments TLC7703IPW
- Part No.:
- TLC7703IPW
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC7703IPW.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,648
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Product details
Overview
TLC7703IPW from Texas Instruments is a micropower supply voltage supervisor IC with fixed 2.63 V sense 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 supervision, and power-down control for static RAM with battery backup-used in medical imaging systems and industrial microcontroller-based equipment.
For engineers reviewing the TLC7703IPW datasheet, TLC7703IPW pinout, TLC7703IPW application, or TLC7703IPW equivalent, this page delivers verified electrical parameters, TSSOP-8 package details, functional timing behavior, real-world use cases in power-fail retention and embedded reset management, and validated alternative parts for design continuity.
Technical Context
The TLC7703IPW integrates a precision temperature-compensated voltage reference and internal timer circuitry to generate a user-defined reset delay (td = 2.1 × 10⁴ × CT) after VDD stabilizes above 2 V. Its SENSE input monitors system rail voltage against a fixed 2.63 V threshold with 70 mV hysteresis to prevent chatter during brownout recovery.
It supports dual-mode reset assertion: active when VDD ≥ 1 V at power-up, and re-triggered when SENSE falls below threshold. The CONTROL pin enables active-high RESET output and coordinates chip-select disable for battery-backed SRAM during power loss-requiring separate battery-supplied VDD for that function.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sense Threshold Voltage | 2.63 V ±0.07 V - precise undervoltage detection point for 3.3 V systems with margin |
| Supply Voltage Range | 2 V to 6 V - supports single-cell Li-ion, 3.3 V, and 5 V logic rails without external regulation |
| Max Supply Current | 16 µA - enables multi-year battery life in always-on monitoring applications |
| Reset Delay Time | Programmable via external capacitor (e.g., 100 nF → 2.1 ms) - ensures reliable system initialization timing |
| Operating Temperature | –40°C to +85°C - qualified for commercial and industrial ambient environments |
| Output Drive Strength | ±2 mA - sufficient to directly drive microcontroller RESET pins and small logic loads |
| Power-Up Reset Voltage | 1 V - guarantees early assertion of RESET before core logic becomes operational |
Pinout & Package
TLC7703IPW 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 | Circuit Role | Design Meaning |
|---|---|---|
| 1 | SENSE | Voltage monitor input tied to regulated supply rail; triggers reset when <2.63 V |
| 2 | GND | Ground reference for all internal circuits and output drivers |
| 3 | RESET | Active-low open-drain reset output; requires external pull-up for logic-level compatibility |
| 4 | CONTROL | Input selecting RESET polarity: low = active-high RESET, high = active-low RESET |
| 5 | VDD | Primary power supply input (2–6 V); powers internal reference, timer, and outputs |
| 6 | RESIN | Manual reset input; low pulse forces immediate RESET assertion regardless of SENSE state |
| 7 | CT | Capacitor connection for programmable delay timing; sets td = 2.1 × 10⁴ × CT |
| 8 | RESET | Complementary active-high reset output; synchronized with RESET pin |
Key Features
| Feature | Design Value |
|---|---|
| Power-on reset generator | Asserts RESET at VDD ≥1 V - ensures deterministic startup before MCU clock stabilization |
| Automatic reset on voltage drop | Re-triggers RESET when SENSE falls below 2.63 V - prevents erratic operation during brownouts |
| Programmable delay time | External capacitor sets delay from ~1 ms to seconds - eliminates need for external timers or firmware delays |
| Defined RESET output down to VDD ≥1 V | Maintains valid logic levels even during deep brownout - critical for fail-safe shutdown sequencing |
| Power-down control for SRAM | Uses CONTROL + RESET to disable chip select during power loss - preserves data in battery-backed memory |
Applications
| Medical Imaging Power Sequencing | Industrial PLC Reset Management |
|---|---|
|
Use Scenario: MRI and ultrasound systems require sequenced power-up of analog front-end, FPGA, and processor subsystems with guaranteed reset hold time. IC Role / Device Role: TLC7703IPW monitors main 3.3 V rail and asserts RESET until stable, then holds for programmable delay before release. Use Value: Eliminates risk of metastability or latch-up during partial power ramp by enforcing minimum reset duration independent of software. |
Use Scenario: Programmable logic controllers must recover cleanly after AC line interruption or brownout events. IC Role / Device Role: TLC7703IPW detects 3.3 V rail collapse and reasserts RESET for >2 ms, ensuring full FPGA and microcontroller reset. Use Value: Prevents corrupted I/O states or watchdog lockup by guaranteeing hardware-level reset initiation on every undervoltage event. |
| Battery-Backed Data Logger | Automotive Body Control Module |
|
Use Scenario: Remote environmental sensors log data to SRAM during mains failure, retaining contents via coin cell. IC Role / Device Role: TLC7703IPW uses CONTROL pin to enable active-high RESET and coordinate SRAM chip-select disable upon VDD drop. Use Value: Enables seamless transition to battery power without data loss-no firmware intervention required. |
Use Scenario: BCMs manage door locks, lighting, and CAN gateways powered from vehicle battery with wide voltage variation (9–16 V). IC Role / Device Role: TLC7703IPW supervises 5 V LDO output feeding MCU; senses undervoltage during cranking (≤9 V battery). Use Value: Maintains MCU reset during engine start while supporting fast recovery once voltage recovers-no false resets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC7703IPWR | Same die, tape-and-reel packaging (2000 pcs), identical electrical specs and pinout | No functional difference; selected for automated SMT assembly vs. tube-packaged TLC7703IPW | Choose TLC7703IPWR for high-volume production; TLC7703IPW for prototyping or low-volume builds |
| TPS3808G33DBVR | Fixed 3.3 V threshold, 350 nA quiescent current, 200 ms factory-fixed delay, SOT-23-6 | Lacks manual reset (RESIN), CONTROL pin, and programmable delay; smaller footprint but less flexible | Select when ultra-low power and compact size outweigh need for delay tuning or SRAM power-down control |
Compared with TLC7703IPW, TLC7703IPWR offers identical functionality in optimized packaging for volume manufacturing, while TPS3808G33DBVR trades configurability for lower IQ and smaller size-making it suitable only where fixed delay and no SRAM coordination are acceptable.
Availability
TLC7703IPW is available at Aetrix Electronics and suitable for medical imaging systems, industrial PLCs, and battery-backed data loggers requiring stable component supply with long-term lifecycle support.
Supply support for TLC7703IPW 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 and industrial-grade performance.
The TLC77xx family was designed specifically for micropower voltage supervision in microcomputer and microprocessor systems-emphasizing low IQ, precision thresholds, and robust reset timing under varying supply conditions.
FAQ
What is the exact sense threshold voltage of the TLC7703IPW?
The TLC7703IPW has a fixed negative-going input threshold voltage (VIT–) of 2.63 V, with a typical tolerance of ±0.07 V over the full operating temperature range (–40°C to +85°C). This value is factory-trimmed and does not require external resistor programming like the TLC7701.
Does the TLC7703IPW support active-high RESET output?
Yes, the TLC7703IPW supports active-high RESET output via the CONTROL pin: when CONTROL is driven low, the RESET pin becomes active-high while RESET remains active-low. This dual-output configuration enables direct interface with MCUs requiring either polarity reset signal.
How is the reset delay time set on the TLC7703IPW?
The reset delay time (td) on the TLC7703IPW is set by an external capacitor connected to the CT pin, using the formula td = 2.1 × 10⁴ × CT. For example, a 100 nF capacitor yields a typical delay of 2.1 ms. No external resistors or clock sources are required.
Can the TLC7703IPW be used to protect battery-backed SRAM during power loss?
Yes, the TLC7703IPW includes dedicated logic for SRAM power-down control: when CONTROL is grounded and VDD drops, RESET goes active-high to disable the memory's chip select (CS), preserving data integrity. This function requires VDD to be supplied from the backup battery during main power loss.
What is the maximum supply current consumption of the TLC7703IPW?
The TLC7703IPW draws a maximum supply current (IDD) of 16 µA under normal operation (VDD = 5 V, outputs open), and up to 150 µA during the reset delay period (IDD(d)) when the internal timer is active-enabling multi-year operation from small coin cells.
TLC7703IPW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- 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
TLC7703IPW FAQ
1.How can I place an order for TLC7703IPW through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC7703IPW 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 TLC7703IPW reliable?
The price and inventory of TLC7703IPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC7703IPW is usually 5 days.
3.What payment methods are accepted for TLC7703IPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC7703IPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC7703IPW?
TLC7703IPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC7703IPW 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 TLC7703IPW?
For technical support, including TLC7703IPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC7703IPW requirements.
6.How does Aetrix verify that TLC7703IPW is sourced from the original manufacturer or authorized distributors?
All TLC7703IPW 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 TLC7703IPW meets industry standards.
7.What is the process for return or replacement of TLC7703IPW?
All TLC7703IPW units undergo pre-shipment inspection (PSI). If there is an issue with TLC7703IPW, 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 TLC7703IPW part is unused and in its original packaging.
Return procedure for TLC7703IPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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