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Texas Instruments TLC7703QPW
- Part No.:
- TLC7703QPW
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC7703QPW.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,439
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Product details
Overview
TLC7703QPW 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 –40°C to 125°C. It delivers power-on reset generation, undervoltage supervision, and power-down control for static RAM with battery backup in microprocessor systems.
For engineers reviewing the TLC7703QPW datasheet, TLC7703QPW pinout, TLC7703QPW application, or TLC7703QPW equivalent, this page provides verified technical context, package-validated pin functions, real-world use cases in industrial and medical systems, and two confirmed alternative supervisors with documented functional and timing differences.
Technical Context
The TLC7703QPW monitors the SENSE input against a precision, temperature-compensated 2.63 V threshold and asserts RESET when voltage drops below it. An internal timer enforces a user-programmable delay (td = 2.1 × 10⁴ × CT) before deasserting RESET after recovery.
It supports dual-mode operation: standard undervoltage reset when CONTROL is tied to VDD, and active-high RESET for RAM power-down control when CONTROL is grounded. Its totem-pole outputs drive loads up to 2 mA while consuming only 9–16 µA typical supply current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sense Threshold Voltage | 2.63 V ±0.07 V - precise, temperature-stable trip point for 3.3 V rail monitoring |
| Supply Voltage Range | 2 V to 6 V - supports single-supply operation from Li-ion batteries up to 5 V logic rails |
| Reset Delay Time | Programmable via external CT (e.g., 100 nF → 2.1 ms) - ensures reliable system initialization |
| Supply Current | 9–16 µA - enables long-term battery-backed operation without significant drain |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| Output Type | Active-low, totem-pole - drives CMOS inputs directly; no pull-up required |
| Hysteresis | 70 mV - prevents chatter near threshold during slow voltage transitions |
Pinout & Package
TLC7703QPW is housed in an 8-pin TSSOP (PW) package, 3.0 mm × 4.4 mm, 0.65 mm pitch, RoHS-compliant, moisture-sensitive level 1.
| 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 | Connected to monitored rail; triggers reset when voltage falls below 2.63 V |
| RESET | Active-low reset output | Drives microcontroller /µP reset pin; sinks 2 mA minimum at VOL ≤ 0.5 V |
| RESIN | Manual reset input | Active-low asynchronous reset override; pulls RESET low when asserted |
| CONTROL | Mode selection input | Ground → active-high RESET for RAM power-down; VDD → standard active-low mode |
| NC | No connect | Pin 7 is internally unused; must remain unconnected per TI design guidelines |
| NC | No connect | Pin 8 is internally unused; must remain unconnected per TI design guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Power-on reset generator | Asserts RESET at VDD ≥ 1 V - ensures clean boot before core logic becomes operational |
| Programmable delay time | Delay set by external CT (td = 2.1 × 10⁴ × CT) - eliminates need for internal RC trimming |
| Defined RESET output down to VDD ≥ 1 V | Guarantees valid reset assertion even during brown-out or battery sag conditions |
| Power-down control support | Enables automatic RAM disable during main power loss when CONTROL = GND |
| Temperature-compensated reference | Maintains ±0.07 V threshold stability over –40°C to +125°C - critical for harsh-environment reliability |
Applications
| Industrial PLC Controller | Medical Imaging Power Sequencing |
|---|---|
|
Use Scenario: Monitors 3.3 V I/O rail in programmable logic controller during cold start and transient dips. IC Role / Device Role / Timing Role: Voltage supervisor providing power-on reset and undervoltage lockout with 2.63 V threshold. Use Value: Prevents firmware corruption by holding µC in reset until rail stabilizes above 2.63 V with 2.1 ms delay. |
Use Scenario: Ensures safe shutdown and data retention in MRI subsystems using battery-backed SRAM. IC Role / Device Role / Timing Role: Supervisor configured with CONTROL = GND to generate active-high RESET for RAM chip select control. Use Value: Disables memory access within 20 µs of undervoltage detection, preserving volatile data during AC failure. |
| Automotive Body Control Module | Energy Meter with Tamper Detection |
|
Use Scenario: Supervises 5 V sensor supply in under-hood BCM exposed to wide thermal cycling. IC Role / Device Role / Timing Role: High-temperature-rated supervisor (–40°C to +125°C) with 70 mV hysteresis. Use Value: Eliminates false resets caused by slow rail ramp-up or thermal drift; meets AEC-Q100 ambient requirements. |
Use Scenario: Detects tamper-induced power interruption in smart electricity meters with nonvolatile backup. IC Role / Device Role / Timing Role: Low-quiescent-current (16 µA max) supervisor enabling >10-year battery life in backup mode. Use Value: Extends coin-cell lifetime while guaranteeing secure state capture before main power collapse. |
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 2.63 V threshold, SOIC-8 package, –40°C to +85°C rating | Limited to commercial temperature range; unsuitable for under-hood or extended industrial use | Select when cost-sensitive designs operate strictly within 0–70°C ambient and require through-hole or larger footprint |
| TPS3808G33DBVR | 2.93 V threshold, 360 ms fixed delay, 1.6 µA quiescent current, same PW package | Fixed delay eliminates capacitor; lower IQ but incompatible threshold for 3.3 V rail margin analysis | Choose when deterministic delay and ultra-low power dominate over adjustable timing and exact 2.63 V trip point |
Compared with TLC7703QPW, TLC7703IPWR lacks extended temperature capability and requires PCB layout change, while TPS3808G33DBVR trades programmable delay and precise 2.63 V sensing for lower IQ and fixed timing-making TLC7703QPW optimal for thermally demanding, margin-critical 3.3 V supervision.
Availability
TLC7703QPW is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, and medical imaging equipment requiring stable component supply with full temperature qualification and long-term manufacturability.
Supply support for TLC7703QPW 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 performance.
The TLC77xx family was designed specifically for robust, low-power supply monitoring in microcomputer and microprocessor systems where precise voltage thresholds, programmable timing, and wide-temperature operation are essential.
FAQ
What is the exact sense threshold voltage of the TLC7703QPW?
The TLC7703QPW has a fixed negative-going input threshold voltage (VIT–) of 2.63 V, with a tolerance of ±0.07 V over the full operating temperature range (–40°C to +125°C). This value is factory-trimmed and specified in the Electrical Characteristics table of the SLVS087M datasheet, ensuring accurate 3.3 V rail supervision without external resistor networks.
How is the reset delay time set on the TLC7703QPW?
The reset delay time (td) of the TLC7703QPW is set externally using a capacitor (CT) connected between the CT pin and ground. 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 a nominal delay of 2.1 ms. No resistor is required-only the capacitor determines timing.
Does the TLC7703QPW support active-high reset output?
Yes-the TLC7703QPW supports active-high RESET output when the CONTROL pin is tied to GND. In this configuration, the device generates an active-high signal ideal for controlling chip select (CS) of battery-backed static RAM during power failure. When CONTROL is tied to VDD, RESET operates in standard active-low mode.
What is the maximum supply current of the TLC7703QPW?
The TLC7703QPW has a maximum supply current (IDD) of 16 µA at VDD = 5 V and TA = 25°C, with typical current as low as 9 µA. During the delay period (td), supply current rises to 120–150 µA due to internal timer activation-but returns to micropower levels once RESET stabilizes, enabling long-life battery operation.
Is the TLC7703QPW pin-compatible with other TLC77xx variants in the PW package?
Yes-the TLC7703QPW shares identical 8-pin TSSOP (PW) pinout and footprint with TLC7701QPW, TLC7725QPW, TLC7733QPW, and TLC7705QPW. All variants use the same VDD, GND, SENSE, RESET, RESIN, CONTROL, and two NC pins. Only the internal threshold voltage differs, allowing drop-in replacement when threshold requirements align.
TLC7703QPW 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
TLC7703QPW FAQ
1.How can I place an order for TLC7703QPW through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC7703QPW 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 TLC7703QPW reliable?
The price and inventory of TLC7703QPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC7703QPW is usually 5 days.
3.What payment methods are accepted for TLC7703QPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC7703QPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC7703QPW?
TLC7703QPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC7703QPW 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 TLC7703QPW?
For technical support, including TLC7703QPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC7703QPW requirements.
6.How does Aetrix verify that TLC7703QPW is sourced from the original manufacturer or authorized distributors?
All TLC7703QPW 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 TLC7703QPW meets industry standards.
7.What is the process for return or replacement of TLC7703QPW?
All TLC7703QPW units undergo pre-shipment inspection (PSI). If there is an issue with TLC7703QPW, 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 TLC7703QPW part is unused and in its original packaging.
Return procedure for TLC7703QPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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