My Inquiry
My Account
Texas Instruments TLC7703QP
- Part No.:
- TLC7703QP
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TLC7703QP.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,795
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TLC7703QP from Texas Instruments is a micropower supply voltage supervisor IC with fixed 2.63 V sense threshold, operating across –40°C to 125°C, supporting power-on reset, undervoltage detection, and programmable delay via external capacitor (td = 2.1 × 10⁴ × CT), designed for microcomputer/microprocessor system reset control in industrial and automotive environments.
For engineers reviewing the TLC7703QP datasheet, TLC7703QP pinout, TLC7703QP application, or TLC7703QP equivalent, this page delivers verified electrical specs, DRB-8 package terminal mapping, real-world use cases in power-fail memory retention and medical imaging systems, and validated alternative options for design continuity.
Technical Context
The TLC7703QP integrates a precision temperature-compensated voltage reference, internal timer-based delay circuitry, and dual-output totem-pole logic (RESET and RESET) with defined output behavior down to VDD ≥ 1 V. It monitors SENSE voltage against a fixed 2.63 V threshold and asserts reset when VI(SENSE) falls below VIT–, maintaining active state until both threshold recovery and delay expiration occur.
Its CONTROL input enables power-down mode for static RAM with battery backup: tying CONTROL to GND configures RESET as active-high, allowing automatic chip-select disable during brownout. The device draws only 9–16 µA quiescent current and supports supply voltages from 2 V to 6 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - operates across wide input range, enabling compatibility with 3.3 V and 5 V systems without level-shifting. |
| Sense Threshold Voltage | 2.63 V (typical), ±70 mV hysteresis - precise undervoltage detection point for 3.3 V rail monitoring with noise immunity. |
| Reset Delay Time | Programmable via external capacitor: td = 2.1 × 10⁴ × CT - allows adjustable reset hold time (e.g., 2.1 ms with 100 nF). |
| Supply Current | 9–16 µA (IDD) - ultra-low power consumption critical for battery-backed or energy-sensitive applications. |
| Operating Temperature | –40°C to +125°C - qualified for extended industrial and under-hood automotive environments. |
| Output Drive | ±2 mA (IOL/IOH), totem-pole - sufficient to directly drive microcontroller reset inputs or small logic loads without buffering. |
| Power-Up Reset Voltage | 1 V - ensures reliable assertion of RESET during ramp-up, even before full VDD stabilization. |
Pinout & Package
Package: 3 mm × 3 mm, 8-pin SON (DRB) - thermally enhanced, leadless, RoHS-compliant surface-mount package with exposed thermal pad; suitable for high-density PCB layouts and medical imaging applications requiring non-magnetic construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply input | Primary power connection; device functions from 2 V to 6 V, with RESET defined down to 1 V. |
| GND | Ground reference | Return path for all internal circuits and outputs; must be low-impedance for stable threshold operation. |
| SENSE | Voltage monitor input | Connects to monitored rail (e.g., 3.3 V); triggers reset when voltage drops below 2.63 V threshold. |
| CONTROL | Mode selection input | Low = active-high RESET (for RAM power-down); high = standard active-low RESET behavior. |
| RESIN | Manual reset input | Active-low asynchronous reset override; pulls RESET low when asserted regardless of SENSE state. |
| RESET | Active-low reset output | Open-drain compatible totem-pole output; drives microcontroller /RESET pin low during fault condition. |
| RESET | Active-high reset output | Complementary to RESET; used for direct interface with logic requiring high-active reset signals. |
| NC | No connect | Unbonded pin; must remain unconnected per TI DRB-8 mechanical drawing and functional specification. |
Key Features
| Feature | Design Value |
|---|---|
| Power-on reset generator | Guarantees valid reset assertion at VDD ≥ 1 V, eliminating need for external RC timing networks during startup. |
| Automatic reset after voltage drop | Detects undervoltage events on SENSE rail and holds RESET active until both threshold recovery and programmable delay expire. |
| Temperature-compensated reference | Maintains stable 2.63 V threshold across –40°C to +125°C, minimizing drift-induced false resets in harsh environments. |
| Static RAM power-down support | CONTROL pin enables seamless integration with battery-backed SRAM by disabling CS during brownout without MCU intervention. |
| Micropower operation | Max 16 µA supply current enables use in always-on, low-power subsystems such as sensor nodes or safety monitors. |
Applications
| Medical Imaging Power Monitoring | Automotive Engine Control Unit (ECU) |
|---|---|
|
Use Scenario: Ensuring clean power sequencing and brownout recovery in MRI or ultrasound front-end analog signal chains. IC Role / Device Role / Timing Role: Supervises 3.3 V analog supply rail; asserts RESET if voltage dips below 2.63 V during transient load switching or EMI events. Use Value: Prevents corrupted image data acquisition by guaranteeing processor reset before analog-to-digital conversion resumes post-fault. |
Use Scenario: Managing safe boot and fail-safe shutdown in engine control modules exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Monitors main 5 V microcontroller supply; generates programmable reset pulse (via 100 nF CT) to meet ISO 16750-2 cold-crank timing requirements. Use Value: Enables deterministic restart after battery voltage sag, avoiding undefined MCU states that could compromise emissions or drivability. |
| Industrial PLC I/O Module | Battery-Backed Data Logger |
|
Use Scenario: Providing robust reset signaling in programmable logic controller modules operating in factory-floor environments with noisy 24 V DC supplies. IC Role / Device Role / Timing Role: Supervises isolated 3.3 V digital rail derived from switch-mode converter; uses RESIN for manual watchdog-triggered reset. Use Value: Eliminates need for discrete reset ICs and RC networks, reducing BOM count while meeting IEC 61000-4-4 EFT immunity requirements. |
Use Scenario: Preserving SRAM contents during AC power loss in environmental monitoring loggers powered by Li-ion + backup supercapacitor. IC Role / Device Role / Timing Role: Uses CONTROL = GND to configure RESET as active-high, driving SRAM CS low to halt writes and retain data during brownout. Use Value: Extends effective battery life by >30% versus comparator-based solutions due to 16 µA quiescent current and integrated delay logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC7703QD | Same 2.63 V threshold, SOIC-8 package (4.9 mm × 3.9 mm), higher thermal resistance (5.8 mW/°C derating vs DRB's 11.0 mW/°C). | Preferred where board space permits larger footprint and hand-soldering is required; lacks DRB's non-magnetic suitability for MRI. | Select TLC7703QD only if legacy SOIC layout exists; TLC7703QP offers superior thermal performance and smaller area. |
| TPS3808G33 | Fixed 3.3 V threshold, 1.6 µA max IDD, 200 ms factory-fixed delay, no CONTROL pin or RESET complement. | Designed for simpler 3.3 V rail supervision without RAM power-down logic; lacks dual-output flexibility and programmable timing. | Choose TPS3808G33 only when fixed delay and minimal quiescent current outweigh need for configurability and dual outputs. |
Compared with TLC7703QD, TLC7703QP delivers 2× better thermal dissipation and 30% smaller PCB area; versus TPS3808G33, it provides programmable delay, dual active-high/low outputs, and dedicated RAM power-down control-critical for deterministic data retention.
Availability
TLC7703QP is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical imaging systems requiring stable component supply, long-term lifecycle support, and guaranteed non-magnetic packaging compliance.
Supply support for TLC7703QP 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 technologies with over 90 years of innovation in industrial, automotive, and medical electronics.
The TLC77xx family was engineered specifically for micropower voltage supervision in mission-critical embedded systems, emphasizing precision threshold stability, wide temperature operation, and integrated power-down control for battery-backed memory.
FAQ
What is the exact sense threshold voltage of the TLC7703QP?
The TLC7703QP has a fixed negative-going input threshold voltage (VIT–) of 2.63 V (typical), with a guaranteed range of 2.56 V to 2.70 V across its –40°C to +125°C operating temperature range. This value is factory-trimmed and does not require external resistor programming like the TLC7701.
How do I calculate the reset delay time for the TLC7703QP?
The reset delay time (td) for the TLC7703QP is calculated using td = 2.1 × 10⁴ × CT, where CT is the external capacitor value in farads. For example, a 100 nF capacitor yields td = 2.1 ms. This delay begins after SENSE voltage recovers above threshold and ensures stable system reset before release.
Does the TLC7703QP support active-high reset output?
Yes, the TLC7703QP provides both RESET (active-low) and RESET (active-high) complementary outputs. When CONTROL is tied to GND, RESET becomes active-high-enabling direct interface with logic or memory chips requiring high-asserted reset signals without external inverters.
What is the minimum supply voltage at which TLC7703QP asserts RESET during power-up?
The TLC7703QP asserts RESET during power-up when VDD reaches 1 V, as specified by the power-up reset voltage (Vres) parameter. This ensures early and reliable reset assertion before the microcontroller or FPGA reaches its operational voltage threshold.
Is the DRB package of the TLC7703QP suitable for medical imaging applications?
Yes-the DRB package used by the TLC7703QP is explicitly designated as a non-magnetic option for medical imaging applications per TI documentation. Its leadless, ceramic-based construction avoids ferromagnetic materials that could interfere with MRI magnetic fields.
TLC7703QP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
TLC7703QP FAQ
1.How can I place an order for TLC7703QP through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC7703QP 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 TLC7703QP reliable?
The price and inventory of TLC7703QP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC7703QP is usually 5 days.
3.What payment methods are accepted for TLC7703QP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC7703QP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC7703QP?
TLC7703QP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC7703QP 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 TLC7703QP?
For technical support, including TLC7703QP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC7703QP requirements.
6.How does Aetrix verify that TLC7703QP is sourced from the original manufacturer or authorized distributors?
All TLC7703QP 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 TLC7703QP meets industry standards.
7.What is the process for return or replacement of TLC7703QP?
All TLC7703QP units undergo pre-shipment inspection (PSI). If there is an issue with TLC7703QP, 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 TLC7703QP part is unused and in its original packaging.
Return procedure for TLC7703QP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC7703QP Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
