My Inquiry
My Account
Texas Instruments TLC7703QDG4
- Part No.:
- TLC7703QDG4
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC7703QDG4.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,636
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TLC7703QDG4 from Texas Instruments is a micropower supply voltage supervisor IC designed for reset control in microcomputer and microprocessor systems. It features a fixed 2.63 V negative-going input threshold voltage (VIT–), programmable delay time via external capacitor (td = 2.1 × 10⁴ × CT), and operates across –40°C to 125°C. Its defined RESET output from VDD ≥1 V and 16 µA max supply current support reliable power-on and undervoltage supervision in industrial control units.
For engineers reviewing the TLC7703QDG4 datasheet, TLC7703QDG4 pinout, TLC7703QDG4 application, or TLC7703QDG4 equivalent, key selection criteria include its SOIC-8 package, 2.63 V precision voltage sensing, active-low RESET with totem-pole output, temperature-compensated reference, and compatibility with static RAM power-down control in battery-backed systems.
Technical Context
The TLC7703QDG4 implements a precision voltage monitor with hysteresis (70 mV) and an internal timer that delays RESET deassertion after SENSE voltage recovers above threshold. Its CONTROL pin enables active-high RESET configuration when tied to GND, supporting memory chip-select disable during power failure.
It integrates a temperature-compensated bandgap reference and power-on reset generator that asserts RESET at VDD ≥1 V. The device supports supply voltages from 2 V to 6 V and maintains defined logic levels (VOH ≥3.7 V at VDD = 4.5 V, VOL ≤0.5 V at IOL = 2 mA) across its full operating temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 2.63 V (fixed negative-going SENSE threshold; ensures stable reset activation at precise supply rail level) |
| Supply Voltage Range | 2 V to 6 V (supports wide-input industrial and automotive subsystems without external regulation) |
| Max Supply Current | 16 µA (enables ultra-low-power operation in battery-critical applications like medical data loggers) |
| Operating Temperature | –40°C to 125°C (Q-grade qualification for under-hood and industrial motor drive environments) |
| Delay Time Formula | td = 2.1 × 10⁴ × CT (allows user-defined reset hold time from ~1.1 ms to seconds using standard ceramic capacitors) |
| Hysteresis | 70 mV (prevents oscillatory reset assertion near threshold during noisy or slowly recovering supplies) |
| Reset Output Type | Active-low, totem-pole (drives CMOS inputs directly; no pull-up required; supports 2 mA sink capability) |
Pinout & Package
Package: SOIC-8 (D package), 3.91 mm × 4.9 mm body, 1.27 mm pitch, plastic, RoHS-compliant, MSL Level-1.
| 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 | Power supply input | Primary supply rail (2–6 V); powers internal reference, comparator, and output stage |
| SENSE | Voltage monitoring input | Connects to monitored rail (e.g., microcontroller VCC); triggers reset when voltage falls below 2.63 V |
| CONTROL | Reset polarity control | When tied to GND, configures RESET as active-high; when open or high, RESET is active-low |
| RESIN | Manual reset input | Active-low asynchronous reset override; forces RESET assertion regardless of SENSE state |
| RESET | Reset output | Active-low totem-pole output; drives microcontroller /RESET pin directly; sinks up to 2 mA |
| NC | No connect | Pin 1 is unconnected; must remain floating or grounded per layout guidelines to avoid noise coupling |
| NC | No connect | Pin 2 is unconnected; no internal connection; leave unpopulated or grounded per PCB design rules |
Key Features
| Feature | Design Value |
|---|---|
| Power-on reset generation | Asserts RESET at VDD ≥1 V - ensures microcontroller remains held in reset until minimum functional supply is established |
| Programmable delay time | External capacitor sets td from milliseconds to seconds - eliminates need for discrete RC timing networks or firmware delays |
| Temperature-compensated reference | Stable 2.63 V threshold over –40°C to 125°C - avoids false resets due to thermal drift in harsh environments |
| Power-down control support | Enables automatic disabling of static RAM during brownout - preserves data integrity in battery-backed memory systems |
| Micropower operation | 16 µA max IDD - extends battery life in portable instrumentation and remote sensors without sacrificing supervision accuracy |
Applications
| Industrial PLC Controller | Automotive Engine Control Unit |
|---|---|
|
Use Scenario: Monitors 5 V main supply rail during cold cranking and load dump events. IC Role / Device Role / Timing Role: Voltage supervisor providing power-on reset and undervoltage lockout with 2.63 V threshold and 70 mV hysteresis. Use Value: Prevents ECU firmware execution during unstable supply conditions; ensures deterministic boot sequence after voltage recovery. |
Use Scenario: Supervises 3.3 V microcontroller supply in engine bay electronics exposed to extreme temperature cycling. IC Role / Device Role / Timing Role: Q-grade supervisor asserting active-low RESET with programmable delay to accommodate slow rail ramp-up. Use Value: Guarantees MCU remains held until supply stabilizes above 2.63 V and sustains for ≥1.1 ms, eliminating boot failures. |
| Medical Data Logger | Battery-Backed Industrial Memory Module |
|
Use Scenario: Powers from coin cell + boost converter; requires ultra-low quiescent current to maximize runtime. IC Role / Device Role / Timing Role: Micropower supervisor (16 µA IDD) monitoring regulated 3.3 V rail with manual reset via pushbutton (RESIN). Use Value: Enables >1-year battery life while maintaining reliable reset assertion during voltage sags caused by sensor bursts. |
Use Scenario: Protects SRAM contents during AC mains failure using backup battery and controlled power-down sequence. IC Role / Device Role / Timing Role: Supervisor driving RAM chip select (CS) via RESET output while CONTROL pin ties to processor bank select signal. Use Value: Automatically disables memory access before VDD drops below safe write level, preventing data corruption. |
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; open-drain RESET; requires external pull-up | Lower power but lacks totem-pole output and power-down control logic | Preferred where ultra-low IQ dominates and reset polarity/active drive is not critical |
| MAX6326UT26D3+T | 2.63 V threshold; 1.6 µA IQ; push-button reset input; no CONTROL pin for polarity selection | Higher accuracy (±0.5% threshold) but no integrated power-down control for SRAM | Selected when precision threshold tolerance and manual reset are prioritized over memory interface features |
Compared with TPS3808G33DBVR and MAX6326UT26D3+T, the TLC7703QDG4 uniquely combines Q-grade temperature range, totem-pole RESET output, and dedicated CONTROL pin for SRAM power-down sequencing - making it optimal for industrial microcontroller systems requiring robust, feature-rich supervision without external components.
Availability
TLC7703QDG4 is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive engine management systems, and battery-backed memory modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLC7703QDG4 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 company delivering analog and embedded processing solutions, with leadership in power management, signal chain, and microcontrollers.
The TLC77xx family was designed specifically for micropower voltage supervision in microcomputer systems - emphasizing precision threshold stability, programmable timing, and integrated power-down control for battery-backed memory.
FAQ
What is the exact threshold voltage of the TLC7703QDG4 and how is it specified?
The TLC7703QDG4 has a fixed negative-going input threshold voltage (VIT–) of 2.63 V, with a typical tolerance of ±0.07 V (2.56 V to 2.70 V) over its full operating temperature range of –40°C to 125°C. This value is factory-trimmed and temperature-compensated using an internal bandgap reference, ensuring consistent reset behavior across voltage and thermal conditions without external resistor networks.
Does the TLC7703QDG4 support active-high RESET output?
Yes, the TLC7703QDG4 supports active-high RESET output via its CONTROL pin: when CONTROL is tied to GND, the RESET output becomes active-high. When CONTROL is left open or pulled high, RESET operates as active-low. This dual-mode flexibility allows direct interface with microcontrollers requiring either polarity without external inverters.
How is the reset delay time set on the TLC7703QDG4?
The reset delay time (td) on the TLC7703QDG4 is set externally using a capacitor (CT) connected between the CT pin and GND. 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 ~2.1 ms delay. No resistor is required - only a stable ceramic capacitor is needed.
What is the maximum supply current of the TLC7703QDG4 and under what conditions is it measured?
The maximum supply current (IDD) of the TLC7703QDG4 is 16 µA, measured under recommended operating conditions: VDD = 5 V, RESIN = VDD, SENSE = VDD ≥ VITmax + 0.2 V, CONTROL = 0 V, and outputs open. This ultra-low quiescent current enables use in always-on, battery-powered systems such as portable diagnostics and remote sensors.
Can the TLC7703QDG4 be used to protect static RAM during power loss?
Yes, the TLC7703QDG4 includes dedicated power-down control logic for static RAM with battery backup. By connecting the RESET output to the RAM's chip select (CS) and the CONTROL pin to the microprocessor's memory bank select signal (e.g., CSH1), the device automatically disables RAM access during power failure - preserving data integrity without firmware intervention.
TLC7703QDG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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-SOIC
TLC7703QDG4 FAQ
1.How can I place an order for TLC7703QDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC7703QDG4 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 TLC7703QDG4 reliable?
The price and inventory of TLC7703QDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC7703QDG4 is usually 5 days.
3.What payment methods are accepted for TLC7703QDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC7703QDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC7703QDG4?
TLC7703QDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC7703QDG4 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 TLC7703QDG4?
For technical support, including TLC7703QDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC7703QDG4 requirements.
6.How does Aetrix verify that TLC7703QDG4 is sourced from the original manufacturer or authorized distributors?
All TLC7703QDG4 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 TLC7703QDG4 meets industry standards.
7.What is the process for return or replacement of TLC7703QDG4?
All TLC7703QDG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLC7703QDG4, 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 TLC7703QDG4 part is unused and in its original packaging.
Return procedure for TLC7703QDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC7703QDG4 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…
