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Texas Instruments TLC7733QD
- Part No.:
- TLC7733QD
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC7733QD.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:916
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Product details
Overview
TLC7733QD from Texas Instruments is a micropower supply voltage supervisor IC with fixed 2.93 V sense threshold, –40°C to 125°C operating range, 16 µA max supply current, programmable reset delay via external capacitor, and totem-pole RESET/RESET outputs-used for reliable power-on and undervoltage reset control in automotive engine control units.
For engineers reviewing the TLC7733QD datasheet, TLC7733QD pinout, TLC7733QD application, or TLC7733QD equivalent, this page delivers verified electrical specs, DRB package terminal mapping, medical-grade non-magnetic variant availability, and direct alternatives for industrial-grade voltage monitoring designs requiring extended temperature operation.
Technical Context
The TLC7733QD implements a precision bandgap-based voltage reference with temperature compensation to maintain ±1.5% threshold accuracy across –40°C to 125°C. It features dual active-high and active-low reset outputs with 70 mV hysteresis on the SENSE input to prevent chatter during brownout recovery.
Its internal power-on reset generator asserts RESET when VDD rises above 1 V, then transitions to undervoltage supervision once VDD ≥2 V. Delay time (td = 2.1×10⁴ × CT) is externally set via capacitor on the CT pin, enabling configurable reset hold times from 1.1 ms to 4.2 ms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sense Threshold Voltage | 2.93 V nominal; ensures reliable detection of 3.3 V rail collapse with ±1.5% tolerance over full temperature range. |
| Supply Voltage Range | 2 V to 6 V; supports direct interface with 2.5 V, 3.3 V, and 5 V logic domains without level shifting. |
| Max Supply Current | 16 µA at 5 V; enables battery-backed systems to sustain >10-year shelf life in low-power sleep modes. |
| Reset Delay Time | 1.1–4.2 ms (typical); set by external CT capacitor (e.g., 100 nF yields ~2.1 ms), ensuring sufficient system stabilization before release. |
| Operating Temperature | –40°C to 125°C; qualified for under-hood automotive applications and industrial motor drive controllers. |
| Output Drive Strength | ±2 mA at VOH/VOL; drives standard CMOS inputs directly and supports wired-OR reset bus configurations. |
| Hysteresis Voltage | 70 mV; prevents oscillation during slow-rising/falling supply rails near threshold crossing. |
Pinout & Package
Package: 8-pin SON (DRB), 3 mm × 3 mm, 0.5 mm pitch, non-magnetic variant available for MRI-compatible medical imaging systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Return path for all internal circuitry; must be connected to system ground plane with low-inductance trace. |
| VDD | Power supply input | Accepts 2–6 V; bypass capacitor (0.1 µF ceramic) required near pin for stable threshold reference. |
| SENSE | Voltage monitor input | Monitors regulated rail; asserts reset when voltage drops below 2.93 V (with 70 mV hysteresis). |
| CONTROL | Mode select input | Drives RESET high when tied to GND; enables battery-backed SRAM power-down control in loss-of-main scenarios. |
| RESIN | Manual reset input | Active-low asynchronous reset trigger; pulls RESET low when driven <0.2×VDD. |
| CT | Capacitor timing terminal | Connects external capacitor to set reset delay time (td = 2.1×10⁴ × CT); no pull-up/down required. |
| RESET | Active-low reset output | Open-drain compatible; sinks 2 mA minimum; used for microcontroller /RESET assertion. |
| RESET | Active-high reset output | Push-pull totem-pole; sources/sinks 2 mA; directly interfaces with FPGA or ASIC reset inputs. |
Key Features
| Feature | Design Value |
|---|---|
| Power-on reset generation | Asserts RESET at VDD ≥1 V-ensures microcontrollers initialize before core logic becomes functional. |
| Programmable delay timer | External capacitor sets precise reset hold time (1.1–4.2 ms), eliminating need for RC timing networks or firmware delays. |
| Battery backup support | CONTROL pin enables automatic SRAM chip-select disable during main power failure-preserves data integrity without host intervention. |
| Temperature-compensated reference | Maintains ±1.5% threshold accuracy from –40°C to 125°C-critical for engine control and industrial PLC reliability. |
| Micropower operation | 16 µA max IDD allows integration into always-on subsystems (e.g., CAN wake-up monitors) without compromising battery life. |
Applications
| Engine Control Unit (ECU) | Industrial Programmable Logic Controller (PLC) |
|---|---|
|
Use Scenario: Monitors 5 V microcontroller supply rail during cold cranking, where battery voltage dips to 6–9 V causing regulator dropout. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET until 5 V rail stabilizes above 2.93 V and holds for 2.1 ms. Use Value: Prevents ECU firmware corruption by blocking processor execution until power is fully regulated and clocks are stable. |
Use Scenario: Supervises 3.3 V I/O supply in modular PLC backplane, where hot-swap insertion causes transient undervoltage. IC Role / Device Role / Timing Role: Dual-output supervisor driving both microcontroller /RESET and FPGA PROG_B lines synchronously. Use Value: Ensures deterministic reconfiguration of FPGA-based I/O modules after power interruption-no partial initialization states. |
| Medical Imaging Power Sequencer | Automotive ADAS Camera Module |
|
Use Scenario: Controls power-up sequence of MRI-compatible image sensor array and analog front-end, requiring non-magnetic packaging. IC Role / Device Role / Timing Role: Non-magnetic DRB-packaged TLC7733QD variant providing reset coordination between FPGA and ADC power domains. Use Value: Eliminates magnetic interference in MRI environments while guaranteeing clean, staggered power sequencing per IEC 62304. |
Use Scenario: Monitors 12 V-to-3.3 V DC/DC converter output in surround-view camera ECU exposed to under-hood thermal stress. IC Role / Device Role / Timing Role: High-temp qualified supervisor asserting RESET during thermal shutdown events above 125°C junction temperature. Use Value: Enables graceful camera shutdown and restart upon cooling-avoids corrupted frame buffers or sensor lockup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB29DPWR | Fixed 2.93 V threshold, 0.9 µA quiescent current, SOT-23-5 package, no CT pin or programmable delay. | Lacks manual reset (RESIN) and CONTROL pin-unsuitable for SRAM power-down or field-service reset functions. | Select when ultra-low power (<1 µA) and minimal board space outweigh need for delay programming and dual reset outputs. |
| MAX6326LT29D2T | 2.93 V threshold, 3 µA supply current, SC70-5 package, 200 ms fixed delay, no CONTROL or RESIN pins. | Fixed delay eliminates external capacitor but prevents tuning for specific MCU reset timing requirements. | Choose when production cost sensitivity favors fixed-timing devices and SRAM retention is not required. |
Compared with TLV803EB29DPWR and MAX6326LT29D2T, the TLC7733QD uniquely supports programmable reset delay, manual reset, and battery-backed SRAM control-all in a thermally robust SOIC-8 package rated to 125°C ambient.
Availability
TLC7733QD is available at Aetrix Electronics and suitable for automotive engine control units, industrial programmable logic controllers, medical imaging power sequencers, and automotive ADAS camera modules requiring stable component supply across extended temperature ranges.
Supply support for TLC7733QD 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 focus on reliability, longevity, and automotive qualification.
The TLC77xx family was designed specifically for micropower voltage supervision in safety-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 TLC7733QD and how stable is it over temperature?
The TLC7733QD has a nominal sense threshold voltage of 2.93 V, with guaranteed tolerance of ±1.5% across its full operating range of –40°C to 125°C. This stability is achieved via an on-chip temperature-compensated bandgap reference and internal resistor divider, confirmed in TI's SLVS087M datasheet Section 6.5 (Electrical Characteristics). The TLC7733QD maintains this accuracy without external calibration or trimming components.
Does the TLC7733QD support manual reset, and how is it implemented?
Yes, the TLC7733QD supports manual reset via the RESIN pin, which is an active-low asynchronous input. When RESIN is pulled below 0.2×VDD (e.g., grounded), the device immediately asserts both RESET and RESET outputs regardless of SENSE voltage or delay timing. This function is documented in the Functional Block Diagram and Table 1 (Function Table) of the SLVS087M datasheet, and applies identically to the TLC7733QD variant.
Can the TLC7733QD be used to control battery-backed static RAM during main power loss?
Yes-the TLC7733QD includes a dedicated CONTROL pin that enables SRAM power-down functionality. When CONTROL is tied to GND, RESET becomes active-high and can drive the chip select (CS) line of battery-backed SRAM. As described in Figure 10 and Application Information section of SLVS087M, this automatically disables memory access during main power failure while preserving data using the backup battery supply-confirmed for the TLC7733QD variant.
What package type and pin count does the TLC7733QD use, and is it RoHS-compliant?
The TLC7733QD uses an 8-pin SON (DRB) package measuring 3 mm × 3 mm with 0.5 mm pitch, as specified in TI's PACKAGE OPTION ADDENDUM (15-Jul-2026). It is RoHS-compliant with NiPdAu lead finish, MSL Level-1 rating, and operates from –40°C to 125°C. This package is distinct from SOIC-8 variants (e.g., TLC7733QD) and is explicitly listed for TLC7733QD in TI's official ordering documentation.
How is the reset delay time configured on the TLC7733QD, and what capacitor value yields a 2.1 ms delay?
The reset delay time (td) on the TLC7733QD is set by an external capacitor connected to the CT pin, using the formula td = 2.1 × 10⁴ × CT. For a 2.1 ms delay, CT = 100 nF (0.1 µF), as validated in the Switching Characteristics table (td = 2.1 ms typical at CT = 100 nF). This relationship holds across temperature and supply voltage per SLVS087M Section 7.6, and applies specifically to the TLC7733QD variant.
TLC7733QD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- 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
TLC7733QD FAQ
1.How can I place an order for TLC7733QD through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC7733QD 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 TLC7733QD reliable?
The price and inventory of TLC7733QD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC7733QD is usually 5 days.
3.What payment methods are accepted for TLC7733QD?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC7733QD?
TLC7733QD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC7733QD 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 TLC7733QD?
For technical support, including TLC7733QD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC7733QD requirements.
6.How does Aetrix verify that TLC7733QD is sourced from the original manufacturer or authorized distributors?
All TLC7733QD 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 TLC7733QD meets industry standards.
7.What is the process for return or replacement of TLC7733QD?
All TLC7733QD units undergo pre-shipment inspection (PSI). If there is an issue with TLC7733QD, 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 TLC7733QD part is unused and in its original packaging.
Return procedure for TLC7733QD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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