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Texas Instruments TLC7733QPWRG4
- Part No.:
- TLC7733QPWRG4
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC7733QPWRG4.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,444
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Product details
Overview
TLC7733QPWRG4 from Texas Instruments is a micropower supply voltage supervisor IC with fixed 2.93 V threshold, active-low RESET output, programmable delay via external capacitor, and operation across –40°C to 125°C. It provides power-on reset generation, undervoltage monitoring, and power-down control for static RAM with battery backup - used in medical imaging systems requiring high-reliability voltage supervision under wide temperature extremes.
For engineers reviewing the TLC7733QPWRG4 datasheet, TLC7733QPWRG4 pinout, TLC7733QPWRG4 application, or TLC7733QPWRG4 equivalent, this page delivers verified specifications, DRB-package terminal mapping, real-world use cases in safety-critical embedded systems, and validated alternative options for design continuity and sourcing resilience.
Technical Context
The TLC7733QPWRG4 implements a precision bandgap-based voltage reference with temperature compensation to maintain stable 2.93 V (±3%) sensing across –40°C to 125°C. Its internal timer generates a user-programmable reset delay (td = 2.1 × 10⁴ × CT) triggered when SENSE falls below threshold or during power-up.
It features dual-output logic: active-low RESET and active-high RESET, both driven by totem-pole outputs capable of ±2 mA drive strength. The CONTROL input enables RAM power-down mode, while RESIN allows manual reset assertion - all operating within 2 V to 6 V supply range and consuming ≤16 µA quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 2.93 V ±3% - precise undervoltage detection point for 3.3 V rail monitoring without external resistors. |
| Supply Range | 2 V to 6 V - supports single-supply operation across Li-ion, 3.3 V, and 5 V systems. |
| Quiescent Current | ≤16 µA at VDD = 5 V - enables multi-year battery life in always-on supervisory applications. |
| Reset Delay | Programmable via CT (e.g., 100 nF → ~2.1 ms) - ensures reliable system initialization timing control. |
| Operating Temperature | –40°C to 125°C - qualified for automotive under-hood and industrial motor-control environments. |
| Output Drive | ±2 mA - sufficient to directly drive microcontroller reset inputs or small logic loads without buffering. |
| Power-Up Reset Level | Active at VDD ≥1 V - guarantees early assertion before core logic becomes operational. |
Pinout & Package
Package: 8-pin 3×3 mm SON (DRB), moisture-sensitive level 1, RoHS-compliant, lead finish NiPdAu.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Return path for all internal circuitry and output drivers; must be low-impedance for noise immunity. |
| VDD | Positive supply input | Primary power source (2–6 V); powers internal reference, comparator, and output stages. |
| SENSE | Voltage monitor input | Connects to monitored rail; asserts reset when voltage drops below 2.93 V threshold. |
| CONTROL | RAM power-down enable | Low = enables active-high RESET for static RAM chip-select control during brownout. |
| RESIN | Manual reset input | Active-low asynchronous reset override; pulls RESET low when asserted. |
| RESET | Active-low reset output | Drives microcontroller / processor reset pin; open-drain compatible with pull-up. |
| RESET | Active-high reset output | Complementary to RESET; used for direct interface with logic requiring high-active reset. |
| NC | No connect | Unbonded pad; must remain unconnected per TI DRB package specification. |
Key Features
| Feature | Design Value |
|---|---|
| Temperature-compensated reference | Maintains ±3% threshold accuracy over –40°C to 125°C - eliminates need for external calibration in harsh environments. |
| Programmable reset delay | Delay time set by single external capacitor (td = 2.1 × 10⁴ × CT) - replaces RC networks and saves board space. |
| Defined reset at VDD ≥1 V | Guarantees reset assertion before digital logic powers up - prevents undefined startup states. |
| Power-down control for SRAM | CONTROL input enables automatic chip-select disable during power loss - preserves data in battery-backed memory. |
| Low-power totem-pole outputs | Delivers ±2 mA drive with <0.5 V VOL at 2 mA - eliminates external pull-ups and reduces BOM count. |
Applications
| Medical Imaging Power Sequencing | Automotive Engine Control Unit (ECU) |
|---|---|
|
Use Scenario: Supervising 3.3 V and 5 V rails in MRI subsystems where power integrity directly impacts image fidelity and patient safety. IC Role / Device Role / Timing Role: Primary voltage supervisor asserting RESET until both rails stabilize above 2.93 V and delay expires. Use Value: Prevents partial initialization of FPGA-based image processors during cold-start or transient dips - avoiding corrupted scan data. |
Use Scenario: Monitoring microcontroller supply in engine management modules exposed to under-hood temperatures up to 125°C. IC Role / Device Role / Timing Role: Undervoltage detector triggering controlled shutdown before brownout causes EEPROM corruption. Use Value: Ensures deterministic reset behavior across full automotive temperature range without derating or external hysteresis components. |
| Industrial PLC I/O Module | Battery-Backed Data Logger |
|
Use Scenario: Securing startup sequence of ARM Cortex-M7-based controller in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Dual-output supervisor providing both active-low and active-high reset signals to mixed-vendor peripherals. Use Value: Eliminates need for level-shifting or inverters when interfacing with legacy sensors requiring high-active reset. |
Use Scenario: Enabling data retention in static CMOS RAM during main power failure in remote environmental monitors. IC Role / Device Role / Timing Role: Power-down controller using CONTROL input to gate RAM chip-select when VDD drops below threshold. Use Value: Extends battery life by disabling RAM access during brownout while preserving stored sensor history. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB29DPWR | 2.93 V threshold, 350 ms fixed delay, 1.8–6 V supply, 0.5 µA IQ | Fixed delay eliminates capacitor but lacks programmability and RAM power-down logic | Select when ultra-low IQ and simplified BOM outweigh need for adjustable timing or SRAM control |
| TPS3808G33DBVR | 3.3 V threshold, 200 ms fixed delay, 1.8–6.5 V supply, 12 µA IQ, watchdog timer | Higher threshold and integrated watchdog - not drop-in for 2.93 V 3.3 V rail monitoring | Choose when system requires combined reset + watchdog functionality and can tolerate 3.3 V trip point |
Compared with TLC7733QPWRG4, TLV803EB29DPWR offers lower power but forfeits delay tuning and RAM control; TPS3808G33DBVR adds watchdog capability but shifts threshold upward, requiring redesign of voltage-monitoring network.
Availability
TLC7733QPWRG4 is available at Aetrix Electronics and suitable for medical imaging equipment, automotive ECU designs, and industrial PLC modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TLC7733QPWRG4 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 and embedded processing solutions with emphasis on reliability, longevity, and industrial-grade qualification.
The TLC77xx family was designed specifically for robust voltage supervision in mission-critical embedded systems - prioritizing precision threshold stability, wide-temperature operation, and integrated power-down control for battery-backed memory.
FAQ
What is the exact threshold voltage tolerance of the TLC7733QPWRG4 over temperature?
The TLC7733QPWRG4 has a nominal threshold voltage of 2.93 V with ±3% tolerance over the full operating range of –40°C to 125°C, as specified in the Electrical Characteristics table of the SLVS087M datasheet. This includes contributions from initial accuracy, temperature drift, and supply variation - no additional derating is required for design margin.
Does the TLC7733QPWRG4 support active-high reset only, or does it provide both polarities?
The TLC7733QPWRG4 provides both active-low RESET and active-high RESET outputs simultaneously. These complementary signals are generated internally and driven by totem-pole outputs, enabling direct interface with microcontrollers or logic that require either polarity without external inverters.
Can the TLC7733QPWRG4 be used to supervise a 1.8 V supply rail?
No - the TLC7733QPWRG4 is not suitable for supervising 1.8 V rails because its 2.93 V threshold exceeds the rail voltage. For 1.8 V supervision, a device such as the TLV803E18DPWR (1.8 V threshold) would be appropriate; the TLC7733QPWRG4 is optimized for 3.3 V systems.
How is the reset delay time calculated for the TLC7733QPWRG4?
The reset delay time td for the TLC7733QPWRG4 is calculated using the formula 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 rises above threshold and ensures stable power before releasing reset.
Is the TLC7733QPWRG4 pin-compatible with other members of the TLC77xx family in the DRB package?
Yes - all TLC77xx devices in the DRB package (e.g., TLC7701, TLC7725, TLC7703, TLC7705) share identical 8-pin pinout and footprint. This allows direct substitution within the same family when only threshold voltage or temperature grade differs, provided the CONTROL/RESIN logic and output polarity requirements align.
TLC7733QPWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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-TSSOP
TLC7733QPWRG4 FAQ
1.How can I place an order for TLC7733QPWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC7733QPWRG4 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 TLC7733QPWRG4 reliable?
The price and inventory of TLC7733QPWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC7733QPWRG4 is usually 5 days.
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Once your TLC7733QPWRG4 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 TLC7733QPWRG4?
For technical support, including TLC7733QPWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC7733QPWRG4 requirements.
6.How does Aetrix verify that TLC7733QPWRG4 is sourced from the original manufacturer or authorized distributors?
All TLC7733QPWRG4 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 TLC7733QPWRG4 meets industry standards.
7.What is the process for return or replacement of TLC7733QPWRG4?
All TLC7733QPWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLC7733QPWRG4, 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 TLC7733QPWRG4 part is unused and in its original packaging.
Return procedure for TLC7733QPWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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