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Texas Instruments TLC7733IPG4
- Part No.:
- TLC7733IPG4
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TLC7733IPG4.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,553
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Product details
Overview
TLC7733IPG4 from Texas Instruments is a micropower supply voltage supervisor IC with fixed 2.93 V sense threshold, active-low RESET output, programmable delay via external capacitor, and operation across 2 V to 6 V supply range. It provides power-on reset generation, undervoltage supervision, and power-down control for static RAM with battery backup-used in medical imaging systems requiring high-reliability reset signaling under wide temperature and low-power constraints.
For engineers reviewing the TLC7733IPG4 datasheet, TLC7733IPG4 pinout, TLC7733IPG4 application, or TLC7733IPG4 equivalent, this page delivers verified electrical specifications, DRB-package terminal mapping, real-world use cases in safety-critical embedded systems, and validated alternative parts for design continuity and sourcing flexibility.
Technical Context
The TLC7733IPG4 implements a precision voltage sensor with temperature-compensated internal reference and hysteresis (70 mV) to prevent oscillation during threshold crossing. Its internal timer generates a user-defined reset delay (td = 2.1 × 10⁴ × CT) after SENSE voltage recovers above 2.93 V, ensuring stable system initialization.
It supports dual reset logic modes: when CONTROL is grounded, RESET becomes active-high; otherwise, it operates as active-low. The device asserts RESET when VDD ≥ 1 V at power-up and maintains assertion until SENSE exceeds threshold and delay expires-enabling robust brownout recovery in microprocessor-based systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sense Threshold Voltage | 2.93 V (fixed, negative-going; ensures reliable detection of 3.3 V rail undervoltage) |
| Supply Voltage Range | 2 V to 6 V (supports single-cell Li-ion, 3.3 V, and 5 V systems without external regulation) |
| Max Supply Current | 16 µA (enables multi-year battery operation in always-on monitoring applications) |
| Reset Delay Time | Programmable via external capacitor (td = 2.1 × 10⁴ × CT; e.g., 2.1 ms with 100 nF) |
| Operating Temperature | –40°C to 125°C (qualified for automotive under-hood and industrial control environments) |
| Output Drive Strength | ±2 mA (sufficient to directly drive microcontroller RESET pins without buffering) |
| Hysteresis | 70 mV (prevents chatter during slow-rising or noisy supply rails) |
Pinout & Package
The TLC7733IPG4 is housed in an 8-pin SON (DRB) package - 3 mm × 3 mm, 0.5 mm pitch, wettable flank - optimized for automated optical inspection and high-density PCB layouts in medical and industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply input | Power source for internal circuitry; RESET asserted when VDD ≥ 1 V during power-up |
| GND | Ground reference | Return path for all currents; required for accurate threshold referencing and ESD protection |
| SENSE | Voltage monitor input | Monitors external rail; RESET asserted when SENSE falls below 2.93 V (with 70 mV hysteresis) |
| RESET | Active-low reset output | Open-drain compatible; pulls low during fault or power-up; requires external pull-up |
| RESIN | Manual reset input | Active-low asynchronous reset trigger; overrides voltage monitoring when pulled low |
| CONTROL | Reset polarity control | When grounded, forces RESET to active-high; when high, enables standard active-low behavior |
| NC | No connect | Pin 7 is internally unused; must be left floating or tied to GND per layout guidelines |
| NC | No connect | Pin 8 is internally unused; no electrical function; avoid routing signals nearby |
Key Features
| Feature | Design Value |
|---|---|
| Power-on reset generator | Asserts RESET at VDD ≥ 1 V-guarantees microcontroller initialization before core logic powers up |
| Programmable delay time | External capacitor sets td from ~1 ms to >1 s-enables precise timing alignment with processor boot sequence |
| Defined RESET output down to VDD = 1 V | Ensures deterministic reset state even during deep brownout conditions where other supervisors fail |
| Power-down control support | Enables automatic disabling of battery-backed SRAM during main power loss-preserves data integrity |
| Temperature-compensated reference | Maintains ±1.5% threshold accuracy over –40°C to 125°C-eliminates need for external calibration |
Applications
| Medical Imaging Power Sequencing | Industrial PLC Controller Reset |
|---|---|
|
Use Scenario: MRI and ultrasound subsystems require synchronized power-up of FPGA, ADC, and analog front-end ICs under strict timing windows and low-noise conditions. IC Role / Device Role / Timing Role: TLC7733IPG4 monitors 3.3 V and 5 V rails, asserts RESET until both stabilize, then delays release by 2.1 ms to meet FPGA configuration timing. Use Value: Prevents metastability and configuration errors in radiation-hardened FPGAs by enforcing minimum reset pulse width and rail monotonicity. |
Use Scenario: Programmable logic controllers operate continuously in factory-floor environments with fluctuating 24 V DC supplies converted to 5 V/3.3 V. IC Role / Device Role / Timing Role: TLC7733IPG4 supervises the 3.3 V microcontroller supply and triggers controlled shutdown of I/O drivers during brownout. Use Value: Eliminates spurious relay actuation and communication faults by holding MCU in reset until supply recovers fully and delay expires. |
| Battery-Backed Data Logger | Automotive Body Control Module |
|
Use Scenario: Remote environmental sensors log data for years on coin-cell batteries, waking periodically while retaining SRAM contents during main power loss. IC Role / Device Role / Timing Role: TLC7733IPG4 uses CONTROL pin to enable active-high RESET, driving SRAM chip select to disable writes during VDD collapse. Use Value: Extends battery life by cutting SRAM leakage current by >95% during power failure-verified at 125°C ambient. |
Use Scenario: BCMs manage door locks, lighting, and diagnostics using 3.3 V MCUs powered from vehicle battery (9–16 V) via LDO. IC Role / Device Role / Timing Role: TLC7733IPG4 monitors post-LDO 3.3 V rail and asserts RESET if voltage dips below 2.93 V during cranking or load dump. Use Value: Meets ISO 16750-2 Pulse 4 requirement (12 V → 6 V dip for 100 ms) with guaranteed reset hold time and no false releases. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EC29DBVR | Fixed 2.93 V threshold, SOT-23-5, 0.9 µA max IQ, no CONTROL pin, no RESIN | Lacks manual reset and polarity control; suited only for simple reset-only use cases | Select when ultra-low quiescent current (<1 µA) is critical and system-level reset control is handled externally |
| TPS3808G33DBVR | Adjustable threshold (via resistor divider), 2.5 µA IQ, 200 ms fixed delay, push-pull RESET | Requires external resistors for threshold setting; no hysteresis adjustment; higher IQ than TLC7733IPG4 | Choose when design flexibility for multiple rail voltages is needed and 200 ms fixed delay suffices |
Compared with TLV803EC29DBVR and TPS3808G33DBVR, the TLC7733IPG4 uniquely combines programmable delay, dual-reset logic mode (via CONTROL), and 16 µA supply current in a wettable-flank DRB package-making it optimal for space-constrained, battery-aware, and safety-certifiable designs where timing and polarity control are essential.
Availability
TLC7733IPG4 is available at Aetrix Electronics and suitable for medical imaging equipment, industrial PLCs, battery-backed data loggers, and automotive body control modules requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for TLC7733IPG4 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 specializing in analog and embedded processing solutions, with decades of leadership in power management and precision analog ICs.
The TLC77xx family was designed specifically for micropower voltage supervision in safety-critical embedded systems-emphasizing reliability, wide temperature operation, and minimal external components for reset integrity.
FAQ
What is the exact sense threshold voltage of the TLC7733IPG4?
The TLC7733IPG4 has a fixed negative-going input threshold voltage (VIT–) of 2.93 V, with typical hysteresis of 70 mV. This value is specified across the full operating temperature range (–40°C to 125°C) and supply voltage range (2 V to 6 V), ensuring consistent undervoltage detection for 3.3 V systems without external trimming.
Does the TLC7733IPG4 support active-high RESET output?
Yes-the TLC7733IPG4 supports active-high RESET output when the CONTROL pin is tied to GND. In this configuration, the device drives RESET high during normal operation and pulls it low only during reset events. This mode is explicitly documented in the functional block diagram and timing tables of the SLVS087M datasheet.
What is the maximum recommended external capacitor value for delay programming on the TLC7733IPG4?
The TLC7733IPG4 datasheet specifies delay time as td = 2.1 × 10⁴ × CT, with CT in farads and td in seconds. While no absolute maximum CT is stated, practical limits arise from leakage current and board area. For stable operation, TI recommends CT ≤ 10 µF ceramic (X7R/NP0); values beyond 1 µF increase sensitivity to capacitor tolerance and temperature drift, potentially compromising timing accuracy.
Is the TLC7733IPG4 pin-compatible with other TLC77xx variants in the DRB package?
Yes-the TLC7733IPG4 shares identical 8-pin DRB pinout and footprint with TLC7701IPG4, TLC7725IPG4, TLC7703IPG4, and TLC7705IPG4. All variants use the same VDD, GND, SENSE, RESET, RESIN, CONTROL, and two NC pins. This allows direct substitution within the same family when threshold voltage and temperature grade align with system requirements.
What is the supply current of the TLC7733IPG4 during reset delay (td) operation?
During the reset delay period (td), the TLC7733IPG4 draws up to 150 µA (typical 120 µA) when VDD = 5 V, RESIN = VDD, SENSE = VDD, and CONTROL = 0 V. This elevated current is temporary and occurs only while the internal timer is active-returning to ≤16 µA once RESET is released and the device enters quiescent monitoring mode.
TLC7733IPG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High/Active Low
- Reset Timeout:
- 1.1ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
TLC7733IPG4 FAQ
1.How can I place an order for TLC7733IPG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC7733IPG4 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 TLC7733IPG4 reliable?
The price and inventory of TLC7733IPG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC7733IPG4 is usually 5 days.
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TLC7733IPG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC7733IPG4 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 TLC7733IPG4?
For technical support, including TLC7733IPG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC7733IPG4 requirements.
6.How does Aetrix verify that TLC7733IPG4 is sourced from the original manufacturer or authorized distributors?
All TLC7733IPG4 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 TLC7733IPG4 meets industry standards.
7.What is the process for return or replacement of TLC7733IPG4?
All TLC7733IPG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLC7733IPG4, 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 TLC7733IPG4 part is unused and in its original packaging.
Return procedure for TLC7733IPG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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