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Texas Instruments TLC7733IDRG4
- Part No.:
- TLC7733IDRG4
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC7733IDRG4.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,304
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Product details
Overview
TLC7733IDRG4 from Texas Instruments is a micropower supply voltage supervisor IC designed for reset control in microcomputer and microprocessor systems. It features a fixed 2.93 V negative-going input threshold voltage at SENSE, programmable delay time via external capacitor (td = 2.1 × 10⁴ × CT), defined RESET output down to VDD ≥ 1 V, and maximum supply current of 16 µA - enabling reliable power-on and undervoltage reset in battery-backed medical imaging equipment.
For engineers reviewing the TLC7733IDRG4 datasheet, TLC7733IDRG4 pinout, TLC7733IDRG4 application, or TLC7733IDRG4 equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases in static RAM power-down control, and validated alternative parts with documented functional and application differences.
Technical Context
The TLC7733IDRG4 implements a precision voltage-sensing comparator with temperature-compensated internal reference, monitoring the SENSE input against a fixed 2.93 V threshold. When VI(SENSE) drops below VIT–, it asserts active-low RESET after a user-programmable delay determined by an external capacitor connected to the CT pin.
It supports dual-mode operation: with CONTROL tied to GND, RESET becomes active-high for standard reset signaling; when CONTROL is driven by a memory bank select signal, it enables automatic chip-select disable during power failure - critical for data retention in static CMOS RAM with battery backup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 2.93 V (fixed negative-going SENSE threshold; ensures stable reset assertion at nominal 3.3 V rail) |
| Supply Voltage Range | 2 V to 6 V (supports wide-input industrial and battery-powered systems without external regulation) |
| Max Supply Current | 16 µA (enables multi-year operation in low-power, battery-backed applications) |
| Delay Time Formula | td = 2.1 × 10⁴ × CT (allows precise, capacitor-tuned reset hold-off from ~1.1 ms to seconds) |
| Operating Temperature | –40°C to 85°C (qualified for commercial/industrial ambient environments) |
| Output Type | Totem-pole (drives RESET directly without pull-up; reduces BOM count and layout area) |
| Hysteresis | 70 mV (prevents chatter during slow-rising/falling supply transitions) |
Pinout & Package
Package: 8-pin SON (DRB), 3 mm × 3 mm, 0.5 mm pitch, wettable flank - optimized for automated optical inspection and high-reliability medical imaging applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Accepts 2–6 V; powers internal reference, comparator, and output stage |
| GND | Ground reference | Return path for all internal circuitry and output current |
| SENSE | Voltage monitor input | Compares applied voltage against 2.93 V threshold; hysteresis improves noise immunity |
| CONTROL | Mode selection input | Low = active-high RESET; high = active-low RESET; enables RAM power-down logic |
| RESIN | Manual reset input | Active-low asynchronous reset override; debounced internally |
| CT | Capacitor timing terminal | Connects external capacitor to set delay time td = 2.1 × 10⁴ × CT |
| RESET | Active-low reset output | Open-drain compatible; totem-pole structure drives low without external pull-up |
| RESET | Active-high reset output | Complementary to RESET; supports dual-signaling microcontroller interfaces |
Key Features
| Feature | Design Value |
|---|---|
| Power-on reset generator | Asserts RESET when VDD rises above 1 V - ensures CPU starts only after minimum supply stability |
| Programmable delay time | External capacitor sets delay from milliseconds to seconds, eliminating need for RC timing on PCB |
| Temperature-compensated reference | Maintains ±1.5% threshold accuracy over –40°C to 85°C - no calibration required across operating range |
| Static RAM power-down support | CONTROL-driven logic disables memory CS during brownout - preserves data in battery-backed SRAM |
| Low quiescent current | 9–16 µA typical supply current - extends battery life in portable diagnostic equipment |
Applications
| Medical Imaging Power Sequencing | Industrial PLC Controller Reset |
|---|---|
|
Use Scenario: MRI and ultrasound subsystems require deterministic power-up sequencing and brownout recovery to prevent corrupted image acquisition. IC Role / Device Role / Timing Role: TLC7733IDRG4 monitors 3.3 V logic rail and asserts RESET until stable, then holds for programmable delay before releasing CPU. Use Value: Eliminates firmware-based reset timing; guarantees hardware-enforced minimum reset pulse width per JEDEC JESD8-12. |
Use Scenario: Programmable logic controllers operate in electrically noisy factory environments with fluctuating 24 V DC supplies stepped down to 5 V/3.3 V rails. IC Role / Device Role / Timing Role: TLC7733IDRG4 senses 3.3 V microcontroller supply and triggers reset on dips below 2.93 V with 70 mV hysteresis. Use Value: Prevents erratic MCU behavior during transient line sags - avoids spurious I/O toggling or watchdog timeouts. |
| Battery-Backed Data Logger | Point-of-Care Diagnostic Device |
|
Use Scenario: Portable environmental sensors log data continuously using static CMOS RAM backed by coin-cell battery during main power loss. IC Role / Device Role / Timing Role: TLC7733IDRG4's CONTROL pin links to MPU address decode; disables RAM CS before VDD collapse. Use Value: Guarantees zero data corruption during power transition - no software intervention needed. |
Use Scenario: Handheld blood glucose or ECG analyzers must retain calibration and patient history across frequent battery swaps. IC Role / Device Role / Timing Role: TLC7733IDRG4 supervises 3.3 V rail and provides clean, glitch-free RESET to ARM Cortex-M0 host MCU. Use Value: Meets IEC 60601-1 leakage and reliability requirements via certified 3 mm × 3 mm DRB package and <16 µA IDD. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC7733QD | Same 2.93 V threshold and DRB-compatible SOIC-8 package, but rated for –40°C to 125°C operation | Required for under-hood automotive or high-temp industrial enclosures where ambient exceeds 85°C | Select TLC7733QD if extended temperature qualification is mandatory; otherwise TLC7733IDRG4 suffices for commercial-grade designs |
| TPS3808G33DBVR | Fixed 3.3 V threshold, 360 nA quiescent current, 200 ms factory-fixed delay - no external capacitor needed | Suitable for space-constrained IoT nodes where ultra-low power and minimal external components outweigh programmable delay flexibility | Choose TPS3808G33DBVR only when delay tuning is unnecessary and sub-µA supply current is critical; not drop-in due to different pinout and timing architecture |
Compared with TLC7733QD, the TLC7733IDRG4 trades extended temperature range for lower cost and sufficient performance in commercial medical devices; versus TPS3808G33DBVR, it offers field-adjustable delay and higher drive strength at the expense of higher quiescent current - making it optimal for cost-sensitive, programmable-reset applications.
Availability
TLC7733IDRG4 is available at Aetrix Electronics and suitable for medical imaging power sequencing, industrial PLC controller reset, and battery-backed data logger applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TLC7733IDRG4 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 over 90 years of innovation in precision analog ICs and power management.
The TLC77xx family was engineered specifically for micropower voltage supervision in safety-critical, battery-dependent systems - emphasizing low IDD, guaranteed reset assertion at VDD ≥1 V, and robust hysteresis for noisy industrial environments.
FAQ
What is the exact threshold voltage of the TLC7733IDRG4, and how is it specified?
The TLC7733IDRG4 has a fixed negative-going input threshold voltage of 2.93 V at the SENSE pin, with a tolerance of ±0.07 V (2.86 V to 3.00 V) over the full operating temperature range and supply voltage (2 V to 6 V). This value is measured under standardized test conditions per the SLVS087M datasheet and applies directly to the TLC7733IDRG4 device in its DRB package.
Does the TLC7733IDRG4 require an external pull-up resistor on the RESET pin?
No, the TLC7733IDRG4 uses a totem-pole output stage for both RESET and RESET pins, enabling direct drive of microcontroller reset inputs without external pull-up resistors. This reduces bill-of-materials count and eliminates potential timing skew caused by RC delays - a confirmed design feature of the TLC7733IDRG4 as documented in the "Power Saving Totem-Pole Outputs" section of the datasheet.
How is the reset delay time set on the TLC7733IDRG4, and what capacitor value yields a 200 ms delay?
The reset delay time (td) on the TLC7733IDRG4 is set by an external capacitor connected to the CT pin, using the formula td = 2.1 × 10⁴ × CT. For a 200 ms delay, CT = 200 × 10⁻³ / 2.1 × 10⁴ = 9.52 nF - a standard 10 nF ceramic capacitor achieves this within datasheet tolerance. This relationship is explicitly defined for the TLC7733IDRG4 in the Electrical Characteristics table and Timing Diagrams of SLVS087M.
Can the TLC7733IDRG4 be used to supervise a 5 V supply rail?
Yes, the TLC7733IDRG4 supports supply voltages from 2 V to 6 V, and its 2.93 V SENSE threshold is fully valid at VDD = 5 V. The device maintains specified electrical performance - including VOH ≥ 4.3 V, VOL ≤ 0.2 V, and threshold accuracy - across this range. This capability is confirmed in the Recommended Operating Conditions and Electrical Characteristics tables for the TLC7733IDRG4.
What is the operating temperature range of the TLC7733IDRG4, and how does it differ from the TLC7733QD variant?
The TLC7733IDRG4 is characterized for operation from –40°C to +85°C, matching the "I" grade specification. In contrast, the TLC7733QD variant is qualified for –40°C to +125°C ("Q" grade), intended for higher-temperature industrial or automotive under-hood applications. Both share identical electrical specifications at their respective temperature extremes, as verified in the TI SLVS087M datasheet revision M.
TLC7733IDRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TLC7733IDRG4 FAQ
1.How can I place an order for TLC7733IDRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC7733IDRG4 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 TLC7733IDRG4 reliable?
The price and inventory of TLC7733IDRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC7733IDRG4 is usually 5 days.
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TLC7733IDRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC7733IDRG4 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 TLC7733IDRG4?
For technical support, including TLC7733IDRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC7733IDRG4 requirements.
6.How does Aetrix verify that TLC7733IDRG4 is sourced from the original manufacturer or authorized distributors?
All TLC7733IDRG4 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 TLC7733IDRG4 meets industry standards.
7.What is the process for return or replacement of TLC7733IDRG4?
All TLC7733IDRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLC7733IDRG4, 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 TLC7733IDRG4 part is unused and in its original packaging.
Return procedure for TLC7733IDRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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