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Texas Instruments TL7757ILPE3
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- Part No.:
- TL7757ILPE3
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- TO-226-3, TO-92-3 (TO-226AA)
- Datasheet:
-
TL7757ILPE3.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
TL7757ILPE3 from Texas Instruments is a precision supply-voltage supervisor IC designed for microcomputer and microprocessor system reset management. It monitors VCC for undervoltage conditions, asserts active-low RESET below 4.55 V ±120 mV threshold, provides 20 mA sink capability, operates down to 1 V supply, and features 50 mV typical hysteresis to prevent erratic resets - used in industrial control power-up sequencing.
For engineers reviewing the TL7757ILPE3 datasheet, TL7757ILPE3 pinout, TL7757ILPE3 application, or TL7757ILPE3 equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative parts for reliable system-level reset design under −40°C to 85°C operating conditions.
Technical Context
The TL7757ILPE3 implements a comparator-based voltage detection architecture with internal resistor-divider network and hysteresis circuitry to generate a clean, glitch-free active-low RESET signal during power-up and brownout events. Its threshold is fixed at 4.55 V ±120 mV and remains stable across temperature (±0.01 V/°C drift).
It features low quiescent current (20 µA typical), defined RESET output behavior above 1 V VCC, and robust 20 mA sink drive into capacitive or resistive loads - enabling direct interface with microcontroller reset inputs without external pull-up or buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.55 V ±120 mV - ensures reliable detection of 5 V rail undervoltage before MCU enters undefined state |
| Hysteresis | 50 mV typical - prevents oscillatory reset assertion during slow VCC recovery near threshold |
| Output Sink Current | 20 mA - directly drives standard CMOS/TTL reset inputs without external transistor |
| Supply Range | 1 V to 7 V - enables valid reset assertion even during deep brownout or low-VCC startup |
| Quiescent Current | 20 µA - minimizes standby power impact in battery-backed or energy-sensitive systems |
| Propagation Delay | 5 µs max - guarantees timely reset assertion within microsecond-critical boot sequences |
| Operating Temp | −40°C to +85°C - qualified for industrial-grade embedded applications with thermal cycling |
Pinout & Package
TL7757ILPE3 is packaged in TO-92 (LP) - a 3-pin through-hole plastic package with formed leads, 5.34 mm max height, and GND connected to the metal tab for thermal and electrical grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | GND | Ground reference for internal comparator and output stage; electrically tied to metal tab |
| 2 (Base) | VCC | Primary supply input; powers internal circuitry and defines detection threshold reference |
| 3 (Collector) | RESET (open-drain) | Active-low reset output; requires external pull-up; sinks up to 20 mA when asserted |
Key Features
| Feature | Design Value |
|---|---|
| Precision threshold with tight tolerance | 4.55 V ±120 mV - eliminates need for external trimming in 5 V system supervision |
| Low-voltage reset enable | RESET defined at VCC ≥ 1 V - ensures deterministic reset behavior during ultra-slow power ramp-up |
| High noise immunity | 50 mV hysteresis - suppresses false triggers from supply ripple or EMI-induced VCC dips |
| Robust output drive | 20 mA sink capability - supports direct connection to diverse MCU reset pins (e.g., ARM Cortex-M, PIC, MSP430) |
| Industrial temperature range | −40°C to +85°C operation - validated for deployment in motor drives, PLCs, and outdoor IoT gateways |
Applications
| Industrial PLC Power Sequencing | Automotive Body Control Module |
|---|---|
Use Scenario: Power-on initialization of programmable logic controllers where stable 5 V rail must be confirmed before firmware execution. IC Role / Device Role / Timing Role: Voltage supervisor asserting RESET until VCC exceeds 4.55 V and remains stable for >5 µs. Use Value: Prevents corrupted register states and flash write errors during marginal AC/DC converter startup. |
Use Scenario: Reset coordination in body control units powered by vehicle battery with wide voltage swing (9–16 V). IC Role / Device Role / Timing Role: Monitors regulated 5 V domain; holds MCU in reset during cranking-induced brownouts (<6.5 V). Use Value: Eliminates unintended CAN message transmission or relay chatter during engine start transient. |
| Medical Infusion Pump Controller | Energy Meter Microcontroller Supervision |
Use Scenario: Safety-critical startup validation in battery-operated infusion pumps requiring fail-safe reset on power anomaly. IC Role / Device Role / Timing Role: Detects drop below 4.55 V on main 5 V rail and asserts RESET within 5 µs to halt motor actuation. Use Value: Meets IEC 62304 Class C software safety requirements via hardware-enforced reset initiation. |
Use Scenario: Long-life smart meter with supercapacitor backup; needs reliable reset during grid outage recovery. IC Role / Device Role / Timing Role: Supervises 3.3 V or 5 V system rail generated from buck converter; maintains RESET until stable post-brownout. Use Value: Guarantees EEPROM integrity and accurate timekeeping restart after 100 ms+ voltage dip. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | Adjustable threshold (via external resistor); 3.3 V fixed option; 1.8 µA IQ; SOT-23-6 | Requires external components for 4.55 V setting; better suited for low-power battery systems | Choose for ultra-low IQ designs where threshold flexibility justifies added BOM cost and layout area |
| MAX809SEUR+T | Fixed 3.08 V threshold; 12 µA IQ; SOT-23-3; no hysteresis spec beyond 150 mV min | Lower threshold incompatible with 5 V rail monitoring; lacks documented hysteresis performance | Select only if supervising 3.3 V domains and board space constraints favor SOT-23 footprint |
Compared with TL7757ILPE3, TPS3808G33DBVR offers lower power but requires configuration effort, while MAX809SEUR+T saves space yet cannot replace 4.55 V detection - making TL7757ILPE3 optimal for drop-in 5 V industrial reset supervision with proven thermal stability and noise margin.
Availability
TL7757ILPE3 is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical device applications requiring stable component supply with long-term lifecycle assurance.
Supply support for TL7757ILPE3 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 emphasis on reliability, longevity, and industrial-grade qualification.
The TL77xx family was engineered specifically for robust power-on reset and brownout protection in microcontroller-based systems - prioritizing threshold accuracy, hysteresis stability, and wide-temperature operation over feature richness.
FAQ
What is the exact reset threshold voltage of the TL7757ILPE3?
The TL7757ILPE3 has a nominal negative-going input threshold voltage (VIT−) of 4.55 V with a tolerance of ±120 mV over its full operating temperature range (−40°C to +85°C). This value is factory-trimmed and specified in the electrical characteristics table of the official TI datasheet SLVS041I.
Does the TL7757ILPE3 require an external pull-up resistor on the RESET pin?
Yes, the TL7757ILPE3 features an open-drain RESET output that must be pulled up externally - typically with a 10 kΩ resistor to the same VCC rail being monitored. This configuration allows flexible logic-level compatibility and avoids contention in multi-supervisor systems.
Can the TL7757ILPE3 operate reliably at VCC = 1.2 V?
Yes - the TL7757ILPE3 guarantees defined RESET output behavior at VCC ≥ 1 V, including proper hysteresis and propagation delay. At 1.2 V, it will assert RESET if VCC falls below the 4.55 V threshold (i.e., not applicable), but the internal circuit remains functional and ready to respond once VCC rises into valid range.
What is the maximum sink current capability of the TL7757ILPE3 RESET output?
The TL7757ILPE3 RESET output can sink up to 20 mA continuously while maintaining VOL ≤ 0.8 V at VCC = 4.3 V and TA = −40°C to +85°C. This rating is validated per the absolute maximum ratings and electrical characteristics sections of the TI datasheet SLVS041I.
Is the TL7757ILPE3 pin-compatible with other members of the TL77xx family?
No - TL7757ILPE3 uses the TO-92 (LP) 3-pin package with GND/VCC/RESET pinout, whereas TL7757CD (SOIC-8) and TL7757IPK (SOT-89-3) have different footprints and pin assignments. Direct PCB replacement requires layout revision; only electrical function (not mechanical fit) is shared across variants.
TL7757ILPE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.55V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 5µs Maximum Propagation Delay
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
TL7757ILPE3 FAQ
1.How can I place an order for TL7757ILPE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL7757ILPE3 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 TL7757ILPE3 reliable?
The price and inventory of TL7757ILPE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL7757ILPE3 is usually 5 days.
3.What payment methods are accepted for TL7757ILPE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL7757ILPE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL7757ILPE3?
TL7757ILPE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL7757ILPE3 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 TL7757ILPE3?
For technical support, including TL7757ILPE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL7757ILPE3 requirements.
6.How does Aetrix verify that TL7757ILPE3 is sourced from the original manufacturer or authorized distributors?
All TL7757ILPE3 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 TL7757ILPE3 meets industry standards.
7.What is the process for return or replacement of TL7757ILPE3?
All TL7757ILPE3 units undergo pre-shipment inspection (PSI). If there is an issue with TL7757ILPE3, 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 TL7757ILPE3 part is unused and in its original packaging.
Return procedure for TL7757ILPE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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