My Inquiry
My Account
Texas Instruments TL7757CLPR
,TO-226_straightlead.jpg)
- Part No.:
- TL7757CLPR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Datasheet:
-
TL7757CLPR.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL TO92-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,972
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TL7757CLPR 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 when VCC drops below 4.55 V ±120 mV, provides 20 mA output sink capability, features 40–60 mV hysteresis to prevent erratic resets, and operates down to 1 V supply - enabling reliable power-on reset generation in embedded control applications.
For engineers reviewing the TL7757CLPR datasheet, TL7757CLPR pinout, TL7757CLPR application, or TL7757CLPR equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use cases, and validated alternative options for industrial-grade voltage monitoring and reset supervision.
Technical Context
The TL7757CLPR implements a comparator-based threshold detection architecture with built-in hysteresis (40–60 mV) to reject noise-induced false triggers during brownout recovery. Its internal circuitry generates a defined low-level RESET output as soon as VCC exceeds 1 V, ensuring deterministic initialization before processor core voltage reaches operational levels.
It functions as a standalone, single-threshold supervisory device with no external components required for basic operation - relying on internal resistor divider network and bipolar transistor output stage. The device does not include watchdog timer, manual reset input, or programmable delay features.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Voltage | 4.55 V ±120 mV - precise undervoltage detection point for 5 V systems, with guaranteed trip margin across temperature. |
| Reset Output Type | Active-low open-collector - requires external pull-up; supports wired-OR configuration and level translation. |
| Output Sink Current | 20 mA - sufficient to directly drive TTL/CMOS inputs or small relay drivers without buffering. |
| Supply Current | 20 µA typical - ultra-low standby power enables use in battery-backed or energy-sensitive applications. |
| Hysteresis | 40–60 mV - prevents oscillation during slow VCC recovery by enforcing distinct rising/falling thresholds. |
| Operating Temperature | 0°C to 70°C - commercial-grade rating suitable for industrial control panels and consumer electronics. |
| Minimum Valid VCC | 1 V - RESET becomes defined at very low supply levels, enabling early fault detection during power ramp-up. |
Pinout & Package
TL7757CLPR is housed in a TO-92 (LP) through-hole package with 3 leads, optimized for cost-sensitive, low-density PCB layouts and legacy assembly processes. Lead 1 = GND, Lead 2 = VCC, Lead 3 = RESET (open-collector output).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | GND | Ground reference for internal comparator and output stage; electrically connected to metal tab in LP package. |
| Lead 2 | VCC | Power supply input; monitored for undervoltage; must be ≥1 V for RESET output to be valid. |
| Lead 3 | RESET | Active-low open-collector output; sinks up to 20 mA; requires external pull-up resistor to host supply rail. |
Key Features
| Feature | Design Value |
|---|---|
| Precision threshold accuracy | ±120 mV tolerance at 4.55 V ensures reliable 5 V system supervision without calibration. |
| Low-power operation | 20 µA quiescent current minimizes impact on standby power budget in always-on subsystems. |
| No external components needed | Self-contained detection and output stage eliminates BOM count and layout complexity for basic reset functions. |
| Robust noise immunity | 40–60 mV hysteresis suppresses false resets caused by supply ripple or transient coupling. |
| Early-reset assertion | RESET becomes active at VCC ≥1 V - guarantees processor remains held until stable operating voltage is reached. |
Applications
| Industrial PLC I/O Module | Consumer Set-Top Box |
|---|---|
Use Scenario: Power sequencing failure during cold start causes FPGA configuration corruption. IC Role / Device Role / Timing Role: Monitors 5 V rail and holds microcontroller in reset until voltage stabilizes above 4.43 V. Use Value: Prevents undefined state execution and firmware lockup by guaranteeing clean boot sequence under marginal AC line conditions. |
Use Scenario: Mains interruption followed by rapid restoration induces brief 4.2 V dip on main 5 V rail. IC Role / Device Role / Timing Role: Detects sub-threshold event and asserts RESET for ≥5 µs to force full system reboot. Use Value: Eliminates frozen UI or audio dropout by enforcing hard reset instead of allowing partial initialization. |
| Automotive Body Control Module | Medical Infusion Pump Controller |
Use Scenario: Load dump transient collapses 5 V logic rail momentarily during alternator regulation fault. IC Role / Device Role / Timing Role: Triggers immediate RESET upon VCC falling below 4.4 V, with hysteresis preventing chatter during recovery. Use Value: Ensures safety-critical MCU reinitializes fully rather than resuming corrupted state after voltage dip. |
Use Scenario: Battery swap in portable pump causes 5 V DC-DC output to sag below 4.5 V for 12 ms. IC Role / Device Role / Timing Role: Generates minimum 5 µs RESET pulse synchronized to VCC crossing 4.4 V threshold. Use Value: Guarantees motor driver and sensor interface are reinitialized before therapy resumes, meeting IEC 62304 Class B requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G33DBVR | 3.3 V fixed threshold; 350 nA quiescent current; SOT-23-5 package; includes manual reset input. | Designed for ultra-low-power 3.3 V systems; lacks TO-92 through-hole option and higher sink current. | Select when board space is constrained and 3.3 V supervision with extended battery life is prioritized over mechanical mounting flexibility. |
| MAX809SEUR+T | 4.63 V threshold (±1.5%); 12 µA quiescent current; SOT-23-3 package; no hysteresis spec beyond 0.25% of VTH. | Higher threshold tolerance and smaller footprint; lower hysteresis margin increases susceptibility to noise in noisy environments. | Choose for compact surface-mount designs where tighter initial threshold accuracy outweighs need for robust hysteresis in EMI-prone settings. |
Compared with TL7757CLPR, TPS3808G33DBVR offers superior power efficiency but targets different voltage domains and form factors, while MAX809SEUR+T trades hysteresis robustness for tighter threshold tolerance in space-constrained SMT layouts.
Availability
TL7757CLPR is available at Aetrix Electronics and suitable for industrial control panels, consumer electronics power management, and medical device reset supervision requiring stable component supply across long production lifecycles.
Supply support for TL7757CLPR 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 specializing in analog, embedded processing, and power management technologies with over 50 years of industrial reliability heritage.
The TL77xx family was engineered for cost-effective, high-reliability voltage monitoring in microprocessor-based systems - emphasizing simplicity, wide temperature operation, and proven field performance in mission-critical reset applications.
FAQ
What is the exact reset threshold voltage of TL7757CLPR and how does it vary with temperature?
The TL7757CLPR has a nominal negative-going input threshold voltage (VIT−) of 4.55 V with ±120 mV tolerance over 0°C to 70°C. Per datasheet Figure 10, VIT− drifts less than ±10 mV across that range, maintaining 4.4 V to 4.7 V functional window. This stability ensures consistent 5 V system supervision without recalibration.
Does TL7757CLPR require an external pull-up resistor on the RESET pin?
Yes, TL7757CLPR features an open-collector RESET output and requires an external pull-up resistor to the host supply rail (e.g., 5 V or 3.3 V). Typical values range from 4.7 kΩ to 10 kΩ, balancing rise time and power consumption while supporting the full 20 mA sink capability of TL7757CLPR.
Can TL7757CLPR operate with supply voltages below 4.55 V and still produce a valid RESET signal?
Yes - TL7757CLPR defines its RESET output as soon as VCC exceeds 1 V (per datasheet Section 3), and remains active low until VCC rises above the 4.55 V threshold. This allows TL7757CLPR to provide deterministic reset behavior even during slow power ramps or brownout recovery sequences.
What is the maximum sink current capability of TL7757CLPR's RESET output?
TL7757CLPR guarantees 20 mA sink current at VCC = 4.3 V and ambient temperature of 25°C (IOL = 20 mA, VOL ≤ 0.8 V). At 0°C to 70°C, the output maintains ≤0.8 V saturation voltage under 20 mA load, enabling direct interfacing with standard logic families and small-signal loads without additional buffering.
Is TL7757CLPR compatible with lead-free reflow soldering processes?
Yes - TL7757CLPR uses Sn (tin) lead finish and is rated for standard lead-free reflow profiles. Though TO-92 packages do not carry JEDEC MSL ratings, TI confirms compatibility with peak reflow temperatures up to 260°C per industry-standard Pb-free process guidelines, as documented in TI's packaging addendum for TL7757CLPR.
TL7757CLPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 (TO-226AA) Formed Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-92-3
TL7757CLPR FAQ
1.How can I place an order for TL7757CLPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL7757CLPR 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 TL7757CLPR reliable?
The price and inventory of TL7757CLPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL7757CLPR is usually 5 days.
3.What payment methods are accepted for TL7757CLPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL7757CLPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL7757CLPR?
TL7757CLPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL7757CLPR 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 TL7757CLPR?
For technical support, including TL7757CLPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL7757CLPR requirements.
6.How does Aetrix verify that TL7757CLPR is sourced from the original manufacturer or authorized distributors?
All TL7757CLPR 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 TL7757CLPR meets industry standards.
7.What is the process for return or replacement of TL7757CLPR?
All TL7757CLPR units undergo pre-shipment inspection (PSI). If there is an issue with TL7757CLPR, 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 TL7757CLPR part is unused and in its original packaging.
Return procedure for TL7757CLPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL7757CLPR Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
