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Texas Instruments TLC7705IPWG4
- Part No.:
- TLC7705IPWG4
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC7705IPWG4.pdf
- Description:
- IC 4.55V SUPPLY MONITOR 8-TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:600
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Product details
Overview
TLC7705IPWG4 from Texas Instruments is a micropower supply voltage supervisor IC with fixed 4.55 V sense threshold, active-low RESET output, programmable delay via external capacitor, and operation across –40°C to 85°C. It provides power-on reset generation, undervoltage supervision, and power-down control for static RAM with battery backup in microprocessor systems.
For engineers reviewing the TLC7705IPWG4 datasheet, TLC7705IPWG4 pinout, TLC7705IPWG4 application, or TLC7705IPWG4 equivalent, this page delivers verified specifications, package mapping, functional context, and real-world use cases - all grounded in TI's SLVS087M datasheet and official packaging documentation.
Technical Context
The TLC7705IPWG4 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 delay (td = 2.1 × 10⁴ × CT) after SENSE voltage recovers above 4.55 V before deasserting RESET.
It supports dual-mode reset control: standard undervoltage monitoring on SENSE, and optional power-down coordination via CONTROL input tied to memory bank select signals. RESET remains defined down to VDD ≥ 1 V, enabling reliable initialization even during brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sense Threshold Voltage | 4.55 V ±0.08 V - precise fixed threshold for 5-V system supply monitoring |
| Supply Voltage Range | 2 V to 6 V - supports wide-input industrial and battery-backed systems |
| Max Supply Current | 16 µA at VDD = 5 V - enables ultra-low-power operation in always-on supervisory circuits |
| Reset Delay Time | Programmable via external CT (e.g., 2.1 ms with 100 nF) - ensures robust system initialization timing |
| Operating Temperature | –40°C to +85°C - qualified for commercial and industrial ambient environments |
| Output Drive | Totem-pole RESET with VOL ≤ 0.5 V @ 2 mA - directly interfaces with CMOS logic inputs |
| Hysteresis | 70 mV - prevents chatter during slow-rising/falling supply transitions |
Pinout & Package
Package: 8-pin TSSOP (PW), 3.0 mm × 4.4 mm, 0.65 mm pitch, RoHS-compliant NIPDAU lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Return path for all internal circuitry and output drivers |
| VDD | Power supply input | Supplies internal reference, comparator, and output stage; valid from 2 V to 6 V |
| SENSE | Voltage monitor input | Compares applied voltage against 4.55 V internal threshold; high-impedance (≤10 µA input current) |
| CONTROL | Mode selection input | When tied to GND, configures RESET as active-high for RAM power-down control |
| RESIN | Manual reset input | Active-low asynchronous reset override; pulls RESET low when asserted |
| RESET | Active-low reset output | Open-drain/totem-pole output (per variant); asserts low during power-up or undervoltage |
| RESET | Active-high reset output | Complementary output to RESET; synchronized and inverted by internal logic |
| NC | No connect | Pin 8 is unconnected - no internal bond wire or circuit connection |
Key Features
| Feature | Design Value |
|---|---|
| Power-on reset generator | Asserts RESET at VDD ≥ 1 V - ensures CPU/MCU reset before core logic becomes operational |
| Programmable delay time | Configurable via external capacitor (td = 2.1 × 10⁴ × CT) - eliminates need for external timers or RC networks |
| Temperature-compensated reference | Stable 4.55 V threshold over –40°C to +85°C - avoids calibration drift in varying thermal environments |
| Defined RESET from VDD ≥ 1 V | Guaranteed output state during brownout - prevents undefined logic states in downstream circuitry |
| Power-down control support | Enables automatic CS disable of battery-backed SRAM during power loss - preserves data integrity |
Applications
| Medical Imaging Power Sequencing | Industrial PLC Controller Reset |
|---|---|
|
Use Scenario: Ensuring clean power-up sequencing for FPGA-based image acquisition modules in MRI and CT scanners. IC Role / Device Role / Timing Role: Supervises 5-V analog front-end and digital processing rails; triggers FPGA configuration reset only after stable supply. Use Value: Prevents metastability and corrupted image data by enforcing minimum 2.1-ms delay (with 100-nF CT) before releasing reset. |
Use Scenario: Reliable restart of programmable logic controllers after AC line interruption or brownout. IC Role / Device Role / Timing Role: Monitors 5-V system rail; asserts RESET during undervoltage and holds it until recovery + delay expires. Use Value: Eliminates spurious I/O toggling and firmware crashes by guaranteeing >1.1 ms reset pulse width under worst-case conditions. |
| Battery-Backed Data Logger | Automotive Infotainment MCU Boot |
|
Use Scenario: Maintaining SRAM data integrity during main power failure in environmental monitoring loggers. IC Role / Device Role / Timing Role: Uses CONTROL input to disable memory chip select (CS) when VDD drops below 4.55 V. Use Value: Enables seamless transition to battery backup without software intervention - critical for zero-data-loss logging. |
Use Scenario: Validating 5-V domain stability before booting infotainment SoC in automotive head units. IC Role / Device Role / Timing Role: Acts as primary power-good signal generator for PMIC sequencing and bootloader enable. Use Value: Meets AEC-Q100 Class 2 thermal requirements (–40°C to +85°C) and supports <16 µA quiescent current for low-standby designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC7705IPWR | Same electrical specs and pinout; tape-and-reel packaging (2000 pcs) vs. tube (150 pcs) for TLC7705IPWG4 | Identical function; optimized for automated SMT assembly rather than manual prototyping | Select TLC7705IPWR for volume production; TLC7705IPWG4 suits evaluation and low-volume builds |
| TPS3808G33DBVR | 3.3-V fixed threshold, 350-ms factory-programmed delay, 1.4-µA quiescent current, SOT-23-6 package | Lower IQ and smaller footprint but incompatible threshold and non-programmable delay - unsuitable for 5-V systems requiring adjustable timing | Choose only if redesigning for 3.3-V rail and accepting fixed delay; not a drop-in replacement for TLC7705IPWG4 |
Compared with TLC7705IPWR, TLC7705IPWG4 offers identical supervision functionality in tube packaging for flexibility in small-batch use; versus TPS3808G33DBVR, it provides higher threshold accuracy, programmable delay, and proven reliability in legacy 5-V industrial designs - making it irreplaceable where timing control and voltage level match are mandatory.
Availability
TLC7705IPWG4 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 and long-term manufacturability.
Supply support for TLC7705IPWG4 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 performance.
The TLC77xx family was designed specifically for micropower supply supervision in microcomputer and microprocessor systems - prioritizing low IQ, precise thresholds, and robust reset timing in harsh or battery-constrained environments.
FAQ
What is the exact sense threshold voltage of the TLC7705IPWG4?
The TLC7705IPWG4 has a fixed negative-going input threshold voltage (VIT–) of 4.55 V, with a tolerance of ±0.08 V over its full operating temperature range (–40°C to +85°C). This value is internally trimmed and specified in the Electrical Characteristics table of the SLVS087M datasheet under "TLC7705" row. The device uses a temperature-compensated voltage reference to maintain stability across operating conditions.
Does the TLC7705IPWG4 support active-high reset output?
Yes, the TLC7705IPWG4 provides both active-low RESET and active-high RESET outputs. These complementary signals are internally generated and synchronized. The RESET output goes low during power-up or undervoltage events, while RESET goes high simultaneously - enabling direct interface with either polarity logic families without external inverters.
How is the reset delay time set on the TLC7705IPWG4?
The reset delay time (td) on the TLC7705IPWG4 is set externally using a capacitor (CT) connected between the CT pin and GND. The relationship is td = 2.1 × 10⁴ × CT, where CT is in farads and td is in seconds. For example, a 100 nF capacitor yields a typical delay of 2.1 ms. This programmability allows precise tailoring of reset hold time without firmware or additional components.
Can the TLC7705IPWG4 be used in battery-backed SRAM applications?
Yes, the TLC7705IPWG4 explicitly supports power-down control for static RAM with battery backup. When the CONTROL pin is tied to GND, the RESET output becomes active-high and can drive the chip select (CS) line of SRAM. During main power loss, the device disables memory access automatically - preserving data integrity without processor involvement or additional logic.
What is the maximum supply current of the TLC7705IPWG4?
The maximum supply current (IDD) of the TLC7705IPWG4 is 16 µA at VDD = 5 V and TA = 25°C, as specified in the Electrical Characteristics table. This ultra-low quiescent current enables continuous supervision in battery-powered or energy-sensitive systems without significant impact on standby power budget.
TLC7705IPWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.55V
- 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-TSSOP
TLC7705IPWG4 FAQ
1.How can I place an order for TLC7705IPWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC7705IPWG4 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 TLC7705IPWG4 reliable?
The price and inventory of TLC7705IPWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC7705IPWG4 is usually 5 days.
3.What payment methods are accepted for TLC7705IPWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC7705IPWG4 transactions.
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4.How is shipping managed for TLC7705IPWG4?
TLC7705IPWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC7705IPWG4 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 TLC7705IPWG4?
For technical support, including TLC7705IPWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC7705IPWG4 requirements.
6.How does Aetrix verify that TLC7705IPWG4 is sourced from the original manufacturer or authorized distributors?
All TLC7705IPWG4 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 TLC7705IPWG4 meets industry standards.
7.What is the process for return or replacement of TLC7705IPWG4?
All TLC7705IPWG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLC7705IPWG4, 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 TLC7705IPWG4 part is unused and in its original packaging.
Return procedure for TLC7705IPWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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