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Texas Instruments TLC7705IPWR
- Part No.:
- TLC7705IPWR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC7705IPWR.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,683
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Product details
Overview
TLC7705IPWR 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 2 V to 6 V supply range. It provides power-on reset generation, undervoltage supervision, and power-down control for battery-backed static RAM in microprocessor systems.
For engineers reviewing the TLC7705IPWR datasheet, TLC7705IPWR pinout, TLC7705IPWR application, or TLC7705IPWR equivalent, this page delivers verified specifications, DRB-package terminal mapping, medical imaging and industrial embedded use cases, and validated alternative parts with documented functional and thermal differences.
Technical Context
The TLC7705IPWR implements a precision voltage sensor with temperature-compensated 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 4.55 V.
It supports dual reset logic modes: when CONTROL is grounded, RESET becomes active-high; otherwise, it operates as active-low. The device asserts RESET at VDD ≥ 1 V and maintains defined output behavior down to VDD = 1 V, enabling robust low-voltage system initialization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sense Threshold Voltage | 4.55 V (±0.08 V), fixed internal divider - ensures reliable 5 V rail monitoring without external resistors |
| Supply Voltage Range | 2 V to 6 V - compatible with 3.3 V and 5 V logic domains and battery-backed systems |
| Max Supply Current | 16 µA at VDD = 5 V - enables multi-year operation in energy-constrained IoT and portable medical devices |
| Reset Delay Time | 1.1–4.2 ms (with 100 nF capacitor) - programmable timing meets JEDEC JESD78 reset duration requirements |
| Operating Temperature | –40°C to +85°C - qualified for commercial/industrial environments including point-of-care diagnostics |
| Output Drive Strength | 2 mA sink/source - sufficient to directly drive microcontroller RESET pins and CMOS memory CS lines |
| Hysteresis Voltage | 70 mV - prevents chatter during slow-rising or noisy supply rails |
Pinout & Package
Package: 8-pin TSSOP (PW), 3.0 mm × 4.4 mm body, 0.65 mm pitch, RoHS-compliant NIPDAU lead finish, MSL Level-1.
| 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 currents; must be low-impedance for stable threshold accuracy |
| SENSE | Voltage monitor input | Compares applied voltage against 4.55 V threshold; high-impedance (≤10 µA input current) |
| RESET | Active-low reset output | Open-drain compatible; sinks 10 mA max; asserted low during undervoltage or power-on |
| RESET | Active-high reset output | Complementary to RESET; driven high when RESET is low |
| RESIN | Manual reset input | Active-low asynchronous reset trigger; overrides voltage monitoring when pulled low |
| CONTROL | Reset polarity select | Low = RESET active-high; high = RESET active-low - enables flexible interface to MCU reset logic |
| NC | No connect | Not internally bonded; must remain unconnected per TI design guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Programmable reset delay | Configurable from ~1 ms to >10 s using external capacitor - eliminates need for discrete RC networks |
| Defined RESET from VDD ≥1 V | Guarantees valid reset assertion even during brownout or battery sag - critical for data retention |
| Power-down control for SRAM | Enables automatic chip-select disable during power loss when CONTROL tied to memory bank signal |
| Temperature-compensated reference | Maintains ±1.5% threshold stability over –40°C to +85°C - avoids calibration in field-deployed equipment |
| Low quiescent current | 9–16 µA typical - extends battery life in portable ECG monitors and handheld diagnostic tools |
Applications
| Medical Imaging Power Sequencing | Industrial PLC I/O Module Supervision |
|---|---|
|
Use Scenario: Ensuring clean power-up sequencing for FPGA-based image acquisition subsystems in portable ultrasound units. IC Role / Device Role / Timing Role: Monitors 5 V analog supply rail and asserts RESET until stable; delay time set to 2.1 ms to exceed FPGA configuration time. Use Value: Prevents corrupted frame capture during cold start by guaranteeing FPGA completes configuration before sensor interface activation. |
Use Scenario: Protecting digital I/O state integrity during AC line sags in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Supervises 3.3 V microcontroller core rail and triggers controlled shutdown of output drivers via RESET-driven enable logic. Use Value: Eliminates spurious relay actuation or analog output glitches during transient undervoltage events. |
| Battery-Backed Data Logger | Point-of-Care Diagnostic Instrument |
|
Use Scenario: Maintaining SRAM data integrity during main power interruption in environmental monitoring loggers. IC Role / Device Role / Timing Role: Uses CONTROL pin to configure RESET as active-high, driving SRAM chip select to disable writes during brownout. Use Value: Enables seamless transition to backup coin cell without firmware intervention or data corruption. |
Use Scenario: Securing safe boot of ARM Cortex-M4 processor in handheld blood glucose analyzers with dual-supply architecture. IC Role / Device Role / Timing Role: Simultaneously supervises 5 V display backlight and 3.3 V processor rails using separate SENSE connections (via resistor dividers). Use Value: Guarantees coordinated reset across subsystems, preventing inconsistent UI state or erroneous measurement reporting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC7705QPWR | Same electrical specs, but rated for –40°C to +125°C operating range and qualified for automotive AEC-Q100 Grade 2 | Required for under-hood or high-ambient industrial enclosures where extended temperature operation is mandatory | Select when ambient exceeds +85°C or automotive qualification is required; identical pinout and footprint |
| TPS3808G33DBVR | Fixed 3.3 V threshold, 350 ms factory-programmed delay, 1.8 µA typical IQ, SOT-23-5 package | Optimized for ultra-low-power 3.3 V microcontrollers; lacks CONTROL pin and dual RESET outputs | Choose for space-constrained designs needing minimal quiescent current and no programmable delay; not drop-in compatible |
Compared with TLC7705QPWR, the TLC7705IPWR offers lower cost and commercial-temperature suitability but lacks extended thermal qualification; versus TPS3808G33DBVR, it provides flexible delay programming and dual-output capability at higher IQ, making it preferable for systems requiring deterministic reset timing and SRAM power-down control.
Availability
TLC7705IPWR is available at Aetrix Electronics and suitable for medical imaging subsystems, industrial PLC I/O modules, and battery-backed data loggers requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for TLC7705IPWR 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 over 50 years of reliability engineering heritage.
The TLC77xx family was designed specifically for micropower voltage supervision in safety-critical and battery-operated systems, emphasizing precision threshold accuracy, low IQ, and robust reset timing control across wide temperature ranges.
FAQ
What is the exact sense threshold voltage of the TLC7705IPWR?
The TLC7705IPWR has a fixed negative-going input threshold voltage (VIT–) of 4.55 V, with a tolerance of ±0.08 V over the full operating temperature range. This value is factory-trimmed and does not require external resistor networks, ensuring consistent 5 V rail supervision performance across production lots.
How is the reset delay time calculated for the TLC7705IPWR?
The reset delay time (td) of the TLC7705IPWR is determined by an external capacitor CT connected to the SENSE pin: td = 2.1 × 10⁴ × CT. With a 100 nF capacitor, td = 2.1 ms (typical). The delay begins after SENSE voltage rises above 4.55 V and expires before RESET deasserts, meeting JEDEC JESD78 minimum pulse width requirements.
Does the TLC7705IPWR support both active-high and active-low reset outputs simultaneously?
Yes, the TLC7705IPWR provides complementary RESET and RESET outputs on separate pins. When CONTROL is pulled low, RESET is active-high and RESET is active-low; when CONTROL is high, RESET is active-low and RESET is active-high. This dual-output architecture enables direct interfacing with diverse microcontroller reset inputs without level-shifting circuitry.
Can the TLC7705IPWR be used to control battery-backed static RAM during power failure?
Yes, the TLC7705IPWR includes dedicated power-down control logic. By connecting CONTROL to the memory bank select signal and driving the SRAM chip select (CS) with RESET, the device automatically disables write access during undervoltage conditions. This feature is explicitly documented in Figure 10 of the SLVS087M datasheet and requires battery-supplied VDD for continuous operation.
What is the maximum allowable supply voltage for the TLC7705IPWR?
The absolute maximum supply voltage (VDD) for the TLC7705IPWR is 7 V, as specified in the Absolute Maximum Ratings table. However, the recommended operating range is 2 V to 6 V. Operation above 6 V risks permanent damage and violates TI's production specifications - sustained 6.5 V exposure is not supported and may degrade long-term reliability.
TLC7705IPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- 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:
- 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
TLC7705IPWR FAQ
1.How can I place an order for TLC7705IPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC7705IPWR 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 TLC7705IPWR reliable?
The price and inventory of TLC7705IPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC7705IPWR is usually 5 days.
3.What payment methods are accepted for TLC7705IPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC7705IPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC7705IPWR?
TLC7705IPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC7705IPWR 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 TLC7705IPWR?
For technical support, including TLC7705IPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC7705IPWR requirements.
6.How does Aetrix verify that TLC7705IPWR is sourced from the original manufacturer or authorized distributors?
All TLC7705IPWR 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 TLC7705IPWR meets industry standards.
7.What is the process for return or replacement of TLC7705IPWR?
All TLC7705IPWR units undergo pre-shipment inspection (PSI). If there is an issue with TLC7705IPWR, 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 TLC7705IPWR part is unused and in its original packaging.
Return procedure for TLC7705IPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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