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Texas Instruments TLC7705QPWR
- Part No.:
- TLC7705QPWR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC7705QPWR.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,052
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Product details
Overview
TLC7705QPWR 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 over –40°C to 125°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 TLC7705QPWR datasheet, TLC7705QPWR pinout, TLC7705QPWR application, or TLC7705QPWR equivalent, this page delivers verified specifications, package details, functional context, real-world use cases, and validated alternative options for industrial and automotive embedded designs requiring reliable reset control under wide temperature and low-power constraints.
Technical Context
The TLC7705QPWR monitors the SENSE input against a precision, temperature-compensated 4.55 V threshold (±2% typical) and asserts RESET when voltage drops below it. An internal timer delays RESET deassertion by td = 2.1 × 10⁴ × CT seconds, where CT is an external capacitor.
It supports dual reset modes: standard undervoltage supervision and CONTROL-pin-enabled power-down mode for battery-backed SRAM. RESET is defined down to VDD ≥ 1 V, and supply current remains ≤16 µA across 2–6 V operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sense Threshold Voltage | 4.55 V ±0.08 V - Fixed internal reference ensures accurate 5 V rail monitoring without external resistors. |
| Supply Voltage Range | 2 V to 6 V - Supports operation across 3.3 V and 5 V systems, including brownout conditions. |
| Max Supply Current | 16 µA at VDD = 5 V - Enables ultra-low-power supervision in battery-critical applications. |
| Reset Delay Time | Programmable via external CT (e.g., 100 nF → ~2.1 ms) - Provides design flexibility for system stabilization timing. |
| Operating Temperature | –40°C to +125°C - Qualified for under-hood automotive and industrial environments. |
| Output Type | Active-low totem-pole RESET - Drives logic inputs directly without pull-up; sinks 2 mA minimum. |
| Hysteresis | 70 mV - Prevents chatter during slow-rising/falling supply transitions near threshold. |
Pinout & Package
TLC7705QPWR is housed in an 8-pin TSSOP (PW) package, 3.0 mm × 4.4 mm, 0.65 mm pitch, RoHS-compliant, with moisture sensitivity level (MSL) 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Return path for all internal circuitry and output drivers; must be low-impedance. |
| VDD | Positive supply input | Power source (2–6 V); RESET is valid down to 1 V, enabling early power-on assertion. |
| SENSE | Voltage monitor input | Connects to monitored rail; internal comparator triggers RESET when voltage falls below 4.55 V. |
| CONTROL | Mode selection input | Low = active-high RESET; high = enables SRAM power-down logic for battery backup. |
| RESIN | Manual reset input | Active-low asynchronous reset override; pulls RESET low regardless of SENSE state. |
| RESET | Active-low reset output | Drives microcontroller /CSPIN or reset line; totem-pole structure eliminates need for external pull-up. |
| NC | No connect | Pins 1 and 8 are unconnected; no internal connection or function. |
| NC | No connect | Pins 1 and 8 are unconnected; no internal connection or function. |
Key Features
| Feature | Design Value |
|---|---|
| Power-on reset generator | Asserts RESET at VDD ≥ 1 V - Ensures clean initialization before core logic powers up. |
| Temperature-compensated reference | Stable 4.55 V threshold over –40°C to 125°C - Eliminates calibration drift in harsh environments. |
| Programmable delay time | External capacitor sets td from microseconds to seconds - Matches system-specific boot timing requirements. |
| SRAM power-down support | CONTROL pin enables automatic chip-select disable during power loss - Preserves data in battery-backed memory. |
| Micropower operation | 16 µA max IDD - Extends battery life in portable and remote sensing applications. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors 5 V MCU supply in programmable logic controllers exposed to wide ambient temperatures and voltage transients. IC Role / Device Role / Timing Role: Voltage supervisor providing power-on reset and brownout detection with 4.55 V threshold and 2.1 ms delay (CT = 100 nF). Use Value: Guarantees deterministic MCU startup and prevents erratic behavior during grid fluctuations or cold cranking. |
Use Scenario: Supervises 5 V domain powering microcontrollers and CAN transceivers in body electronics modules. IC Role / Device Role / Timing Role: Resets safety-critical subsystems on undervoltage; CONTROL pin disables non-essential loads during battery sag. Use Value: Meets AEC-Q100 Grade 1 thermal requirements and supports fail-safe shutdown without firmware intervention. |
| Medical Imaging Power Sequencer | Energy Meter with Backup RAM |
Use Scenario: Ensures proper sequencing of high-voltage detector bias rails and digital processing cores in portable ultrasound units. IC Role / Device Role / Timing Role: Generates synchronized reset pulses across multiple voltage domains using shared SENSE monitoring and programmable delay. Use Value: Prevents latch-up and data corruption during rapid power cycling common in handheld diagnostic equipment. |
Use Scenario: Maintains integrity of tariff and consumption data stored in battery-backed SRAM during mains failure. IC Role / Device Role / Timing Role: Uses CONTROL pin to assert RESET and disable memory CS during VDD drop, preserving volatile data. Use Value: Enables zero-data-loss power-down with <16 µA quiescent current, extending backup battery life beyond 10 years. |
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; requires external pull-up on open-drain RESET. | Optimized for ultra-low-power 3.3 V systems; lacks CONTROL pin for SRAM power-down. | Select when lowest possible IQ is critical and SRAM retention is not required. |
| MAX6326UT46D3+T | 4.63 V threshold; ±1.5% accuracy; 12 µA IQ; push-pull RESET; no CONTROL pin. | Higher threshold tolerance and lower IQ than TLC7705QPWR, but no battery-backup enable logic. | Choose for tighter threshold accuracy and reduced supply current in 5 V systems without SRAM control needs. |
Compared with TPS3808G33DBVR and MAX6326UT46D3+T, the TLC7705QPWR uniquely integrates SRAM power-down control and operates across the full –40°C to 125°C range with proven robustness in automotive and industrial reset circuits-making it the preferred choice where data retention during power loss is mandatory.
Availability
TLC7705QPWR is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical instrumentation requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for TLC7705QPWR 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 TLC77xx family was designed specifically for micropower voltage supervision in microcomputer and microprocessor systems-prioritizing low IQ, wide temperature operation, and integrated power-down control for battery-backed memory.
FAQ
What is the exact sense threshold voltage of the TLC7705QPWR?
The TLC7705QPWR has a fixed negative-going input threshold voltage (VIT–) of 4.55 V, with typical tolerance ±0.08 V (±1.7%) over the full operating temperature range. This value is factory-trimmed and does not require external resistor networks, making it ideal for precise 5 V rail monitoring in the TLC7705QPWR application.
Does the TLC7705QPWR support battery-backed SRAM power-down functionality?
Yes, the TLC7705QPWR supports SRAM power-down via its CONTROL pin. When CONTROL is driven high, the device configures RESET to act as an active-high signal that can drive the chip select (CS) of static RAM, automatically disabling memory access during power loss-provided the TLC7705QPWR itself is powered from the backup source.
What is the maximum supply current of the TLC7705QPWR at 5 V?
The TLC7705QPWR draws a maximum supply current (IDD) of 16 µA at VDD = 5 V and TA = 25°C, with typical values as low as 9 µA. This micropower performance is maintained across the full –40°C to 125°C operating range, confirming its suitability for always-on monitoring in the TLC7705QPWR design.
Can the reset delay time of the TLC7705QPWR be adjusted, and how?
Yes, the reset delay time (td) of the TLC7705QPWR is fully programmable using an external capacitor (CT) connected between the CT pin and GND. The relationship is td = 2.1 × 10⁴ × CT seconds-for example, a 100 nF capacitor yields ~2.1 ms delay. No resistor is needed, simplifying the TLC7705QPWR timing configuration.
What package type and pin count does the TLC7705QPWR use?
The TLC7705QPWR uses an 8-pin TSSOP (PW) package, measuring 3.0 mm × 4.4 mm with 0.65 mm lead pitch. It is RoHS-compliant, rated MSL-1, and supplied in tape-and-reel format (2000 units per reel), matching the packaging specification explicitly stated for the TLC7705QPWR ordering variant.
TLC7705QPWR 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
TLC7705QPWR FAQ
1.How can I place an order for TLC7705QPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC7705QPWR 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 TLC7705QPWR reliable?
The price and inventory of TLC7705QPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC7705QPWR is usually 5 days.
3.What payment methods are accepted for TLC7705QPWR?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC7705QPWR?
TLC7705QPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC7705QPWR 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 TLC7705QPWR?
For technical support, including TLC7705QPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC7705QPWR requirements.
6.How does Aetrix verify that TLC7705QPWR is sourced from the original manufacturer or authorized distributors?
All TLC7705QPWR 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 TLC7705QPWR meets industry standards.
7.What is the process for return or replacement of TLC7705QPWR?
All TLC7705QPWR units undergo pre-shipment inspection (PSI). If there is an issue with TLC7705QPWR, 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 TLC7705QPWR part is unused and in its original packaging.
Return procedure for TLC7705QPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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