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Texas Instruments TLC7705QPWRG4
- Part No.:
- TLC7705QPWRG4
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC7705QPWRG4.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,174
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Product details
Overview
TLC7705QPWRG4 from Texas Instruments is a micropower supply voltage supervisor IC with fixed 4.55 V negative-going sense threshold, active-low RESET output, programmable delay via external capacitor, and operation across –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 TLC7705QPWRG4 datasheet, TLC7705QPWRG4 pinout, TLC7705QPWRG4 application, or TLC7705QPWRG4 equivalent, this page delivers verified electrical specs, DRB-package terminal mapping, real-world use cases in industrial control and medical imaging, and validated alternative parts with documented functional differences.
Technical Context
The TLC7705QPWRG4 integrates a precision temperature-compensated voltage reference, internal timer for reset delay (td = 2.1 × 10⁴ × CT), and totem-pole output stage enabling defined RESET assertion down to VDD ≥1 V. Its SENSE input monitors supply rail voltage against a fixed 4.55 V threshold with 70 mV hysteresis.
It supports dual-mode reset control: standard undervoltage detection and CONTROL-pin-enabled power-down mode for static RAM retention during brownout. The device draws only 9–16 µA quiescent current and maintains valid outputs over 2 V to 6 V supply range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sense Threshold Voltage | 4.55 V (fixed, negative-going; ensures reliable reset at nominal 5 V rail) |
| Supply Voltage Range | 2 V to 6 V (supports 3.3 V and 5 V systems without level-shifting) |
| Quiescent Supply Current | 9–16 µA (enables long-life battery-backed applications) |
| Reset Delay Time | Programmable via external capacitor (td = 2.1 × 10⁴ × CT; e.g., 2.1 ms with 100 nF) |
| Operating Temperature | –40°C to 125°C (Q-grade qualification for automotive and industrial environments) |
| Output Type | Active-low totem-pole RESET (drives loads directly; no pull-up required) |
| Hysteresis | 70 mV (prevents chatter near threshold during slow supply ramp or noise) |
Pinout & Package
Package: 8-pin 3×3 mm SON (DRB) - thermally enhanced, leadless, RoHS-compliant surface-mount package optimized for space-constrained industrial and medical designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply input | Power source for internal circuitry; must be bypassed with 0.1 µF ceramic capacitor |
| GND | Ground reference | Common return path for all currents; low-impedance connection critical for noise immunity |
| SENSE | Voltage monitoring input | Connects to monitored rail; asserts RESET when voltage falls below 4.55 V |
| RESET | Active-low reset output | Drives microcontroller / processor reset pin; sinks up to 10 mA |
| CONTROL | Power-down mode select | Low = enables RAM retention mode; high = standard reset operation |
| RESIN | Manual reset input | Active-low asynchronous reset override; pulls RESET low when asserted |
| NC | No connect | Pin 1 and Pin 8 are unconnected; must remain floating or grounded per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Power-on reset generator | Asserts RESET at VDD ≥1 V, ensuring clean initialization before logic becomes active |
| Programmable reset delay | External capacitor sets delay time (1.1–4.2 ms typical), eliminating need for discrete timing components |
| Temperature-compensated reference | Stable 4.55 V threshold over –40°C to 125°C, minimizing calibration drift in harsh environments |
| Battery-backed RAM support | CONTROL pin enables automatic chip-select disable during power loss, preserving data in static CMOS RAM |
| Micropower operation | Max 16 µA supply current allows integration into always-on, energy-sensitive subsystems |
Applications
| Industrial PLC Controller | Medical Imaging Power Sequencing |
|---|---|
|
Use Scenario: Monitors 5 V main supply in programmable logic controller CPU module during cold start and brownout events. IC Role / Device Role / Timing Role: Voltage supervisor providing power-on reset and undervoltage lockout with 4.55 V threshold aligned to 5 V rail tolerance. Use Value: Prevents firmware execution under marginal voltage, avoiding corrupted I/O states and communication faults in field-deployed equipment. |
Use Scenario: Ensures deterministic reset of FPGA-based image acquisition subsystem during MRI scanner power cycling. IC Role / Device Role / Timing Role: Supervises auxiliary 3.3 V supply while coordinating battery-backed SRAM retention via CONTROL pin. Use Value: Guarantees zero-data-loss power-down sequence compliant with IEC 62304 safety requirements for Class C medical devices. |
| Automotive Body Control Module | Energy Metering Data Logger |
|
Use Scenario: Supervises 5 V microcontroller supply in body electronics unit exposed to load-dump and cold-crank conditions. IC Role / Device Role / Timing Role: Provides extended temperature operation (–40°C to 125°C) and hysteresis-stabilized reset signaling. Use Value: Eliminates spurious resets during transient voltage dips, improving system robustness per AEC-Q100 Grade 2 requirements. |
Use Scenario: Maintains integrity of flash memory writes during AC mains interruption in smart electricity meters. IC Role / Device Role / Timing Role: Triggers controlled shutdown and enables SRAM data hold using battery-backed power path. Use Value: Enables >10-year nonvolatile data retention without supercapacitor or EEPROM wear-out concerns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB29DBVR | Fixed 2.93 V threshold; 350 nA IQ; SOT-23-3 package; no CONTROL or RESIN pins | Limited to single-threshold monitoring; no RAM retention or manual reset capability | Select when ultra-low power and minimal footprint outweigh feature set requirements |
| TPS3808G33DBVR | Adjustable threshold (via resistor divider); 1.6 µA IQ; 200 ms fixed delay; open-drain output | Requires external pull-up; lacks CONTROL pin for battery-backup coordination | Choose for flexible threshold tuning and lowest quiescent current in non-RAM applications |
Compared with TLV803EB29DBVR and TPS3808G33DBVR, the TLC7705QPWRG4 uniquely combines fixed 4.55 V supervision, integrated RAM power-down control, manual reset input, and totem-pole output-making it irreplaceable in legacy 5 V microcontroller systems requiring deterministic, feature-rich reset management.
Availability
TLC7705QPWRG4 is available at Aetrix Electronics and suitable for industrial control systems, medical imaging equipment, and automotive body electronics requiring stable component supply with guaranteed long-term availability and Q-grade temperature compliance.
Supply support for TLC7705QPWRG4 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 company delivering analog and embedded processing solutions with leadership in power management, signal chain, and microcontrollers.
The TLC77xx family was designed specifically for robust, low-power supply monitoring in microcomputer and microprocessor systems-emphasizing reliability across extended temperature ranges and compatibility with battery-backed memory architectures.
FAQ
What is the exact sense threshold voltage of the TLC7705QPWRG4?
The TLC7705QPWRG4 has a fixed negative-going input threshold voltage (VIT–) of 4.55 V, with a typical tolerance of ±0.08 V (4.47 V to 4.63 V) over the full operating temperature and supply range. This value is factory-trimmed and does not require external resistors, distinguishing it from the adjustable TLC7701 variant.
Does the TLC7705QPWRG4 support battery-backed static RAM retention?
Yes, the TLC7705QPWRG4 supports battery-backed static RAM retention via its CONTROL pin. When CONTROL is driven low, the RESET output transitions to active-high behavior and coordinates with memory bank select signals to disable chip select during power failure-enabling seamless data retention as documented in Figure 10 of the SLVS087M datasheet.
What package type and pin count does the TLC7705QPWRG4 use?
The TLC7705QPWRG4 uses the 8-pin SON (Small Outline No-lead) DRB package-a 3 mm × 3 mm, 0.5 mm pitch, leadless surface-mount package with thermal pad. It is RoHS-compliant, rated for moisture sensitivity level 1, and features exposed thermal pad for improved power dissipation in high-reliability applications.
How is the reset delay time configured on the TLC7705QPWRG4?
The reset delay time (td) on the TLC7705QPWRG4 is configured using an external capacitor 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 ~2.1 ms delay, as verified in the Switching Characteristics table of the SLVS087M datasheet.
What is the minimum supply voltage required for the TLC7705QPWRG4 to assert RESET?
The TLC7705QPWRG4 asserts RESET when VDD reaches 1 V-guaranteeing defined reset behavior even during very slow power ramps. This "power-up reset voltage" (Vres) is specified with IOL = 20 µA and ensures microcontroller core logic remains held in reset until sufficient supply headroom exists for reliable operation.
TLC7705QPWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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
TLC7705QPWRG4 FAQ
1.How can I place an order for TLC7705QPWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC7705QPWRG4 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 TLC7705QPWRG4 reliable?
The price and inventory of TLC7705QPWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC7705QPWRG4 is usually 5 days.
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Once your TLC7705QPWRG4 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 TLC7705QPWRG4?
For technical support, including TLC7705QPWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC7705QPWRG4 requirements.
6.How does Aetrix verify that TLC7705QPWRG4 is sourced from the original manufacturer or authorized distributors?
All TLC7705QPWRG4 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 TLC7705QPWRG4 meets industry standards.
7.What is the process for return or replacement of TLC7705QPWRG4?
All TLC7705QPWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLC7705QPWRG4, 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 TLC7705QPWRG4 part is unused and in its original packaging.
Return procedure for TLC7705QPWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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