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Texas Instruments TLC7705QPWRQ1
- Part No.:
- TLC7705QPWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC7705QPWRQ1.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,804
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Product details
Overview
TLC7705QPWRQ1 from Texas Instruments is an automotive-qualified micropower supply voltage supervisor IC with fixed 4.5 V SENSE threshold, totem-pole RESET/RESET outputs, and programmable delay via external capacitor. It provides power-on reset generation, undervoltage supervision, and static RAM power-down control in microcontroller-based automotive systems.
For engineers reviewing the TLC7705QPWRQ1 datasheet, TLC7705QPWRQ1 pinout, TLC7705QPWRQ1 application, or TLC7705QPWRQ1 equivalent, key selection criteria include its AEC-Q100 qualification, 4.5 V ±3% threshold accuracy over −40°C to 125°C, 16 μA max supply current, totem-pole output drive capability (±2 mA), and support for battery-backed memory retention during main supply failure.
Technical Context
The TLC7705QPWRQ1 implements a precision bandgap-based voltage reference with temperature compensation to maintain stable 4.5 V threshold detection across automotive temperature ranges. Its internal timer generates a user-programmable reset delay (td = 2.1 × 10⁴ × CT) triggered by SENSE voltage crossing VIT−, with hysteresis of 70 mV to prevent chatter near threshold.
It features dual active-high/active-low totem-pole outputs (RESET and RESET), eliminating need for external pull resistors, and includes CONTROL input logic enabling automatic chip-select disable for static RAM during brownout. The RESIN pin allows manual reset assertion independent of supply monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| SENSE Threshold Voltage | 4.5 V ±3% (TLC7705 variant; fixed internal divider; enables reliable 5 V rail supervision) |
| Supply Voltage Range | 2 V to 6 V (supports wide-input automotive power domains including post-buck and battery-supplied subsystems) |
| Max Supply Current | 16 μA at VDD ≥ 2.7 V (enables always-on monitoring in low-power vehicle modules without battery drain) |
| Reset Delay Time | Programmable via CT: td = 2.1 × 10⁴ × CT (e.g., 2.1 ms with 100 nF; ensures robust system initialization timing) |
| Output Drive Strength | ±2 mA at VDD = 4.5 V (directly drives MCU reset pins and memory CS without buffering) |
| Hysteresis | 70 mV (prevents false resets during slow-rising/falling supply transitions) |
| Operating Temperature | −40°C to +125°C (AEC-Q100 Grade 1 qualified for under-hood and infotainment applications) |
Pinout & Package
TSSOP-8 (PW) package, 3.0 mm × 4.4 mm body, 0.65 mm pitch, 1.2 mm max height, RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CONTROL | Power-down enable input | When grounded, configures RESET as active-high for direct connection to SRAM chip select; enables battery-backed memory retention during main supply loss |
| 2 - RESIN | Manual reset input | Active-low asynchronous reset override; asserts RESET/RESET regardless of SENSE voltage or VDD level |
| 3 - CT | Delay timing capacitor connection | External capacitor sets reset timeout duration (td = 2.1 × 10⁴ × CT); no internal timing components required |
| 4 - GND | Ground reference | Common return path for all internal circuitry and output drivers; requires local 0.1 μF ceramic bypass |
| 5 - VDD | Positive supply input | Operates from 2 V to 6 V; RESET asserts when VDD rises above 1 V during power-up |
| 6 - SENSE | Supply monitoring input | Monitors regulated rail (e.g., 5 V); triggers reset when voltage drops below 4.5 V threshold with 70 mV hysteresis |
| 7 - RESET | Active-low reset output | Push-pull totem-pole output; sinks 2 mA at 0.5 V; no external pull-down needed |
| 8 - RESET | Active-high reset output | Complementary topin 7; sources 2 mA at VDD − 0.5 V; supports mixed-logic MCU interfaces |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (−40°C to +125°C), qualified for safety-critical vehicle subsystems |
| Fixed precision threshold | 4.5 V ±3% over full temperature range, eliminating external resistor network calibration |
| Programmable reset delay | Capacitor-set timing (1.1–4.2 ms typical with 100 nF) avoids fixed-delay IC limitations |
| Low-power operation | 16 μA max supply current enables permanent connection to vehicle battery without parasitic drain |
| RAM power-down control | CONTROL pin logic enables automatic SRAM isolation during brownout, preserving data with backup battery |
| Robust output drive | Integrated totem-pole outputs eliminate external pull resistors and reduce BOM count and board space |
Applications
| Engine Control Unit (ECU) Power Monitoring | Infotainment System Reset Management |
|---|---|
|
Use Scenario: Monitors 5 V microcontroller supply rail during cold cranking and load dump events in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Voltage supervisor providing power-on reset and brownout detection; asserts RESET until VDD stabilizes above 4.5 V and delay expires. Use Value: Prevents MCU lockup or undefined state during unstable battery conditions; meets ISO 16750-2 pulse test requirements for automotive electronics. |
Use Scenario: Ensures clean boot sequence and fault recovery in head-unit SoCs after ignition cycling or USB power interruption. IC Role / Device Role / Timing Role: Dual-output supervisor driving both active-low reset and active-high enable lines for SoC and peripheral ICs. Use Value: Eliminates need for discrete RC networks and level shifters; reduces startup jitter and improves system reliability across temperature extremes. |
| ADAS Camera Module Supervision | Body Control Module (BCM) Memory Retention |
|
Use Scenario: Supervises 3.3 V image sensor and ISP power rails in forward-facing camera modules exposed to engine bay thermal stress. IC Role / Device Role / Timing Role: Precision 4.5 V threshold adapted for 5 V intermediate rail; detects upstream regulator failure before downstream 3.3 V LDO collapses. Use Value: Enables early fault detection and graceful shutdown before corrupted image capture; supports ASIL-B functional safety decomposition. |
Use Scenario: Maintains SRAM contents during vehicle sleep mode when main 12 V supply is disconnected but backup battery remains active. IC Role / Device Role / Timing Role: CONTROL pin tied to BCM microcontroller's bank select signal; disables SRAM CS during power loss while maintaining VDD from battery. Use Value: Preserves configuration, odometer, and diagnostic logs without volatile backup capacitors; reduces component count and leakage paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supply voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EB29DBVR | Lower 2.93 V threshold; 3-pin SOT-23; no RESET complement or CONTROL pin | Suitable only for 3.3 V rail supervision; lacks RAM power-down logic and dual outputs | Select when compact size and single-threshold monitoring suffice; not drop-in for TLC7705QPWRQ1's 4.5 V or automotive memory retention use cases |
| MAX6326UT46D3+T | 4.63 V threshold; push-pull RESET only; no CONTROL pin; higher 20 μA quiescent current | Supports basic reset generation but cannot interface with battery-backed SRAM control logic | Choose for cost-sensitive non-automotive applications where AEC-Q100 qualification and dual-output flexibility are unnecessary |
Compared with TLV803EB29DBVR and MAX6326UT46D3+T, the TLC7705QPWRQ1 uniquely combines AEC-Q100 qualification, precise 4.5 V threshold, dual complementary outputs, and dedicated CONTROL logic for battery-backed memory - making it the only option among the three that fully satisfies automotive ECU and ADAS power supervision with data retention requirements.
Availability
TLC7705QPWRQ1 is available at Aetrix Electronics and suitable for automotive engine control units, infotainment head-units, and ADAS camera modules requiring stable component supply with long-term lifecycle assurance.
Supply support for TLC7705QPWRQ1 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 automotive-grade ICs, with decades of experience in high-reliability power management solutions.
The TLC77-Q1 product line was designed specifically for automotive power supply monitoring and reset management, targeting functional safety compliance (ISO 26262-ready architecture) and robust operation in harsh vehicular environments.
FAQ
What is the exact SENSE threshold voltage of the TLC7705QPWRQ1?
The TLC7705QPWRQ1 has a fixed SENSE threshold voltage of 4.5 V, with a tolerance of ±3% over the full operating temperature range (−40°C to +125°C). This value is set by an internal resistor divider and does not require external components. Electrical characteristics tables confirm VIT− = 4.43 V (min), 4.5 V (typ), and 4.63 V (max) at VDD = 2 V to 6 V.
Does the TLC7705QPWRQ1 support battery-backed static RAM retention?
Yes, the TLC7705QPWRQ1 supports battery-backed static RAM retention via its CONTROL pin. When CONTROL is driven low, the RESET output becomes active-high and can directly drive the chip select (CS) of SRAM. This feature is explicitly documented in the Applications section and Figure 10 of the datasheet, enabling automatic memory disable during main supply failure while maintaining VDD from backup battery.
What package type and footprint does the TLC7705QPWRQ1 use?
The TLC7705QPWRQ1 uses the TSSOP-8 (PW) package: 3.0 mm × 4.4 mm body, 0.65 mm lead pitch, 1.2 mm maximum height, with RoHS-compliant NIPDAU lead finish and MSL Level-1 rating. The pin 1 identifier is located in quadrant Q1 per tape-and-reel orientation, and land pattern recommendations are provided in TI's PW0008A package outline.
How is the reset delay time programmed on the TLC7705QPWRQ1?
The reset delay time (td) on the TLC7705QPWRQ1 is programmed using an external capacitor connected to the CT pin. The relationship is defined as td = 2.1 × 10⁴ × CT, where CT is in farads and td is in seconds. For example, a 100 nF capacitor yields td ≈ 2.1 ms (typical), with datasheet-specified range of 1.1–4.2 ms depending on process and temperature.
Is the TLC7705QPWRQ1 AEC-Q100 qualified, and what grade does it meet?
Yes, the TLC7705QPWRQ1 is AEC-Q100 qualified and meets Grade 1 requirements, supporting operation from −40°C to +125°C ambient temperature. This qualification is explicitly stated in the device description, ordering information table, and absolute maximum ratings section of the official Texas Instruments datasheet SGLS208A.
TLC7705QPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
TLC7705QPWRQ1 FAQ
1.How can I place an order for TLC7705QPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC7705QPWRQ1 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 TLC7705QPWRQ1 reliable?
The price and inventory of TLC7705QPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC7705QPWRQ1 is usually 5 days.
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4.How is shipping managed for TLC7705QPWRQ1?
TLC7705QPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC7705QPWRQ1 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 TLC7705QPWRQ1?
For technical support, including TLC7705QPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC7705QPWRQ1 requirements.
6.How does Aetrix verify that TLC7705QPWRQ1 is sourced from the original manufacturer or authorized distributors?
All TLC7705QPWRQ1 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 TLC7705QPWRQ1 meets industry standards.
7.What is the process for return or replacement of TLC7705QPWRQ1?
All TLC7705QPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TLC7705QPWRQ1, 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 TLC7705QPWRQ1 part is unused and in its original packaging.
Return procedure for TLC7705QPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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