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Texas Instruments TLC7705IPE4
- Part No.:
- TLC7705IPE4
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TLC7705IPE4.pdf
- Description:
- VOLTAGE SUPERVISOR WITH PROGRAMM
- Quantity:
- Payment:
- Shipping:
Inventory:3,219
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Product details
Overview
TLC7705IPE4 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 TLC7705IPE4 datasheet, TLC7705IPE4 pinout, TLC7705IPE4 application, or TLC7705IPE4 equivalent, this device is selected for low-current (≤16 µA) reset supervision in space-constrained industrial controllers, medical instrumentation, and battery-backed memory retention circuits where precise 4.55 V threshold detection and defined reset timing are required.
Technical Context
The TLC7705IPE4 integrates a precision temperature-compensated voltage reference, internal timer for reset delay (td = 2.1 × 10⁴ × CT), and totem-pole output stage. Its SENSE input monitors system supply voltage against a factory-trimmed 4.55 V threshold with 70 mV hysteresis to prevent chatter during brownout recovery.
It supports dual-mode reset assertion: power-up reset activates when VDD ≥1 V, and undervoltage reset triggers when SENSE falls below 4.55 V. The CONTROL pin enables active-high RESET output configuration and interfaces directly with static RAM chip-select logic during power failure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sense Threshold | 4.55 V ±0.08 V - precisely monitors 5 V rail for undervoltage events without external resistors |
| Supply Current | 9–16 µA - enables multi-year battery operation in always-on monitoring applications |
| Reset Delay Range | 1.1–4.2 ms (with 100 nF CT) - configurable timing ensures reliable system initialization |
| Operating Voltage | 2 V to 6 V - compatible with 3.3 V and 5 V logic domains and mixed-supply systems |
| Output Drive | 2 mA sink / 2 mA source - sufficient to drive TTL/CMOS inputs and small capacitive loads |
| Temperature Range | –40°C to +85°C - qualified for commercial and industrial ambient environments |
| Hysteresis | 70 mV - prevents oscillation during slow-rising/falling supply transitions |
Pinout & Package
Package: 8-pin PDIP (Plastic Dual In-line Package), 0.3 inch body width, through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Return path for all internal circuitry and output current; must be low-impedance |
| VDD | Power supply input | Accepts 2–6 V; powers internal reference, comparator, and output stage |
| SENSE | Voltage monitor input | Compares applied voltage to 4.55 V threshold; bypass capacitor recommended |
| CONTROL | Reset polarity select | Low = active-high RESET; high = active-low RESET; enables RAM power-down mode |
| RESIN | Manual reset input | Active-low asynchronous reset override; requires <0.2×VDD for assertion |
| RESET | Active-low reset output | Open-drain/totem-pole capable; drives downstream logic or reset line directly |
| RESET | Active-high reset output | Complementary to RESET; used for systems requiring high-asserted reset signal |
| NC | No connect | Not internally bonded; left unconnected per TI design |
Key Features
| Feature | Design Value |
|---|---|
| Programmable reset delay | Configured externally with single capacitor (td = 2.1 × 10⁴ × CT), eliminating need for RC timing networks on PCB |
| Power-down control support | CONTROL pin enables automatic disabling of static RAM during power loss when driven by microprocessor bank select |
| Defined reset at low VDD | Guaranteed RESET assertion down to VDD = 1 V - ensures early reset during power ramp-up |
| Micropower operation | Max 16 µA supply current - reduces load on battery or low-power supplies in standby mode |
| Temperature-stable reference | Internal bandgap reference compensated over full operating range - maintains 4.55 V threshold accuracy |
Applications
| Industrial PLC Controller | Medical Diagnostic Instrument |
|---|---|
|
Use Scenario: Monitors 5 V main supply in programmable logic controller CPU module during cold start and brownout conditions. IC Role / Device Role / Timing Role: Voltage supervisor providing power-on reset and undervoltage lockout; asserts RESET until VDD stabilizes above 4.55 V and delay expires. Use Value: Prevents firmware execution before stable clock and memory initialization, eliminating boot failures in harsh electrical environments. |
Use Scenario: Supervises auxiliary 5 V rail powering FPGA configuration memory and sensor interface in portable ultrasound unit. IC Role / Device Role / Timing Role: Ensures deterministic reset sequence during battery-swapping and AC/DC transition; CONTROL pin enables RAM retention mode. Use Value: Maintains critical calibration data in static RAM during brief power interruptions, avoiding recalibration delays. |
| Energy Meter with Tamper Detection | Smart Grid Communication Module |
|
Use Scenario: Guards 3.3 V microcontroller supply in ANSI C12.22-compliant electricity meter exposed to grid transients. IC Role / Device Role / Timing Role: Detects dips below 4.55 V on boosted 5 V rail; generates clean, debounced reset pulse with 2.1 ms typical delay. Use Value: Eliminates false resets caused by EFT bursts while ensuring valid reset assertion during sustained sags >100 ms. |
Use Scenario: Supervises isolated 5 V DC-DC output powering RF transceiver and secure bootloader in cellular-connected grid node. IC Role / Device Role / Timing Role: Provides fail-safe reset initiation and coordinates controlled shutdown via CONTROL-driven memory disable. Use Value: Preserves last-known network state and encryption keys in battery-backed SRAM during AC dropout or lightning-induced surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV803EC26DBZR | Fixed 2.63 V threshold, SOT-23-3 package, 0.9 µA max quiescent current | Lower voltage monitoring only; no dual RESET outputs or CONTROL pin | Select when supervising sub-3.3 V rails and ultra-low IDD is critical; not drop-in for 4.55 V or RAM control use cases |
| TPS3808G33DBVR | Adjustable threshold (via resistor divider), 3.3 V fixed option, 1.8 µA max IDD, open-drain RESET | Lacks active-high RESET output and CONTROL-driven RAM disable logic | Choose for flexible threshold design or lower power; requires external components for 4.55 V setting and cannot replicate TLC7705IPE4's dual-output power-down control |
Compared with TLV803EC26DBZR and TPS3808G33DBVR, the TLC7705IPE4 uniquely delivers factory-trimmed 4.55 V detection, complementary RESET outputs, and integrated static RAM power-down coordination - making it irreplaceable in legacy 5 V systems requiring guaranteed timing and hardware-controlled data retention.
Availability
TLC7705IPE4 is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and smart energy metering requiring stable component supply and long-term obsolescence management.
Supply support for TLC7705IPE4 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 specializing in analog and embedded processing technologies, with decades of leadership in power management and precision analog ICs.
The TLC77xx family was designed specifically for reliable, low-power supply monitoring in microcomputer and microprocessor systems - emphasizing accuracy, stability over temperature, and seamless integration with memory backup architectures.
FAQ
What is the exact sense threshold voltage of the TLC7705IPE4?
The TLC7705IPE4 has a factory-trimmed negative-going input threshold voltage (VIT–) of 4.55 V, with a tolerance of ±0.08 V over the full operating temperature range (–40°C to +85°C). This value is specified in the Electrical Characteristics table of the SLVS087M datasheet and applies directly to the TLC7705IPE4 variant in PDIP packaging.
Does the TLC7705IPE4 support active-high reset output?
Yes, the TLC7705IPE4 provides both active-low RESET and active-high RESET outputs simultaneously. The CONTROL pin determines polarity: when CONTROL is pulled low, RESET is active-high and RESET is active-low. This dual-output capability is intrinsic to the TLC7705IPE4 silicon design and does not require external inversion.
How is the reset delay time set on the TLC7705IPE4?
The reset delay time (td) on the TLC7705IPE4 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, as confirmed in the Switching Characteristics table.
Can the TLC7705IPE4 operate from a 3.3 V supply?
Yes, the TLC7705IPE4 operates across a supply voltage range of 2 V to 6 V, fully supporting 3.3 V nominal systems. Its internal voltage reference and comparator remain functional at 3.3 V, and the 4.55 V sense threshold continues to provide accurate supervision of higher-voltage rails (e.g., a 5 V supply monitored from a 3.3 V domain), as verified in the Recommended Operating Conditions table.
What is the maximum supply current of the TLC7705IPE4?
The maximum supply current (IDD) of the TLC7705IPE4 is 16 µA under recommended operating conditions (VDD = 5 V, TA = 85°C), with a typical value of 9 µA at 25°C. This micropower specification is measured with RESIN and CONTROL at valid logic levels and outputs unloaded, and is explicitly guaranteed in the Electrical Characteristics section of the SLVS087M datasheet.
TLC7705IPE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- -
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
TLC7705IPE4 FAQ
1.How can I place an order for TLC7705IPE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC7705IPE4 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 TLC7705IPE4 reliable?
The price and inventory of TLC7705IPE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC7705IPE4 is usually 5 days.
3.What payment methods are accepted for TLC7705IPE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC7705IPE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC7705IPE4?
TLC7705IPE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC7705IPE4 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 TLC7705IPE4?
For technical support, including TLC7705IPE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC7705IPE4 requirements.
6.How does Aetrix verify that TLC7705IPE4 is sourced from the original manufacturer or authorized distributors?
All TLC7705IPE4 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 TLC7705IPE4 meets industry standards.
7.What is the process for return or replacement of TLC7705IPE4?
All TLC7705IPE4 units undergo pre-shipment inspection (PSI). If there is an issue with TLC7705IPE4, 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 TLC7705IPE4 part is unused and in its original packaging.
Return procedure for TLC7705IPE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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