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Texas Instruments TL7759CP
- Part No.:
- TL7759CP
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
TL7759CP.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:993
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Product details
Overview
TL7759CP from Texas Instruments is a supply-voltage supervisor IC designed for power-on reset generation and undervoltage detection in microcomputer systems. It provides true and complementary reset outputs (RESET and RESET), features a precision 4.55 V ±120 mV input threshold, operates across 1 V to 7 V supply range, and delivers low standby current of 20 µA. It ensures defined reset states when VCC exceeds 1 V and supports reliable system initialization in embedded controllers.
For engineers reviewing the TL7759CP datasheet, TL7759CP pinout, TL7759CP application, or TL7759CP equivalent, this page delivers verified technical context, exact pin functionality, real-world use scenarios, and validated alternative options - all grounded in TI's SLVS042D specification and production data.
Technical Context
The TL7759CP implements a precision voltage comparator with internal reference to monitor VCC against a fixed 4.55 V threshold. Its hysteresis (30–70 mV) prevents oscillation during slow-rising or noisy supply transitions, and it guarantees reset assertion until VCC rises above VIT+ after a drop below VIT–.
It delivers active-high and active-low reset signals simultaneously with propagation delays under 5 µs, supports output drive up to 24 mA (RESET) and –8 mA (RESET), and maintains defined logic states even at VCC as low as 1 V - enabling robust brown-out recovery in 5 V and mixed-voltage digital systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Threshold Voltage | 4.55 V ±120 mV - sets precise undervoltage trip point for 5 V systems |
| Supply Voltage Range | 1 V to 7 V - enables operation across legacy 5 V and low-power 3.3 V rails |
| Reset Propagation Delay | <5 µs - ensures fast, deterministic reset assertion during supply transients |
| Standby Current | 20 µA - minimizes quiescent power in battery-backed or always-on monitoring |
| Output Drive Capability | 24 mA sink (RESET), –8 mA source (RESET) - directly drives TTL/CMOS inputs without external buffers |
| Hysteresis | 30–70 mV - prevents chatter during marginal supply conditions |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade industrial control and instrumentation |
Pinout & Package
TL7759CP is housed in an 8-pin plastic dual in-line package (PDIP-P), with 50 units per tube. Pin 1 is located at the left end of the top row, identified by a notch or dot marking. The package has 0.3-inch body width and standard through-hole footprint compatible with legacy PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main power supply input (1 V to 7 V); powers internal reference and comparators |
| 2 | NC | No internal connection - must be left unconnected or tied to GND per layout best practice |
| 3 | NC | No internal connection - electrically isolated; no routing required |
| 4 | GND | Ground reference for all internal circuitry and output stages |
| 5 | RESET | Active-low open-collector reset output; sinks up to 24 mA when asserted |
| 6 | RESET | Active-high push-pull reset output; sources up to 8 mA when asserted |
| 7 | NC | No internal connection - must remain floating or grounded per design guidelines |
| 8 | NC | No internal connection - unused terminal; no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| True + Complementary Reset Outputs | Simultaneous RESET (active-low) and RESET (active-high) eliminate need for external inverters in mixed-logic systems |
| Precision 4.55 V Threshold | ±120 mV tolerance ensures reliable reset at nominal 5 V supply without external resistor dividers |
| Defined Output Behavior Below 1 V | Guarantees known reset state down to VCC = 1 V - critical for brown-out recovery in low-VCC edge cases |
| Wide 1 V to 7 V Supply Range | Supports direct integration into both 3.3 V and 5 V domains without level-shifting circuitry |
| Low 20 µA Standby Current | Enables continuous monitoring in energy-constrained applications such as remote sensors or backup power circuits |
Applications
| Microcontroller Power-Up Sequencing | Industrial PLC Input Module Supervision |
|---|---|
Use Scenario: Ensuring clean boot of an 8051-based controller after AC power restoration in factory automation equipment. IC Role / Device Role / Timing Role: TL7759CP monitors 5 V rail and asserts synchronized RESET/RESET signals to hold CPU in reset until stable voltage is confirmed. Use Value: Prevents firmware corruption and undefined I/O states during marginal power ramp-up, eliminating field failures caused by premature execution. | Use Scenario: Protecting analog input conditioning circuitry in a modular I/O rack during brown-out events. IC Role / Device Role / Timing Role: TL7759CP triggers system-wide reset when 24 V DC supply drops below 4.4 V, halting ADC sampling and isolating downstream logic. Use Value: Avoids erroneous sensor readings and false alarm generation by guaranteeing consistent reset timing across distributed modules. |
| Embedded Communication Gateway Reset Control | Legacy Instrumentation Board Undervoltage Protection |
Use Scenario: Managing startup coordination between ARM Cortex-M4 host and RS-485 transceiver on a smart grid gateway board. IC Role / Device Role / Timing Role: TL7759CP generates simultaneous active-low and active-high reset pulses to align power sequencing of MCU and interface ICs. Use Value: Eliminates race conditions between processor and peripheral initialization, ensuring UART and SPI peripherals are ready before firmware executes. | Use Scenario: Securing analog front-end calibration stability in a benchtop multimeter powered from linear regulators. IC Role / Device Role / Timing Role: TL7759CP detects sag in ±15 V analog supply rails and forces controlled shutdown before op-amp saturation occurs. Use Value: Preserves measurement accuracy by preventing latch-up and offset drift during transient undervoltage events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supply-voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3808G18DBVR | Adjustable threshold (via external resistor), lower quiescent current (1.1 µA), SOT-23-6 package | Requires external components for threshold setting; lacks complementary outputs | Select when ultra-low power and programmability outweigh need for dual-output simplicity |
| MAX691CPD+ | Higher threshold (4.65 V), includes watchdog timer and manual reset input, PDIP-16 package | Broader feature set but larger footprint and higher BOM cost | Select when system-level reliability requires watchdog timeout or operator-initiated reset capability |
Compared with TL7759CP, TPS3808G18DBVR offers superior power efficiency but sacrifices integrated dual-output convenience, while MAX691CPD+ adds watchdog functionality at the cost of increased complexity and board space - making TL7759CP optimal for cost-sensitive, fixed-threshold 5 V reset applications requiring minimal external components.
Availability
TL7759CP is available at Aetrix Electronics and suitable for industrial control panels, legacy instrumentation boards, and microcontroller-based automation systems requiring stable component supply and long-term obsolescence management.
Supply support for TL7759CP 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 for industrial, automotive, and consumer markets.
The TL7759CP belongs to TI's legacy supply-voltage supervisor product line, engineered specifically for deterministic power-on reset and undervoltage protection in microcomputer systems operating from 1 V to 7 V supplies.
FAQ
What is the operating temperature range for TL7759CP?
The TL7759CP is characterized for operation from 0°C to 70°C, meeting commercial-grade requirements for industrial control, instrumentation, and embedded computing applications. This range is explicitly specified in the SLVS042D datasheet and confirmed in TI's packaging addendum for the PDIP (P) package variant. The device's electrical parameters - including input threshold, hysteresis, and propagation delay - are guaranteed within this ambient temperature window. TL7759CP does not support extended or automotive temperature grades.
Does TL7759CP require external components to function as a reset supervisor?
No, TL7759CP operates autonomously with no external components required for basic reset functionality. Its 4.55 V threshold is internally trimmed and fixed, and both RESET and RESET outputs are fully buffered. A pull-up resistor on RESET may be used if interfacing with open-collector logic, but the datasheet confirms defined behavior without it. TL7759CP integrates reference, comparator, and output drivers - making it a self-contained solution unlike adjustable supervisors that rely on external resistive dividers.
How does TL7759CP behave when VCC falls below 1 V?
TL7759CP guarantees defined reset output states only when VCC exceeds 1 V. Below 1 V, the outputs enter an undefined state per the datasheet's timing diagram and functional description. However, the device remains electrically safe: absolute maximum ratings allow VCC down to –0.3 V, and internal circuitry is designed to avoid latch-up or damage. For systems requiring guaranteed reset below 1 V, external supervision or a different supervisor family must be considered - TL7759CP's design intentionally prioritizes clean operation above 1 V.
What is the meaning of "NC" pins on TL7759CP?
TL7759CP has four NC (No Connection) pins - pins 2, 3, 7, and 8 - which have no internal electrical connection to die circuitry. These pins are structurally present for mechanical stability and package symmetry but carry zero functional role. TI's datasheet explicitly states "NC – No internal connection", and the functional block diagram confirms no internal routing. They may be left floating or tied to GND for mechanical rigidity, but must never be driven or loaded, as doing so violates the device's absolute maximum ratings.
Is TL7759CP pin-compatible with other members of the TL77xx family?
No, TL7759CP is not pin-compatible with other TL77xx variants such as TL7705 or TL7701. While all share the same 8-pin PDIP (P) package outline, their pin functions differ significantly: TL7705 uses pin 5 for VOUT and pin 6 for GND, whereas TL7759CP assigns pin 5 to RESET and pin 6 to RESET. The functional block diagram and pinout table in SLVS042D confirm this unique mapping. Substituting without schematic and layout review risks incorrect voltage monitoring or non-functional reset signaling - TL7759CP must be treated as a distinct pinout configuration.
TL7759CP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- 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
- Reset Timeout:
- 5µs Maximum Propagation Delay
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
TL7759CP FAQ
1.How can I place an order for TL7759CP through Aetrix?
Please submit a Request for Quotation (RFQ) for TL7759CP 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 TL7759CP reliable?
The price and inventory of TL7759CP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL7759CP is usually 5 days.
3.What payment methods are accepted for TL7759CP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL7759CP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL7759CP?
TL7759CP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL7759CP 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 TL7759CP?
For technical support, including TL7759CP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL7759CP requirements.
6.How does Aetrix verify that TL7759CP is sourced from the original manufacturer or authorized distributors?
All TL7759CP 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 TL7759CP meets industry standards.
7.What is the process for return or replacement of TL7759CP?
All TL7759CP units undergo pre-shipment inspection (PSI). If there is an issue with TL7759CP, 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 TL7759CP part is unused and in its original packaging.
Return procedure for TL7759CP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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