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5-V, programmable, dual-supply supervisor with programmable delay time

ACTIVE custom-reels CUSTOM Custom reel may be available


Qty Price (USD)
1-99 2.666
100-249 2.202
250-999 1.582
1,000+ 1.19

Quality information

RoHS Yes
Lead finish / Ball material NIPDAU
MSL rating / Peak reflow Level-1-260C-UNLIM
Quality, reliability
& packaging information info-circle

Information included:

  • RoHS
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
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Export classification

*For reference only

  • US ECCN: EAR99

Packaging information

Package | Pins SOIC (DW) | 16
Package qty | Carrier: 2,000 | LARGE T&R
Operating temperature range (°C) 0 to 70
View TI packaging information

Features for the TL7770-5

  • Power-On Reset Generator
  • Automatic Reset Generation After Voltage Drop
  • RESET\ Defined When VCC Exceeds 1 V
  • Wide Supply-Voltage Range...3.5 V
    to 18 V
  • Precision Overvoltage and Undervoltage Sensing
  • 250-mA Peak Output Current for Driving SCR Gates
  • 2-mA Active-Low SCR Gate Drive for False-Trigger Protection
  • Temperature-Compensated Voltage Reference
  • True and Complementary Reset Outputs
  • Externally Adjustable Output Pulse Duration

Description for the TL7770-5

The TL7770 is an integrated-circuit system supervisor designed for use as a reset controller in microcomputer and microprocessor power-supply systems. This device contains two independent supply-voltage supervisors that monitor the supplies for overvoltage and undervoltage conditions at the VSO and VSU terminals, respectively. When VCC attains the minimum voltage of 1 V during power up, the RESET\ output becomes active (low). As VCC approaches 3.5 V, the time-delay function activates, latching RESET and RESET\ active (high and low, respectively) for a time delay (td) after system voltages have achieved normal levels. Above VCC = 3.5 V, taking RESIN\ low activates the time-delay function during normal system-voltage levels. To ensure that the microcomputer system has reset, the outputs remain active until the voltage at VSU exceeds the threshold value, VIT+, for a time delay, which is determined by an external timing capacitor such that:
td 20 × 103 × capacitance

where td is in seconds and capacitance is in farads.

The overvoltage-detection circuit is programmable for a wide range of designs. During an overvoltage condition, an internal silicon-controlled rectifier (SCR) is triggered, providing 250-mA peak instantaneous current and 25-mA continuous current to the SCR gate drive terminal, which can drive an external high-current SCR gate or an overvoltage-warning circuit.

The TL7770C series is characterized for operation from 0°C to 70°C. The TL7770I series is characterized for operation from -40°C to 85°C.



Qty Price (USD)
1-99 2.666
100-249 2.202
250-999 1.582
1,000+ 1.19

Carrier options

You can choose different carrier options based on the quantity of parts, including full reel, custom reel, cut tape, tube or tray.

custom reel is a continuous length of cut tape from one reel to maintain lot- and date-code traceability, built to the exact quantity requested. Following industry standards, a brass shim connects an 18-inch leader and trailer on both sides of the cut tape for direct feeding into automated assembly machines. TI includes a reeling fee for custom reel orders.

Cut tape is a length of tape cut from a reel. TI may fulfill orders using multiple strips of cut tapes or boxes to satisfy the quantity requested.

TI often ships  tube or tray  devices inside a box or in the tube or tray, depending on inventory availability. We pack all tapes, tubes or sample boxes according to internal electrostatic discharge and moisture-sensitivity-level protection requirements.

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Lot and date code selection may be available

Add a quantity to your cart and begin the checkout process to view the options available to select lot or date codes from existing inventory.

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