TLC555

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2.1-MHz, 250-µA, Low-Power Timer

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Product details

Parameters

VCC (Min) (V) 2 VCC (Max) (V) 15 Iq (Typ) (uA) 250 Rating Catalog Operating temperature range (C) -40 to 125, -40 to 85, 0 to 70 open-in-new Find other Real-time clocks (RTCs) & timers

Package | Pins | Size

PDIP (P) 8 93 mm² 9.81 x 9.43 SOIC (D) 8 19 mm² 3.91 x 4.9 SOP (PS) 8 48 mm² 6.2 x 7.8 TSSOP (PW) 14 32 mm² 5 x 6.4 open-in-new Find other Real-time clocks (RTCs) & timers

Features

  • Very low power consumption:
    • 1-mW typical at VDD = 5 V
  • Capable of operation in astable mode
  • CMOS output capable of swinging rail to rail
  • High output current capability
    • Sink: 100-mA typical
    • Source: 10-mA typical
  • Output fully compatible with CMOS, TTL, and MOS
  • Low supply current reduces spikes during output transitions
  • Single-supply operation from 2 V to 15 V
  • Functionally interchangeable with the NE555; has same pinout
  • ESD protection exceeds 2000 V per MIL-STD-883C, method 3015.2
  • Available in Q-temp automotive
    • High-reliability automotive applications
    • Configuration control and print support
    • Qualification to automotive standards

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Description

The TLC555 is a monolithic timing circuit fabricated using the TI LinCMOS™ process. The timer is fully compatible with CMOS, TTL, and MOS logic and operates at frequencies up to 2 MHz. Because of its high input impedance, this device supports smaller timing capacitors than those supported by the NE555 or LM555. As a result, more accurate time delays and oscillations are possible. Power consumption is low across the full range of power-supply voltage.

Like the NE555, the TLC555 has a trigger level equal to approximately one-third of the supply voltage and a threshold level equal to approximately two-thirds of the supply voltage. These levels can be altered by use of the control voltage terminal (CONT). When the trigger input (TRIG) falls below the trigger level, the flip-flop is set and the output goes high. If TRIG is above the trigger level and the threshold input (THRES) is above the threshold level, the flip-flop is reset and the output is low. The reset input (RESET) can override all other inputs and can be used to initiate a new timing cycle. If RESET is low, the flip-flop is reset and the output is low. Whenever the output is low, a low-impedance path is provided between the discharge terminal (DISCH) and GND. All unused inputs must be tied to an appropriate logic level to prevent false triggering.

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Technical documentation

= Featured
No results found. Please clear your search and try again. View all 3
Type Title Date
* Datasheet TLC555 LinCMOS™ Timer datasheet (Rev. I) Jul. 05, 2019
More literature Design low-duty-cycle timer circuits Oct. 03, 2016
Application notes Synchronizing Three or More UCC28950 Phase-Shifted, Full-Bridge Controllers Sep. 13, 2011

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$25.00
Description
The DRV10866EVM (evaluation module) provides a cost effective, low voltage, sensorless-solution for running a 3-phase BLDC motor in 150 degree trapezoidal commutation.
Features
  • 2-5.5V supply voltage range
  • 680mA peak output current
  • Allows user to spin their motor in two easy steps: Attach power. Attach motor.
  • Easy speed control with onboard poteometer and 555 timer
  • PWM and FG connect pins allow for optional closed loop MCU control
  • Fully protected and robust solution
EVALUATION BOARDS Download
document-generic User guide
$49.00
Description
The  DRV10964EVM evaluation module (EVM) serves as a user-friendly evaluation kit to demonstrate TI's brushless motor driver DRV10964. The EVM is a high-performance, power-efficient, cost-effective platform that speeds development for quicker time to market. The DRV10964EVM supports sensoreless (...)
Features
  • Power Supply Voltage Range: 2.1 V to 5.5 V
  • Onboard analog potentiometer for speed control
  • Startup configuration can be tuned through 'CONFIG' pin
  • Jumper configuration for FG signal and FR (direction of rotation)
EVALUATION BOARDS Download
document-generic User guide
$49.00
Description
The  DRV10970EVM evaluation module (EVM) serves as a user-friendly evaluation kit to demonstrate TI's brushless motor driver DRV10970. The EVM is a high-performance, power-efficient, cost-effective platform that speeds development for quicker time to market. The DRV10970EVM supports single (...)
Features
  • Wide Power Supply Voltage Range: 5 to 18 V
  • PWM or onboard analog potentiometer speed control
  • Jumper configuration to select differential Hall signal or Hall IC signal
  • On board switch to connect/disconnect power and Over current protection
  • Jumper configuration to select trapezodial mode or sine mode
EVALUATION BOARDS Download
document-generic User guide
$75.00
Description

The three-phase brushless motor pre-driver DRV8307 can drive brushless DC and brushless AC (BLAC) - often referred to as permanent magnet synchronous (PMSM).  Aimed at 12V and 24V motors, this simple pre-driver features a PWM current control interface, three Hall sensor inputs, and locked rotor (...)

Features
  • DRV8307 8.5-32V, three phase BLDC pre-driver
  • TLC555 PWM generation circuit
  • Power stage based upon TI’s N-channel NexFET(TM) power MOSFETs
  • Supports 8.5V to 32V and 5A power. Current can be increased by changing RSENSE
EVALUATION BOARDS Download
document-generic User guide
$49.00
Description

The DRV8704 evaluation module (EVM) demonstrates the integrated current regulating capabilities and performance of the DRV8704 integrated circuit from Texas Instruments. The EVM includes the DRV8704 to control two brushed motors, a simple jumper connection scheme to route the DRV8704 inputs, a (...)

Features
  • Highly configurable SPI interface
  • 8V to 52V supply voltage range
  • Multiple decay modes
  • Adjustable current regulation
  • 5V, 10-mA LDO regulator
EVALUATION BOARDS Download
document-generic User guide
$49.00
Description

The DRV8870 evaluation module (EVM) demonstrates the capabilities and performance of the DRV8870 integrated circuit from Texas Instruments. The EVM includes a 5V regulator and PWM generator. A single power source is required to evaluate the DRV8870.

Features
  • 6.5V to 45V Operating Supply Voltage Range
  • On board 5V Regulator
  • Adjustable PWM Duty Cycle
  • Adjustable Current Regulation
EVALUATION BOARDS Download
document-generic User guide
$49.00
Description

The DRV8871 evaluation module demonstrates the capabilities and performance of the DRV8871 integrated circuit from Texas Instruments. The EVM includes a 5V regulator and PWM generator. A single power source is required to evaluate the DRV8871.

Features
  • 6.5V to 45V Operating Supply Voltage Range
  • On Board 5V Regulator
  • Adjustable PWM DUty Cycle
  • Adjustable Current Regulation
EVALUATION BOARDS Download
document-generic User guide
$49.00
Description

The DRV8872 evaluation module (EVM) demonstrates the capabilities and performance of the DRV8872 integrated circuit from Texas Instruments. The EVM includes a 5V regulator and PWM generator. A single power source is required to evaluate the DRV8872.

Features
  • 6.5V to 4.5V Operating Supply Voltage Range
  • On board 5V regulator
  • Adjustable PWM duty cycle

Design tools & simulation

SIMULATION MODELS Download
SLFJ002D.ZIP (84 KB) - PSpice Model
SIMULATION MODELS Download
SLFM002B.TSC (100 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SLFM003B.TSC (102 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SLFM005.ZIP (9 KB) - TINA-TI Spice Model
CALCULATION TOOLS Download
TLC555 Component Calculator
TLC555CALC — This spreadsheet calculates the complete design of a TLC555 timer-based astable circuit given the timing capacitance, on time, and desired duty cycle. Resistor values are calculated to the nearest 1% value.
CALCULATION TOOLS Download
SLVC100A.ZIP (70 KB)

Reference designs

REFERENCE DESIGNS Download
4 Phase, 140 A Reference Design for Intel Stratix 10 GX FPGAs
PMP20176 — This reference design focuses on providing a compact, high-performance, multiphase solution suitable for powering Intel® Stratix® 10 GX field-programmable gate arrays (FPGAs) with a specific focus on the SG2800-I1V variant. Integrated PMBus™ allows for easy output voltage setting and (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
High-Density 12Vin, 1.2Vout, 60A POL Reference Design with Stacked TPS546C20A PMBus DCDC Converters
PMP20490 — The TPS546C23 provides a single IC for both control & the synchronous power stage for high current DC/DC applications and allows doubling of the current capability with use of two of the same part.  Multi-phase also allows output ripple cancellation and effective higher bandwidth control (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Sync Buck for Intel Atom E6xx Tunnel Creek (1.25V @ 10mA)
PMP5922 TI's Highest Power Density Low Input Voltage Complete Intel Atom E6xx (Tunnel Creek) power system designs; in 967mm2 this design has all the voltage regulators needed to power Intel's Atom E6xx CPU platform and fit onto a 70x70 or smaller COM Express Module used in Industrial Automation and Process (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
5V, 3-Phase, Sensorless, Sinusoidal Motor System With Variable Speed Control
TIDA-00114 This BLDC motor system implements a DRV10963, a TLC555 timer, and a generic 5V motor. The sinusoidal control scheme is suitable for small fan applications where low noise is desired. Motor voltage support is 2.1V to 5.5V, and max current is 500mA. Motor speed is controlled by the PWM input. Low (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
5V, 3-Phase, Sensorless Motor System With Variable Speed Control
TIDA-00112 This reference design provides a simple way to spin and control a 5V, 3-phase, BLDC fan motor with minimum development time and overhead. It utilizes the DRV10866, a sensorless BLDC motor driver, for the power stage and a TLC555 timer to provide a variable duty cycle PWM signal for speed control (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Power Solution for Automotive Audio Amplifiers
PMP2688 This reference design supports the supply for an audio amplifier, such as the TAS5414C-Q1 using the various DC/DC power switchers, LDOs, logic, clocks, and op amps. This reference design is also applicable in start/stop systems.

Modifying this reference design can also create a power supply for a (...)

document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Synchronous Step-Down Regulator with PMBus Delivering 0.9V-3.3V at 20A Reference Design
PMP6997 — PMP6997 is a single-phase synchronous switching regulator with PMBus accepting an input voltage range of 4.5Vin to 14Vin and providing an output voltage of 1.2Vout capable of supplying 20A of current. This design uses the TPS40400 synchronous buck controller with PMBus and two CSD86350Q5D power (...)

CAD/CAE symbols

Package Pins Download
PDIP (P) 8 View options
SO (PS) 8 View options
SOIC (D) 8 View options
TSSOP (PW) 14 View options

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