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Description
DUAL PRECISION TIMERS
Title
Dual precision timer
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DESCRIPTION
Both the 556 and 556-1 Dual Monolithic timing circuits are highly stable controllers capable of producing accurate time delays or oscillation. The 556 and 556-1 are a dual 555. Timing is provided by an external resistor and capacitor for each timing function. The two timers operate independently of each other, sharing only VCC and ground. The circuits may be triggered and reset on falling waveforms. The output structures may sink or source 200mA.
FEATURES
● Turn-off time less than 2μs (556-1)
● Maximum operating frequency >500kHz (556-1)
● Timing from microseconds to hours
● Replaces two 555 timers
● Operates in both astable and monostable modes
● High output current
● Adjustable duty cycle
● TTL compatible
● Temperature stability of 0.005%/℃
● SE556-1 compliant to MIL-STD or JAN
APPLICATIONS
● Precision timing
● Sequential timing
● Pulse shaping
● Pulse generator
● Missing pulse detector
● Tone burst generator
● Pulse width modulation
● Time delay generator
● Frequency division
● Touch-Tone encoder
● Industrial controls
● Pulse position modulation
● Appliance timing
● Traffic light control
Preview of the first 3 pages of the data sheet
Document Preview
Two Precision Timing Circuits Per Package Astable or Monostable Operation TTL-Compatible Output Can Sink or Source
to 150 mA Active Pullup or Pulldown Designed to Be Interchangeable WithPulse-Shaping Circuits Missing-Pulse Detectors Tone-Burst Generators Pulse-Width Modulators Pulse-Position Modulators Sequential Timers Pulse Generators Frequency Dividers Application Timers Industrial Controls Touch-Tone Encoders
These devices provide two independent timing circuits of the or SE555 type in each package. These circuits can be operated in the astable or the monostable mode with external resistor-capacitor (RC) timing control. The basic timing provided by the RC time constant can be controlled actively by modulating the bias of the control-voltage input.
The threshold (THRES) and trigger (TRIG) levels normally are two-thirds and one-third, respectively, of VCC. These levels can be altered by using the control voltage (CONT) terminal. When the trigger input falls below trigger level, the flip-flop is set and the output goes high. If the trigger input is above the trigger level and the threshold input is above the threshold level, the flip-flop is reset, and the output is low. The reset (RESET) input can override all other inputs and can be used to initiate a new timing cycle. When RESET goes low, the flip-flop is reset and the output goes low. When the output is low, a low-impedance path is provided between the discharge (DISCH) terminal and ground (GND).
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
On products compliant to MIL-PRF-38535, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters.
Tube of 25 Tube of 50 Reel of 2500 Reel of 2000 Tube of 25 Tube of 25 Tube of 50 Reel of 2500(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package.
DISCH GND RESET can override TRIG, which can override THRES.(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating
conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltage values are with respect to network ground terminal. (3) Maximum power dissipation is a function of TJ(max), JA, and TA. The maximum allowable power dissipation at any allowable ambient
temperature PD = (TJ(max) TA)/JA. Operating at the absolute maximum of 150°C can affect reliability. (4) The package thermal impedance is calculated in accordance with JESD 51-7. (5) Maximum power dissipation is a function of TJ(max), JC, and TC. The maximum allowable power dissipation at any allowable case
temperature PD = (TJ(max) TC)/JC. Operating at the absolute maximum of 150°C can affect reliability. (6) The package thermal impedance is calculated in accordance with MIL-STD-883.
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11 buyer reviews from Singapore
George Chan
Length of registration:16 years
The goods have been received. The packaging is very good. By the way, there are not a few in the list. The logistics is also very fast
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09/02/2022
Vincent Loh
Length of registration:5 years
Good
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03/18/2019
Steven Tan
Length of registration:6 years
Very satisfied with
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11/28/2018
Doris Boo
Length of registration:14 years
Very well-packed
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01/05/2017
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NE556N
NE556N has several brands around the world that may have alternate names for NE556N due to regional differences or acquisition. NE556N may also be known as the following names:
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