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  • 74LS629 IC - (SMD Package) - Voltage Controlled Oscillators IC (74629 IC)

These voltage-controlled oscillators (VCOs) are Improved versions of the original VCO family: SN54LS124, SN54LS324 thru SN54LS327, SN74LS124, and SN74LS324 thru SN74LS327. These new devices feature improved voltage-to frequency linearity, range, and compensation. With the exception of the "LS624 and LS628, all of these devices feature two independent VCOs in a single monolithic chip. The 'LS624, 'LS625, LS626, and LS628 have complementary Z outputs. The output frequency for each VCO is established by a single external component (either a capacitor or crystal) in combination with voltage-sensitive inputs used for frequency control and frequency range. Each device has a voltage-sensitive input for frequency control; however, the 'LS624, 'LS628, and 'LS629 devices also have one for frequency range. (See Figures 1 thru 6).

The LS628 offers more precise temperature compensation than its 'LS624 counterpart. The LS624 features a 600 ohm internal timing resistor. The 'LS628 requires a timing resistor to be connected externally across Rext pins. Temperature compensation will be improved dur to the temperature coefficient of the external resistor.

Figure 3 and Figure 6 contain the necessary information to choose the proper capacitor value to obtain the desired operating frequency.


Features :-

  • Separate Supply Voltage Pins for Isolation of Frequency Control Inputs and Oscillators from Output Circuitry
  • Highly Stable Operation over Specified Temperature and/or Supply Voltage Ranges


Specifications :-

  • Supply Voltage Min : 4.75V
  • Supply Voltage Max : 5.25V
  • High Level output Current Max : -1.2mA
  • Low Level output Current Max : 8mA
  • Operation free air temperature Max : 70°C



Package Includes :-

1 X 74LS629 IC - (SMD Package) - Voltage Controlled Oscillators IC (74629 IC)

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74LS629 IC - (SMD Package) - Voltage Controlled Oscillators IC (74629 IC)

  • Product Code: EC-11240
  • Availability: 1793
  • Rs.55.00
  • (Excluding 18% GST)

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