Texas Instruments SNJ54LS629FK
- Part Number:
- SNJ54LS629FK
- Manufacturer:
- Texas Instruments
- Ventron No:
- 6389546-SNJ54LS629FK
- Description:
- Voltage-Controlled Oscillators
- Datasheet:
- sn54ls629
- Technology familyLS
- Bits (#)2
- Supply voltage (min) (V)4.75
- Supply voltage (max) (V)5.25
- Input typeBipolar
- Output typePush-Pull
- Supply current (max) (μA)55000
- IOL (max) (mA)24
- IOH (max) (mA)-1.2
- Operating temperature range (°C)-55 to 125
- RatingMilitary
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 due 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.
A single 5-volt supply can be used: however, one set of supply voltage and ground pins (VCC and GND) is provided for the enable, synchronization-gating, and output sections, and a separate set (OSC VCC and OSC GND) is provided for the oscillator and associated frequency-control circuits so that effective isolation can be accomplished in the system. For operation of frequencies greater than 10 MHz, it is recommended that two independent supplies be used. Disabling either VCO of the 'LS625 and 'LS625 and 'LS627 can be achieved by removing the appropriate OSC VCC. An enable input is provided on the 'LS624, 'LS626, 'LS628, and 'LS629. When the enable input is low, the output is enabled: when the enable input is high, the internal oscillator is disabled, Y is high, and Z is low. Caution! Crosstalk may occur in the dual devices ('LS625, 'LS626, 'LS627 and 'LS629) when both VCOs are operated simultaneously. To minimize crosstalk, either of the following are recommended: (A) If frequencies are widely separated, use a 10-μh inductor between VCC pins. (B) If frequencies are closely spaced, use two separate VCC supplies or place two series diodes between the VCC pins.
The pulse-synchronization-gating section ensures that the first output pulse is neither clipped nor extended. The duty cycle of the square-wave output is fixed at approximately 50 percent.
The SN54LS624 thru SN54LS629 are characterized for operation over the full military temperature range of -55°C to 125°C. The SN74LS624 thru SN74LS629 are characterized for operation from 0°C to 70°C.
Voltage-Controlled Oscillators 20-LCCC -55 to 125
Latest News
-
26 January 2024
What is NRF24L01 and How Does It Work?
Ⅰ. Overview of NRF24L01Ⅱ. Who is the manufacturer of NRF24L01?Ⅲ. Structural block diagram of NRF24L01Ⅳ. Applications of NRF24L01Ⅴ. Communication conditions of NRF24L01Ⅵ. Working modes of NRF24L01Ⅶ. Working principle... -
29 January 2024
2SC5200 Transistor Manufacturer, Specifications, Applications and Usage
Ⅰ. Overview of 2SC5200 transistorⅡ. Naming rules of 2SC5200 transistorⅢ. Symbol, footprint and pin configuration of 2SC5200Ⅳ. Manufacturer of 2SC5200 transistorⅤ. Specifications of 2SC5200 transistorⅥ. Applications of 2SC5200... -
29 January 2024
TQP3M9028 RF Amplifier Alternatives, Market Trend, Applications and Other Details
Ⅰ. TQP3M9028 descriptionⅡ. Manufacturer of TQP3M9028Ⅲ. Specifications of TQP3M9028Ⅳ. Market trend of TQP3M9028Ⅴ. How to choose TQP3M9028?Ⅵ. Absolute maximum ratings of TQP3M9028Ⅶ. Where is TQP3M9028 used?TQP3M9028 is a... -
30 January 2024
AD7606BSTZ Converter Technical Parameters, Characteristics, Working Principle and Package
Ⅰ. Overview of AD7606BSTZⅡ. Technical parameters of AD7606BSTZⅢ. Characteristics of AD7606BSTZⅣ. Absolute maximum ratings of AD7606BSTZⅤ. How does AD7606BSTZ work?Ⅵ. Package of AD7606BSTZⅦ. What are the applications of...
Help you to save your cost and time.
Reliable package for your goods.
Fast Reliable Delivery to save time.
Quality premium after-sale service.