DM74121N DATASHEET PDF
DMN datasheet, circuit, data sheet, alldatasheet, Datasheet search site for Electronic Components and Semiconductors, diodes, triacs, and other. DMN One-shot With Clear And Complementary Outputs. The is a monostable multivibrator featuring both positive and negative edge triggering with. Download Fairchild Semiconductor DMN pdf datasheet file.
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A non-inductive and low capacitive path datasehet necessary to ensure complete discharge of CX in each cycle of its operation so that the output pulse width will be accurate. Once triggered the output pulse width is independent of further transitions of the inputs and is a function of the timing components.
If CX is an electrolytic capacitor a switching diode is often required for standard TTL one-shots to prevent high inverse leakage current Figure 2. National Semiconductor Europe Fax: For small time constants use high-quality mica, glass, polypropylene, polycarbonate, or polystyrene capacitors. This device can be used xatasheet a single external capacitor.
DMN (NSC) PDF技术资料下载 DMN 供应信息 IC Datasheet 数据表 (1/6 页)
The pulse width is essentially dm71421n by external timing components RX and CX. An external resistor RX or the internal resistor 2 kX and an external capacitor CX are required for proper operation.
Not more than one output should be shorted at a time. For large time constants d7m4121n solid tantalum or special aluminum capacitors. Furthermore, the bypass capacitor should be located as close to the VCCpin as space permits.
Pulse width can vary from a few nano-seconds to 28 seconds by choosing appropriate RX and CX combinations. Life support devices or systems are devices or systems which, a are intended for surgical implant into the body, or dm7412n support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user.
There are three trigger inputs from the device, two negative edge-triggering A inputs, one positive edge Schmitt-triggering B input. A high immunity to VCC noise of typically 1. For CX l pF the output is defined as: The value of CX may vary from 0 to any necessary value.
If the lead length from CX to pins 10 and 11 is greater than 3 cm, for example, the output pulse width might be quite different from values predicted from the appropriate equations.
DM Datasheet PDF – National ->Texas Instruments
An internal 2kX timing resistor is provided for design convenience minimizing component count and layout problems. Output pulse width versus VCC and operation temperatures: The device should not be operated at these limits.
If the timing capacitors have leakages approaching nA or if stray capacitance from either terminal to ground is greater than 50 pF the timing equations may not represent the pulse width the device generates. VCC and ground wiring should conform to good high-frequency standards and practices so that switching transients on the VCC and ground return leads do not cause interaction between one-shots.
DM74121N PDF Datasheet浏览和下载
To obtain dafasheet and trouble free operation please read operating rules and NSC one-shot application notes carefully and observe recommendations. Supply Voltage 7V Input Voltage 5. Tsimshatsui, Kowloon Hong Kong Tel: Figure 4 depicts pulse width variation versus ambient temperature.
Figure 5 details this characteristic. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, datwsheet to affect its safety or effectiveness. Figure 3 depicts the relationship between pulse width variation versus VCC.