Electronic Components Datasheet Search |
|
DS78LS120 Datasheet(PDF) 4 Page - National Semiconductor (TI) |
|
|
DS78LS120 Datasheet(HTML) 4 Page - National Semiconductor (TI) |
4 / 9 page Application Hints (Continued) Unbalanced Data Transmission 00749906 00749907 Logic Level Translator 00749908 The DS78LS120 may be used as a level translator to inter- face between ±12V MOS, ECL, TTL and CMOS. To config- ure, bias either input to a voltage equal to 1⁄2 the voltage of the input signal, and the other input to the driving gate. LINE DRIVERS Line drivers which will interface with the DS78LS120 are listed below. Balanced Drivers DS26LS31: Quad RS-422 Line Driver, Dual CMOS DS7830, DS8830: Dual TTL DS7831, DS8831: Dual TRI-STATE TTL DS7832, DS8832: Dual TRI-STATE TTL DS1691A, DS3691: Quad RS-423/Dual RS-422 TTL DS1692, DS3692: Quad RS-423/Dual TRI-STATE RS-422 TTL DS3487: Quad TRI-STATE RS-422 Unbalanced Drivers DS1488: Quad RS-232 DS75150: Dual RS-232 RESPONSE CONTROL AND HYSTERESIS In unbalanced (RS-232/RS-423) applications it is recom- mended that the rise time and fall time of the line driver be controlled to reduce cross-talk. Elimination of switching noise is accomplished in the DS78LS120 by the 50 mV of hysteresis incorporated in the output gate. This eliminates the oscillations which may appear in a line receiver due to the input signal slowly varying about the threshold level for extended periods of time. High frequency noise which is superimposed on the input signal which may exceed 50 mV can be reduced in ampli- tude by filtering the device input. On the DS78LS120, a high impedance response control pin in the input amplifier is available to filter the input signal without affecting the termi- nation impedance of the transmission line. Noise pulse width rejection vs the value of the response control capacitor is shown in Figure 1 and Figure 2. This combination of filters followed by hysteresis will optimize performance in a worse case noise environment. 00749909 FIGURE 1. Noise Pulse Width vs Response Control Capacitor www.national.com 4 |
Similar Part No. - DS78LS120 |
|
Similar Description - DS78LS120 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |