Electronic Components Datasheet Search |
|
LTC1387CSW Datasheet(PDF) 10 Page - Linear Technology |
|
LTC1387CSW Datasheet(HTML) 10 Page - Linear Technology |
10 / 12 page 10 LTC1387 S APPLICATI I FOR ATIO EMI and signal reflection problems. Slow slew rate sys- tems can often use improperly terminated or even unterminated cables with acceptable results. The RS485 differential input receiver features an offset input thresh- old of – 80mV at 0V common mode voltage. This allows the receiver output to have a known High output state when the inputs are open or shorted. The receiver also features an input hysteresis of 40mV. The charge pump can be kept active regardless of the state of DXEN and RXEN pins by keeping the ON pin High. This improves the receiver response time by removing the 100 µs charge pump start-up time. In RS232 mode, the drivers and receivers can be selected from the Function Tables with control inputs ON, RXEN and DXEN. The receivers feature a typical 0.6V input hysteresis. All the interface driver outputs are fault protected by a current limiting and thermal shutdown circuit. The thermal shutdown circuit disables both the RS232 and RS485 driver outputs when the die temperature reaches 150 °C. The thermal shutdown circuit reenables the drivers when the die temperature cools to 135 °C. A loopback mode enables internal connections from driver outputs to receiver inputs for self-test. The driver outputs are not isolated from the external loads during loopback. The charge pump generates boosted positive voltage VDD and negative voltage VEE for true RS232 levels from a single 5V VCC supply. The charge pump requires four 0.1 µF capacitors. RA RB DY DZ A B Y Z RA RB DY DZ/SLEW ON VCC RXEN DXEN 485/232 CONTROLLER DX/RX RXEN DXEN MODE INTERFACE A B RS232 RS485 RS485 RS232 RS232 RS485 RS485 SHUTDOWN TRANSMIT MODE RECEIVE MODE TRANSMIT MODE RECEIVE MODE MODE RXEN = 0 RXEN = 1 RXEN = 0 RXEN = 1 RXEN = 0 DXEN = 1 DXEN = 0 DXEN = 1 DXEN = 0 DXEN = 0 MODE = 0 MODE = 0 MODE = 1 MODE = 1 MODE = X 1387 • F13 LTC1387 Figure 13. Half-Duplex RS232 (1-Channel), Half-Duplex RS485 |
Similar Part No. - LTC1387CSW |
|
Similar Description - LTC1387CSW |
|
|
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 |