Electronic Components Datasheet Search |
|
LT1181AISW Datasheet(PDF) 6 Page - Linear Technology |
|
LT1181AISW Datasheet(HTML) 6 Page - Linear Technology |
6 / 12 page 6 LT1180A/LT1181A PI FU CTIO S TR1 IN, TR2 IN: RS232 Driver Input Pins. These inputs are TTL/CMOS compatible. Inputs should not be allowed to float. Tie unused inputs to VCC. TR1 OUT, TR2 OUT: Driver Outputs at RS232 Voltage Levels. Driver output swing meets RS232 levels for loads up to 3k. Slew rates are controlled for lightly loaded lines. Output current capability is sufficient for load conditions up to 2500pF. Outputs are in a high impedance state when in shutdown mode, VCC = 0V, or when the driver disable pin is active. Outputs are fully short-circuit protected from V – + 30V to V + – 30V. Applying higher voltages will not damage the device if the overdrive is moderately current limited. Short circuits on one output can load the power supply generator and may disrupt the signal levels of the other outputs. The driver outputs are protected against ESD to ±10kV for human body model discharges. REC1 IN, REC2 IN: Receiver Inputs. These pins accept RS232 level signals ( ±30V)intoaprotected5kterminating resistor. The receiver inputs are protected against ESD to ±10kV for human body model discharges. Each receiver provides 0.4V of hysteresis for noise immunity. Open receiver inputs assume a logic low state. REC1 OUT, REC2 OUT: Receiver outputs with TTL/CMOS Voltage Levels. Outputs are in a high impedance state when in shutdown mode to allow data line sharing. Outputs are fully short-circuit protected to ground or VCC with the power on, off or in the shutdown mode. C1+, C1–, C2 +, C2 –: Commutating Capacitor Inputs. These pins require two external capacitors C ≥ 0.1µF: one from C1+ to C1– and another from C2+ to C2 –. C1 should be deleted if a separate 12V supply is available and con- nected to pin C1+. Similarly, C2 should be deleted if a separate – 12V supply is connected to pin V –. ESD Test Circuit ESD PROTECTIO The RS232 line inputs of the LT1180A/LT1181A have on- chip protection from ESD transients up to ±10kV. The protection structures act to divert the static discharge safely to system ground. In order for the ESD protection to function effectively, the power supply and ground pins of the circuit must be connected to ground through low impedances. The power supply decoupling capacitors and charge pump storage capacitors provide this low imped- ance in normal application of the circuit. The only con- straint is that low ESR capacitors must be used for bypassing and charge storage. ESD testing must be done with pins VCC, VL, V+, V –, and GND shorted to ground or connected with low ESR capacitors. LT1180A • ESD TC RS232 LINE PINS PROTECTED TO ±10kV 1 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 10 0.1 µF 0.1 µF NC C1+ V+ C1– C2+ C2– V– DR2 OUT LT1180A ON/OFF 5V VCC GND DR1 OUT RX1 IN RX1 OUT DR1 IN DR2 IN RS232 LINE PINS PROTECTED TO ±10kV RX2 IN RX2 OUT + 0.1 µF + 0.1 µF 0.1 µF + + + |
Similar Part No. - LT1181AISW |
|
Similar Description - LT1181AISW |
|
|
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 |