• Product Introduction

LT1280AISW

Dual driver/receiver with low power consumption 5V RS232 and 0.1μF capacitance

peculiarity

• 10mA maximum supply current
• ESD protection of more than ± 10kV
• Use small capacitors: 0.1μF
• R L = 3K, CL = 2500pF 120kBaud operation
• R L = 3K, C L = 1000PF 250kBaud operation
• The output withstand voltage is damage-free ± 30V
• CMOS comparative low power: 40mw
• Available from a single 5V supply
• Rugged bipolar design
• The output assumes a high impedance state when turned off or powered off
• Meets all RS-232 specifications
• Provided or not shutdown
• Absolutely no lockout
• Available in SO packages

description

The now obsolete H (metal cans), J (ceramics) and K (metal cans) from the linear technology packages

® The LT 1280A/LT1281A integral charge pump dual RS232 driver/receiver pair generates a single 5V supply for RS232 voltage levels. These circuits feature a rugged bipolar design that provides operating system fault tolerance and ESD protection that competing CMOS designs cannot match. Using only 0.1μF external capacitors, these circuits consume only 40mW of power and can operate 120kbaud or even high capacitance loads while driving. The new ESD structure on the chip allows LT1280A/LT1281A to survive multiple ± 10kV blows, eliminating the RS232 line pins required expensive TransZorbs ®. LT1280A/LT1281A is fully compliant with EIA RS232 standards. The driver outputs protection against overload and can be short-circuited to ground or up to ± 30V without damage. In the event of a shutdown or power failure, the driver and receiver outputs in a high-impedance state, allowing row sharing.

LT1281A are available in 16-pin DIP and SO packages. LT1280A is to provide 18-pin DIP and SO packages that require the application to be turned off.