SN75LV4735

The SN75LV4735† is a low-power 3.3-V multichannel RS-232 line driver/receiver. It includes three independent RS-232 drivers and five independent RS-232 receivers. It is designed to operate off a single 3.3-V supply and has an internal switched-capacitor voltage converter to generate the RS-232 output levels. The SN75LV4735 provides a single chip, single 3.3-V supply interface between the asynchronous communications element (ACE or UART) and the serial-port connector of the data terminal equipment (DTE). This device has been designed to conform to standard ANSI EIA/TIA-232-E.

The switched-capacitor voltage converter of the SN75LV4735 uses five small external capacitors to generate the positive and negative voltages required by EIA/TIA-232-E line drivers from a single 3.3-V input. The drivers feature output slew-rate limiting to eliminate the need for external filter capacitors. The receivers can accept ±30 V without damage.

The device SN75LV4735 also features a reduced power or standby mode that cuts the quiescent power to the integrated circuits when not transmitting data between the CPU and peripheral equipment. The STBY input is driven high for standby (reduced power) mode and driven low for normal operating mode. When in the standby mode, all driver outputs (DOUT13) and receiver outputs (ROUT15) are in the high-impedance state. If the standby feature is not used in an application, STBY should be tied to GND.

The SN75LV4735 has been designed using LinBiCMOSE technology and cells contained in the Texas Instruments LinASICE library. The SN75LV4735 is characterized for operation from 0°C to 70°C.