UT3243A中文资料+3.0V TO +5.5V POWER SUPPLY, 235KBPS, MULTICHANNAEL RS-232 LINE DRIVERS/RECEIVERS数据手册UTC规格书

描述 Description

The UTC UT3243A consists of 3 drivers and 5 receivers. It meetsElA/TIA-232 and V.28/V.24 specifications, it intended for notebookcomputer applications. A high-efficiency, dual charge-pumps powersupply and a low-dropout transmitter combine to deliver true RS-232performance from a single +3.0V ~ +5.5V power supply. Aguaranteed data rate of 120kbps provides compatibility with popularsoftware for communicating with PCs. The UTC UT3243A achieves 1µA supply current in shutdown condition. When the UT3243A doesn’t detect avalid signal level on its receiver inputs, the on-board power supply and drivers will shutdown, and when a valid levelis applied to any RS-232 receiver input, then the system turns on again. Therefore, the system saves power withoutchanges to the existing BIOS or operating system.The UTC UT3243A requires only 0.1µF capacitors in 3.3V operation, and can operate from input voltages rangingfrom +3.0V ~ +5.5V. It is ideal for 3.3V-only systems, 5.0V-only systems, or mixed 3.3V and 5.0V systems thatrequire true RS-232 performance.The UTC UT3243A includes one complementary always-active receiver that can monitor an external device (suchas a modem) in shutdown, without forward biasing the protection diodes in a UART that may have VCC completelyremoved.

特性 Features

Operates With 3.0V ~ 5.5V Power Supply Three Drivers and Five Receivers Operates Up To 235 kbps Designed to Transmit at a Data Rate of 235 kbps Low Standby Current (1uA Typical) External Capacitors (4×0.1µF) Accepts 5.0V Logic Input With 3.3V Supply Always-Active Non-inverting Receiver Output (R2OUTB) Serial-Mouse Drivability ESD(HBM) Protected ±8KV(MIN.) for RS-232 Pins