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ST3243B

更新时间： 2024-11-20 23:34:39

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		/
页数	文件大小	规格书
11页	277K
描述
3 TO 5.5V 400KBPS. RS-232 TRANSCEIVER WITH AUTO-POWERDOWN

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中文翻译

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数据手册

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ST3243B 数据手册

ST3243

3 TO 5.5V, 400KBPS, RS-232

TRANSCEIVER WITH AUTO-POWERDOWN

■

1µA SUPPLY CURRENT ACHIEVED WHEN

IN AUTO-POWERDOWN

250Kbps MINIMUM GUARANTEED DATA

RATE

■

GUARANTEED 6V/µs SLEW RATE RANGE

GUARANTEED MOUSE DRIVEABILITY

0.1µF EXTERNAL CAPACITORS

MEET EIA/TIA-232 SPECIFICATIONS DOWN

TO 3V

SOP

■

AVAILABLE IN SO-28, SSOP-28 AND

TSSOP28

DESCRIPTION

The ST3243 device consists of 3 drivers, 5

receivers and a dual charge-pump circuit. The

device meets the requirements of EIA/TIA and

V.28/V.24 comunication standards providing high

data rate capability.

SSOP

TSSOP

The receiver R2 is always active to implement a

wake-up feature for serial port.

The ST3243 has a proprietary low-dropout

transmitter output stage enabling true RS-232

performance from a 3.0V to 5.5V supply with a

dual charge pump. The device is guaranteed to

run at data rates of 250kbps while maintaining

RS-232 output levels.

The Auto-powerdown feature functions when

FORCEON is low and FORCEOFF is high. During

this mode of operation, if the device does not

sense a valid RS-232 signal, the driver outputs are

disabled. If FORCEOFF is set low, both drivers

and receivers (expert R2B) are shut off, and

supply current is reduced to 1mA. Disconnecting

the serial port or turning off the peripheral drives

causes the auto-powerdown condition to occur.

Auto-powerdown can be disabled when

FORCEON and FORCEOFF are high, and should

be done when driving a serial mouse. With

Auto-powerdown enabled, the device is activated

automatically when a valid signal is applied to any

receiver input.

Typical application are in notebook, subnotebook,

palmtop computers, battery-powered equipment,

hand-held equipment, peripherals and printers.

May 2002

1/11

12 3 4 5 6 7...11

中文翻译

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