Datasheet > TRSF3221IDBG4

TRSF3221IDBG4

更新时间： 2024-10-03 20:10:07

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TRSF3221IDBG4 数据手册

TRSF3221

3-V TO 5.5-V SINGLE-CHANNEL RS-232 COMPATIBLE LINE DRIVER/RECEIVER

www.ti.com

SLLS857–AUGUST 2007

FEATURES

DB OR PW PACKAGE

•

Operates With 3-V to 5.5-V V_CCSupply

(TOP VIEW)

•

Operates up to 1 Mbit/s

C1+

V+

FORCEOFF

V_CC

Low Standby Current . . . 1 μA Typ

External Capacitors . . . 4 × 0.1 μF

Accepts 5-V Logic Input With 3.3-V Supply

GND

C1−

C2+

C2−

V−

DOUT

RS-232 Bus-Pin ESD Protection Exceeds

±15 kV Using Human-Body Model (HBM)

FORCEON

DIN

•

Auto-Powerdown Feature Automatically

Disables Drivers for Power Savings

INVALID

ROUT

RIN

APPLICATIONS

•

Battery-Powered, Hand-Held, and Portable

Equipment

•

PDAs and Palmtop PCs

Notebooks, Sub-Notebooks, and Laptops

Digital Cameras

Mobile Phones and Wireless Devices

DESCRIPTION/ORDERING INFORMATION

The TRSF3221 consists of one line driver, one line receiver, and a dual charge-pump circuit with ±15-kV IEC

ESD protection pin-to-pin (serial-port connection pins, including GND). The TRSF3221 provides the electrical

interface between an asynchronous communication controller and the serial-port connector. The charge pump

and four small external capacitors allow operation from a single 3-V to 5.5-V supply. The TRSF3221 operates at

data signaling rates up to 1 Mbit/s and a driver output slew rate of 24 V/μs to 150 V/μs.

Flexible control options for power management are available when the serial port is inactive. The

auto-powerdown feature functions when FORCEON is low and FORCEOFF is high. During this mode of

operation, if the TRSF3221 does not sense a valid RS-232 signal on the receiver input, the driver output is

disabled. If FORCEOFF is set low and the enable (EN) input is high, both the driver and receiver are shut off,

and the supply current is reduced to 1 μA. Disconnecting the serial port or turning off the peripheral drivers

causes the auto-powerdown condition to occur. Auto-powerdown can be disabled when FORCEON and

FORCEOFF are high. With auto-powerdown enabled, the device is activated automatically when a valid signal is

applied to the receiver input. The INVALID output notifies the user if an RS-232 signal is present at the receiver

input. INVALID is high (valid data) if the receiver input voltage is greater than 2.7 V or less than –2.7 V, or has

been between –0.3 V and 0.3 V for less than 30 μs. INVALID is low (invalid data) if the receiver input voltage is

between –0.3 V and 0.3 V for more than 30 μs. See Figure 5 for receiver input levels.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...16

中文翻译

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TRSF3221IDBG4 替代型号

型号	品牌	替代类型	描述	数据表
ICL3227EIAZA	INTERSIL	功能相似	【15kV ESD Protected, +3V to +5.5V, 1Microamp,

与TRSF3221IDBG4相关器件

型号	品牌	获取价格	描述	数据表
TRSF3221IPW	TI	获取价格	LINE TRANSCEIVER, PDSO16, GREEN, PLASTIC, TSSOP-16
TRSF3222	TI	获取价格	3-V TO 5.5-V TWO-CHANNEL RS-232 1-Mbit/s LINE
TRSF3222E	TI	获取价格	3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/
TRSF3222ECDB	TI	获取价格	3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/
TRSF3222ECDBG4	TI	获取价格	3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/
TRSF3222ECDBR	TI	获取价格	3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/
TRSF3222ECDBRG4	TI	获取价格	3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/
TRSF3222ECDW	TI	获取价格	3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/
TRSF3222ECDWG4	TI	获取价格	3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/
TRSF3222ECDWR	TI	获取价格	3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/

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