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TRSF3221IDBG4 PDF预览

TRSF3221IDBG4

更新时间： 2024-11-17 20:10:07
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德州仪器 - TI /
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TRSF3221IDBG4 数据手册

 浏览型号TRSF3221IDBG4的Datasheet PDF文件第2页浏览型号TRSF3221IDBG4的Datasheet PDF文件第3页浏览型号TRSF3221IDBG4的Datasheet PDF文件第4页浏览型号TRSF3221IDBG4的Datasheet PDF文件第5页浏览型号TRSF3221IDBG4的Datasheet PDF文件第6页浏览型号TRSF3221IDBG4的Datasheet PDF文件第7页 
TRSF3221  
3-V TO 5.5-V SINGLE-CHANNEL RS-232 COMPATIBLE LINE DRIVER/RECEIVER  
www.ti.com  
SLLS857–AUGUST 2007  
1
FEATURES  
DB OR PW PACKAGE  
•
Operates With 3-V to 5.5-V VCC Supply  
(TOP VIEW)  
•
•
•
•
•
Operates up to 1 Mbit/s  
EN  
C1+  
V+  
FORCEOFF  
VCC  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
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.  
1
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.  
Copyright © 2007, Texas Instruments Incorporated  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
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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,

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