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SN65C3221-Q1

更新时间： 2024-02-26 06:52:57
品牌 Logo 应用领域
德州仪器 - TI 驱动器
页数 文件大小 规格书
15页 271K
描述
3-V TO 5.5V SINGLE-CHANNEL RS-232 COMPATIBLE LINE DRIVER/RECEIVER

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中文翻译

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SN65C3221-Q1 数据手册

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SLLS616B − APRIL 2004 − REVISED APRIL 2008  
DB or PW PACKAGE  
(TOP VIEW)  
D
Qualified for Automotive Applications  
D
D
D
D
D
D
Operates With 3-V to 5.5-V V Supply  
CC  
Operates Up To 1 Mbit/s  
EN  
FORCEOFF  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
Low Standby Current . . . 1 µA Typical  
External Capacitors . . . 4 × 0.1 µF  
C1+  
V+  
V
CC  
GND  
C1−  
C2+  
C2−  
V−  
DOUT  
FORCEON  
DIN  
Accepts 5-V Logic Input With 3.3-V Supply  
RS-232 Bus-Pin ESD Protection Exceeds  
15 kV Using Human-Body Model (HBM)  
INVALID  
ROUT  
D
D
Auto-Powerdown Feature Automatically  
Disables Drivers for Power Savings  
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 SN65C3221 consists of one line driver, one line receiver, and a dual charge-pump circuit with 15-kV ESD  
protection pin to pin (serial-port connection pins, including GND). This device 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. This device 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 device does not sense a valid RS-232 signal on the receiver input, the driver output is disabled.  
If FORCEOFF is set low and EN 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.  
{
ORDERING INFORMATION  
ORDERABLE  
PART NUMBER  
TOP-SIDE  
MARKING  
‡
T
A
PACKAGE  
TSSOP (PW)  
SSOP (DB)  
Reel of 2000  
Reel of 2000  
SN65C3221IPWRQ1  
SN65C3221IDBRQ  
3221Q1  
3221Q1  
−40°C to 85°C  
†
‡
For the most current package and ordering information, see the Package Option Addendum at the end of this  
document, or see the TI web site at http://www.ti.com.  
Package drawings, thermal data, and symbolization are available at http://www.ti.com/packaging.  
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.  
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Copyright 2008, Texas Instruments Incorporated  
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1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567...15

中文翻译

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