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SN75C3221EPWE4

更新时间： 2024-02-23 00:00:07
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德州仪器 - TI 驱动器
页数 文件大小 规格书
17页 198K
描述
3-V TO 5.5-V SINGLE-CHANNEL RS-232 1-Mbit/s LINE DRIVER/RECEIVER WITH 【15-kV IEC ESD PROTECTION

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SN75C3221EPWE4 数据手册

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SN65C3221E, SN75C3221E  
3-V TO 5.5-V SINGLE-CHANNEL RS-232 1-Mbit/s LINE DRIVER/RECEIVER  
WITH ±15-kV IEC ESD PROTECTION  
www.ti.com  
SLLS694A–NOVEMBER 2005–REVISED DECEMBER 2005  
FEATURES  
DB OR PW PACKAGE  
•
ESD Protection for RS-232 Pins  
(TOP VIEW)  
– ±15-kV Human-Body Model (HBM)  
– ±8-kV IEC 61000-4-2 Contact Discharge  
– ±15-kV IEC 61000-4-2 Air-Gap Discharge  
Operate With 3-V to 5.5-V VCC Supply  
Operate up to 1 Mbit/s  
EN  
C1+  
V+  
FORCEOFF  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
V
CC  
GND  
•
•
•
•
•
•
C1−  
C2+  
C2−  
V−  
DOUT  
FORCEON  
DIN  
Low Standby Current . . . 1 µA Typ  
External Capacitors . . . 4 × 0.1 µF  
Accepts 5-V Logic Input With 3.3-V Supply  
INVALID  
ROUT  
RIN  
RS-232 Bus-Pin ESD Protection Exceeds ±15  
kV Using Human-Body Model (HBM)  
•
Auto-Powerdown Feature Automatically  
Disables Drivers for Power Savings  
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 SN65C3221E and SN75C3221E consist 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). These devices provide  
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. These devices  
operate 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 devices do 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.  
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 © 2005, 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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