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MAX3223CDB

更新时间： 2024-11-22 23:46:07
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Transceiver

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MAX3223CDB 数据手册

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MAX3223  
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER  
SLLS409C – JANUARY 2000 – REVISED DECEMBER 2001  
DB, DW, OR PW PACKAGE  
Meets or Exceeds the Requirements of  
TIA/EIA-232-F and ITU v.28 Standards  
(TOP VIEW)  
Operates With 3-V to 5.5-V V  
Operates up to 250 kbit/s  
Supply  
CC  
EN  
C1+  
V+  
C1–  
C2+  
FORCEOFF  
1
2
3
4
5
6
7
8
9
10  
20  
19  
18  
17  
16  
15  
14  
V
CC  
GND  
DOUT1  
RIN1  
ROUT1  
FORCEON  
Low Standby Current . . . 1 µA Typical  
External Capacitors . . . 4 × 0.1 µF  
Accepts 5-V Logic Input With 3.3-V Supply  
C2–  
V–  
Designed to Be Interchangeable With  
Maxim MAX3223  
DOUT2  
RIN2  
ROUT2  
13 DIN1  
12 DIN2  
RS-232 Bus-Pin ESD Protection Exceeds  
±15 kV Using Human-Body Model (HBM)  
11  
INVALID  
Applications  
– Battery-Powered Systems, PDAs,  
Notebooks, Laptops, Palmtop PCs, and  
Hand-Held Equipment  
Package Options Include Plastic  
Small-Outline (DW), Shrink Small-Outline  
(DB), and Thin Shrink Small-Outline (PW)  
Packages  
description  
The MAX3223 consists of two line drivers, two line receivers, and a dual charge-pump circuit with ±15-kV ESD  
protection pin to pin (serial-port connection pins, including GND). The device meets the requirements of  
TIA/EIA-232-F and 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 device operates at data signaling rates up to 250 kbit/s and a maximum of 30-V/µs  
driver output slew rate.  
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, the driver outputs are disabled. If FORCEOFF  
is set low and EN is high, both drivers and receivers are shut off, and the supply current is reduced to 1 µA.  
Disconnecting the serial port or turning off the peripheral drivers causes auto-powerdown 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 any receiver input. The INVALID output  
is used to notify the user if an RS-232 signal is present at any receiver input. INVALID is high (valid data) if any  
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. Refer to Figure 4 for receiver input levels.  
The MAX3223C is characterized for operation from 0°C to 70°C. The MAX3223I is characterized for operation  
from –40°C to 85°C.  
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.  
Copyright 2001, Texas Instruments Incorporated  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of Texas Instruments  
standard warranty. Production processing does not necessarily include  
testing of all parameters.  
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567...11

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