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MAX3318EUP+

更新时间： 2024-11-13 13:10:31
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19-1751; Rev 0; 6/00  
2.5V, 1µA, 460kbps,  
RS-232-Compatible Transceivers  
General Description  
Features  
o AutoShutdown Plus (MAX3318/MAX3319)  
The MAX3316–MAX3319 transceivers have a proprietary  
low-dropout transmitter output stage enabling RS-232-  
compatible performance from +2.25V to +3.0V with a  
dual-charge pump. These devices require only four  
0.1µF capacitors, and are guaranteed to operate at data  
rates up to 460kbps.  
o 300µA Operating Supply Current  
o 1µA Low-Power Shutdown with Receivers Active  
o Guaranteed 460kbps Data Rate  
o Guaranteed 4V/µs Slew Rate  
The MAX3318/MAX3319 achieve a 1µA supply current  
using Maxim’s revolutionary AutoShutdown Plus™ fea-  
ture. These devices automatically enter a low-power  
shutdown mode when the RS-232 cable is disconnected  
or the transmitters of the connected peripherals are inac-  
tive for more than 30 seconds. They turn on again when  
they sense a valid transition at any transmitter or receiver  
input. AutoShutdown Plus saves power without changes  
to the existing BIOS or operating system. The MAX3318  
is a 2-Tx/2-Rx device while the MAX3319 is a 1-Tx/1-Rx  
device. These devices also feature a logic-level output  
(READY) that asserts when the charge pump is regulat-  
ing and the device is ready to begin transmitting.  
o RS-232 Compatible Down to 2.25V  
Ordering Information  
PART  
TEMP. RANGE  
0°C to +70°C  
0°C to +70°C  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
20 TSSOP  
16 SSOP  
MAX3316CUP  
MAX3316CAE  
MAX3316EUP  
MAX3316EAE  
20 TSSOP  
16 SSOP  
Ordering Information continued at end of data sheet.  
Typical Application Circuits  
+2.5V  
The MAX3316/MAX3317 are 2-Tx/2-Rx transceivers. The  
MAX3317 features a 1µA shutdown mode that can be  
entered by driving SHDN low. The MAX3317’s receivers  
remain active while in shutdown mode, allowing external  
devices such as modems to be monitored using only  
1µA supply current.  
These devices are available in space-saving packages:  
MAX3316 (16-pin SSOP and 20-pin TSSOP), MAX3317/  
MAX3318 (20-pin SSOP and 20-pin TSSOP), and  
MAX3319 (16-pin SSOP).  
15  
0.1 F  
C
BYPASS  
V
CC  
3
7
2
C1+  
V+  
V-  
C1  
0.1 F  
C3  
0.1 F  
4
5
6
C1-  
C2+  
MAX3319  
C4  
0.1 F  
C2  
0.1 F  
C2-  
RS-232-  
COMPATIBLE  
OUTPUT  
11  
T1IN  
T1OUT 13  
CMOS  
INPUT  
________________________Applications  
RS-232-  
COMPATIBLE  
INPUT  
Palmtop Computers  
Hand-Held Instruments  
Pagers  
9
R1OUT  
R1IN  
5k  
8
CMOS  
OUTPUT  
Cellular Phones  
GPS  
TO POWER-  
MANAGEMENT  
UNIT  
READY  
INVALID 10  
1
AutoShutdown  
Plus  
Handy Terminals  
Hand-Held Electronic Books  
FORCEOFF  
FORCEON  
16  
12  
V
CC  
GND  
14  
AutoShutdown Plus is a trademark of Maxim Integrated Products.  
Typical Application Circuits continued at end of data sheet.  
Pin Configurations appear at end of data sheet.  
Selector Guide  
NO. OF DRIVERS/  
RECEIVERS  
GUARANTEED  
DATA RATE (kbps)  
AutoShutdown  
PART  
READY OUTPUT  
SHUTDOWN  
Plus  
MAX3316  
MAX3317  
MAX3318  
MAX3319  
2/2  
2/2  
2/2  
1/1  
460  
460  
460  
460  
—
—
ꢀ
—
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ꢀ
ꢀ
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________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at  
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.  
1234567...15

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