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MAX221 View Datasheet(PDF) - Maxim Integrated

Part Name
Description
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MAX221 Datasheet PDF : 8 Pages
1 2 3 4 5 6 7 8
19-1520; Rev 0; 8/99
+5V, 1µA, Single RS-232 Transceiver
with AutoShutdown
General Description
The MAX221 is a +5V-powered, single transmit/receive
RS-232 and V.28 communications interface with auto-
matic shutdown/wake-up features and high data rate
capabilities.
The MAX221 achieves a low 1µA supply current with
Maxim’s revolutionary AutoShutdown™ feature.
AutoShutdown saves power without changes to the
existing BIOS or operating system by entering low-
power shutdown mode when the RS-232 cable is dis-
connected, or when the transmitter of the connected
peripheral is off. The MAX221 wakes up and drives the
INVALID pin high when an active RS-232 cable is con-
nected, signaling the host that a peripheral is connect-
ed to the communications port.
The MAX221 is available in a 16-pin SSOP package as
well as a 16-pin TSSOP that uses 50% less board space
than a 16-pin SO. For an equivalent RS-232 transceiver
with enhanced ±15kV ESD protection, refer to the
MAX221E data sheet.
Applications
Maintenance/Diagnostic Ports
Industrial Systems
Telecommunications
Set-Top Boxes
Features
o Single RS-232 Transceiver in a Small 16-Pin
TSSOP Package
o 1µA Supply Current
o AutoShutdown Saves Power Without
Changes to BIOS
o Guaranteed 250kbps Data Rate
PART
MAX221CUE
MAX221CAE
MAX221EUE
MAX221EAE
Ordering Information
TEMP. RANGE
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 TSSOP
16 SSOP
16 TSSOP
16 SSOP
Typical Operating Circuit
Pin Configuration
TOP VIEW
EN 1
C1+ 2
V+ 3
C1- 4
C2+ 5
C2- 6
V- 7
RIN 8
MAX221
16 FORCEOFF
15 VCC
14 GND
13 TOUT
12 FORCEON
11 TIN
10 INVALID
9 ROUT
TSSOP/SSOP
+5V
CBYPASS
C1
0.1µF
C2
0.1µF
0.1µF
2 C1+
4 C1-
5 C2+
6 C2-
11 TIN
15
VCC
MAX221
3
V+
C3
0.1µF
7
V-
TOUT 13
C4
0.1µF
9 ROUT
RIN 8
5k
1 EN
12 FORCEON
GND
14
INVALID 10
FORCEOFF 16
TO POWER-
MANAGEMENT
UNIT
VCC
AutoShutdown is a trademark of Maxim Integrated Products.
CAPACITORS MAY BE POLARIZED OR UNPOLARIZED.
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
 

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