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MAX221

Maxim
Part Number MAX221
Manufacturer Maxim
Description Single RS-232 Transceiver
Published May 6, 2005
Detailed Description 19-1520; Rev 0; 8/99 MAX221 +5V, 1µA, Single RS-232 Transceiver with AutoShutdown General Description The MAX221 is a...
Datasheet PDF File MAX221 PDF File

MAX221
MAX221

Overview
19-1520; Rev 0; 8/99 MAX221 +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 automatic 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 lowpower shutdown mode when the RS-232 cable is disconnected, 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 connected, signaling the host that a peripheral is connected 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 C15 C2+ 6 C211 TIN 15 VCC MAX221 3 V+ C3 0.
1µF 7 VTOUT 13 C4 0.
1µF 9 ROUT RIN 8 5k 1 EN 12 FORCEON GND 14 INVALID 10 FORCEOFF 16 TO POWERMANAGEMENT UNIT VCC AutoShutdown is a trademark of Maxim Integrated Products.
CAPACITORS MAY BE POLARIZED OR UNPOLARIZED.
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