MAX221

V_CC ....................................................................-0.3V to +6V
V+ ..........................................................(V_CC - 0.3V) to +14V
V- .....................................................................-14V to +0.3V
Input Voltages
TIN ..........................................................-0.3V to (V+ + 0.3V)
RIN.................................................................................±30V
FORCEON, FORCEOFF, EN......................-0.3V to (V_CC + 0.3V)
Output Voltages
TOUT ................................................(V- - 0.3V) to (V+ + 0.3V)
ROUT, INVALID........................................-0.3V to (V_CC + 0.3V)
Short-Circuit Duration, TOUT .................................Continuous
Continuous Power Dissipation (T_A = +70°C)
TSSOP (derated 6.7mW/°C above +70°C) ................533mW
SSOP (derated 7.1mW/°C above +70°C) ..................571mW
Operating Temperature Range
MAX221C_ _ .....................................................0°C to +70°C
MAX221E_ _ ..................................................-40°C to +85°C
Maximum Junction Temperature ................................. +150°C
Storage Temperature Range ...................... -65°C to +150°C
Lead Temperature (soldering, 10sec) ......................... +300°C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

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 1A 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 theINVALID 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.