MAX221E 19-1527 Rev 0 8/99 15kV ESD-Protected, +5V, 1A, Single RS-232 Transceiver with AutoShutdown General Description Features The MAX221E is a +5V powered, single transmit/ Single RS-232 Transceiver in a Small 16-Pin TSSOP receive RS-232 and V.28 communications interface with ESD Protection for RS-232 I/O Pins automatic shutdown/wake-up features and high data 15kVHuman Body Model rate capabilities. 8kVIEC 1000-4-2, Contact Discharge The MAX221E features enhanced electrostatic discharge 15kVIEC 1000-4-2, Air-Gap Discharge (ESD) protection. Both the transmitter output and receiver input are protected to 15kV using the IEC 1000-4-2 Air- Latchup Free Gap Discharge Method, to 8kV using the IEC 1000-4-2 1A Supply Current Contact Discharge Method, and to 15kV using the Human Body Model. AutoShutdown Saves Power without Changes The MAX221E achieves a low 1A supply current with to BIOS Maxims revolutionary AutoShutdown feature. Guaranteed 250kbps Data Rate 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 Ordering Information peripheral is off. The MAX221E wakes up and drives the INVALID pin high when an active RS-232 cable is con- PART TEMP. RANGE PIN-PACKAGE nected, signaling the host that a peripheral is connected MAX221ECUE 0C to +70C 16 TSSOP to the communications port. MAX221ECAE 0C to +70C 16 SSOP The MAX221E is available in a 16-pin SSOP package as MAX221EEUE 40C to +85C 16 TSSOP well as a 16-pin TSSOP that uses 50% less board space MAX221EEAE 40C to +85C 16 SSOP than a 16-pin SO. Applications Typical Operating Circuit Maintenance/Diagnostic Ports Industrial Systems +5V 15 Telecommunications C3 C BYPASS 0.1F V 0.1F CC Set-Top Boxes 3 2 C1+ V+ C1 0.1F 4 Pin Configuration C1- MAX221E 7 5 C2+ V- C4 C2 TOP VIEW 0.1F 6 0.1F C2- EN 1 16 FORCEOFF 11 TIN TOUT 13 C1+ 2 15 V CC V+ 3 14 GND 9 ROUT RIN 8 C1- 4 MAX221E 13 TOUT 5k C2+ 5 12 FORCEON C2- 6 11 TIN TO POWER- 10 1 V- 7 10 INVALID EN MANAGEMENT INVALID UNIT RIN 8 9 ROUT 12 16 FORCEOFF V FORCEON CC GND TSSOP/SSOP 14 CAPACITORS MAY BE AutoShutdown is a trademark of Maxim Integrated Products. POLARIZED OR UNPOLARIZED. Maxim Integrated Products 1 For free samples & the latest literature: 15kV ESD-Protected, +5V, 1A, Single RS-232 Transceiver with AutoShutdown ABSOLUTE MAXIMUM RATINGS V ..........................................................................-0.3V to +6V Short-Circuit Duration, TOUT .....................................Continuous CC V+ ...............................................................(V - 0.3V) to +14V Continuous Power Dissipation (T = +70C) CC A V- ...........................................................................-14V to +0.3V 16-Pin TSSOP (derated 6.7mW/C above +70C) .......533mW Input Voltages 16-Pin SSOP (derated 7.1mW/C above +70C) .........571mW TIN............................................................-0.3V to (V+ + 0.3V) Operating Temperature Range RIN...................................................................................30V MAX221EC ...................................................0C to +70C FORCEON, FORCEOFF, EN ..................-0.3V to (V + 0.3V) MAX221EE ..................................................-40C to +85C CC Output Voltages Maximum Junction Temperature .................................... +150C TOUT ................................................(V- - 0.3V) to (V+ + 0.3V) Storage Temperature Range ........................... -65C to +150C ROUT, INVALID......................................-0.3V to (V + 0.3V) Lead Temperature (soldering, 10sec) ............................ +300C CC 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. ELECTRICAL CHARACTERISTICS (V = +5V 10%, C1C4 = 0.1F, T = T to T , unless otherwise noted. Typical values are at T = +25C.) CC A MIN MAX A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC CHARACTERISTICS V Supply Current I No load, T = +25C 510 mA CC CC A Shutdown Supply Current I T = +25C, Figure 1 110 A SHDN A AutoShutdown Supply Current I 110 A AS LOGIC INPUTS Input Leakage Current TIN = 0 to V 1 A CC Input Threshold Low V TIN, EN, FORCEOFF, FORCEON 0.8 V IL Input Threshold High V EN, FORCEOFF, TIN 2.4 V IH Output Voltage Low V ROUT I = 3.2mA 0.4 V OL SINK Output Voltage High V ROUT I = 1.0mA 3.5 V OH SOURCE Output Leakage Current EN = V , 0 ROUT V 0.05 10 A CC CC AUTOSHUTDOWN Positive threshold 2.7 Receiver Input Threshold, Figure 3 V Transmitter Enabled Negative threshold -2.7 Receiver Input Threshold, I = 1A, Figure 3 -0.3 0.3 V CC Transmitter Disabled INVALID Output Voltage Low I = 1.6mA 0.4 V SINK I = 1.0mA V - 0.6 V INVALID Output Voltage High SOURCE CC Receiver Threshold to t Figure 3 250 s WU Transmitter Enabled Receiver Positive or Negative t Figure 3 1 s INVH Threshold to INVALID High Receiver Positive or Negative t Figure 3 30 s INVL Threshold to INVALID Low 2 MAX221E