MAX214 19-0199 Rev 1 8/95 Programmable DTE/DCE, +5V RS-232 Transceiver General Description Features The MAX214 +5V RS-232 transceiver provides a com- Eliminates Null Modem Cables plete, 8-line, software-configurable, DTE or DCE port Programmable DTE or DCE Serial Port RS-232 interface. Tx, Rx, RTS, CTS, DTR, DSR, DCD, and RI circuits can be configured as either Data 1F Charge-Pump Capacitors Terminal Equipment (DTE) or Data Circuit-Terminating Equipment (DCE) using the DTE/DCE control pin. The 116kbps Data RateGuaranteed MAX214 eliminates the need to swap cables when 20A Shutdown Mode switching between DTE and DCE configurations. Receivers Active in Shutdown Applications AT-Compatible Laptop Computers Ordering Information AT-Compatible Desktop Computers PART TEMP. RANGE PIN-PACKAGE Modems, Printers, and Other Peripherals MAX214CPI 0C to +70C 28 Plastic DIP MAX214CWI 0C to +70C 28 Wide SO Typical Operating Circuit MAX214C/D 0C to +70C Dice* MAX214EPI -40C to +85C 28 Plastic DIP MAX214EWI -40C to +85C 28 Wide SO +5V * Dice are specified at TA = +25C. 1F 16 1F 27 V CC Pin Configuration C1+ 15 1F V+ 28 C1- 1 MAX214 C2+ 14 1F TOP VIEW V- 2 C2- 1F 5 TA DTE TRA 9 1 28 C1- C2+ DCE C2- 2 27 C1+ 6 RA RTA 10 DTE 3 26 SHDN HI-Z 20 25 TB DTE TRB 4 25 N.C. TB DCE TC TA 5 24 23 RB RTB 19 MAX214 DTE RA 6 23 RB 24 TC TRC 18 DTE RDC 7 22 RC DCE RE 8 21 DTE/DCE 22 RC RTC 17 DTE TRA 9 20 TRB DCE DCE 7 RDC 11 RDTC 10 19 RTB RTA DTE DTE 18 TRC RDTC 11 8 RE RRE 12 RRE 12 17 RTC 21 DTE/DCE GND 13 16 V 26 CC SHDN 3 V- 14 15 V+ HI-Z GND DIP/SO 13 Maxim Integrated Products 1 Call toll free 1-800-998-8800 for free samples or literature.Programmable DTE/DCE, +5V RS-232 Transceiver ABSOLUTE MAXIMUM RATINGS V ...........................................................................-0.3V to +6V Continuous Power Dissipation (TA = +70C) CC Input Voltages Plastic DIP (derate 9.09mW/C above +70C) .............727mW T , DTE/DCE, SHDN HI-Z ......................-0.3V to (V + 0.3V) Wide SO (derate 12.50mW/C above +70C) ............1000mW IN CC R ....................................................................................15V Operating Temperature Ranges: IN Output Voltages: MAX214C I ..............................................0C to +70C T ..................................................................................15V MAX214E I ..........................................-40C to +85C OUT R ........................................................-0.3V to (V + 0.3V) Storage Temperature Range......................-65C to +150C OUT CC Short-Circuit (one output at a time) Lead Temperature (soldering, 10sec) .......................+300C T to GND ...........................................................Continuous OUT R to GND...........................................................Continuous OUT 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 = 4.5V to 5.5V, C1 to C4 = 1m F, T = T to T , unless otherwise noted.) CC A MIN MAX PARAMETER CONDITIONS MIN TYP MAX UNITS RS-232 TRANSMITTERS Logic Input Threshold Low 0.8 1.4 V Logic Input Threshold High 1.4 2.0 V Normal operation 110 50 mA Logic Input Pull-Up Current Shutdown 0.01 1 Output Voltage Swing All transmitter outputs loaded with 3kW to ground 5.0 7.5 V W Transmitter Output Resistance V = V+ = V- = 0V, V = 2V (Note 1) 300 300k CC OUT Output Short-Circuit Current V = 0V 7 25 mA OUT RS-232 RECEIVERS Input Voltage Operating Range 15 V Positive Threshold Input Low TA = +25C, VCC = 5V, normal operation, SHDN = 0V 0.8 1.3 V Positive Threshold Input High TA = +25C, VCC = 5V, normal operation, SHDN = 0V 1.8 2.4 V V = 5V, normal operation, SHDN = 0V (no hysteresis Positive Threshold Input CC 0.2 0.5 1.0 V in shutdown) Hysteresis Normal operation, SHDN = 0V -2.6 -1.9 Negative Threshold Input Low T = +25C, V = 5V V A CC Shutdown, SHDN = 5V 0.8 1.3 Normal operation, SHDN = 0V -1.5 -0.2 Negative Threshold Input High T = +25C, V = 5V V A CC Shutdown, SHDN = 5V 1.3 2.4 V = 5V, normal operation, SHDN = 0V (no hysteresis Negative Threshold Input CC 0.2 0.4 1.0 V in shutdown) Hysteresis HI-Z = 0V and SHDN = 0V 35 7 Input Resistance kW HI-Z = 5V or SHDN = 5V 100 300 TTL/CMOS Output Voltage Low I = 3.2mA 0.2 0.4 V OUT TTL/CMOS Output Voltage High IOUT = -1.0mA 3.5 VCC - 0.2 V 2 MAX214