SP385E-1

SP385E-1 SIPEX | Alldatasheet

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Rev. 07/26/02 SP385E-1 True +3V to +5V RS-232 Line Driver/Receiver © Copyright 2001 Sipex Corporation SP385E-1 ■ Operates from 3.3V or 5V Power Supply ■ Meets True EIA/TIA-232-F Standards from a +3.0V to +5.5V Power Supply ■ Meets EIA-562 Specifications at VCC ≥ 2.7V ■ Two Drivers and Receivers ■ Operates with 0.1µF Capacitors ■ High Data Rate — 120kbps Under Load ■ Low Power Shutdown ≤1µA ■ 3-State TTL/CMOS Receiver Outputs ■ Low Power CMOS — <1mA Operation ■ Improved ESD Specifications: +15kV Human Body Model +15kV IEC1000-4-2 Air Discharge +8kV IEC1000-4-2 Contact Discharge

DESCRIPTION

The Sipex SP385E-1 is an enhanced version of the Sipex SP200 family of RS232 line drivers/receivers. The SP385E-1 offers +3.3V operation for EIA-562 and EIA-232 applica- tions. The SP385E-1 maintains the same performance features offered in its predecessors. The SP385E-1 is available in plastic SOIC or SSOP packages operating over the commercial and industrial temperature ranges. The SP385E-1 is pin compatible to the LTC1385 EIA-562 transceiver, except the drivers in the SP385E-1 can only be disabled with the ON/OFF pin. True +3V or +5V RS-232 Line Driver/Receiver R 2R1 T2T1 TTL/CMOS INPUTS RS232 OUTPUTS TTL/CMOS OUTPUTS RS232 INPUTS Charge Pumps

Rev. 07/26/02 SP385E-1 True +3V to +5V RS-232 Line Driver/Receiver © Copyright 2002 Sipex Corporation SPECIFICATIONS VCC = +3.3V ± 10%; cap on (V+) and (V-) = 1.0µF, C1 = C2 = 0.1µF; TMIN to TMAX unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS TTL INPUT Logic Threshold Low 0.8 Volts T IN ; ON/OFF Vcc = 3.3V High 2.0 Volts T IN ; ON/OFF Vcc = 3.3V Logic Pullup Current 0.01 200 µAT IN = 0V Maximum Data Rate 120 kbps C L = 2500pF, RL= 3kΩ TTL OUTPUT TTL/CMOS Output Voltage, Low 0.4 Volts I OUT = 1.6mA; Vcc = 3.3V Voltage, High V CC -0.6 Volts I OUT = -1.0mA Leakage Current; TA = +25°C 0.05 ±10 µA ON/OFF=0V , 0 ≤ VOUT ≤ VCC EIA-562 OUTPUT Output Voltage Swing ±3.7 ±4.2 Volts All transmitter outputs loaded with 3kΩ to ground Power-Off Output Resistance 300 Ω VCC = 0V; VOUT = ±2V Output Short Circuit Current ±35 mA Infinite duration EIA-562 INPUT Voltage Range -15 +15 Volts Voltage Threshold Low 0.6 1.2 Volts V CC = 3.3V, TA = +25°C High 1.5 2.4 Volts V CC = 3.3V, TA = +25°C Hysteresis 0.5 1.0 Volts V CC = 3.3V, TA = +25°C Resistance 3 5 7 k Ω VIN = 15V to –15V DYNAMIC CHARACTERISTICS Driver Propagation Delay 1.0 µs TTL to RS-562 Receiver Propagation Delay 0.3 µs RS-562 to TTL Instantaneous Slew Rate 30 V/ µsC L = 10pF, RL= 3kΩ - 7kΩ; TA = +25°C Transition Region Slew Rate 10 V/ µsC L = 2500pF, RL= 3kΩ; measured from +2V to -2V or -2V to +2V Output Enable Time 200 ns Output Disable Time 200 ns POWER REQUIREMENTS VCC Power Supply Current 0.5 6 mA No load, TA= +25°C; VCC = 3.3V 8m A All transmitters RL = 3kΩ TA = +25°C Shutdown Supply Current 0.010 5 µAV CC = 3.3V, TA = +25°C ABSOLUTE MAXIMUM RATINGS This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. V Input Voltages Output Voltages Short Circuit Duration Power Dissipation (derate 9.5mW/°C above +70°C) (derate 7mW/°C above +70°C) (derate 7mW/°C above +70°C)

Rev. 07/26/02 SP385E-1 True +3V to +5V RS-232 Line Driver/Receiver © Copyright 2001 Sipex Corporation SPECIFICATIONS VCC = +3.3V ± 10%; cap on (V+) and (V-) = 1.0µF, C1 = C2 = 0.1µF; TMIN to TMAX unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS TTL INPUT Logic Threshold Low 0.8 Volts T IN ; ON/OFF High 2.4 Volts T IN ; ON/OFF Logic Pullup Current 0.01 200 µAT IN = 0V Maximum Data Rate 120 kbps C L = 2500pF, RL= 3kΩ TTL OUTPUT TTL/CMOS Output Voltage, Low 0.4 Volts I OUT = 1.6mA; Vcc = +5V Voltage, High V CC -0.6 Volts I OUT = -1.0mA Leakage Current; TA = +25°C 0.05 ±10 µA EN = VCC , 0V ≤ VOUT ≤ VCC EIA-232 OUTPUT Output Voltage Swing ±5 ±9 Volts All transmitter outputs loaded with 3kΩ to ground. Power-Off Output Resistance 300 Ω VCC = 0V; VOUT = ±2V Output Short Circuit Current ±35 mA Infinite duration EIA-562 INPUT Voltage Range -15 +15 Volts Voltage Threshold Low 0.8 1.5 Volts V CC = 5V, TA = +25°C High 1.8 2.4 Volts V CC = 5V, TA = +25°C Hysteresis 0.5 1.0 Volts V CC = 5V, TA = +25°C Resistance 3 5 7 k Ω VIN = 15V to –15V DYNAMIC CHARACTERISTICS Propagation Delay, RS-232 to TTL 1 µs TTL to RS-562 Instantaneous Slew Rate 30 V/ µsC L = 10pF, RL= 3kΩ - 7kΩ; TA =+25°C Transition Region Slew Rate 10 V/ µsC L = 2500pF, RL= 3kΩ; measured from +3V to -3V or -3V to +3V Output Enable Time 200 ns Output Disable Time 200 ns POWER REQUIREMENTS VCC Power Supply Current 0.5 15 mA No load, TA= +25°C; VCC = 5V 25 mA All transmitters R L = 3kΩ; TA = +25°C Shutdown Supply Current 1 10 µAV CC = 5V, TA = +25°C PERFORMANCE CURVES 05 1 0 15 20 Load Current (mA) V+ (Volts) 25 30 35 40 VCC = 4V VCC = 5V -55 -40 0 25 70 85 125 Temperature (°C) 30ICC (mA) VCC = 5V VCC = 4V VCC = 3V VCC (Volts) 6.8 7.4 7.6 7.8 8.0 8.2 8.4 VOH (Volts) 7.0 7.2 Load current = 0mA TA = 25°C 0246 8 1 0 1 2 1 4 Load Current (mA) V– Voltage (Volts) -10 -11 VCC = 5V VCC = 4V

Rev. 07/26/02 SP385E-1 True +3V to +5V RS-232 Line Driver/Receiver © Copyright 2002 Sipex Corporation PINOUT TYPICAL OPERATING CIRCUIT 18-pin SOIC 20-pin SSOP ON/OFF V GND T OUT R IN R OUT T IN T IN R OUT N/C C + C - C + C - T OUT R IN CC ON/OFF V GND T OUT R IN R OUT T IN T IN R OUT N/C N/C C + C - C + C - T OUT R IN N/C 1 CC 10 9 R INR OUT2 13 14 R INR OUT1 11 8 T OUT2 12 15 T OUT1 400kΩ 400kΩ TTL/CMOS INPUTS RS232 OUTPUTS C V +0.1µF 6.3V +5V INPUT TTL/CMOS OUTPUTS RS232 INPUTS2 5kΩ 0.1µF 16V 5kΩ C ++0.1µF 16V +5V to +10V Voltage Doubler 0.1µF SP385E-1

18 ON/OFF

0.1µF 16V +10V to -10V Voltage Inverter V- T IN2 T IN1 GND 12 9 R INR OUT2 15 16 R INR OUT1 13 8T IN2 T OUT2 14 17T IN1 T OUT1 18GND 400kΩ 400kΩ TTL/CMOS INPUTS RS232 OUTPUTS C Vcc V +0.1µF 6.3V +5V to +10V Voltage Doubler +5V INPUT V TTL/CMOS OUTPUTS RS232 INPUTS 5kΩ 0.1µF 16V 5kΩ C ++0.1µF 16V +10V to -10V Voltage Inverter 0.1µF SP385E-1

20 ON/OFF

0.1µF 16V

Rev. 07/26/02 SP385E-1 True +3V to +5V RS-232 Line Driver/Receiver © Copyright 2001 Sipex Corporation FEATURES… The Sipex SP385E-1 is a +3V to +5V EIA-232/ EIA-562 line transceiver. It is a pin-for-pin alternative for the SP310A and will operate in the same socket with 0.1µF capacitors, either polarized or non–polarized, in +3V supplies. The SP385E-1 offers the same features such as 120kbps guaranteed transmission rate, increased drive current for longer and more flexible cable configurations, low power dissipation and overall ruggedized construction for commercial and industrial environments. The SP385E-1 also includes a shutdown feature that tri-states the drivers and the receivers. The SP385E-1 includes a charge pump voltage converter which allows it to operate from a single +3.3V or +5V supply. These converters double the V CC voltage input in order to generate the EIA-232 or EIA-562 output levels. For +5V operation, the SP385E-1 driver outputs adhere to all EIA-232-F and CCITT V.28 specifications. While at +3.3V operation, the outputs adhere to EIA-562 specifica- tions. Due to Sipex's efficient charge pump design, the charge pump levels and the driver outputs are less noisy than other 3V EIA-232 transceivers. The SP385E-1 has a single control line which simultaneously shuts down the internal DC/DC converter and puts all transmitter and receiver outputs into a high impedance state. The SP385E-1 is available in 18-pin plastic SOIC and 20-pin plastic SSOP packages for operation over commercial and industrial temperature ranges. Please consult the factory for surface-mount packaged parts supplied on tape-on-reel as well as parts screened to MIL- M-38510. The SP385E-1 is ideal for +3.3V battery applications requiring low power operation. The charge pump strength allows the drivers to provide ±4.0V signals, plenty for typical EIA-562 applications since the EIA-562 receivers have input sensitivity levels of less than ±3V. THEORY OF OPERATION The SP385E-1 device is made up of three basic circuit blocks — 1) a driver/transmitter, 2) a receiver and 3) a charge pump. Driver/Transmitter The drivers are inverting level transmitters, that convert TTL or CMOS logic levels to ±5.0V EIA/TIA-232 levels inverted relative to the input logic levels. Typically the RS-232 output voltage swing is ±5.5V with no load and at least ±5V minimum fully loaded. The driver outputs are protected against infinite short-circuits to ground without degradation in reliability. Driver outputs will meet EIA/TIA-562 levels of ±3.7V with supply voltages as low as 2.7V. The instantaneous slew rate of the transmitter output is internally limited to a maximum of 30V/µs in order to meet the standards [EIA 232- D 2.1.7, Paragraph (5)]. However, the transition region slew rate of these enhanced products is typically 10V/µs. The smooth transition of the loaded output from V OL to VOH clearly meets the monotonicity requirements of the standard [EIA 232-D 2.1.7, Paragraphs (1) & (2)]. Receivers The receivers convert RS-232 input signals to inverted TTL signals. Since the input is usually from a transmission line, where long cable lengths and system interference can degrade the signal, the inputs have a typical hysteresis margin of 500mV. This ensures that the receiver is virtually immune to noisy transmission lines. The input thresholds are 0.8V minimum and 2.4V maximum, again well within the ±3V RS- 232 requirements. The receiver inputs are also protected against voltages up to ±15V. Should an input be left unconnected, a 5kΩ pull-down resistor to ground will commit the output of the receiver to a high state. In actual system applications, it is quite possible for signals to be applied to the receiver inputs before power is applied to the receiver circuitry. This occurs for example when a PC user attempts to print only to realize the printer wasn’t turned on. In this case an RS-232 signal from the PC will appear on the receiver input at the printer. When the printer power is turned on, the receiver will operate normally. All of these enhanced devices are fully protected.

before he or she even touches the system. varies with the approach speed. test receives a duration of voltage. Figure 8. ESD Test Waveform for IEC1000-4-2 Table 1. Transceiver ESD Tolerance Levels

Rev. 07/26/02 SP385E-1 True +3V to +5V RS-232 Line Driver/Receiver © Copyright 2001 Sipex Corporation D EH PACKAGE: PLASTIC SMALL OUTLINE (SOIC) (WIDE) DIMENSIONS (Inches) Minimum/Maximum (mm) A Ø LBe A B D E e H L Ø 18–PIN 0.090/0.104 (2.29/2.649)) 0.004/0.012 (0.102/0.300) 0.013/0.020 (0.330/0.508) 0.447/0.463 (11.35/11.74) 0.291/0.299 (7.402/7.600)

0.050 BSC

(1.270 BSC) 0.394/0.419 (10.00/10.64) 0.016/0.050 (0.406/1.270) 0°/8° (0°/8°)

Rev. 07/26/02 SP385E-1 True +3V to +5V RS-232 Line Driver/Receiver © Copyright 2002 Sipex Corporation D EH PACKAGE: PLASTIC SHRINK SMALL OUTLINE (SSOP) DIMENSIONS (Inches) Minimum/Maximum (mm) 20–PIN A Ø LBe A B D E e H L Ø 0.068/0.078 (1.73/1.99) 0.002/0.008 (0.05/0.21) 0.010/0.015 (0.25/0.38) 0.278/0.289 (7.07/7.33) 0.205/0.212 (5.20/5.38)

0.0256 BSC

(0.65 BSC) 0.301/0.311 (7.65/7.90) 0.022/0.037 (0.55/0.95) 0°/8° (0°/8°)

Rev. 07/26/02 SP385E-1 True +3V to +5V RS-232 Line Driver/Receiver © Copyright 2001 Sipex Corporation

ORDERING INFORMATION

Part Number Temperature Range Package CT and ET packages available Tape–on–Reel. Please consult the factory for pricing and availability for this option, and for parts screened to MIL–STD–883. Corporation SIGNAL PROCESSING EXCELLENCE Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. Sipex Corporation Headquarters and Sales Office

22 Linnell Circle

Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com Sales Office

233 South Hillview Drive

Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600