LT1039 TRIPLE EIA-232 LINE TRANSCEIVER SLLS105B – D3627, FEBRUARY 1991 – REVISED JANUARY 1992 • • • • • • • • • Meets All EIA-232-D (Revision of RS-232-C) Specifications DW OR N PACKAGE (TOP VIEW) Three Independent Drivers and Receivers Per Package VDD+ BIAS R1IN D1OUT R2IN D2OUT R3IN D3OUT VDD – EIA-232 Inputs and Outputs Withstand ±30 V 3-State Outputs All Outputs Are Short-Circuit Protected Virtually Zero Supply Current When Shutdown 1 18 2 17 3 16 4 15 5 14 6 13 7 12 8 11 9 10 VCC ON/OFF R1OUT D1IN R2OUT D2IN R3OUT D3IN GND Output of Several Devices Can Be Paralleled Operates From ±5-V to ±15-V Supplies Designed to Be Interchangeable With Linear Technology LT1039 description The LT1039 is a triple EIA-232 line transceiver designed to meet the requirements of Standard EIA-232-D. All outputs are fully protected against an overload or short to ground. A major advantage of the LT1039 is high-impedance output states when the device is off or powered down. This feature allows several different devices to be connected together on the same bus. The bias pin provides a receiver to be kept alive when the LT1039 is shutdown (ON/OFF = low). The LT1039 is characterized for operation from 0°C to 70°C. AVAILABLE OPTIONS PACKAGE TA SMALL OUTLINE (DW) 0°C to 70°C LT1039CDW PLASTIC DIP (N) LT1039CN The DW package is available taped and reeled. Add the suffix R to the device type (i.e., LT1039CDWR). Copyright 1992, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 2–1 LT1039 TRIPLE EIA-232 LINE TRANSCEIVER SLLS105B – D3627, FEBRUARY 1991 – REVISED JANUARY 1992 logic symbol† ON/OFF BIAS R1IN 17 EN 2 16 3 5 14 R3IN 7 4 D1OUT D2OUT 6 12 D3OUT 8 11 R2IN 15 13 R1OUT R2OUT R3OUT D1IN D2IN D3IN † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. logic diagram ON/OFF BIAS R1IN R2IN R3IN D1OUT D2OUT D3OUT 2–2 17 2 3 16 5 14 7 12 4 15 6 13 8 11 POST OFFICE BOX 655303 R1OUT R2OUT R3OUT D1IN D2IN D3IN • DALLAS, TEXAS 75265 LT1039 TRIPLE EIA-232 LINE TRANSCEIVER SLLS105B – D3627, FEBRUARY 1991 – REVISED JANUARY 1992 Terminal Functions PIN DESCRIPTION NAME NO. BIAS 2 D1IN, D2IN, D3IN 15, 13, 11 Line driver inputs. Operate properly on TTL or CMOS levels. Output valid from VI = (VDD –) + (2 to 15 V). Connect to 5 V when not used. D1OUT, D2OUT, D3OUT 4, 6, 8 Line driver outputs Keeps receiver 1 alive while the LT1039 is in the shutdown mode. Leave BIAS open when not in use. GND 10 Ground ON/OFF 17 Shuts down entire circuit. Cannot be left open. If VIL is at or near 0.8 V, significant settling time may be required. R1IN, R2IN, R3IN 3, 5, 7 Receiver inputs. Input impedance is normally 30 kΩ. Accepts EIA-232 voltage levels and has 0.4 V of hysteresis to provide noise immunity. R1OUT, R2OUT, R3OUT 16, 14, 12 Receiver outputs with TTL/CMOS voltage levels VDD + VDD – 1 Positive supply voltage for driver 9 Negative supply voltage for driver VCC 18 5-V supply voltage for receivers absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Supply voltage range, VDD + (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to 15 V Supply voltage range, VDD – . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to – 15 V Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input voltage range, driver input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VDD – to 25 V receiver input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 30 V Input voltage range, ON/OFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to 12 V Output voltage range, driver output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VDD+ – 30 V to VDD – + 30 V Duration of output short circuit at (or below) TA = 25°C (to ± 30 V, see Note 2) . . . . . . . . . . . . . . . . . unlimited Continuous total dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Dissipation Rating Table Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C NOTES: 1. All voltage values, except differential voltages, are with respect to the GND terminal. 2. The output may be shorted to either supply. Temperature and/or supply voltages must be limited to ensure that the maximum dissipation rating is not exceeded. DISSIPATION RATING TABLE PACKAGE TA ≤ 25°C POWER RATING DERATING FACTOR ABOVE TA = 25°C TA = 70°C POWER RATING DW 1025 mW 8.2 mW/°C 656 mW N 1150 mW 9.2 mW/°C 736 mW POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 2–3 LT1039 TRIPLE EIA-232 LINE TRANSCEIVER SLLS105B – D3627, FEBRUARY 1991 – REVISED JANUARY 1992 recommended operating conditions Supply voltage, VDD + Supply voltage, VDD – Supply voltage, VCC High-level input voltage, VIH (see Note 3) MIN NOM MAX 5 12 15 V –5 – 12 – 15 V 4.75 5 5.25 V 2 Low-level input voltage, VIL (see Note 3) Operating free-air temperature, TA UNIT V 0.8 V 70 °C 0 NOTE 3: VIH and VIL specifications apply only for inputs D1IN to D3IN. DRIVER SECTION electrical characteristics over recommended operating free-air temperature range, VDD± = ±11.4 V to ±12.6 V, ON/OFF at 2.5 V (unless otherwise noted) PARAMETER VOM + VOM – IIH IIL Maximum positive peak output voltage swing Maximum negative peak output voltage swing High-level input current Low-level input current TEST CONDITIONS MIN VDD+ – 0.4 TYP† V VDD – + 1.0 VI ≥ 2 V VI ≤ 0.8 V 1 20 µA 5 20 µA 80 Sinking current, Supply current VO = ±18 V, IO = 0 VI = 0, VO = 0 VO = 0 POST OFFICE BOX 655303 5 15 –5 – 15 ON/OFF at 0.4 V ICC(off) Off-state supply current ON/OFF at 0.4 V SR Slew rate RL = 3 kΩ, CL = 51 pF † All typical values are at VDD ± = ±12 V, TA = 25°C. 2–4 VDD – + 1.5 15 Sourcing current, Off-state output current UNIT VDD + – 0.4 Load = 3 kΩ to GND VI = 0 VI = 5 V IOZ ICC MAX • DALLAS, TEXAS 75265 4 ± 10 ± 200 µA 4 8 mA 1 100 µA 15 30 V/µs LT1039 TRIPLE EIA-232 LINE TRANSCEIVER SLLS105B – D3627, FEBRUARY 1991 – REVISED JANUARY 1992 RECEIVER SECTION electrical characteristics over recommended ranges of supply voltage and operating free-air temperature, ON/OFF at 2.5 V (unless otherwise noted) PARAMETER VT – VT + Negative-going input threshold voltage Vhys VOL Hysteresis (VT + – VT –) VOH High-level output voltage TEST CONDITIONS MIN TYP† 0.5 1.3 Positive-going input threshold voltage Low-level output voltage IOS Short circuit output current Short-circuit IOZ Off-state (high-impedance state) output current 0.1 IO = – 1.6 mA IO = 160 µA Sinking current, 3.5 Sourcing current, VO = VCC VO = 0 VO = 0 to VCC, VI = 0, 0.5 ON/OFF at 0.4 V • DALLAS, TEXAS 75265 UNIT V 1.7 2.8 V 0.4 1 V 0.4 0.5 V 4.8 V – 10 ICC Supply current IO = 0 ICC(off) Off-state supply current ON/OFF at 0.4 V † All typical values ground are at VCC = 5 V, TA = 25°C. POST OFFICE BOX 655303 MAX mA 1 ±1 ± 10 µA 4 7 mA 1 100 µA 2–5 LT1039 TRIPLE EIA-232 LINE TRANSCEIVER SLLS105B – D3627, FEBRUARY 1991 – REVISED JANUARY 1992 2–6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 IMPORTANT NOTICE Texas Instruments (TI) reserves the right to make changes to its products or to discontinue any semiconductor product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current and complete. TI warrants performance of its semiconductor products and related software to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. 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