LT1180A/LT1181A Low Power 5V RS232 Dual Driver/Receiver with 0.1µF Capacitors U DESCRIPTIO FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ESD Protection over ±10kV Uses Small Capacitors: 0.1µF 120kBaud Operation for RL = 3k, CL = 2500pF 250kBaud Operation for RL = 3k, CL = 1000pF Outputs Withstand ±30V Without Damage CMOS Comparable Low Power: 40mW Operates from a Single 5V Supply Rugged Bipolar Design Outputs Assume a High Impedance State When Off or Powered Down Meets All RS232 Specifications Available With or Without Shutdown Absolutely No Latch-up Available in SO Package U APPLICATIO S ■ ■ ■ ■ Portable Computers Battery-Powered Systems Power Supply Generator Terminals Modems The LT1181A is available in 16-pin DIP and SO packages. The LT1180A is supplied in 18-pin DIP and SO packages for applications which require shutdown. , LTC and LT are registered trademarks of Linear Technology Corporation. TransZorb is a registered trademark of General Instruments, GSI U ■ The LT®1180A/LT1181A are dual RS232 driver/receiver pairs with integral charge pump to generate RS232 voltage levels from a single 5V supply. These circuits feature rugged bipolar design to provide operating fault tolerance and ESD protection unmatched by competing CMOS designs. Using only 0.1µF external capacitors, these circuits consume only 40mW of power, and can operate to 120k baud even while driving heavy capacitive loads. New ESD structures on the chip allow the LT1180A/LT1181A to survive multiple ±10kV strikes, eliminating the need for costly TransZorbs® on the RS232 line pins. The LT1180A/ LT1181A are fully compliant with EIA RS232 standards. Driver outputs are protected from overload, and can be shorted to ground or up to ±30V without damage. During shutdown or power-off conditions, driver and receiver outputs are in a high impedance state, allowing line sharing. TYPICAL APPLICATIO + 0.1µF 2 17 4 3 V + OUT + 0.1µF LT1180A + 0.1µF LOGIC INPUTS 5 7 12 15 11 8 13 14 0.1µF RS232 OUTPUT RS232 OUTPUT RS232 INPUT DRIVER OUTPUT RL = 3k CL = 2500pF RECEIVER OUTPUT R CL = 50pF INPUT 5k LOGIC OUTPUTS 10 ON/OFF V – OUT + 6 Output Waveforms 5V INPUT 18 9 5k RS232 INPUT LT1180A • TA02 16 LT1180A • TA01 11801afb 1 LT1180A/LT1181A W W W AXI U U ABSOLUTE RATI GS (Note 1) Supply Voltage (VCC) ................................................ 6V V + ........................................................................ 13.2V V – ...................................................................... –13.2V Input Voltage Driver ........................................................... V – to V + Receiver ............................................... – 30V to 30V ON/OFF ................................................. – 0.3V to 12V Output Voltage Driver ...................................... V+ – 30V to V – + 30V Receiver .................................... – 0.3V to VCC + 0.3V Short-Circuit Duration V + ................................................................... 30 sec V – ................................................................... 30 sec Driver Output .............................................. Indefinite Receiver Output .......................................... Indefinite Operating Temperature Range LT1180AI/LT1181AI .......................... – 40°C to 85°C LT1180AC/LT1181AC ............................. 0°C to 70°C Storage Temperature Range ................ – 65°C to 150°C Lead Temperature (Soldering, 10 sec)................. 300°C U W U PACKAGE/ORDER I FOR ATIO TOP VIEW NC 1 18 ON/OFF C1+ 2 17 VCC V+ 3 16 GND C1 – 4 15 TR1 OUT C2+ 5 14 REC1 IN – 6 13 REC1 OUT 7 12 TR1 IN C2 V– TR2 OUT REC2 IN ORDER PART NUMBER 8 LT1180ACN LT1180ACSW LT1180AIN LT1180AISW 11 TR2 IN 9 10 REC2 OUT C1+ 1 16 VCC V+ 2 15 GND C1 – 3 14 TR1 OUT C2+ 4 13 REC1 IN C2 – 5 12 REC1 OUT V– 6 11 TR1 IN TR2 OUT 7 10 TR2 IN REC2 IN 8 9 LT1181ACN LT1181ACSW LT1181AIN LT1181AISW REC2 OUT SW PACKAGE N PACKAGE 16-LEAD PDIP 16-LEAD PLASTIC SO (WIDE) TJMAX = 125°C, θJA = 90°C/ W, θJC = 46°C/W (N) TJMAX = 125°C, θJA = 95°C/ W, θJC = 27°C/W (SW) N PACKAGE SW PACKAGE 18-LEAD PDIP 18-LEAD PLASTIC SO (WIDE) TJMAX = 125°C, θJA = 80°C/ W, θJC = 36°C/W (N) TJMAX = 125°C, θJA = 90°C/ W, θJC = 26°C/W (SW) J PACKAGE 18-LEAD CERDIP TJMAX = 150°C, θJA = 100°C/W, θJC = 40°C/W (J) ORDER PART NUMBER TOP VIEW LT1180AMJ J PACKAGE 16-LEAD CERDIP TJMAX = 150°C, θJA = 100°C/W, θJC = 40°C/W (J) LT1181AMJ OBSOLETE PACKAGE OBSOLETE PACKAGE Consider N Package for Alternate Source Consider N Package for Alternate Source Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the operating temperature range (0°C ≤ TA ≤ 70°C for commercial grade, and – 40°C ≤ TA ≤ 85°C for industrial grade. (Note 2) PARAMETER Power Supply Generator CONDITIONS MIN V + Output MAX 7.9 V – Output Supply Current (VCC) TYP V – 7.0 (Note 3), TA = 25°C Supply Current When OFF (VCC) Shutdown (Note 4) LT1180A Only Supply Rise Time Shutdown to Turn-On C1 = C2 = C3 = C4 = 0.1µF LT1180A Only ON/OFF Pin Thresholds Input Low Level (Device Shutdown) Input High Level (Device Enabled) ● V 9 13 16 1 10 ● 0.2 0.2 ● ● 0.8 1.2 1.6 UNITS mA mA µA ms ms 2.4 V V 11801afb 2 LT1180A/LT1181A ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the operating temperature range (0°C ≤ TA ≤ 70°C for commercial grade, and – 40°C ≤ TA ≤ 85°C for industrial grade. (Note 2) PARAMETER CONDITIONS ON/OFF Pin Current 0V ≤ VON/OFF ≤ 5V MIN ● TYP – 15 Oscillator Frequency MAX 80 130 UNITS µA kHz Driver Output Voltage Swing Load = 3k to GND Positive Negative Logic Input Voltage Level Input High Level (VOUT = Low) Input Low Level (VOUT = High) Logic Input Current 0.8V ≤ VIN ≤ 2.0V Output Short-Circuit Current VOUT = 0V Output Leakage Current Shutdown VOUT = ±30V (Note 4) Date Rate (Note 7) RL = 3k, CL = 2500pF RL = 3k, CL = 1000pF Slew Rate RL = 3k, CL = 2500pF RL = 3k, CL = 51pF Propagation Delay Output Transition tHL High-to-Low (Note 5) Output Transition tLH Low-to-High 5.0 ● ● ● 7.5 – 6.3 1.4 1.4 0.8 2.0 5 20 ±9 17 ● 10 ● V V µA mA 100 120 250 4 V V – 5.0 µA kBaud kBaud 15 7 30 V/µs V/µs 0.6 0.5 1.3 1.3 µs µs 1.3 1.7 2.4 V V 1.3 1.7 3.0 V V Receiver Input Voltage Thresholds Input Low Threshold (VOUT = High) Input High Threshold (VOUT = Low) C Grade C Grade ● ● 0.8 Input LowI, Input HighI, M Grade M Grade ● ● 0.2 ● 0.1 0.4 1.0 3 5 7 kΩ Hysteresis Input Resistance VIN = ±10V V Output Leakage Current Shutdown (Note 4) 0 ≤ VOUT ≤ VCC ● 1 10 µA Output Voltage Output Low, IOUT = – 1.6mA Output High, IOUT = 160µA (VCC = 5V) ● ● 0.4 3.5 0.2 4.2 V V –20 20 – 10 mA mA 10 250 350 600 600 ns ns Output Short-Circuit Current Propagation Delay Sinking Current, VOUT = VCC Sourcing Current, VOUT = 0V Output Transition tHL High-to-Low (Note 6) Output Transition tLH Low-to-High Note 1: Absolute Maximum Ratings are those values beyond which the life of the device may be impaired. Note 2: Testing done at VCC = 5V and VON/OFF = 3V, unless otherwise specified. Note 3: Supply current is measured as the average over several charge pump cycles. C + = C – = C1 = C2 = 0.1µF. All outputs are open, with all driver inputs tied high. Note 4: Supply current measurements in SHUTDOWN are performed with VON/OFF ≤ 0.1V. Note 5: For driver delay measurements, RL = 3k and CL = 51pF. Trigger points are set between the driver’s input logic threshold and the output transition to the zero crossing (t HL = 1.4V to 0V and tLH = 1.4V to 0V). Note 6: For receiver delay measurements, CL = 51pF. Trigger points are set between the receiver’s input logic threshold and the output transition to standard TTL/CMOS logic threshold (t HL = 1.3V to 2.4V and tLH = 1.7V to 0.8V). Note 7: Data rate operation guaranteed by slew rate, short-circuit current and propagation delay tests. 11801afb 3 LT1180A/LT1181A U W TYPICAL PERFOR A CE CHARACTERISTICS Driver Maximum Output Voltage vs Load Capacitance Driver Minimum Output Voltage vs Load Capacitance 8.0 Driver Output Voltage 10 –4.0 8 7.0 20kBAUD 6.5 60kBAUD 6.0 120kBAUD 5.5 DRIVER OUTPUT VOLTAGE (V) –4.5 PEAK OUTPUT VOLTAGE (V) PEAK OUTPUT VOLTAGE (V) 7.5 120kBAUD –5.0 60kBAUD –5.5 20kBAUD –6.0 –6.5 RL = 3k 6 VCC = 5.5V VCC = 5V VCC = 4.5V OUTPUT HIGH 4 2 0 OUTPUT LOW VCC = 4.5V VCC = 5V VCC = 5.5V –2 –4 –6 –8 5.0 0 1 2 3 4 5 6 7 8 LOAD CAPACITANCE (nF) 9 10 0 1 2 3 4 5 6 7 8 LOAD CAPACITANCE (nF) LT1180A • TPC01 9 10 Receiver Input Thresholds Supply Current vs Data Rate ON/OFF Thresholds 2 DRIVERS ACTIVE RL = 3k CL = 2500pF INPUT HIGH 1.75 INPUT LOW 1.50 1.25 1.00 2.5 THRESHOLD VOLTAGE (V) SUPPLY CURRENT (mA) 40 2.25 125 3.0 2.75 2.50 100 LT1180A • TPC03 50 2.00 50 25 0 75 TEMPERATURE (°C) LT1180A • TPC02 3.00 THRESHOLD VOLTAGE (V) –10 –55 –25 –7.0 30 20 10 2.0 ON THRESHOLD 1.5 1.0 OFF THRESHOLD 0.5 0.75 50 25 0 75 TEMPERATURE (°C) 100 0 125 0 25 50 75 100 DATA RATE (kBAUD) 125 LT1180A • TPC04 LEAKAGE CURRENT (µA) SUPPLY CURRENT (mA) 10 1 DRIVER LOADED RL = 3k NO LOAD 5 0 –55 –25 Driver Short-Circuit Current 50 25 0 75 TEMPERATURE (°C) 100 125 LT1180A • TPC07 10 1 0.1 –55 –25 125 30 100 15 100 LT1180A • TPC06 Driver Leakage in Shutdown Supply Current 2 DRIVERS LOADED RL = 3k 50 25 75 0 TEMPERATURE (°C) LT1180A • TPC05 25 20 0 –55 –25 150 SHORT-CIRCUIT CURRENT (mA) 0.50 –55 –25 VOUT = 30V VOUT = –30V 50 25 0 75 TEMPERATURE (°C) 100 125 LT1180A • TPC08 25 ISC+ 20 15 ISC– 10 5 0 –55 –25 50 25 75 0 TEMPERATURE (°C) 100 125 LT1180A • TPC09 11801afb 4 LT1180A/LT1181A U W TYPICAL PERFOR A CE CHARACTERISTICS Receiver Short-Circuit Current Slew Rate vs Load Capacitance 16 14 40 12 RX ISC– 30 SLEW RATE (V/µs) SHORT-CIRCUIT CURRENT (mA) 50 RX ISC+ 20 10 8 +SLEW 6 –SLEW 4 10 2 0 –55 –25 50 25 0 75 TEMPERATURE (°C) 100 125 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 LOAD CAPACITANCE (nF) LT1180A • TPC10 LT1180A • TPC11 Shutdown to Driver Outputs Driver Output Waveforms 10V DRIVER 1 OUTPUT 5V DRIVER OUTPUT RL = 3k CL = 2500pF GND GND DRIVER 2 OUTPUT – 5V DRIVER OUTPUT RL = 3k – 10V ON/OFF PIN INPUT LT1180A • TPC12 LT1180A • TPC13 U U U PI FU CTIO S VCC: 5V Input Supply Pin. This pin should be decoupled with a 0.1µF ceramic capacitor close to the package pin. Insufficient supply bypassing can result in low output drive levels and erratic charge pump operation. GND: Ground Pin. ON/OFF: A TTL/CMOS Compatible Operating Mode Control. A logic low puts the LT1180A in shutdown mode. Supply current drops to zero and both driver and receiver outputs assume a high impedance state. A logic high fully enables the device. V +: Positive Supply Output (RS232 Drivers). V + ≈ 2VCC – 1.5V. This pin requires an external charge storage capacitor C ≥ 0.1µF, tied to ground or VCC. Larger value capacitors may be used to reduce supply ripple. With multiple transceivers, the V+ and V – pins may be paralleled into common capacitors. V –: Negative Supply Output (RS232 Drivers). V – ≈ –(2VCC – 2.5V). This pin requires an external charge storage capacitor C ≥ 0.1µF. Larger value capacitors may be used to reduce supply ripple. With multiple transceivers, the V+ and V – pins may be paralleled into common capacitors. 11801afb 5 LT1180A/LT1181A U U U PI FU CTIO S TR1 IN, TR2 IN: RS232 Driver Input Pins. These inputs are TTL/CMOS compatible. Inputs should not be allowed to float. Tie unused inputs to VCC. TR1 OUT, TR2 OUT: Driver Outputs at RS232 Voltage Levels. Driver output swing meets RS232 levels for loads up to 3k. Slew rates are controlled for lightly loaded lines. Output current capability is sufficient for load conditions up to 2500pF. Outputs are in a high impedance state when in shutdown mode, VCC = 0V, or when the driver disable pin is active. Outputs are fully short-circuit protected from V – + 30V to V + – 30V. Applying higher voltages will not damage the device if the overdrive is moderately current limited. Short circuits on one output can load the power supply generator and may disrupt the signal levels of the other outputs. The driver outputs are protected against ESD to ±10kV for human body model discharges. REC1 IN, REC2 IN: Receiver Inputs. These pins accept RS232 level signals (±30V) into a protected 5k terminating resistor. The receiver inputs are protected against ESD to ±10kV for human body model discharges. Each receiver provides 0.4V of hysteresis for noise immunity. Open receiver inputs assume a logic low state. REC1 OUT, REC2 OUT: Receiver outputs with TTL/CMOS Voltage Levels. Outputs are in a high impedance state when in shutdown mode to allow data line sharing. Outputs are fully short-circuit protected to ground or VCC with the power on, off or in the shutdown mode. C1 +, C1 –, C2 +, C2 –: Commutating Capacitor Inputs. These pins require two external capacitors C ≥ 0.1µF: one from C1+ to C1– and another from C2+ to C2 –. C1 should be deleted if a separate 12V supply is available and connected to pin C1+. Similarly, C2 should be deleted if a separate – 12V supply is connected to pin V –. U ESD PROTECTIO The RS232 line inputs of the LT1180A/LT1181A have onchip protection from ESD transients up to ±10kV. The protection structures act to divert the static discharge safely to system ground. In order for the ESD protection to function effectively, the power supply and ground pins of the circuit must be connected to ground through low impedances. The power supply decoupling capacitors and charge pump storage capacitors provide this low impedance in normal application of the circuit. The only constraint is that low ESR capacitors must be used for bypassing and charge storage. ESD testing must be done with pins VCC, VL, V +, V –, and GND shorted to ground or connected with low ESR capacitors. ESD Test Circuit 1 + 0.1µF 0.1µF + + 0.1µF 0.1µF RS232 LINE PINS PROTECTED TO ±10kV + NC ON/OFF LT1180A 18 17 2 C1+ 3 V+ 4 C1– 5 C2+ RX1 IN 14 6 C2 – RX1 OUT 13 7 V– 8 DR2 OUT 9 RX2 IN 5V VCC GND 16 + 0.1µF DR1 OUT 15 RS232 LINE PINS PROTECTED TO ±10kV DR1 IN 12 DR2 IN 11 RX2 OUT 10 LT1180A • ESD TC 11801afb 6 LT1180A/LT1181A UO TYPICAL APPLICATI Supporting an LT1039 (Triple Driver/Receiver) SHUTDOWN 5V 18 VCC ON/OFF 18 17 VCC LT1180A TTL INPUT TTL INPUT TTL OUTPUT 11 8 12 15 13 14 TTL INPUT ON/OFF LT1039 15 4 13 6 11 8 16 3 TTL INPUT + TTL INPUT RS232 INPUT TTL OUTPUT 1µF C1+ 4 C1– 5 + 1µF 6 RS232 INPUT TTL OUTPUT 14 5 5k 2 V+ V– C2 – GND 16 RS232 OUTPUT RS232 INPUT RS232 INPUT 30k TTL OUTPUT C2 + RS232 OUTPUT RS232 OUTPUT 30k 9 10 RS232 OUTPUT RS232 OUTPUT 5k TTL OUTPUT 17 12 7 3 1 V+ 7 9 V– + 1µF + 1µF RS232 INPUT 30k GND 10 LT1180A • TA04 11801afb 7 LT1180A/LT1181A U PACKAGE DESCRIPTIO J Package 16-Lead CERDIP (Narrow .300 Inch, Hermetic) (Reference LTC DWG # 05-08-1110) CORNER LEADS OPTION (4 PLCS) 0.840 (21.336) MAX 0.005 (0.127) MIN 0.023 – 0.045 (0.584 – 1.143) HALF LEAD OPTION 16 15 14 13 12 11 10 9 0.220 – 0.310 (5.588 – 7.874) 0.025 (0.635) RAD TYP 0.045 – 0.068 (1.143 – 1.727) FULL LEAD OPTION 2 1 3 5 4 6 7 8 0.200 (5.080) MAX 0.300 BSC (0.762 BSC) 0.015 – 0.060 (0.380 – 1.520) 0.008 – 0.018 (0.203 – 0.457) 0° – 15° NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS 0.045 – 0.065 (1.143 – 1.651) 0.125 (3.175) MIN 0.100 (2.54) BSC 0.014 – 0.026 (0.360 – 0.660) J16 1298 J Package 18-Lead CERDIP (Narrow .300 Inch, Hermetic) (Reference LTC DWG # 05-08-1110) CORNER LEADS OPTION (4 PLCS) 0.005 (0.127) MIN 0.023 – 0.045 (0.584 – 1.143) HALF LEAD OPTION 0.960 (24.384) MAX 18 17 16 15 14 13 12 11 10 0.220 – 0.310 (5.590 – 7.870) 0.025 (0.635) RAD TYP 0.045 – 0.068 (1.143 – 1.727) FULL LEAD OPTION 1 2 3 4 5 6 7 8 9 0.200 (5.080) MAX 0.300 BSC (0.762 BSC) 0.015 – 0.060 (0.380 – 1.520) 0.008 – 0.018 (0.203 – 0.457) 0° – 15° NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS 0.125 (3.175) MIN 0.045 – 0.065 (1.143 – 1.651) 0.014 – 0.026 (0.360 – 0.660) 0.100 (2.54) BSC J18 1298 OBSOLETE PACKAGES 11801afb 8 LT1180A/LT1181A U PACKAGE DESCRIPTIO N Package 16-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510) 0.770* (19.558) MAX 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 0.255 ± 0.015* (6.477 ± 0.381) 0.130 ± 0.005 (3.302 ± 0.127) 0.300 – 0.325 (7.620 – 8.255) 0.020 (0.508) MIN 0.009 – 0.015 (0.229 – 0.381) ( +0.035 0.325 –0.015 8.255 +0.889 –0.381 0.045 – 0.065 (1.143 – 1.651) ) 0.065 (1.651) TYP 0.125 (3.175) MIN 0.018 ± 0.003 (0.457 ± 0.076) 0.100 (2.54) BSC *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm) N16 1098 N Package 18-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510) 0.900* (22.860) MAX 18 17 16 15 14 13 12 11 10 1 2 3 4 5 6 7 8 9 0.255 ± 0.015* (6.477 ± 0.381) 0.130 ± 0.005 (3.302 ± 0.127) 0.300 – 0.325 (7.620 – 8.255) 0.009 – 0.015 (0.229 – 0.381) ( +0.035 0.325 –0.015 ) 0.020 (0.508) MIN 0.065 (1.651) TYP 0.125 (3.175) MIN 0.005 (0.127) MIN *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm) 8.255 +0.889 –0.381 0.045 – 0.065 (1.143 – 1.651) 0.100 (2.54) BSC 0.018 ± 0.003 (0.457 ± 0.076) N18 1098 11801afb 9 LT1180A/LT1181A U PACKAGE DESCRIPTIO SW Package 16-Lead Plastic Small Outline (Wide .300 Inch) (Reference LTC DWG # 05-08-1620) 0.398 – 0.413* (10.109 – 10.490) 16 15 14 13 12 11 10 9 0.394 – 0.419 (10.007 – 10.643) NOTE 1 1 0.291 – 0.299** (7.391 – 7.595) 2 3 4 5 6 7 0.093 – 0.104 (2.362 – 2.642) 0.010 – 0.029 × 45° (0.254 – 0.737) 8 0.037 – 0.045 (0.940 – 1.143) 0° – 8° TYP 0.009 – 0.013 (0.229 – 0.330) NOTE 1 0.016 – 0.050 (0.406 – 1.270) 0.050 (1.270) BSC 0.004 – 0.012 (0.102 – 0.305) 0.014 – 0.019 (0.356 – 0.482) TYP NOTE: 1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS. THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS S16 (WIDE) 1098 *DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE 11801afb 10 LT1180A/LT1181A U PACKAGE DESCRIPTIO SW Package 18-Lead Plastic Small Outline (Wide .300 Inch) (Reference LTC DWG # 05-08-1620) 0.447 – 0.463* (11.354 – 11.760) 18 17 16 15 14 13 12 11 10 0.394 – 0.419 (10.007 – 10.643) NOTE 1 0.291 – 0.299** (7.391 – 7.595) 1 2 3 4 5 6 7 8 9 0.093 – 0.104 (2.362 – 2.642) 0.010 – 0.029 × 45° (0.254 – 0.737) 0.037 – 0.045 (0.940 – 1.143) 0° – 8° TYP 0.009 – 0.013 (0.229 – 0.330) NOTE 1 0.016 – 0.050 (0.406 – 1.270) 0.050 (1.270) BSC 0.004 – 0.012 (0.102 – 0.305) 0.014 – 0.019 (0.356 – 0.482) TYP NOTE: 1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS. THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS S18 (WIDE) 1098 *DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE 11801afb Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 11 LT1180A/LT1181A UO TYPICAL APPLICATI Operation Using 5V and 12V Power Supplies 12V INPUT 2 17 4 3 5V INPUT LT1180A + 0.1µF LOGIC INPUTS 5 7 –12VOUT + 6 12 15 11 8 13 14 0.1µF RS232 OUTPUT RS232 OUTPUT RS232 INPUT 5k LOGIC OUTPUTS 10 9 RS232 INPUT 5k ON/OFF 18 16 LT1180A • TA03 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1280A/LT1281A 5V 2-Driver/2-Receiver RS232 Transceivers Pin Compatible with LT1180A/LT1181A, ICC = 10mA Max LT1381 5V 2-Driver/2-Receiver RS232 Transceiver Narrow 16-Pin SO Package LT1780/LT1781 5V 2-Driver/2-Receiver RS232 Transceivers IEC 1000-4-2 Level 4 Compliance 11801afb 12 Linear Technology Corporation LT/CPI 11/01 REV B 1.5K • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 1994