LT1181ACSW

LT1180A/LT1181A Low Power 5V RS232 Dual Driver/Receiver with 0.1µF Capacitors FEATURES s s s s s s s s s DESCRIPTIO s s s s 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 APPLICATIO S s s s s s Portable Computers Battery-Powered Systems Power Supply Generator Terminals Modems 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. 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 TYPICAL APPLICATIO 0.1µF + 2 4 LT1180A 17 3 5V INPUT + + 5 6 12 LOGIC INPUTS 11 13 LOGIC OUTPUTS 10 18 5k 5k 9 16 15 8 14 7 V + OUT 0.1µF V – OUT 0.1µF RS232 OUTPUT RS232 OUTPUT RS232 INPUT DRIVER OUTPUT RL = 3k CL = 2500pF ON/OFF + 0.1µF RECEIVER OUTPUT R CL = 50pF INPUT RS232 INPUT LT1180A • TA01 U Output Waveforms LT1180A • TA02 U U 11801afb 1 LT1180A/LT1181A ABSOLUTE AXI U RATI GS 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 PACKAGE/ORDER I FOR ATIO TOP VIEW NC C1+ V+ C1 – C2+ C2 – 1 2 3 4 5 6 7 8 9 18 ON/OFF 17 VCC 16 GND 15 TR1 OUT 14 REC1 IN 13 REC1 OUT 12 TR1 IN 11 TR2 IN 10 REC2 OUT ORDER PART NUMBER LT1180ACN LT1180ACSW LT1180AIN LT1180AISW V– TR2 OUT REC2 IN 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) LT1180AMJ OBSOLETE PACKAGE Consider N Package for Alternate Source Consult LTC Marketing for parts specified with wider operating temperature ranges. The q 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 V + Output V – Output Supply Current (VCC) Supply Current When OFF (VCC) Supply Rise Time Shutdown to Turn-On ON/OFF Pin Thresholds (Note 3), TA = 25°C q ELECTRICAL CHARACTERISTICS CONDITIONS Shutdown (Note 4) LT1180A Only C1 = C2 = C3 = C4 = 0.1µF LT1180A Only Input Low Level (Device Shutdown) Input High Level (Device Enabled) 2 U U W WW U W (Note 1) 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 TOP VIEW C1+ V+ C1 – C2+ C2 – V– TR2 OUT REC2 IN 1 2 3 4 5 6 7 8 16 VCC 15 GND 14 TR1 OUT 13 REC1 IN 12 REC1 OUT 11 TR1 IN 10 TR2 IN 9 REC2 OUT ORDER PART NUMBER LT1181ACN LT1181ACSW LT1181AIN LT1181AISW 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) J PACKAGE 16-LEAD CERDIP TJMAX = 150°C, θJA = 100°C/W, θJC = 40°C/W (J) LT1181AMJ OBSOLETE PACKAGE Consider N Package for Alternate Source MIN TYP 7.9 – 7.0 9 MAX UNITS V V 13 16 10 mA mA µA ms ms q 1 0.2 0.2 q q 0.8 1.2 1.6 2.4 V V 11801afb LT1180A/LT1181A ELECTRICAL CHARACTERISTICS PARAMETER ON/OFF Pin Current Oscillator Frequency Driver Output Voltage Swing Logic Input Voltage Level Input High Level (VOUT = Low) Logic Input Current Output Short-Circuit Current Output Leakage Current Date Rate (Note 7) Slew Rate RL = 3k, CL = 2500pF Propagation Delay Receiver Input Voltage Thresholds Load = 3k to GND CONDITIONS 0V ≤ VON/OFF ≤ 5V The q 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) MIN q TYP 130 MAX 80 UNITS µA kHz V V V V µA mA µA kBaud kBaud – 15 Positive Negative 5.0 q q q q 7.5 – 6.3 1.4 1.4 5 17 10 – 5.0 0.8 20 100 Input Low Level (VOUT = High) 0.8V ≤ VIN ≤ 2.0V VOUT = 0V Shutdown VOUT = ± 30V (Note 4) RL = 3k, CL = 2500pF RL = 3k, CL = 1000pF RL = 3k, CL = 51pF 2.0 ±9 q 120 250 4 15 7 0.6 0.5 q q q q q 30 1.3 1.3 V/µs V/µs µs µs V V V V V kΩ µA V V mA ns ns Output Transition tHL High-to-Low (Note 5) Output Transition tLH Low-to-High Input Low Threshold (VOUT = High) Input High Threshold (VOUT = Low) Input LowI, Input HighI, C Grade C Grade M Grade M Grade 0.8 0.2 0.1 3 q q q 1.3 1.7 1.3 1.7 0.4 5 1 0.2 4.2 –20 20 250 350 2.4 3.0 1.0 7 10 0.4 – 10 mA 600 600 Hysteresis Input Resistance Output Leakage Current Output Voltage Output Short-Circuit Current Propagation Delay VIN = ±10V Shutdown (Note 4) 0 ≤ VOUT ≤ VCC Output Low, IOUT = – 1.6mA Output High, IOUT = 160µA (VCC = 5V) Sinking Current, VOUT = VCC Sourcing Current, VOUT = 0V Output Transition tHL High-to-Low (Note 6) Output Transition tLH Low-to-High 3.5 10 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 TYPICAL PERFOR A CE CHARACTERISTICS Driver Maximum Output Voltage vs Load Capacitance 8.0 7.5 PEAK OUTPUT VOLTAGE (V) DRIVER OUTPUT VOLTAGE (V) PEAK OUTPUT VOLTAGE (V) 7.0 20kBAUD 6.5 60kBAUD 6.0 5.5 5.0 0 1 2 345678 LOAD CAPACITANCE (nF) 9 10 120kBAUD Receiver Input Thresholds 3.00 2.75 THRESHOLD VOLTAGE (V) 2.25 2.00 1.75 1.50 1.25 1.00 0.75 0.50 –55 –25 50 25 0 75 TEMPERATURE (°C) 100 125 INPUT LOW INPUT HIGH THRESHOLD VOLTAGE (V) 2.50 SUPPLY CURRENT (mA) Supply Current 25 100 SHORT-CIRCUIT CURRENT (mA) 20 SUPPLY CURRENT (mA) LEAKAGE CURRENT (µA) 2 DRIVERS LOADED RL = 3k 15 1 DRIVER LOADED RL = 3k 10 NO LOAD 5 0 –55 –25 50 25 0 75 TEMPERATURE (°C) 4 UW LT1180A • TPC01 Driver Minimum Output Voltage vs Load Capacitance –4.0 –4.5 120kBAUD –5.0 60kBAUD –5.5 –6.0 –6.5 –7.0 0 1 2 345678 LOAD CAPACITANCE (nF) 9 10 20kBAUD 10 8 6 4 2 0 –2 –4 –6 –8 Driver Output Voltage RL = 3k VCC = 5.5V VCC = 5V VCC = 4.5V OUTPUT HIGH OUTPUT LOW VCC = 4.5V VCC = 5V VCC = 5.5V –10 –55 –25 50 25 0 75 TEMPERATURE (°C) 100 125 LT1180A • TPC02 LT1180A • TPC03 Supply Current vs Data Rate 50 2 DRIVERS ACTIVE RL = 3k CL = 2500pF ON/OFF Thresholds 3.0 2.5 2.0 1.5 1.0 OFF THRESHOLD 0.5 0 –55 –25 40 30 ON THRESHOLD 20 10 0 0 25 50 75 100 DATA RATE (kBAUD) 125 150 50 25 75 0 TEMPERATURE (°C) 100 125 LT1180A • TPC04 LT1180A • TPC05 LT1180A • TPC06 Driver Leakage in Shutdown 30 25 Driver Short-Circuit Current ISC+ 20 15 ISC– 10 5 0 –55 –25 10 1 VOUT = 30V VOUT = – 30V 100 125 0.1 –55 –25 50 25 0 75 TEMPERATURE (°C) 100 125 50 25 75 0 TEMPERATURE (°C) 100 125 LT1180A • TPC07 LT1180A • TPC08 LT1180A • TPC09 11801afb LT1180A/LT1181A TYPICAL PERFOR A CE CHARACTERISTICS Receiver Short-Circuit Current 50 SHORT-CIRCUIT CURRENT (mA) 40 SLEW RATE (V/µs) 30 RX ISC+ 20 10 0 –55 –25 50 25 0 75 TEMPERATURE (°C) Shutdown to Driver Outputs 10V DRIVER 1 OUTPUT 5V GND GND DRIVER 2 OUTPUT – 5V – 10V DRIVER OUTPUT RL = 3k DRIVER OUTPUT RL = 3k CL = 2500pF ON/OFF PIN INPUT LT1180A • TPC12 LT1180A • TPC13 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. UW RX ISC– Slew Rate vs Load Capacitance 16 14 12 10 8 +SLEW 6 –SLEW 4 2 100 125 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 • TPC11 LT1180A • TPC10 Driver Output Waveforms U U U 11801afb 5 LT1180A/LT1181A 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 –. 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. 6 U U U U ESD Test Circuit 1 2 NC C1+ V+ C1– C2+ C2 – V– LT1180A ON/OFF 5V VCC GND 18 17 16 + 0.1µF 0.1µF + 3 4 + 0.1µF DR1 OUT 15 RX1 IN 14 RX1 OUT 13 DR1 IN 12 DR2 IN 11 RX2 OUT 10 LT1180A • ESD TC 0.1µF + 0.1µF RS232 LINE PINS PROTECTED TO ±10kV 5 6 RS232 LINE PINS PROTECTED TO ±10kV + 7 8 DR2 OUT 9 RX2 IN 11801afb LT1180A/LT1181A TYPICAL APPLICATI UO Supporting an LT1039 (Triple Driver/Receiver) 5V 18 ON/OFF LT1180A TTL INPUT 11 8 TTL INPUT RS232 OUTPUT TTL INPUT RS232 OUTPUT TTL INPUT RS232 INPUT TTL OUTPUT 11 16 30k 9 5k C1+ C1– C2 + C2 – GND 16 V+ V– 3 7 TTL OUTPUT 12 1 9 30k 7 RS232 INPUT RS232 INPUT TTL OUTPUT 14 30k 5 RS232 INPUT 8 3 RS232 OUTPUT RS232 INPUT 13 6 RS232 OUTPUT 15 VCC 17 18 VCC ON/OFF LT1039 17 4 RS232 OUTPUT 15 14 5k 10 V+ V– GND 10 LT1180A • TA04 SHUTDOWN TTL INPUT 12 TTL OUTPUT 13 TTL OUTPUT 1µF + 2 4 5 1µF + 6 + + 1µF 1µF 11801afb 7 LT1180A/LT1181A PACKAGE DESCRIPTIO U (Reference LTC DWG # 05-08-1110) CORNER LEADS OPTION (4 PLCS) 0.005 (0.127) MIN 0.840 (21.336) MAX 16 15 14 13 12 11 10 9 0.025 (0.635) RAD TYP 1 2 3 4 5 6 7 8 0.200 (5.080) MAX 0.015 – 0.060 (0.380 – 1.520) 0.220 – 0.310 (5.588 – 7.874) 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 J16 1298 J Package 16-Lead CERDIP (Narrow .300 Inch, Hermetic) 0.023 – 0.045 (0.584 – 1.143) HALF LEAD OPTION 0.045 – 0.068 (1.143 – 1.727) FULL LEAD OPTION 0.300 BSC (0.762 BSC) 0.008 – 0.018 (0.203 – 0.457) 0 ° – 1 5° NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE OR TIN PLATE LEADS 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 0.960 (24.384) MAX 18 17 16 15 14 13 12 11 10 0.023 – 0.045 (0.584 – 1.143) HALF LEAD OPTION 0.045 – 0.068 (1.143 – 1.727) FULL LEAD OPTION 0.025 (0.635) RAD TYP 1 2 3 4 5 6 7 8 9 0.220 – 0.310 (5.590 – 7.870) 0.300 BSC (0.762 BSC) 0.015 – 0.060 (0.380 – 1.520) 0.200 (5.080) MAX 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 PACKAGE DESCRIPTIO U N Package 16-Lead PDIP (Narrow .300 Inch) (Reference LTC DWG # 05-08-1510) 0.770* (19.558) MAX 12 11 10 9 16 15 14 13 0.255 ± 0.015* (6.477 ± 0.381) 1 2 3 4 5 6 7 8 0.130 ± 0.005 (3.302 ± 0.127) 0.020 (0.508) MIN 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 N16 1098 0.300 – 0.325 (7.620 – 8.255) 0.009 – 0.015 (0.229 – 0.381) ( +0.035 0.325 –0.015 8.255 +0.889 –0.381 ) *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm) 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 0.255 ± 0.015* (6.477 ± 0.381) 1 0.300 – 0.325 (7.620 – 8.255) 0.130 ± 0.005 (3.302 ± 0.127) 0.020 (0.508) MIN 2 3 4 5 6 7 8 9 0.045 – 0.065 (1.143 – 1.651) 0.009 – 0.015 (0.229 – 0.381) 0.065 (1.651) TYP 0.125 (3.175) MIN 0.018 ± 0.003 (0.457 ± 0.076) 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 ( +0.035 0.325 –0.015 ) 0.100 (2.54) BSC N18 1098 11801afb 9 LT1180A/LT1181A PACKAGE DESCRIPTIO U (Reference LTC DWG # 05-08-1620) 0.398 – 0.413* (10.109 – 10.490) 16 15 14 13 12 11 10 9 NOTE 1 0.394 – 0.419 (10.007 – 10.643) 1 2 3 4 5 6 7 8 0.093 – 0.104 (2.362 – 2.642) 0.037 – 0.045 (0.940 – 1.143) 0° – 8° TYP 0.050 (1.270) BSC 0.004 – 0.012 (0.102 – 0.305) 0.014 – 0.019 (0.356 – 0.482) TYP S16 (WIDE) 1098 SW Package 16-Lead Plastic Small Outline (Wide .300 Inch) 0.291 – 0.299** (7.391 – 7.595) 0.010 – 0.029 × 45° (0.254 – 0.737) 0.009 – 0.013 (0.229 – 0.330) NOTE 1 0.016 – 0.050 (0.406 – 1.270) 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 *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 PACKAGE DESCRIPTIO U 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 NOTE 1 0.394 – 0.419 (10.007 – 10.643) 1 0.093 – 0.104 (2.362 – 2.642) 2 3 4 5 6 7 8 9 0.037 – 0.045 (0.940 – 1.143) 0° – 8° TYP 0.050 (1.270) BSC 0.004 – 0.012 (0.102 – 0.305) 0.014 – 0.019 (0.356 – 0.482) TYP S18 (WIDE) 1098 0.291 – 0.299** (7.391 – 7.595) 0.010 – 0.029 × 45° (0.254 – 0.737) 0.009 – 0.013 (0.229 – 0.330) NOTE 1 0.016 – 0.050 (0.406 – 1.270) 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 *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 TYPICAL APPLICATI 12 LOGIC INPUTS 11 13 LOGIC OUTPUTS 10 5k ON/OFF 18 5k 15 8 14 9 16 LT1180A • TA03 RELATED PARTS PART NUMBER LT1280A/LT1281A LT1381 LT1780/LT1781 DESCRIPTION 5V 2-Driver/2-Receiver RS232 Transceivers 5V 2-Driver/2-Receiver RS232 Transceiver 5V 2-Driver/2-Receiver RS232 Transceivers COMMENTS Pin Compatible with LT1180A/LT1181A, ICC = 10mA Max Narrow 16-Pin SO Package IEC 1000-4-2 Level 4 Compliance 12 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 q FAX: (408) 434-0507 q www.linear.com + UO Operation Using 5V and 12V Power Supplies 12V INPUT 2 4 LT1180A 0.1µF 17 3 5V INPUT + 5 6 7 0.1µF –12VOUT RS232 OUTPUT RS232 OUTPUT RS232 INPUT RS232 INPUT 11801afb LT/CPI 11/01 REV B 1.5K • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 1994