LT1332CN

LT1332 Wide Supply Range Low Power RS232 Transceiver with 12V VPP Output for Flash Memory FEATURES s s s s s s s s DESCRIPTIO s s s s s Generates Full RS232 Signal Levels from 3V Supply 12V VPP Output Available for Flash Memory Useful with a Wide Variety of Switching Regulators Low Supply Current: I(VCC) = 1mA Wide Supply Range: 2V ≤ VCC ≤ 6V ESD Protection Over ±10kV Operates to 120k Baud Outputs Assume a High Impedance State When Off or Powered Down One µPower Receiver Remains Active While in SHUTDOWN Flowthrough Architecture Eases PC Board Layout 40µA Supply Current in SHUTDOWN Absolutely No Latch-Up Available in SO and SSOP Packages The LT1332 is a 3-driver/5-receiver RS232 transceiver, designed to be used in conjunction with a switching regulator. The LT1332 shares the regulator’s positive output, while charge is capacitively pumped from the regulator’s switch pin to the negative supply. Schottky rectifiers built into the LT1332 simplify the charge pump design. The LT1332/LT1109A combination shown below generates fully compliant RS232 signal levels from as little as 2V of input supply. The switcher can deliver greater than 100mA of output current, making the LT1332 an excellent choice for mouse driver circuits. Advanced driver output stages operate up to 120k baud while driving heavy capacitive loads. New ESD structures on chip make the LT1332 resilient to multiple ±10kV strikes, eliminating costly transient suppressors. A shutdown pin disables the transceiver except for one receiver which remains active for detecting incoming RS232 signals. When shut down, the disabled drivers and receivers assume high impedance output states. APPLICATI s s S Notebook and Palmtop Computers Mouse Driver Circuits TYPICAL APPLICATI STANDARD FLASH MEMORY VPP GENERATOR SWITCHER VIN 2 AA BATTERIES UP TO 6V L1** 33µH 22µF* LT1332 Powered from an LT1109A Micropower Switching Regulator Configured for Flash Memory 12V VPP OUTPUT + MBRS130T3 1µF V+ 1 24 23 22 21 20 19 18 17 16 15 14 LT1332 13 RS232 ON/OFF LOGIC SIDE V– 10µF C– 2 3 4 5 DRIVER INPUT DRIVER OUTPUT RL = 3k CL = 2500pF V IN SW ON/OFF LT1109A-12 SW SENSE ON/OFF GND PGND RS232 SIDE 6 7 8 * AVX TAJE226K035 ** SUMIDA CD54-330N (708-956-0666) 9 10 NC 0.1µF LT1332 • TA01 11 12 3V RS232 VCC + 22µF* RECEIVER OUTPUT CL = 50pF LT1332 • TA02 U Output Waveforms UO UO 1 LT1332 ABSOLUTE (Note 1) AXI U RATI GS Short Circuit Duration V + ................................................................... 30 sec V – ................................................................... 30 sec Driver Output .............................................. Indefinite Receiver Output .......................................... Indefinite Operating Temperature Range .................... 0°C to 70°C Storage Temperature Range ................ – 65°C to 150°C Lead Temperature (Soldering, 10 sec)................. 300°C Supply Voltage (VCC) ................................................ 6V V + ........................................................................ 13.2V V – ...................................................................... – 13.2V C – ......................................................................... – 15V Input Voltage Driver .......................................................... V + to V – Receiver ................................................ 30V to – 30V Output Voltage Driver .................................................... 30V to – 30V Receiver .................................... – 0.3V to VCC + 0.3V PACKAGE/ORDER I FOR ATIO TOP VIEW NC 1 NC 2 V+ 3 C– 4 DRIVER OUT 5 RX IN 6 DRIVER OUT 7 RX IN 8 RX IN 9 RX IN 10 DRIVER OUT 11 RXA IN 12 NC 13 3V VCC 14 G PACKAGE 28-LEAD SSOP 28 NC 27 NC 26 V – 25 GND 24 DRIVER IN 23 RX OUT 22 DRIVER IN 21 RX OUT 20 RX OUT 19 RX OUT 18 DRIVER IN 17 RXA OUT 16 RS232 ON/OFF 15 GND NC 1 V+ 2 C– 3 DRIVER OUT 4 RX IN 5 DRIVER OUT 6 RX IN 7 RX IN 8 RX IN 9 DRIVER OUT 10 RXA IN 11 NC 12 3V VCC 13 NC 14 N PACKAGE 28-LEAD PLASTIC DIP TJMAX = 150°C, θJA = 96°C/W TJMAX = 150°C, θJA = 56°C/W ORDER PART NUMBER LT1332CG Consult factory for Industrial and Military grade parts. ORDER PART NUMBER LT1332CN ELECTRICAL CHARACTERISTICS PARAMETER Power Supply Supply Current I(V +) Supply Current I(V –) Supply Current I(VCC) Supply Current When OFF I(VCC) Supply Current When OFF I(V +) Supply Current When OFF I(V –) CONDITIONS (Note 3) (Note 3) (Note 3) (Note 4) (Note 2) MIN TYP 0.3 – 0.6 1.0 0.04 0.04 0.10 0.10 MAX 0.8 –1.0 1.5 0.10 0.07 0.20 0.20 UNITS mA mA mA mA mA mA mA VCC = 3V, V + = 8V, VON/OFF = 0.1V VCC = 3V, V – = – 8V, VON/OFF = 0.1V 2 U U W WW U W TOP VIEW 28 NC 27 V – 26 GND 25 DRIVER IN 24 RX OUT 23 DRIVER IN 22 RX OUT 21 RX OUT 20 RX OUT 19 DRIVER IN 18 RXA OUT 17 RS232 ON/OFF 16 GND 15 NC V+ C– DRIVER OUT RX IN DRIVER OUT RX IN RX IN RX IN DRIVER OUT 1 2 3 4 5 6 7 8 9 TOP VIEW 24 V – 23 GND 22 DRIVER IN 21 RX OUT 20 DRIVER IN 19 RX OUT 18 RX OUT 17 RX OUT 16 DRIVER IN 15 RXA OUT 14 RS232 ON/OFF 13 GND RXA IN 10 NC 11 3V VCC 12 S PACKAGE 24-LEAD PLASTIC SOL TJMAX = 150°C, θJA = 80°C/W ORDER PART NUMBER LT1332CS q LT1332 ELECTRICAL CHARACTERISTICS PARAMETER Power Supply ON/OFF Pin Thresholds ON/OFF Pin Current Drivers Output Voltage Swing Logic Input Voltage Level Logic Input Current Output Short-Circuit Current Output Leakage Current Driver Output ESD Rating Slew Rate Propagation Delay Receivers Input Voltage Thresholds Hysteresis Input Resistance Receiver Input ESD Rating Output Voltage Output Leakage Current Output Short-Circuit Current Propagation Delay (Note 2) MIN q q q q q q q q q CONDITIONS Input Low Level (Device Shut Down) Input High Level (Device Enabled) 0V ≤ VON/OFF ≤ 5V Positive Negative Input Low Level (VOUT = High) Input High Level (VOUT = Low) 0.8V ≤ VIN ≤ 2.0V VOUT = 0V SHUTDOWN VOUT = ± 30V, VON/OFF = 0.1V Human Body Model Discharge RL = 3k, CL = 51pF RL = 3k, CL = 2500pF Output Transition t PHL High to Low (Note 5) Output Transition t PLH Low to High Input Low Threshold (VOUT = High) Input High Threshold (VOUT = Low) q TYP 0.7 0.6 MAX 0.3 80 UNITS V V µA V V V V µA mA µA kV V/µs V/µs µs µs V V V kΩ kV V V µA mA mA µs µs 1.3 –15 5.0 RL = 3k to GND 2.0 4 6.6 – 7.0 1.4 1.4 5 ± 17 10 ± 10 15 6 0.6 0.5 1.3 1.7 0.4 5 ± 10 0.2 2.9 1 –4 4 1 0.6 – 5.0 0.8 20 100 30 1.3 1.3 0.8 0.1 3 2.4 1.0 7 0.4 10 –2 3 3 Human Body Model Discharge Output Low, IOUT = – 500µA Output High, IOUT = 100µA (VCC = 3V) SHUTDOWN (Note 6) 0 ≤ VOUT ≤ VCC Sinking Current, VOUT = VCC Sourcing Current, VOUT = 0V Output Transition tHL High to Low (Note 7) Output Transition tLH Low to High q q q 2.7 2 The q denotes specifications which apply over the full operating temperature range. Note 1: Absolute maximum ratings are those values beyond which the life of the device may be impaired. Note 2: Testing is done at VCC = 3V, V + = 8V, V – = – 8V, and VON/OFF = 3V. Note 3: Supply current is measured with all driver inputs tied high. Note 4: Supply current measurements in SHUTDOWN are performed with VON/OFF = 0.1V, V + = 0V, V – = 0V. 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 (tPHL = 1.4V to 0V and tPLH = 1.4V to 0V). Note 6: Receiver RXA (Pins 10 and 15, S Package) remains functioning in SHUTDOWN. Note 7: 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 (tLH = 1.3V to 2.4V and tHL = 1.7V to 0.8V). 3 LT1332 TYPICAL PERFOR A CE CHARACTERISTICS Unloaded Supply Current vs Temperature 1.6 1.4 SUPPLY CURRENT (mA) SUPPLY CURRENT (mA) 1.2 1.0 I(V –) DRIVER OUTPUTS HIGH I(VCC) 12 10 8 6 4 2 I(V –) I(V +) THRESHOLD VOLTAGE (V) 0.8 0.6 0.4 0.2 0 –50 –25 0 75 50 25 TEMPERATURE (˚C) 100 125 I(V ) DRIVER OUTPUTS LOW + Leakage Current in Shutdown vs Temperature 150 125 LEAKAGE CURRENT (µA) 100 LEAKAGE CURRENT (µA) I(V +) = 8V I(V –) = – 8V SHORT-CIRCUIT CURRENT (mA) 100 75 50 I(VCC) = 3V 25 0 –50 –25 50 25 75 0 TEMPERATURE (˚C) LT1027 • TPC04 Slew Rate vs Load Capacitance 15 14 13 SR – DRIVER OUTPUT VOLTAGE (V) SLEW RATE (V/µs) 12 11 10 9 8 7 6 5 4 0 500 1000 1500 2000 CAPACITANCE (pF) 2500 3000 SR + 4 2 0 –2 –4 –6 V + = 8V V – = – 8V VCC = 3V SHORT-CIRCUIT CURRENT (mA) 4 UW LT1332 • TPC01 Supply Current vs Data Rate 16 14 RL = 3k CL = 2500pF ALL DRIVERS LOADED 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 ON/OFF Threshold vs Temperature I(VCC) 0 20 40 60 80 100 120 140 160 180 200 DATA RATE (k BAUD) LT1332 • TPC02 0 0 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) LT1332 • TPC03 Driver Leakage in Shutdown vs Temperature 30 25 Driver Short-Circuit Current vs Temperature ISC+ 20 15 10 5 0 –50 –25 ISC– 10 VOUT = 30V 1 VOUT = – 30V 100 125 0.1 –50 –25 0 50 25 75 TEMPERATURE (°C) 100 125 0 25 50 75 100 125 150 TEMPERATURE (°C) LT1332 • TPC06 LT1332 • TPC05 Driver Output Voltage vs Temperature 8 6 INPUT LOW Receiver Short-Circuit Current vs Temperature 30 25 20 15 10 ISC+ 5 0 –50 –25 RL = 3k ISC– INPUT HIGH 0 25 50 75 100 125 150 TEMPERATURE (°C) LT1332 • TPC08 –8 – 50 – 25 0 25 50 75 100 125 150 TEMPERATURE (°C) LT1332 • TPC09 LT1332 • TPC07 LT1332 TYPICAL PERFOR A CE CHARACTERISTICS Receiver Input Thresholds vs Supply Voltage 5 RECEIVER INPUT THRESHOLD (V) RECEIVER INPUT THRESHOLD (V) 2.5 VCC = 3V SUPPLY VOLTAGE/RECEIVER OUTPUT (V) 4 VTH HIGH 3 2 VTH LOW 1 0 2.0 2.5 3.0 3.5 4.0 4.5 5.0 SUPPLY VOLTAGE (V) LT1332 • TPC10 Receiver Output Waveforms INPUT 5V/DIV DRIVER OUTPUT RL = 3k CL = 2500pF 10V/DIV RX OUTPUT CL = 50pF 2V/DIV INPUT 5V/DIV PI FU CTIO S VCC: Input Supply Pin. VCC can vary from 2V to 6V to accommodate a wide range of logic levels, yet the system still responds correctly to RS232 signals. Supply current drops to 40µA in the SHUTDOWN mode. This pin should be decoupled with a 0.1µF ceramic capacitor. GND: Ground Pins. Pins 13 and 23 (S Package) must both be grounded for proper operation. ON/OFF: Controls the operation mode of the device and is CMOS compatible. A logic low puts the device in the SHUTDOWN mode which reduces input supply current to 40µA and places all of the drivers and four of the receivers in a high impedance state. A logic high fully enables the device. V+: Positive Supply Input (RS232 Drivers). V + should be greater than 6.5V and less than 13.2V to assure valid RS232 output signals. An additional decoupling capacitor may be required if the V + generator is located far away from the LT1332. V –: Negative Supply Pin (RS232 Drivers). This pin requires an external capacitor. When the device is powered from a switching regulator, the filter capacitor should be selected based on the maximum tolerable ripple for the specified minimum regulator on time. For some low frequency Burst ModeTM regulators, the filter capacitor should be relatively large (C ≥ 10µF). Low ESR tantalum Burst ModeTM is a trademark of Linear Technology Corporation UW 5.5 6.0 Receiver Input Thresholds vs Temperature 0.6 0.5 0.4 0.3 0.2 0.1 Receiver Output Voltage vs Supply Voltage RECEIVER OUTPUT LOW SINKING 500µA RECEIVER OUTPUT LOW SINKING 250µA 2.0 VTH HIGH 1.5 VTH LOW 1.0 RECEIVER OUTPUT HIGH (VCC – VOUT) SOURCING 0.5 0 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) LT1332 • TPC11 0 2.0 2.5 3.0 3.5 4.0 4.5 5.0 SUPPLY VOLTAGE (V) 5.5 6.0 LT1332 • TPC12 Driver Output Waveforms DRIVER OUTPUT RL = 3k 10V/DIV LT1332 • TPC13 LT1332 • TPC13 U U U 5 LT1332 PI FU CTIO S capacitors work well in this application. When V – is powered from an external supply, the filter capacitor can be considerably smaller (C ≥ 0.1µF). Ceramic capacitors work well under these conditions. V – should be greater than –13.2V and less than – 6.5V. Commutating Capacitor Input. When the LT1332 is used with a switching regulator, a charge pump capacitor should be connected from the regulator’s switch pin to the C – pin. Make the external capacitor 1µF or larger with low effective series resistance to maintain good charge pump efficiency. Low ESR tantalum capacitors (ESR < 2Ω) work well in this application. The C – pin should be left open when V – is powered from an external supply. DRIVER IN: RS232 Driver Input Pins. Inputs are TTL/ CMOS compatible, with threshold set to 1.2V. Unused inputs should not float; tie them to VCC. DRIVER OUT: Driver Outputs at RS232 Voltage Levels. Outputs are in a high impedance state when in SHUTDOWN mode, or VCC = 0V. Outputs are fully short-circuit protected from V – + 30V to V + – 30V with the power on, off or SHUTDOWN. Typical breakdowns are ± 45V. Applying higher voltages will not damage the device if the overdrive is moderately current limited. Although the outputs are protected, short circuits on one output C –: 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. RX IN: Receiver Inputs. These pins accept RS232 level signals (± 5V to ± 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. The receiver thresholds are specified at VCC = 3V. When VCC varies from 2V to 6V, the lower threshold increases about 3V. Regardless of these shifts, the device provides accurate data from valid RS232 input signals. A graph in the performance characteristics section shows typical changes in the thresholds. The active receiver (RXA, Pin 10, S Package) remains functional in SHUTDOWN. RX OUT: Receiver Outputs with TTL/CMOS Voltage Levels. Outputs are in a high impedance stage 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 SHUTDOWN mode. The active receiver (RXA, Pin 15, S Package) remains functional in SHUTDOWN. ESD PROTECTIO The RS232 line inputs of the LT1332 have on-chip 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 LT1332 must be connected to ground through low impedances. The power supply decoupling capacitors and charge pump storage capacitors provide this low impedance in normal applications 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, V +, V – and GND shorted to ground or connected with low ESR capacitors. 6 U U U U ESD Test Circuit 12V 0.1µF V+ C– 1 2 3 4 5 6 7 8 9 10 LT1332 24 V – 23 GND 22 21 20 19 18 17 16 15 14 13 LT1332 • TC –12V 0.1µF DRIVER OUT RX IN DRIVER OUT RS232 LINE PINS PROTECTED TO ±10kV RX IN RX IN RX IN DRIVER OUT RXA IN DRIVER IN RX OUT DRIVER IN RX OUT RX OUT RX OUT DRIVER IN RXA OUT RS232 ON/OFF GND 3V 0.1µF 11 NC 3V VCC 12 LT1332 APPLICATIO S I FOR ATIO Operation with a Switching Regulator The LT1332 is designed to be powered from an external switching regulator which may be used elsewhere for power conditioning. In a typical application, the LT1332 shares the regulator’s positive output, while charge is capacitively pumped from the regulator’s switch pin to the negative supply. Schottky rectifiers built into the LT1332 simplify the charge pump design. When used with a micropower switcher like the LT1109A, the Burst ModeTM operation of the charge pump resembles the switching characteristics of the LT1237 and similar devices. The V – supply is not directly regulated. The circuit relies on cross regulation and the regulator’s minimum duty cycle to control V –. Select the C – and V – storage capacitors so that when the regulator operates at minimum duty cycle, sufficient charge will transfer to the V – storage cap to maintain a voltage of at least – 6.5V. While only 0.1µF ceramic decoupling capacitors are needed on the positive supply inputs, low ESR tantalum capaci+ + V+ LT1332 C– GND V– 1µF 1µF V+ LT1332 C– GND V– LT1332 C– GND LT1332 C– GND 3V VCC INPUT ON/OFF 0.1µF ON/OFF 3V VCC GND 0.1µF ON/OFF 3V VCC GND 0.1µF ON/OFF 3V VCC GND 0.1µF ON/OFF 3V VCC GND *L1 = SUMIDA CD105-101K OR COILCRAFT DO3316-104 **1% METAL FILM 2.7V < VIN < 5.5V I(VIN) < 14mA (UNLOADED) VIN L1* 100µH 1N5817 8V + 68µF VIN VSW 22µF + LT1172 GND FB VC 135k** 25k** OPTIONAL SHUTDOWN VN2222LL 1k 0.1µF LT1332 • F01 Figure 1. Multiple LT1332s Powered from a Single LT1172 DC/DC Converter 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. + + + + 0.1µF 10µF 0.1µF U tors should be used in the charge pump to reduce voltage losses. The C – capacitor should be at least 1µF and the V – capacitor should be 5 to 10 times bigger. As a rule of thumb, make the V – capacitor at least 1/DCMIN times bigger than the C – capacitor where DCMIN is the regulator’s minimum duty cycle. Using large values for the V – capacitor reduces ripple on the V – supply. Multiple Transceivers The circuit in Figure 1 demonstrates how the LT1332 may be used with different types of switching regulators. Four LT1332s are powered from a single PWM DC/DC converter using an LT1172. Even with all twelve drivers heavily loaded (RL = 3k, CL = 2500pF), the circuit generates fully compliant RS232 signals at 120k baud. Operations with External Supplies When external RS232 supplies are available (6.5V ≤ V + ≤ 13.2V, – 13.2V ≤ V – ≤ – 6.2V) the LT1332 can be used as a stand-alone unit. Capacitor selection is consider+ + 1µF V+ V– 1µF V+ V– 10µF 0.1µF 10µF 0.1µF 10µF W UU 7 LT1332 APPLICATIO S I FOR ATIO ably simpler. Decouple V + and V – with 0.1µF ceramic capacitors. Shutdown Control The LT1332 has an ON/OFF pin that controls the device’s mode of operation. With the ON/OFF pin high and the device operated unloaded, the LT1332 draws 1mA of supply current. With the ON/OFF pin low, the device PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted. G Package 28-Lead Plastic SSOP 0.205 – 0.212* (5.20 – 5.38) 0° – 8° 0.005 – 0.009 (0.13 – 0.22) 0.022 – 0.037 (0.55 – 0.95) 0.0256 (0.65) BSC 0.010 – 0.015 (0.25 – 0.38) *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006 INCH (0.15mm). 0.045 (1.14) 0.002 – 0.008 (0.05 – 0.21) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 0.600 – 0.625 (15.240 – 15.875) 0.130 ± 0.005 (3.302 ± 0.127) 0.015 (0.381) MIN 0.045 – 0.065 (1.143 – 1.651) 0.009 – 0.015 (0.229 – 0.381) ( +0.025 0.625 –0.015 +0.635 15.87 –0.381 ) 0.125 (3.175) MIN 0.035 – 0.080 (0.889 – 2.032) 0.100 ± 0.010 (2.540 ± 0.254) 0.291 – 0.299 (7.391 – 7.595) (NOTE 2) 0.005 (0.127) RAD MIN 0.010 – 0.029 × 45° (0.254 – 0.737) 0.093 – 0.104 (2.362 – 2.642) 0° – 8° TYP 0.050 (1.270) TYP 0.014 – 0.019 (0.356 – 0.482) NOTE 1 0.394 – 0.419 (10.007 – 10.643) 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. 2. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006 INCH (0.15mm). 8 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7487 (408) 432-1900 q FAX: (408) 434-0507 q TELEX: 499-3977 U enters micropower shutdown mode in which the current drawn from VCC drops to typically 40µA. If the power applied to V + and V – remains on in shutdown, there will be approximately 100µA of leakage from each supply. If these supplies drop to zero, leakage current also drops to zero. In shutdown mode one receiver remains active which may be useful for detecting start-up signals for the transceiver. 0.397 – 0.407* (10.07 – 10.33) 28 27 26 25 24 23 22 21 20 19 18 17 16 15 U W UU 0.068 – 0.078 (1.73 – 1.99) 0.301 – 0.311 (7.65 – 7.90) 0.045 (1.14) N Package 28-Lead Plastic DIP 0.070 (1.778) TYP 28 27 26 25 24 23 1.455 (36.957) MAX 22 21 20 19 18 17 16 15 0.505 – 0.560 (12.827 – 14.224) 0.018 ± 0.003 (0.457 ± 0.076) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 S Package 24-Lead Plastic SOL 0.037 – 0.045 (0.940 – 1.143) 24 23 22 21 0.598 – 0.614 (15.190 – 15.600) (NOTE 2) 20 19 18 17 16 15 14 13 0.004 – 0.012 (0.102 – 0.305) 1 2 3 4 5 6 7 8 9 10 11 12 LT/GP 1193 10K REV 0 • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 1993