TC2574 TELCOM | Alldatasheet
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0.5A Step-Down Switching Regulator TC2574-1 1/6/00 0.5A Step-Down Switching Regulator GENERAL DESCRIPTION The TC2574 series of regulators are monolithic inte- grated circuits ideally suited for easy and convenient design of a step-down switching regulator (buck converter). All circuits of this series are capable of driving a 0.5A load with excellent line and load regulation. These devices are avail- able in fixed output voltages of 3.3V, 5.0V, 12V and an adjustable output version. These regulators were designed to minimize the num- ber of external components to simplify the power supply design. Standard series of inductors optimized for use with the TC2574 are offered by several different inductor manu- facturers. Since the TC2574 converter is a switch–mode power supply, its efficiency is significantly higher in comparison with popular three-terminal linear regulators, especially with higher input voltages. In most cases, the power dissipated by the TC2574 regulator is so low, that the copper traces on the printed circuit board are normally the only heatsink needed and no additional heatsinking is required. The TC2574 features include a guaranteed ±4% toler- ance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency (±2% over 0°C to +125°C). External shutdown is included, featuring 60µA (typical) standby current. The output switch includes cycle–by–cycle current limiting, as well as thermal shutdown for full protection under fault conditions.
FEATURES
I 3.3V, 5.0V, 12V and Adjustable Output Versions I Adjustable Version Output Voltage Range, 1.23 to 37 V ±4% Max Over Line and Load Conditions I Guaranteed 0.5 A Output Current I Wide Input Voltage Range: 4.75 to 40V I Requires Only 4 External Components I 52kHz Fixed Frequency Internal Oscillator I TTL Shutdown Capability, Low Power Standby Mode I High Efficiency I Uses Readily Available Standard Inductors I Thermal Shutdown and Current Limit Protection
APPLICATIONS
I Simple and High–Efficiency Step–Down (Buck) Regulator I Efficient Pre-Regulator for Linear Regulators I On–Card Switching Regulators I Positive to Negative Converters (Buck–Boost) I Negative Step-Up Converters I Power Supply for Battery Chargers
ORDERING INFORMATION
TC2574-3.3VPA 8-Pin PDIP (Narrow) –40 to +125°C TC2574-5.0VPA 8-Pin PDIP (Narrow) –40 to +125°C TC2574-12.0VPA 8-Pin PDIP (Narrow) –40 to +125°C TC2574-VPA* 8-Pin PDIP (Narrow) –40 to +125°C TC2574-VOE* 16-Pin SOIC (Wide) –40 to +125°C TC2574 TelCom Semiconductor reserves the right to make changes in the circuitry and specifications of its devices. PIN CONFIGURATIONS SIG GND FB NC NC OUTPUT TC2574 NC NC NC NC NC NC NC NC PWR GND ON/OFF SIG GND FB OUTPUT VIN VIN NC NC PWR GND TC2574 ON/OFF 16-Pin SOIC (Wide) 8-Pin PDIP (Narrow) Note: *ADJ = 1.23 To 37V.
0.5A Step-Down Switching Regulator ABSOLUTE MAXIMUM RATINGS* Thermal Resistance, Junction-to-Ambient... 100°C/W (Human Body Model: C = 100 pF, R = 1.5 kΩ) Operating Junction Temperature Range .... –40 to +125*C *This is a stress rating only, and functional operation of the device at these or any other conditions beyond those indicated in the operation section of the specifications is not implied. Exposure to absolute maximum ratings conditions for extended periods of time may affect device reliability. ELECTRICAL CHARACTERISTICS: Unless otherwise specified, VIN = 12V for the 3.3V, 5.0V, and Adjustable version,VIN = 25V for the 12V version. ILOAD = 100mA. For typical values TJ = 25°C, for min/max values TJ is the operating junction temperature range that applies (Note 2), unless otherwise noted. Symbol Parameter Test Conditions Min Typ Max Units TC2574-3.3 [( Note 1) Test Circuit Figure 2] VOUT Output Voltage VIN = 12V, ILOAD = 100mA, TJ = 25°C 3.234 3.3 3.366 V 4.75V ≤ VIN ≤ 40V, 0.1A ≤ ILOAD ≤ 0.5AV TJ = 25°C 3.168 3.3 3.432 TJ = –40°C to +125° 3.135 3.465 η Efficiency VIN = 12V, ILOAD = 0.5 A TC2574-5 [( Note 1) Test Circuit Figure 2] VOUT Output Voltage VIN = 12V, ILOAD = 100mA, TJ = 25°C 4.9 5.0 5.1 V 7.0V ≤ VIN ≤ 40V, 0.1A ≤ ILOAD ≤ 0.5A TJ = 25°C 4.8 5.0 5.2 TJ = –40°C to +125°C 4.75 5.25 η Efficiency VIN = 12V, ILOAD = 0.5 A TC2574-12 [( Note 1) Test Circuit Figure 2] VOUT Output Voltage VIN = 25V, ILOAD = 100mA, TJ = 25°C 11.76 12.24 V 15V ≤ VIN ≤ 40V, 0.1A ≤ ILOAD ≤ 0.5A TJ = 25°C 11.52 12.48 TJ = –40°C to +125°C 11.4 12.6 η Efficiency VIN = 15V, ILOAD = 0.5 A TC2574-Adjustable Version [( Note 1) Test Circuit Figure 2] VFB Feedback Voltage VIN = 12V, ILOAD = 100mA, VOUT = 5.0V, 1.217 1.23 1.243 V TJ = 25*C VFBT Feedback Voltage 7.0V ≤ VIN ≤ 40V, 0.1A ≤ ILOAD ≤ 0.5A VOUT = 5.0V TJ = 25°C 1.193 1.23 1.267 TJ = –40°C to +125°C 1.18 1.28 η Efficiency VIN = 12V, ILOAD = 0.5A, VOUT = 5.0V NOTES: 1. External components such as the catch diode, inductor, input and output capacitors can affect the switching regulator system performance. When the TC2574 is used as shown in the Figure 2 test circuit, the system performance will be as shown in the system parameters section of the Electrical Characteristics. 2. Tested junction temperature range for the TC2574: TLOW = –40°C THIGH = +125°C
0.5A Step-Down Switching Regulator TC2574-1 1/6/00 ELECTRICAL CHARACTERISTICS: Unless otherwise specified, VIN = 12V for the 3.3V, 5.0V, and Adjustable version,VIN = 25V for the 12V version. ILOAD = 100mA. For typical values TJ = 25°C, for min/max values TJ is the operat- ing junction temperature range that applies (Note 2), unless otherwise noted. Symbol Parameter Test Conditions Min Typ Max Units TC2574-ADJUSTABLE VERSION [(Note 1) Test Circuit Figure 2] Ib Feedback Bias Current VOUT = 5.0V (Adjustable Version Only) nA TJ = 25°C 100 TJ = –40°C to +125°C 200 fO Oscillator Frequency (Note 3) TJ = 25°C kHz TJ = 0 to +125°C TJ = –40 to +125°C VSAT Saturation Voltage IOUT = 0.5 A, (Note 4) V TJ = 25°C 1.0 1.2 TJ = –40 to +125°C 1.4 DC Max Duty Cycle (“on”) [Note 5] ICL Current Limit Peak Current (Notes 3 and 4) A TJ = 25°C 0.7 1.0 1.6 TJ = –40 to +125°C 0.65 1.8 IL Output Leakage Current (Notes 6 and 7), TJ = 25°C mA Output = 0 V 0.6 2.0 Output = – 1.0 V IQ Quiescent Current (Note 6) mA TJ = 25°C 5.0 9.0 TJ = –40 to +125°C ISTBY Standby Quiescent Current ON/OFF Pin = 5.0 V (“off”) µA TJ = 25°C 200 TJ = –40 to +125°C 400 ON/OFF Pin Logic Input Level V VIH VOUT = 0V TJ = 25°C 2.2 1.4 TJ = –40 to +125°C 2.4 VIL Nominal Output Voltage TJ = 25°C 1.2 1.0 TJ = –40 to +125°C 0.8 ON/OFF Pin Input Current mA µA IIH ON/OFF Pin = 5.0V (“off”), TJ = 25°C IIL ON/OFF Pin Input Current mA µA ON/OFF Pin = 0 (“on”), TJ = 25°C 5.0 NOTES: 1. External components such as the catch diode, inductor, input and output capacitors can affect the switching regulator system performance. When the TC2574 is used as shown in the Figure 2 test circuit, the system performance will be as shown in the system parameters section of the Electrical Characteristics. 2. Tested junction temperature range for the TC2574: TLOW = –40°C T high = +125°C 3. The oscillator frequency reduces to approximately 18kHz in the event of an output short or an overload which causes the regulated output voltage to drop approximately 40% from the nominal output voltage. This self protection feature lowers the average power dissipation of the IC by lowering the minimum duty cycle from 5% down to approximately 2%. 4. Output (Pin 2) sourcing current. No diode, inductor or capacitor connected to the output pin. 5. Feedback (Pin 4) removed from output and connected to 0 V. 6. Feedback (Pin 4) removed from output and connected to 12V for the Adjustable, 3.3V, and 5.0V versions, and 25V for the 12V version, to force the output transistor OFF. 7. VIN = 40 V.
0.5A Step-Down Switching Regulator REPRESENTATIVE BLOCK DIAGRAM AND TYPICAL APPLICATION PIN DESCRIPTION Pin No. Pin No 8-Pin PDIP 16-Pin SOIC Symbol
Description
This pin is the positive input supply for the TC2574 step–down switching regulator. In order to minimize voltage transients and to supply the switching currents needed by the regulator, a suitable input bypass capacitor must be present (CIN in Figure 1). Output This is the emitter of the internal switch. The saturation voltage VSAT of this output switch is typically 1.0V. It should be kept in mind that the PCB area connected to this pin should be kept to a minimum in order to minimize coupling to sensitive circuitry. SIG Gnd Circuit signal ground pin. See the information about the printed circuit board layout. PWR GND Circuit power ground pin. See the information about the printed circuit board layout. FB This pin senses regulated output voltage to complete the feedback loop. The signal is divided by the internal resistor divider network R2, R1 and applied to the non–inverting input of the internal error amplifier.In the adjustable version of the TC2574 switching regulator, this pin is the direct input of the error amplifier and the resistor network R2, R1 is connected externally to allow programming of the output voltage. ON/OFF It allows the switching regulator circuit to be shut down using logic level signals, thus dropping the total input supply current to approximately 80µA. The input threshold voltage is typically 1.5V. Applying a voltage above this value (up to +VIN ) shuts the regulator off. If the voltage applied to this pin is ower than 1.5 V or if this pin is left open, the regulator will be in the “on” condition. TC2574 3.1V Internal Regulator ON/OFF ON/OFF Latch Freq. Shift 18kHz Reset Thermal Shutdown
1.0 Amp
+VIN CIN VOUT Driver Output PWR GND For Adjustable version R1 = open, R2 = 0Ω Load Feedback Unregulated DC Input SIG GND 1.0k Current Limit Comparator Fixed gain Error Amplifier 52kHz Oscillator 1.235V Band-Gap Reference Output Voltage Versions 3.3V 5.0V 12V R2 (Ω) 1.7k 3.1k 8.84k
0.5A Step-Down Switching Regulator TC2574-1 1/6/00 Procedure (Fixed Output Voltage Version) In order to simplify the switching regulator design, a step-by-step design procedure and examples are provided. Procedure Example Given Parameters: Given Parameters: VOUT = Regulated Output Voltage (3.3V, 5.0V or 12V) VOUT = 5.0 V VIN(max) = Maximum Input Voltage VIN (max) = 15 V ILOAD(max) = Maximum Load Current ILOAD (max) = 0.4 A 1. Controller IC Selection 1. Controller IC Selection According to the required input voltage, output voltage and According to the required input voltage, output voltage, current select the appropriate type of the controller polarity and current value, use the TC2574–5 IC output voltage version. controlller IC. 2. Input Capacitor Selection (CIN ) 2. Input Capacitor Selection (CIN ) To prevent large voltage transients from appearing at the input A 22µF, 25V aluminium electrolytic capacitor tantalum electrolytic bypass capacitor is needed between the located near to the input and ground pins provides input pin +VIN and ground pin Gnd. This capacitor should be sufficient bypassing. located close to the IC using short leads. This capacitor should have a low ESR (Equivalent Series Resistance) value. 3. Catch Diode Selection (D1) 3. Catch Diode Selection (D1) A. Since the diode maximum peak current exceeds the A. For this example the current rating of the diode is 1.0A regulator maximum load current. For a robust design the diode should have a current rating equal to the maximum current limit of the TC2574 to be able to withstand a continuous output short. B. The reverse voltage rating of the diode should be at least B. Use a 20V 1N5817 Schottky diode, or any of the 1.25 times the maximum input voltage. suggested fast recovery diodes shown in Table 1. 4. Inductor Selection (L1) 4. Inductor Selection (L1) A. According to the required working conditions, select the A. Use the inductor selection guide shown in Figure 38. correct inductor value using the selection guide from Figures 39 to 41. B. From the appropriate inductor selection guide, identify the B. From the selection guide, the inductance area inductance region intersected by the Maximum Input Voltage intersected by the 15V line and 0.4A line is 330. line and the Maximum Load Current line. Each region is identified by an inductance value and an inductor code. C. Select an appropriate inductor from the several different C. Inductor value required is 330µH. From Table 2, manufacturers part numbers listed in Table 2. The designer choose an inductor from any of the listed must realize that the inductor current rating must be higher manufacturers. than the maximum peak current flowing through the inductor. This maximum peak current can be calculated as follows: IP (max) = ILOAD (max)+ (VIN – VOUT ) tON where tON is the "on" time of the power switch and tON = VOUT x 1.0 VIN fOSC For additional information about the inductor, see the inductor section in the “EXTERNAL COMPONENTS” section of this data sheet.
0.5A Step-Down Switching Regulator Procedure (Fixed Output Voltage Version) (Continued) In order to simplify the switching regulator design, a step-by-step design procedure and examples are provided. Procedure Example 5. Output Capacitor Selection (COUT) A. Since the TC2574 is a forward–mode switching regulator with voltage mode control, its open loop 2–pole–1–zero frequency characteristic has the dominant pole–pair deter mined by the output capacitor and inductor values. For stable operation and an acceptable ripple voltage, (approximately 1% of the output voltage) a value between 100µF and 470µF is recommended. B. Due to the fact that the higher voltage electrolytic capacitors generally have lower ESR (Equivalent Series Resistance) numbers, the output capacitor’s voltage rating should be at least 1.5 times greater than the output voltage. For a 5.0Vregulator, a rating at least 8.0V is a appropriate, and a 10Vor 16V rating is recommended. 5. Output Capacitor Selection (COUT ) A. COUT = 100µF to 470µF standard aluminium electrolytic. B. Capacitor voltage rating = 20V. Procedure (Adjustable Output Version: TC2574-ADJ) Procedure Example Given Parameters: VOUT = Regulated Output Voltage VIN (max) = Maximum DC Input Voltage ILOAD (max) = Maximum Load Current 1. Programming Output Voltage To select the right programming resistor R1 and R2 value (see Figure 2) use the following formula: VOUT = VREF (1.0 + R2 ) where VREF = 1.23V Resistor R1 can be between 1.0kΩ and 5.0kΩ. (For best temperature coefficient and stability with time, use 1% metal film resitors). R2 = R1 ( VOUT – 1.0) VREF 2. Input Capacitor Selection (CIN ) To prevent large voltage transients from appearing at the input and for stable operation of the converter, an aluminium or tantalum electrolytic bypass capacitor is needed between the input pin +VIN and ground pin GND. This capacitor should be located close to the IC using short leads. This capacitor should have a low ESR (Equivalent Series Resistance) value. For additional information see input capacitor section in the “EXTERNAL COMPONENTS” section of this data sheet. Given Parameters: VOUT = 24V VIN (max) = 40V ILOAD (max) = 0.4A 2. Input Capacitor Selection (CIN ) A 22µF aluminium electrolytic capacitor located near the input and ground pin provides sufficient bypassing. 1. Programming Output Voltage (selecting R1 and R2) Select R1 and R2 VOUT = 1.23 (1.0 + R2 ) Select R1 = 1.0kΩ VREF 1.23V R1 = 18.51kΩ, choose a 18.7kΩ metal film resistor.
0.5A Step-Down Switching Regulator TC2574-1 1/6/00 Procedure (Adjustable Output Version): (TC2574-ADJ) (Continued) Procedure Example 3. Catch Diode Selection (D1) A. Since the diode maximum peak current exceeds the regulator maximum load current the catch diode current rating must be at least 1.2 times greater than the maximum load current. For a robust design, the diode should have a current rating equal to the maximum current limit of the TC2574 to be able to with stand a continuous output short. B. The reverse voltage rating of the diode should be at least 1.25 times the maximum input voltage. 4. Inductor Selection (L1) A. Use the following formula to calculate the inductor Volt x microsecond [V x µs] constant: E x T = ( VIN – VOUT) VOUT x 106 [V x µsec] VIN F[Hz] B. Match the calculated E x T value with the corresponding number on the vertical axis of the Inductor Value Selection Guide shown in Figure 39. This E x T constant is a measure of the energy handling capability of an inductor and is dependent upon the type of core, the core area, the number of turns, and the duty cycle. C. Next step is to identify the inductance region intersected by the E x T value and the maximum load current value on the horizontal axis shown in Figure 8. D. From the inductor code, identify the inductor value. Then select an appropriate inductor from Table 2. The inductor chosen must be rated for a switching frequency of 52kHz and for a current rating of 1.15 x ILOAD . The inductor current rating can also be determined by calculating the inductor peak current: IP (max) = ILOAD(max) + (VIN – VOUT) tON where tON is the "on" time of the power switch and tON = (VOUT x 1.0 ) VIN fOSC For additional information about the inductor, see the inductor section in the “EXTERNAL COMPONENTS” section of this data sheet. 3. Catch Diode Selection (D1) A. For this example, a 1.0A current rating is adequate. B. Use a 50V MBR150 Schottky diode or any suggested fast recovery diodes in Table 1. 4. Inductor Selection (L1) A. Calculate E x T [V xµsec] constant: E x T = (40 – 24) x 24 x 1000 = 105[V x µsec] 40 52 B. E x T = 185 [V x µsec] C. ILOAD(max) = 0.4 A Inductance Region = 1000 D. Proper inductor value = 1000µH Choose the inductor from Table 2.
- Output Capacitor Selection (COUT )
determined by the output capacitor and inductor values. times larger than the above formula yields. appropriate, and a 10V or 16V rating is recommended.
- Output Capacitor Selection (COUT )
100µF electrolytic capacitor. Table 1. Diode Selection Guide gives an overview about through-hole diodes for an effective design.
1.0 Amp Diodes
Table 2. Inductor Selection Guide Table 3. Example of Several Inductor Manufacturers Phone/Fax Numbers
0.5A Step-Down Switching Regulator EXTERNAL COMPONENTS Input Capacitor (CIN) The Input Capacitor Should Have a Low ESR For stable operation of the switch mode converter a lowESR (Equivalent Series Resistance) aluminium or solid tantalum bypass capacitor is needed between the input pinand the ground pin, to prevent large voltage transients from appearing at the input. It must be located near the regulator and use short leads. With most electrolytic capaci- tors, the capacitance value decreases and the ESR in- creases with lower temperatures. For reliable operation in temperatures below –25°C larger values of the input capaci- tor may be needed. Also paralleling a ceramic or solid tantalum capacitor will increase the regulator stability at cold temperatures. RMS Current Rating of CIN The important parameter of the input capacitor is the RMS current rating. Capacitors that are physically large and have large surface area will typically have higher RMS current ratings. For a given capacitor value, a higher voltage electrolytic capacitor will be physically larger than a lower voltage capacitor, and thus be able to dissipate more heat to the surrounding air, and therefore will have a higher RMS current rating. The consequences of operating an electro- lytic capacitor beyond the RMS current rating is a shortened operating life. In order to assure maximum capacitor oper- ating lifetime, the capacitor’s RMS ripple current rating should be: IRMS > 1.2 x d x ILOAD where d is the duty cycle, for a continuous mode buck regualor d = tON = VOUT T VIN and d = tON = IVOUTI for a buck-boost regulator. T IVOUTI + VIN Output Capacitor (COUT) For low output ripple voltage and good stability, low ESR output capacitors are recommended. An output capacitor has two main functions: it filters the output and provides regulator loop stability. The ESR of the output capacitor and the peak–to–peak value of the inductor ripple current are the main factors contributing to the output ripple voltage value. Standard aluminium electrolytics could be adequate for some applications but for quality design, low ESR types are recommended. An aluminium electrolytic capacitor’s ESR value is re- lated to many factors, such as the capacitance value, the voltage rating, the physical size and the type of construction. In most cases, the higher voltage electrolytic capacitors have lower ESR value. Often capacitors with much higher voltage ratings may be needed to provide low ESR values, that are required for low output ripple voltage. The Output Capacitor Requires an ESR Value that has an Upper and Lower Limit As mentioned above, a low ESR value is needed for low output ripple voltage, typically 1% to 2% of the output voltage. But if the selected capacitor’s ESR is extremely low (below 0.03 Ω), there is a possibility of an unstable feedback loop, resulting in oscillation at the output. This situation can occur when a tantalum capacitor, that can have a very low ESR, is used as the only output capacitor. At Low Temperatures, Put in Parallel Aluminium Electrolytic Capacitors with Tantalum Capacitors Electrolytic capacitors are not recommended for tem- peratures below –25°C. The ESR rises dramatically at cold temperatures and typically rises 3 times at –25°C and as much as 10 times at –40°C. Solid tantalum capacitors have much better ESR spec at cold temperatures and are recom- mended for temperatures below –25°C. They can be also used in parallel with aluminium electrolytics. The value of the tantalum capacitor should be about 10% or 20% of the total capacitance. The output capacitor should have at least 50% higher RMS ripple current rating at 52kHz than the peak–to–peak inductor ripple current. Catch Diode Locate the Catch Diode Close to the TC2574 The TC2574 is a step–down buck converter, it requires a fast diode to provide a return path for the inductor current when the switch turns off. This diode must be located close to the TC2574 using short leads and short printed circuit traces to avoid EMI problems. Use a Schottky or a Soft Switching Ultra–Fast Recovery Diode Since the rectifier diodes are very significant source of losses within switching power supplies, choosing the recti- fier that best fits into the converter design is an important process. Schottky diodes provide the best performance because of their fast switching speed and low forward voltage drop. They provide the best efficiency especially in low output voltage applications (5.0 V and lower). Another choice could be Fast–Recovery, or Ultra–Fast Recovery diodes. It has to be noted, that some types of these diodes with an abrupt turnoff characteristic may cause instability or EMI troubles.
which can provide even better heat path to the ambient. the maximum junction temperature below 125°C.
- PD(max) – maximum regulator power dissipation in the
- TA(max) – maximum ambient temperature in the
- TJ (max) – maximum allowed junction temperature
operating lifetime of the component is halved.
- ΘJC – package thermal resistance junction–case.
- ΘJA – package thermal resistance junction–
data sheet or ΘJC and ΘJA values). turn-off can be neglected if a proper type catch diode is used. will enerate some additional heat. Figure 8. Inverting Buck-Boost Develops –12V
0.5A Step-Down Switching Regulator TAPE AND REEL DIMENSIONS PIN 1 PIN 1 Component Taping Orientation for 16-Pin SOIC User Direction of Feed User Direction of Feed Standard Reel Component Orientation for TR Suffix Device Reverse Reel Component Orientation for RT Suffix Device W = Width of Carrier Tape P = Pitch Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size 16-Pin SOIC 16 mm 8 mm 2500 13 in Carrier Tape, Reel Size, and Number of Components Per Reel
0.5A Step-Down Switching Regulator TC2574-1 1/6/00 Sales Offices TelCom Semiconductor, Inc.
1300 Terra Bella Avenue
P.O. Box 7267 Mountain View, CA 94039-7267 TEL: 650-968-9241 FAX: 650-967-1590 E-Mail: liter@telcom-semi.com TelCom Semiconductor, GmbH Lochhamer Strasse 13 D-82152 Martinsried Germany TEL: (011) 49 89 895 6500 FAX: (011) 49 89 895 6502 2 TelCom Semiconductor H.K. Ltd.
10 Sam Chuk Street, Ground Floor
San Po Kong, Kowloon Hong Kong TEL: (011) 852-2350-7380 FAX: (011) 852-2354-9957 PACKAGE DIMENSIONS Dimensions: inches (mm) 8-Pin PDIP (Narrow) 3°MIN. PIN 1 .260 (6.60) .240 (6.10) .045 (1.14) .030 (0.76) .070 (1.78) .040 (1.02) .400 (10.16) .348 (8.84) .200 (5.08) .140 (3.56) .150 (3.81) .115 (2.92) .110 (2.79) .090 (2.29) .022 (0.56) .015 (0.38) .040 (1.02) .020 (0.51) .015 (0.38) .008 (0.20) .310 (7.87) .290 (7.37) .400 (10.16) .310 (7.87) MAX. PIN 1 .299 (7.59) .290 (7.40) .413 (10.49) .398 (10.10) .019 (0.48) .014 (0.36) .012 (0.30) .004 (0.10) .104 (2.64) .097 (2.46) .013 (0.33) .009 (0.23) .050 (1.27) .015 (0.40) .419 (10.65) .398 (10.10) .050 (1.27) TYP. 16-Pin SOIC (Wide)