首页资源分类电源技术 > MC14578.pdf

MC14578.pdf

已有 455103个资源

下载专区

文档信息举报收藏

标    签: MC14578

分    享:

文档简介

MC14578.pdf

文档预览

MOTOROLA SEMICONDUCTOR TECHNICAL DATA Order this document by MC14578/D CMOS Micro-Power Comparator plus Voltage Follower The MC14578 is an analog building block consisting of a very–high input impedance comparator. The voltage follower allows monitoring the noninverting input of the comparator without loading. Four enhancement–mode MOSFETs are also included on chip. These FETs can be externally configured as open–drain or totem–pole outputs. The drains have on–chip static–protecting diodes. Therefore, the output voltage must be main- " tained between VSS and VDD. The chip requires one external component. A 3.9 MΩ 10% resistor must be connected from the Rbias pin to VDD. This circuit is designed to operate in smoke detector systems that comply with UL217 and UL268 specifications. • Applications: Pulse Shapers Threshold Detectors Low–Battery Detectors Line–Powered Smoke Detectors Liquid/Moisture Sensors CO Detector and Micro Interface • Operating Voltage Range: 3.5 to 14 V * • Operating Temperature Range: 30° to 70°C " • Input Current (IN + Pin): 1 pA @ 25°C (DIP Only) • Quiescent Current: 10 µA @ 25°C • Electrostatic Discharge (ESD) Protection Circuitry on All Pins MC14578 16 1 P SUFFIX PLASTIC DIP CASE 648–08 ORDERING INFORMATION MC14578P PLASTIC DIP PIN ASSIGNMENT VDD 1 COMP OUT 2 IN A 3 IN B 4 OUT A 5 OUT B 6 IN C 7 OUT C1 8 16 NC 15 IN + 14 NC 13 BUFF OUT 12 IN— 11 Rbias 10 VSS 9 OUT C2 IN+ 15 *IN 12 Rbias 11 + COMP – BIAS CKT + BUFF – LOGIC DETAIL 2 COMP OUT 3 IN A 13 BUFF OUT 4 IN B 5 OUT A 6 OUT B 7 IN C PIN 1 = VDD PIN 10 = VSS PINS 14, 16 = NO CONNECTION 9 OUT C2 8 OUT C1 © MMotootroolrao, lIanc.S2e0n00sor Device Data 1 MC14578 MAXIMUM RATINGS* (Voltages Referenced to VSS) Symbol Parameter VDD DC Supply Voltage Vin DC Input Voltage Vout DC Output Voltage Iin DC Input Current, Except IN + Iin DC Input Current, IN + Iout DC Output Current, per Pin IDD DC Supply Current, VDD and VSS Pins Value Unit *0.5 to +14 V *0.5 to VDD +0.5 V *0.5 to VDD +0.5 V "10 mA "1.0 mA "25 mA "50 mA PD Power Dissipation, per Package Tstg Storage Temperature 500 mW *65 to +150 °C TL Lead Temperature (10–Second Soldering) 260 °C *Maximum Ratings are those values beyond which damage to the device may occur. This device contains protection circuitry to guard against damage due to high static voltages or electric fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to this high–impedance circuit. For proper operation, Vin and Vout should be constrained to the range VSS ≤ (Vin or Vout) ≤ VDD. Unused inputs must always be tied to an appropriate logic voltage level (e.g., either VSS or VDD). Unused outputs must be left open. 2 Motorola Sensor Device Data MC14578 ELECTRICAL CHARACTERISTICS (Voltages Referenced to VSS, Rbias = 3.9 MΩ to VDD, TA = –30° to 70°C Unless Otherwise Indicated) Symbol Parameter Test Condition VDD Guaranteed V Limit Unit VDD Power Supply Voltage Range VIL Maximum Low–Level Input Voltage, MOSFETs t Vout = 9.0 V, |Iout| 1 µA Wired as Inverters; i.e., IN A tied to IN B, OUT A to OUT B, OUT C1 to OUT C2. VIH Minimum High–Level Input Voltage, MOSFETs t Vout = 1.0 V, |Iout| 1 µA Wired as Inverters; i.e., IN A tied to IN B, OUT A to OUT B, OUT C1 to OUT C2. VIO Comparator Input Offset Voltage TA = 25°C, Over Common Mode Range TA = 0° to 50°C, Over Common Mode Range — 3.5 to 14.0 V 10.0 2.0 V 10.0 8.0 V 10.0 "50 mV 3.5 to "75 14.0 VCM Comparator Common Mode Voltage Range 3.5 to 14.0 * 0.7 to VDD 1.5 V VOL * Maximum Low–Level Comparator Output Voltage IN +: Vin = VSS, IN : Vin = VDD, 10.0 0.5 V Iout = 30 µA VOH Minimum High–Level Comparator Output Voltage * IN +: Vin = VDD, IN : Vin = VSS, * Iout = 30 µA 10.0 9.5 V VOO Buffer Amp Output Offset Voltage Rload = 10 MΩ to VDD or VSS, Over — "100 mV Common Mode Range VOL Maximum Low–Level Output Voltage, MOSFETs OUT C1, OUT C2: Iout = 1.1 mA Wired as Inverters; i.e., IN A tied to IN B, OUT A to OUT B, OUT C1 to OUT C2. OUT A, OUT B: Iout = 270 µA VOH Minimum High–Level Output Voltage, MOSFETs * OUT C1, OUT C2: Iout = 1.1 mA Wired as Inverters; i.e., IN A tied to IN B, OUT A to OUT B, OUT C1 to OUT C2. OUT A, OUT B: Iout = 270 µA Iin Maximum Input Leakage Current IN + (DIP Only) TA = 25°C, 40% R.H., Vin = VSS or VDD IN + (DIP Only) * IN + (SOG), IN A, IN B, IN C, IN TA = 50°C, Vin = VSS or VDD Vin = VSS or VDD IOZ Maximum Off–State MOSFET Leakage Current IN A, IN C: Vin = VDD, OUT A, OUT C2: Vout = VSS or VDD IN B, IN C: Vin = VSS, OUT B, OUT C1: Vout = VSS or VDD IDD Maximum Quiescent Current TA = 25°C * * IN A, IN B, IN C: Vin = VSS or VDD, |VIN + VIN | = 100 mV, Iout = 0 µA Cin Maximum Input Capacitance IN + f = 1 kHz Other Inputs 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 — — 0.5 V 0.5 V 9.5 V 9.5 V "1.0 pA "6.0 "40 nA "100 nA "100 10 µA 5.0 pF 15 Motorola Sensor Device Data 3 MC14578 V+ APPLICATIONS INFORMATION V+ 1 VDD MC14578 2 COMP OUT 3 IN A 16 NC 15 IN + 14 NC R1 V+ R3 R2 R5 6.8 k LOW–BATTERY INDICATOR D2 4 IN B 5 OUT A 6 OUT B 7 IN C 8 OUT C1 13 BUFF OUT * 12 IN 11 Rbias 10 VSS 9 OUT C2 R4 3.9 M V+ D1 HIGH = BATTERY LOW OUTPUT LOW = BATTERY OK * NOTE: IN + and IN have very high input impedance. Interconnect to these pins should be as short as possible. Figure 1. Low–Battery Detector EXAMPLE VALUES Near the switchpoint, the comparator output in the circuit of Figure 1 may chatter or oscillate. This oscillation appears on the signal labelled OUTPUT. In some cases, the oscillation in the transition region will not cause problems. For example, an MPU reading OUTPUT could sample the signal two or three times to ensure a solid level is attained. But, in a low battery detector, this probably is not necessary. To eliminate comparator chatter, hysteresis can be added as shown in Figure 2. The circuit of Figure 2 requires slightly more operating current than the Figure 1 arrangement. R1 470 kΩ 820 kΩ 1.2 MΩ R2 1.3 MΩ 1.2 MΩ 1.2 MΩ R3 20 kΩ 39 kΩ 62 kΩ Nominal Trip Point 4.08 V 5.05 V 6.00 V 12 – 2 + R6 15 R7 Figure 2. Adding Hysteresis 4 Motorola Sensor Device Data –A– 16 1 H G PACKAGE DIMENSIONS 9 B 8 F C L S –T– SEATING PLANE K J M D 16 PL 0.25 (0.010) M T A M CASE 648–08 ISSUE R MC14578 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEADS WHEN FORMED PARALLEL. 4. DIMENSION B DOES NOT INCLUDE MOLD FLASH. 5. ROUNDED CORNERS OPTIONAL. INCHES MILLIMETERS DIM MIN MAX MIN MAX A 0.740 0.770 18.80 19.55 B 0.250 0.270 6.35 6.85 C 0.145 0.175 3.69 4.44 D 0.015 0.021 0.39 0.53 F 0.040 0.70 1.02 1.77 G 0.100 BSC 2.54 BSC H 0.050 BSC 1.27 BSC J 0.008 0.015 0.21 0.38 K 0.110 0.130 2.80 3.30 L 0.295 0.305 7.50 7.74 M 0_ 10_ 0_ 10 _ S 0.020 0.040 0.51 1.01 STYLE 1: PIN 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. CATHODE CATHODE CATHODE CATHODE CATHODE CATHODE CATHODE CATHODE ANODE ANODE ANODE ANODE ANODE ANODE ANODE ANODE STYLE 2: PIN 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. COMMON DRAIN COMMON DRAIN COMMON DRAIN COMMON DRAIN COMMON DRAIN COMMON DRAIN COMMON DRAIN COMMON DRAIN GATE SOURCE GATE SOURCE GATE SOURCE GATE SOURCE Motorola Sensor Device Data 5 MC14578 NOTES 6 Motorola Sensor Device Data NOTES MC14578 Motorola Sensor Device Data 7 MC14578 Mfax is a trademark of Motorola, Inc. Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer. How to reach us: USA/EUROPE/Locations Not Listed: Motorola Literature Distribution; P.O. Box 5405, Denver, Colorado 80217. 1–303–675–2140 or 1–800–441–2447 JAPAN: Motorola Japan Ltd.; SPS, Technical Information Center, 3–20–1, Minami–Azabu. Minato–ku, Tokyo 106–8573 Japan. 81–3–3440–3569 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Centre, 2 Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong. 852–26668334 Customer Focus Center: 1–800–521–6274 Mfax™: RMFAX0@email.sps.mot.com – TOUCHTONE 1–602–244–6609 Motorola Fax Back System – US & Canada ONLY 1–800–774–1848 – http://sps.motorola.com/mfax/ HOME PAGE: http://motorola.com/sps/ 8 ◊ Motorola Sensor Device Data MC14578/D

Top_arrow
回到顶部
EEWORLD下载中心所有资源均来自网友分享,如有侵权,请发送举报邮件到客服邮箱bbs_service@eeworld.com.cn 或通过站内短信息或QQ:273568022联系管理员 高进,我们会尽快处理。