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MC1455 датащи(PDF) 1 Page - ON Semiconductor |
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MC1455 датащи(HTML) 1 Page - ON Semiconductor |
1 / 10 page © Semiconductor Components Industries, LLC, 2004 March, 2004 − Rev. 8 1 Publication Order Number: MC1455/D MC1455, MC1455B, NCV1455B Timers The MC1455 monolithic timing circuit is a highly stable controller capable of producing accurate time delays or oscillation. Additional terminals are provided for triggering or resetting if desired. In the time delay mode, time is precisely controlled by one external resistor and capacitor. For astable operation as an oscillator, the free−running frequency and the duty cycle are both accurately controlled with two external resistors and one capacitor. The circuit may be triggered and reset on falling waveforms, and the output structure can source or sink up to 200 mA or drive MTTL circuits. • Direct Replacement for NE555 Timers • Timing from Microseconds through Hours • Operates in Both Astable and Monostable Modes • Adjustable Duty Cycle • High Current Output Can Source or Sink 200 mA • Output Can Drive MTTL • Temperature Stability of 0.005% per °C • Normally ON or Normally OFF Output http://onsemi.com P1 SUFFIX PLASTIC PACKAGE CASE 626 1 8 D SUFFIX PLASTIC PACKAGE CASE 751 8 1 MARKING DIAGRAMS XXXXXXXXX AWL YYWW XXXXXX ALYW 1 8 See detailed ordering and shipping information in the package dimensions section on page ___ of this data sheet. ORDERING INFORMATION (Create − Named − OrderingInfoText.) xx = Specific Device Code A = Assembly Location WL, L = Wafer Lot YY, Y = Year WW, W = Work Week Figure 1. 22 Second Solid State Time Delay Relay Circuit Figure 2. Representative Block Diagram Figure 3. General Test Circuit 1.0 k Load MT2 10 k 0.1 mF 0.01 mF 1 5 2 4 38 6 7 1.0 mF C 20M G MT1 −10 V 1N4003 1N4740 3.5 k 250 V − + t = 1.1; R and C = 22 sec Time delay (t) is variable by changing R and C (see Figure 16). 10 mF VCC Threshold Control Voltage Trigger 6 5 2 5 k 8 5 k 5 k + − Comp A + − Comp B 1 Gnd Reset 4 R S Flip Flop Q Inhibit/ Reset 7 3 Discharge Output R MC1455 VR Reset 4 8 ICC VCC 700 Discharge 6 Threshold 7 Ith 2.0 k VS Trigger 2 Gnd 1 3 ISink ISource VO 0.01 mF + 5 Control Voltage Output VCC MC1455 Test circuit for measuring DC parameters (to set output and measure parameters): a) When VS w 2/3 VCC, VO is low. b) When VS v 1/3 VCC, VO is high. c) When VO is low, Pin 7 sinks current. To test for Reset, set VO c) high, apply Reset voltage, and test for current flowing into Pin 7. c) When Reset is not in use, it should be tied to VCC. |
Аналогичный номер детали - MC1455 |
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Аналогичное описание - MC1455 |
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