zsct1555 Zetex Semiconductors plc., zsct1555 Datasheet
zsct1555
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zsct1555 Summary of contents
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... Whenever the output is forced low then the internal discharge transistor is turned on. FEATURES by internal resistors. APPLICATIONS ZSCT1555 0.9V supply operating voltage guaranteed Pin connections comparable with 555 series timers Very low quiescent current 74 A SO8 and DIL8 packages Operating temperature range ...
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... ZSCT1555 ABSOLUTE MAXIMUM RATINGS Supply Voltage Input Voltages (Cont, Reset, Thres, Trig) Output Current Operating Temperature Storage Temperature ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated):T SYMBOL PARAMETER V Supply Voltage CC I Supply Current CC V Threshold Voltage TH I Threshold Current (Note Trigger Voltage ...
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... Note 1: This will influence the maximum values of RA and RB (RA Note 2: Is defined as the difference between the measured value and the average value of a random sample taken on a batch basis Issue 3 - July 2006 © Zetex Semiconductors plc 2006 ZSCT1555 =25°C,V amb CC CONDITIONS MIN ...
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... ZSCT1555 +100°C 2 +25°C -20° Lowest Voltage Level of Trigger Pulse (xVcc) Minimum Pulse Width Required for Triggering 5 4 +100°C 3 +25°C -20° Lowest Voltage Level of Trigger Pulse (xVcc) Output Propagation Delay 200 160 120 80 -20°C 40 +25° ...
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... Sink Current (mA) Discharge Transistor Voltage v Sink Current Issue 3 - July 2006 © Zetex Semiconductors plc 2006 TYPICAL CHARACTERISTICS 0.1 1.0 -20°C +25°C +100° 100 0.1 1 ZSCT1555 0.5 Vcc=5v 0.4 -20°C +25°C +100°C 0.3 0.2 0.1 0.0 0.001 0.01 0.1 High Level Output Current (mA) Output High Voltage Drop v Output Current 1.0 Vcc=5v 0 ...
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... ZSCT1555 FUNCTIONAL DIAGRAM FUNCTIONAL TABLE RESET TRIGGER VALUE THRESHOLD Low N/A High < High > High > POWER DERATING TABLE Package TA 25°C Power Rating N8 625mW D8 625mW Issue 3 - July 2006 © Zetex Semiconductors plc 2006 VOLTAGE N/A N/A > < Derating Factor T =70°C Power A Above TA=25° ...
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... APPLICATIONS INFORMATION Many configurations of the ZSCT1555 are possible. The following gives a selection of a few of these using the most basic monostable and astable connections. The final application example in astable mode shows the device optimum use for low voltage and power economy in a single cell boost converter. ...
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... ZSCT1555 Figure 5 shows the monostable mode used as a pulse width modulator. Here the trigger pin is supplied with a continuous pulse train, the resulting output pulse width is modulated by a signal applied to the control pin. Figure 5 Figure 6 shows typical waveform examples. Figure 6 Issue 3 - July 2006 © ...
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... PPM, circuit where the pulse position is altered by the control input voltage. Figure 10 Issue 3 - July 2006 © Zetex Semiconductors plc 2006 Figure 11 shows the result of modulation with a triangle wave input to the control pin. 100 1k 100k 10k ZSCT1555 Figure 11 www.zetex.com ...
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... ZSCT1555 The circuit of Figure 12 shows the device in astable mode operating as part of a single cell boost converter. This circuit generates a 5 volt supply from a single battery cell. The circuit output voltage is maintained down to 0.9 volts input and power economy is optimised for extended battery life. ...
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Europe Americas Zetex GmbH Zetex Inc Streitfeldstraße 19 700 Veterans Memorial Highway D-81673 München Hauppauge, NY 11788 Germany USA Telefon: (49 Telephone: (1) 631 360 2222 Fax: (49 Fax: (1) ...