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Epson SCI 7660 SERIES User Manual

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   Summary of Contents for Epson SCI 7660 SERIES

  • Page 2: Block Diagram

    Resistor connection. Open when using external clock OSC1 Resistor connection. Clock input when using external clock Positive supply (system V CAP1+ Positive charge-pump connection CAP1– Negative charge-pump connection ×2 multiplier output Negative supply (system ground) EPSON 1–1 SCI7000 Series Technical Manual...

  • Page 3: Specifications

    –2.2V) is shown in the following figure. Note that diode D1 should have a maximum forward voltage of 0.6V with 1.0mA forward current. 2. R min can be varied depending on the input voltage. EPSON 1–2 SCI7000 Series Technical Manual...

  • Page 4

    Clock frequency = 1MΩ, V = –5V Ω Output impedance = 10mA, V = –5V — Multiplication efficiency Peff = 5mA, V = –5V — µA OSC1 Input leakage current = –8V — — EPSON 1–3 SCI7000 Series Technical Manual...

  • Page 5

    Clock frequency vs. Ambient temperature = 40kHz Ta = 25 = –5.0V Ta = 25°C –5 20kHz 10kHz –10 –15 –7 –6 –5 –4 –3 –2 –1 [mA] Multiplier current vs. Input voltage Output voltage vs. Output current EPSON 1–4 SCI7000 Series Technical Manual...

  • Page 6

    Ta = 25°C Ta = 25°C = 7mA = 10mA –7 –6 –5 –4 –3 –2 –1 –7 –6 –5 –4 –3 –2 –1 Output impedance vs. Input voltage Output impedance vs. Input voltage EPSON 1–5 SCI7000 Series Technical Manual...

  • Page 7

    Multiplication efficiency vs. Clock frequency Multiplication efficiency vs. Clock frequency Ta = 25°C Ta = 25°C = –5.0V = –3.0V Peff Peff [mA] [mA] Multiplication efficiency/input current vs. Multiplication efficiency/input current vs. Output current Output current EPSON 1–6 SCI7000 Series Technical Manual...

  • Page 8: Functional Description

    = 0 V = –5 V OSC1 OSC1 External clock signal OSC2 OSC2 10µF = –10V (2V 1MΩ 10µF Doubled potential levels = 0 V (+5V) = –5 V (–5V) = (2V ) = –10 V EPSON 1–7 SCI7000 Series Technical Manual...

  • Page 9: Typical Applications

    ' = V = –5 10µF 10µF 1MΩ 1MΩ 10µF 10µF = –10 V = V ' = –15 V Potential levels (0 V) (–5 V) (–10 V) (–15 V) Primary stage Secondary stage EPSON 1–8 SCI7000 Series Technical Manual...

  • Page 10

    –10 and 3.8 V outputs = 3.8 V from a single input. = 0 V = –5 V = 0 V = –10 V = –5 V = 3.8 V 10µF 10µF = –10 V 1MΩ 10µF 10µF EPSON 1–9 SCI7000 Series Technical Manual...

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