Please note that JavaScript and style sheet are used in this website,
Due to unadaptability of the style sheet with the browser used in your computer, pages may not look as original.
Even in such a case, however, the contents can be used safely.
µPD5556
Timer IC
Timer Circuit
Overview
The µPD5556 is a dual circuit version of the µPD5555 timer IC. Being a CMOS circuit, the µPD5556 circuit requires only a little current, and outperforms the bipolar version in characteristics such as operating voltage, reset pin function, input current, and oscillation frequency. Moreover, its circuit configuration is highly immune to chattering, so it is best suited for applications such as a one-shot multivibrator and pulse generator.
Features
- Supply voltage: 3 to 16 V
- Circuit current (VDD = 5 V): 150 µA (TYP.)
- Output saturation voltage (ISINK = 3.2 mA): 0.14 V (TYP.)
- Requires only a small power supply bypass capacitance because of only a little switching noise occurring
0.047 µF for VDD < 10 V
0.1 µF for VDD ≥ 10 V - No intrference occurs even if two or more units of this model are connected to the same power supply line.
- Setting the reset pin to a low level stops oscillation, thus clamping the output to a low level.
- Can drive both CMOS and TTL circuits.
- Sufficient provision to prevent electrostatic breakdown.
Ordering Information
|
Equivalent Circuit (1/2 Circuit)
© 1995-2008 NEC Electronics Corporation
