RTC4573 Epson Company, RTC4573 Datasheet - Page 11

• Manufacturer Part Number: RTC4573
• Description: Serial RTC with Alarm and Timer
• Manufacturer: Epson Company

n
( 1 ) Notes on handling
1. Static electricity
2. Electronic noise
3. Electric potential of I/O pins
4. Treatment of unused input pins
In order to attain low power consumption, this module incorporates a CMOS IC. Therefore, the following points
should be kept in mind when using this module.
While this module does have built-in circuitry designed to protect it against damage from electrostatic discharge, the
module could still be damaged by an extremely large electrostatic discharge. Therefore, packing materials and
shipping containers should be made of conductive materials.Furthermore, use soldering equipment, test circuits, etc.,
that do not have high-voltage leakage, and ground such equipment when working with it.
If excessive external noise is applied to the power supply and
I/O pins, the module may operate incorrectly or may even be
damaged as a result of the latch-up phenomenon.
In order to assure stable operation, connect a passthrough
capacitor (ceramic is recommended) of at least 0.1 m F located as
closely as possible to the power supply pins on this module
(between V
that generates high noise levels near this module.Keep signal
lines away from the shaded areas shown in the figure at right,
and fill the area with a GND pattern, if possible.
Because having the electric potential of the input pins at an intermediate level contributes to increased power
consumption, reduced noise margin, and degradation of the device, keep the electric potential as close as possible
to the electric potential of V
Because the input impedance of the input pins is extremely high and using the module with these pins open can
result in unstable electric potential and misoperation due to noise, unused input pins must always be connected to a
pull-up or pull-down resistor.
Notes on Use
DD
and GND). Furthermore, do not place a device
DD
or GND.
Page-11
Aug.1998