DS1643-100+ Dallas Semiconductor, DS1643-100+ Datasheet - Page 12

• Manufacturer Part Number: DS1643-100+
• Description: Clock, Real Time; DIP; 28 Pins; 5 V (Typ.); 5.3 V (Max.); 0.8 V (Max.); 32.768
• Manufacturer: Dallas Semiconductor

Specifications of DS1643-100+

• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

AC TEST CONDITIONS
Output Load: 100pF + 1TTL Gate
Input Pulse Levels: 0 to 3.0V
Timing Measurement Reference Levels:
Input Pulse Rise and Fall Times: 5ns
NOTES:
1) Voltages are referenced to ground.
2) Typical values are at +25°C and nominal supplies.
3) Outputs are open.
4) The CE2 control signal functions exactly the same as the
5) Data retention time is at 25°C.
6) Each DS1643 has a built-in switch that disconnects the lithium source until V
7) Real-Time Clock Modules (DIP) can be successfully processed through conventional wave-soldering
active and inactive levels are opposite.
user. The expected t
from the time power is first applied by the user.
techniques as long as temperatures as long as temperature exposure to the lithium energy source
contained within does not exceed +85°C. Post-solder cleaning with water washing techniques is
acceptable, provided that ultrasonic vibration is not used.
In addition, for the PowerCap:
Input: 1.5V
Output: 1.5V
a. Dallas Semiconductor recommends that PowerCap Module bases experience one pass through
b. Hand soldering and touch-up: Do not touch or apply the soldering iron to leads for more than
solder reflow oriented with the label side up (“live-bug”).
3 seconds. To solder, apply flux to the pad, heat the lead frame pad and apply solder. To
remove the part, apply flux, heat the lead frame pad until the solder reflow and use a solder
wick to remove solder.
DR
is defined for DIP modules as a cumulative time in the absence of V
12 of 16
CE
signal except that the logic levels for
CC
is first applied by the
CC
starting