DS14285-DS14287 DALLAS [Dallas Semiconductor], DS14285-DS14287 Datasheet - Page 22

• Manufacturer Part Number: DS14285-DS14287
• Description: Real Time Clock with NV RAM Control
• Manufacturer: DALLAS [Dallas Semiconductor]

NOTES:
1. All voltages are referenced to ground.
2. All outputs are open.
3. The MOT pin has an internal pull-down of 20 k .
4. The
5. Applies to the AD0-AD7 pins, the
6. The
7. I
8. I
9. Measured with a load as shown in Figure 5.
10. Expected data retention is based on using an external SRAM with a data retention current of less than
11. Z
12. Real-Time Clock Modules such as the DS14287 can be successfully processed through conventional
state.
of VCC. However, it is important to insure that the pullup resistor used with the interrupt pin is never
pulled up to a value which is greater than VCC + 0.3V. As VCC falls below approximately 3.0 volts,
a power switching circuit turns the lithium energy source on to maintain the clock and timer data
functionality.
1 A at 25 C.
mA is forced through Z
wave-soldering techniques 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.
CCO
CCO
CE
is an average input-to-output impedance as the input is swept from ground to V
CEI
=100 mA, V
=100 A, V
IRQ
pin has an internal pull-up of 50 k .
pin is open drain. The interrupt and the internal clock continue to run regardless of the level
CC
CC
< V
> V
CE
BAT
BAT
.
.
.
IRQ
pin, and the SQW pin when each is in the high impedance
22 of 25
CCI
DS14285/DS14287
and less than 4