DS14285SN+T&R Maxim Integrated, DS14285SN+T&R Datasheet - Page 23

• Manufacturer Part Number: DS14285SN+T&R
• Description: Real Time Clock
• Manufacturer: Maxim Integrated
• Series: DS14285, DS14287r

Specifications of DS14285SN+T&R

• Rohs: yes
• Function: Clock, Calendar, NV SRAM Control
• Rtc Bus Interface: Multiplexed
• Date Format: DW
• Time Format: HH
• Rtc Memory Size: 114 B
• Supply Voltage - Max: 5.5 V
• Supply Voltage - Min: 4.5 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Package / Case: SOIC-24

NOTES:
1) All voltages are referenced to ground.
2) All outputs are open.
3) The MOT pin has an internal pulldown of 20kΩ.
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 V
power switching circuit turns the lithium energy source on to maintain the clock and timer data
functionality.
1µA at +25°C.
4mA 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
IRQ
= 100mA, V
= 100µA, V
pin has an internal pullup of 50kΩ.
pin is open drain. The interrupt and the internal clock continue to run regardless of the level
CC
CC
< V
> V
BAT
BAT
CE
.
.
.
IRQ
pin, and the SQW pin when each is in the high impedance
CC
+ 0.3V. As VCC falls below approximately 3.0 volts, a
23 of 26
CCI
and less than