OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

DS1553WP-120+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
DS1553 64kB, Nonvolatile, Year-2000-Compliant Timekeeping RAM
16 of 20
POWER-UP/DOWN CHARACTERISTICS
(V
CC
= 5.0V ±10%, T
A
= Over the operating range.)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
CE or WE at V
IH
, Before Power-Down
t
PD
0
s
V
CC
Fall Time: V
PF(MAX)
to V
PF(MIN)
t
F
300
s
V
CC
Fall Time: V
PF(MIN)
to V
SO
t
FB
10
s
V
CC
Rise Time: V
PF(MIN)
to V
PF(MAX)
t
R
0
s
V
PF
to RST High
t
REC
40 200 ms
Expected Data Retention Time
(Oscillator On)
t
DR
10 years 6, 7
Figure 8. Power-Up/Down Waveform Timing 5V Device
DS1553 64kB, Nonvolatile, Year-2000-Compliant Timekeeping RAM
17 of 20
POWER-UP/DOWN CHARACTERISTICS
(V
CC
= 3.3V ±10%, T
A
= Over the operating range.)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
CE or WE at V
IH
, Before Power-Down
t
PD
0
s
V
CC
Fall Time: V
PF(MAX)
to V
PF(MIN)
t
F
300
s
V
CC
Rise Time: V
PF(MIN)
to V
PF(MAX)
t
R
0
s
V
PF
to RST High
t
REC
40 200 ms
Expected Data Retention Time
(Oscillator On)
t
DR
10 years 6, 7
Figure 9. Power-Up/Down Waveform Timing 3.3V Device
CAPACITANCE
(T
A
= +25°C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Capacitance on All Input Pins C
IN
7 pF 1
Capacitance on IRQ/FT, RST, and
DQ Pins
C
IO
10 pF 1
DS1553 64kB, Nonvolatile, Year-2000-Compliant Timekeeping RAM
18 of 20
AC TEST CONDITIONS
Output Load: 100 pF + 1TTL Gate
Input Pulse Levels: 0 to 3.0V
Timing Measurement Reference Levels:
Input: 1.5V
Output: 1.5V
Input Pulse Rise and Fall Times: 5ns
NOTES:
1) Voltage referenced to ground.
2) Typical values are at +25C and nominal supplies.
3) Outputs are open.
4) Battery switch over occurs at the lower of either the battery voltage or V
PF
.
5) The
IRQ /FT and RST outputs are open drain.
6) Data retention time is at +25C.
7) Each DS1553 has a built-in switch that disconnects the lithium source until V
CC
is first applied by the
user. The expected t
DR
is defined for DIP modules as a cumulative time in the absence of V
CC
starting
from the time power is first applied by the user.
8) Real-time clock modules (DIP) can be successfully processed through conventional wave-soldering
techniques as long as temperature exposure to the lithium energy source contained within does not
exceed +85C. Post solder cleaning with water-washing techniques is acceptable, provided that
ultrasonic vibration is not used.
In addition, for the PowerCap:
a. Maxim recommends that PowerCap Module bases experience one pass through solder reflow
oriented with the label side up (“live-bug”).
b. Hand soldering and touch-up: Do not touch or apply the soldering iron to leads for more than
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.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

DS1553WP-120+

Mfr. #:
Buy DS1553WP-120+
Manufacturer:
Description:
Real Time Clock 64kB NV RAM Timekeepe
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet