Rainbow Electronics DS1603 - Manual (Page 8)

DS1603
8 of 9
AC ELECTRICAL CHARACTERISTICS (V
CC
= +5V ±10%; 0°C to +70°C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Data to CLK Setup t
DC
50 ns 6
CLK to Data Hold t
CDH
60 ns 6
CLK to Data Delay t
CDD
200 ns 6, 7, 8
CLK Low Time t
CL
250 ns 6
CLK High Time t
CH
250 ns 6
CLK Frequency f
CLK
DC 2.0 MHz 6
CLK Rise and Fall t
F,
t
R
500 ns
RST to CLK Setup
t
CC
100 ns 6
CLK to RST Hold t
CCH
60 ns 6
RST Inactive Time
t
CWH
1 µs 6
RST Low to I/O High-Z
t
RDZ
70 ns 6
CLK High to I/O High- Z t
CDZ
20 ns 6
(T
A
= +25°C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Expected Data
Retention Time
t
DR
10 years 10
NOTES:
1) All voltages are referenced to ground.
2) Logic 1 voltages are specified at a source current of 1mA.
3) Logic 0 voltages are specified at a sink current of 4mA.
4) I
CC
is specified with the DQ pin open.
5) I
CC1
is specified with V
CC
at 5.0V and RST = GND.
6) Measured at V
IH
= 2.0V or V
IL
= 0.8V.
7) Measured at V
OH
= 2.4V or V
OL
- 0.4V.
8) Load capacitance = 50pF.
9) Battery trip point is the point at which the V
CC
powered counter and the serial port stops operation.
The battery trip point drops below the minimum once the internal lithium energy cell is exhausted.
10) The expected t
DR
is defined as accumulative time in the absence of V
CC
with the clock oscillator
running.
11) Real-time clock modules can be successfully processed through conventional 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.