Rainbow Electronics DS1340 - Manual (Page 2)

DS1340
2-Wire RTC with Trickle Charger
2 _____________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Voltage Range on V CC Pin Relative to Ground .....-0.3V to +6.0V
Voltage Range on SDA, SCL, and FT/OUT
Relative to Ground..................................-0.3V to (V CC + 0.3V)
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-55°C to +125°C
Soldering Temperature Range ..................................See JEDEC
J-STD-020A Specification
AC ELECTRICAL CHARACTERISTICS
(V
CC
= V
CC MIN
to V
CC MAX
, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 1, Figure 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Standard mode 0 100
SCL Clock Frequency f SCL
Fast mode 100 400
kHz
Standard mode 4.7 Bus Free Time Between STOP
and START Conditions
t BUF
Fast mode 1.3
µs
Standard mode 4.0 Hold Time (Repeated) START
Condition (Note 2)
t HD:STA
Fast mode 0.6
µs
Standard mode 4.7
Low Period of SCL Clock t LOW
Fast mode 1.3
µs
Standard mode 4.0
High Period of SCL Clock t
HIGH
Fast mode 0.6
µs
Standard mode 0 0.9
Data Hold Time (Notes 3, 4) t HD:DAT
Fast mode 0 0.9
µs
Standard mode 250
Data Setup Time (Note 5) t SU:DAT
Fast mode 100
ns
Standard mode 4.7
START Setup Time t SU:STA
Fast mode 0.6
µs
Standard mode 20 + 0.1C B 1000 Rise Time of SDA and SCL
Signals (Note 6)
t
R
Fast mode 20 + 0.1C B 300
ns
Standard mode 20 + 0.1C
B
300 Fall Time of SDA and SCL Signals
(Note 6)
t F
Fast mode 20 + 0.1C B 300
ns
Standard mode 4.7
Setup Time for STOP Condition t SU:STO
Fast mode 0.6
µs
Capacitive Load for Each Bus
Line
C B (Note 6) 400 pF
Pulse Width of Spikes that Must
be Suppressed by the Input Filter
t SP Fast mode 30 ns
Oscillator Stop Flag (OSF) Delay t OSF (Note 7) 100 ms