DS1672U-33/T&R Maxim Integrated Products, DS1672U-33/T&R Datasheet - Page 6

• Manufacturer Part Number: DS1672U-33/T&R
• Description: Real Time Clock Low Voltage I2C-Comp atibleTime Keeping C
• Manufacturer: Maxim Integrated Products

POWER-UP/POWER-DOWN CHARACTERISTICS
(T
Note 11: If the EOSC bit in the control register is set to logic 1, t
Warning: Negative undershoots below –0.3V while the part is in battery-backed mode can cause
loss of data.
Figure 1. Timing Diagram
Figure 2. Power-Up/Power-Down Timing
SDA
OUTPUTS
V
V
V
V
SCL
A
CC
CC
CC
CC
INPUTS
= -40C to +85C)
STOP
V
RST
V
Detect to RST (V
Detect to RST (V
Fall Time; V
Rise Time; V
PF(max)
PF(min)
V
t
BUF
CC
t
START
PD
PARAMETER
PF(MAX)
PF(MIN)
RECOGNIZED
VALID
t
t
LOW
HD:STA
CC
CC
to V
to V
Falling)
Rising)
t
F
t
HD:DAT
PF(MIN)
PF(MAX)
t
RPD
t
HIGH
SYMBOL
t
F
t
t
t
SU:DAT
RPD
RPU
t
t
R
F
RPU
6 of 15
is equal to 250ms plus the startup time of the crystal oscillator.
t
SU:STA
MIN
REPEATED
DON'T CARE
HIGH IMPEDANCE
300
START
0
t
HD:STA
TYP
250
MAX
10
UNITS
t
R
ms
µs
s
s
t
SU:STO
RECOGNIZED
t
VALID
RPU
NOTES
11