d1340-33 Maxim Integrated Products, Inc., d1340-33 Datasheet - Page 4

• Manufacturer Part Number: d1340-33
• Description: Ds1340, Ds1340c I?c Rtc With Trickle Charger
• Manufacturer: Maxim Integrated Products, Inc.

I
POWER-UP/POWER-DOWN CHARACTERISTICS
(T
4
WARNING: Under no circumstances are negative undershoots, of any amplitude, allowed when device is in battery-backup mode.
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Note 7:
Note 8:
Note 9:
Note 10:
Note 11:
Note 12:
Note 13:
Note 14:
Note 15:
Note 16:
Note 17:
Figure 1. Data Transfer on I
Recovery at Power-Up
V
V
V
V
2
A
CC
PF(MIN)
CC
PF(MAX)
= -40°C to +85°C) (Figure 2)
SDA
SCL
C RTC with Trickle Charger
_____________________________________________________________________
Fall Time; V
Rise Time; V
PARAMETER
Limits at -40°C are guaranteed by design and not production tested.
After this period, the first clock pulse is generated.
A device must internally provide a hold time of at least 300ns for the SDA signal (referred to as the V
signal) to bridge the undefined region of the falling edge of SCL.
The maximum t
A fast-mode device can be used in a standard-mode system, but the requirement t
is automatically the case if the device does not stretch the low period of the SCL signal. If such a device does stretch the
low period of the SCL signal, it must output the next data bit to the SDA line t
before the SCL line is released.
C
The parameter t
V
All voltages are referenced to ground.
Measured at V
The use of the 250Ω trickle-charge resistor is not allowed at V
Measured at V
Measured at V
I
Specified with I
Measured with a 32.768kHz crystal attached to the X1 and X2 pins.
Limits at +25°C are guaranteed by design and not production tested.
This delay applies only if the oscillator is enabled and running. If the oscillator is disabled or stopped, no power-up delay
occurs.
STOP
CCA
CCMAX
B
—total capacitance of one bus line in pF.
—SCL clocking at max frequency = 400kHz.
t
BUF
PF(MAX)
PF(MIN)
and 1.3V ≤ V
START
to
to
CC
CC
CC
HD:DAT
2
OSF
2
C bus inactive.
C Serial Bus
= typ, V
= typ, V
= typ, V
t
HD:STA
t
is the period of time the oscillator must be stopped for the OSF flag to be set over the 0V ≤ V
LOW
BAT
only has to be met if the device does not stretch the low period (t
SYMBOL
BACKUP
BACKUP
BACKUP
≤ 3.7V range.
t
t
VCCR
t
VCCF
REC
t
= 0V, register 08h = A5h.
= 0V, register 08h = A6h.
= 0V, register 08h = A7h.
R
t
HD:DAT
(Note 17)
t
F
t
HIGH
t
SU:DAT
CONDITIONS
CC
REPEATED
START
> 3.63V and should not be enabled.
t
SU:STA
t
HD:STA
R MAX
SU:DAT
+ t
SU:DAT
MIN
300
0
LOW
≥ to 250ns must be met. This
) of the SCL signal.
= 1000 + 250 = 1250ns
TYP
t
SP
IH(MIN)
MAX
2
of the SCL
t
SU:STO
CC
UNITS
ms
µs
µs
≤