V3025 EMMICRO [EM Microelectronic - MARIN SA], V3025 Datasheet - Page 3

• Manufacturer Part Number: V3025
• Description: 17Very Low Power 8-Bit 32 kHz RTC Module with Digital Trimming, User RAM and Battery Switch-over
• Manufacturer: EMMICRO [EM Microelectronic - MARIN SA]

Switch-over Electrical Characteristics
T
Timing Characteristics
V
Note 1: t
Note 2: t
Note 3: t
Note 4: t
Note 5: A /D must come before a CS and RD or a CS and WR combination. The user has to guarantee this.
Copyright © 2004, EM Microelectronic-Marin SA
Parameter
ON resistance of V
ON resistance of V
V
switching
V
switching
V
delay to PFO and V
VDD falling edge switching
delay to PFO and V
Parameter
Chip select duration, write cycle
Write pulse duration
Time between two transfers
RAM access time (note 1)
Data valid to Hi-impedance (note
2)
Write data settle time (note 3)
Data hold time (note 4)
Advance write time
Rise time (all inputs)
Fall time (all inputs)
PF response delay
A
CS delay after A /D (note 5)
CS delay to A /D
DD
DD
DD
DD
= -40 to +85°C, inputs to V
= 5.0V ±10%, V
voltage over V
voltage under V
rising edge switching
Typically, t
ACC
DF
DW
DH
starts from RD ( DS ) or CS , whichever deactivates first
starts from WR (R/ W ) or CS , whichever deactivates first
ends at WR (R/ W ) or CS , whichever deactivates first
starts from RD ( DS ) or CS , whichever activates last
R
ACC
BAT
DD
BAT
BAT
BAT
OUT
OUT
to V
for
= 0V, V
to V
= 5 + 0.9 C
for
OUT
OUT
DD
SS
, outputs not connected, unless otherwise specified
= 0V and T
EXT
Symbol
V
V
R
R
T
T
SVDD
SBAT
RDD
in ns; where C
VDD
FDD
BAT
Symbol
t A
t A
t
t
t
t
t
ADW
t
ACC
t
t
WR
t
DW
t
CS
DF
DH
t
PF
W
R
F
/Ds
/Dt
A
= -40 to +85°C
Test Conditions
V
V
V
V
V
V
2.8V
DD
DD
BAT
BAT
BAT
BAT
Test Conditions
C
= 3V, V
= 0V, V
= 3V, V
= 3V, V
= 3V, V
= 3V, V
LOAD
EXT
(external parasitic capacitance) is in pF
= 50pF
BAT
BAT
OUT
OUT
DD
DD
= 0V, I
= 3V, I
rise from 2.8V to 3.5V
falling from 3.5V to
open
open
3
OUT
OUT
= 100mA
= 20mA
3.00
2.98
Min
Min
100
50
50
10
50
10
10
10
5
3.21
3.08
Typ
Typ
www.emmicroelectronic.com
24
14
50
30
4
8
V3025
Max
3.45
3.18
Max
100
200
200
100
40
60
60
40
8
Unit
Unit
Table 4
Table 4
µs
µs
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Ω
Ω
V
V