DS17285_1 Datasheet, PDF (3/31 Pages) Maxim Integrated Products – Real-Time Clocks

Real-Time Clocks
DC ELECTRICAL CHARACTERISTICS
(V_CC = 0V, V_BAT = 3.0V, T_A = Over the operating range, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
V_BAT or V_BAUX Current (Oscillator
On); T_A = +25°C, V_BAT = 3.0V
V_BAT or V_BAUX Current
(Oscillator Off)
I_BAT
I_BATDR
(Note 7)
(Note 7)
TYP MAX UNITS
500 700
nA
50
400
nA
AC ELECTRICAL CHARACTERISTICS
(V_CC = +4.5V to +5.5V, T_A = Over the operating range, unless otherwise noted.) (Note 2)
PARAMETER
Cycle Time
Pulse Width, RD or WR Low
Pulse Width, RD or WR High
Input Rise and Fall
Chip-Select Setup Time Before
RD or WR
Chip-Select Hold Time
Read-Data Hold Time
Write-Data Hold Time
Address Setup Time to ALE Fall
Address Hold Time to ALE Fall
RD or WR High Setup to ALE
Rise
Pulse Width ALE High
Delay Time ALE Low to RD Low
Output Data Delay Time from RD
Data Setup Time
IRQ Release from RD
SYMBOL
t_CYC
PW_RWL
PW_RWH
t_R, t_F
t_CS
t_CH
t_DHR
t_DHW
t_ASL
t_AHL
t_ASD
PW_ASH
t_ASED
t_DDR
t_DSW
t_IRD
(Note 8)
CONDITIONS
MIN TYP MAX UNITS
240
DC
ns
120
ns
80
ns
30
ns
20
ns
0
ns
10
50
ns
0
ns
20
ns
10
ns
25
ns
40
ns
30
ns
20
120
ns
30
ns
2
µs
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