DS17285_1 Datasheet, PDF (4/31 Pages) Maxim Integrated Products – Real-Time Clocks

Real-Time Clocks
AC ELECTRICAL CHARACTERISTICS
(V_CC = +2.7V to +3.7V, 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
360
DC
ns
200
ns
150
ns
30
ns
20
ns
0
ns
10
90
ns
0
ns
40
ns
10
ns
30
ns
40
ns
30
ns
20
200
ns
70
ns
2
µs
Write Timing
t_CYC
AS
PW_ASH
t_ASD
RD
t_ASD
t_ASED
WR
CS
AD0–AD7
WRITE
PW_RWH
t_ASL
t_CS
t_AHL
PW_RWL
t_DSW
t_CH
t_DHW
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