DS17287 Maxim, DS17287 Datasheet - Page 4

• Manufacturer Part Number: DS17287
• Description: The DS17285, DS17485, DS17885, DS17287, DS17487, and DS17887 real-time clocks (RTCs) are designed to be successors to the industry-standard DS12885 and DS12887
• Manufacturer: Maxim

Real-Time Clocks
AC ELECTRICAL CHARACTERISTICS
(V
4
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
CC
_____________________________________________________________________
= +2.7V to +3.7V, T
AD0–AD7
WRITE
PARAMETER
WR
AS
RD
CS
A
= Over the operating range, unless otherwise noted.) (Note 2)
t
t
ASD
ASD
SYMBOL
t
PW
PW
ASL
PW
t
t
t
t
t
t
t
t
t
ASED
t
DHW
DSW
t
R
t
DHR
DDR
CYC
t
AHL
ASD
ASL
IRD
PW
CH
CS
RWH
RWL
, t
ASH
ASH
F
PW
RWH
(Note 8)
t
CS
t
ASED
t
AHL
CONDITIONS
t
CYC
PW
t
DSW
RWL
MIN
360
200
150
20
10
40
10
30
40
30
20
70
0
0
TYP
Write Timing
t
t
CH
DHW
MAX
200
DC
30
90
2
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs