DS1556_10 Datasheet, PDF (13/18 Pages) Maxim Integrated Products – 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM

DS1556 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM
AC CHARACTERISTICS—READ CYCLE
(Over the Operating Range)
PARAMETER
SYMBOL
V_CC = 5.0V 10%
MIN
MAX
Read Cycle Time
t_RC
70
Address Access Time
CE to DQ Low-Z
CE Access Time
CE Data Off Time
OE to DQ Low-Z
OE Access Time
OE Data Off Time
t_AA
70
t_CEL
5
t_CEA
70
t_CEZ
25
t_OEL
5
t_OEA
35
t_OEZ
25
Output Hold from Address
t_OH
5
V_CC = 3.3V 10%
MIN
MAX
120
120
5
120
40
5
100
35
5
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
AC CHARACTERISTICS—WRITE CYCLE
(Over the Operating Range)
PARAMETER
SYMBOL
V_CC = 5.0V 10%
MIN
MAX
Write Cycle Time
t_WC
70
Address Access Time
WE Pulse Width
CE Pulse Width
t_AS
0
t_WEW
50
t_CEW
60
Data Setup Time
t_DS
30
Data Hold Time (Note 9)
t_DH1
5
Data Hold Time (Note 10)
t_DH2
5
Address Hold Time (Note 9)
t_AH1
5
Address Hold Time
(Note 10)
t_AH2
5
WE Data Off Time
t_WEZ
25
Write Recovery Time
t_WR
5
V_CC = 3.3V 10%
MIN
MAX
120
0
100
110
80
5
5
0
5
40
10
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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