DS1553 Datasheet, PDF (11/19 Pages) Maxim Integrated Products – 64kB, Nonvolatile, Year-2000-Compliant Timekeeping RAM

DS1553 64kB, Nonvolatile, Year-2000-Compliant Timekeeping RAM
READ CYCLE, AC CHARACTERISTICS
(V_CC = 5.0V ±10%, over the operating range.)
PARAMETER
SYMBOL
Read Cycle Time
t_RC
Address Access Time
t_AA
CE to DQ Low-Z
t_CEL
CE Access Time
t_CEA
CE Data Off Time
t_CEZ
OE to DQ Low-Z
t_OEL
OE Access Time
t_OEA
OE Data Off Time
t_OEZ
Output Hold from Address
t_OH
70ns ACCESS
MIN MAX
70
70
5
70
25
5
35
25
5
100ns ACCESS
MIN MAX
100
100
5
100
35
5
55
35
5
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
NOTES
READ CYCLE, AC CHARACTERISTICS
(V_CC = 3.3V ±10%, over the operating range.)
PARAMETER
SYMBOL
Read Cycle Time
t_RC
Address Access Time
t_AA
CE to DQ Low-Z
t_CEL
CE Access Time
t_CEA
CE Data Off Time
t_CEZ
OE to DQ Low-Z
t_OEL
OE Access Time
t_OEA
OE Data Off Time
t_OEZ
Output Hold from Address
t_OH
120ns ACCESS
MIN MAX
120
120
5
120
40
5
100
35
5
150ns ACCESS
MIN MAX
150
150
5
150
50
5
130
35
5
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
NOTES
WRITE CYCLE, AC CHARACTERISTICS
(V_CC = 5.0V ±10%, over the operating range.)
PARAMETER
SYMBOL
70ns ACCESS
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
Address Hold Time
WE Data Off Time
Write Recovery Time
t_DH
t_AH
t_WEZ
t_WR
0
5
25
5
100ns ACCESS
MIN MAX
100
0
70
75
40
0
5
35
5
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
NOTES
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