Datasheet

DS1743/DS1743P Y2K-Compliant, Nonvolatile Timekeeping RAMs
12 of 17
AC CHARACTERISTICS—WRITE CYCLE (5V)
(V
CC
= 5.0V ±10%, T
A
= Over the Operating Range.)
PARAMETER SYMBOL
ACCESS
UNITS NOTES
70ns 85ns 100ns
MIN MAX MIN MAX MIN MAX
Write Cycle Time t
WC
70 85 100 ns
Address Setup Time t
AS
0 0 0 ns 5
WE Pulse Width
t
WEW
50 65 70 ns
CE Pulse Width
t
CEW
60 70 75 ns 5
CE2 Pulse Width t
CE2W
65 75 85 ns 5
Data Setup Time t
DS
30 35 40 ns 5
Data Hold Time CE
t
DH
0 0 0 ns 5
Data Hold Time CE2 t
DH
8 8 8 ns 5
Address Hold Time t
AH
5 5 5 ns 5
WE Data-Off Time
t
WEZ
25 30 35 ns
Write Recovery Time t
WR
10 10 10 ns
AC CHARACTERISTICS—WRITE CYCLE (3.3V)
(V
CC
= 3.3V ±10%, T
A
= Over the Operating Range.)
PARAMETER SYMBOL
ACCESS
UNITS NOTES
120ns
150ns
MIN MAX MIN MAX
Write Cycle Time t
WC
120 150 ns
Address Setup Time t
AS
0 0 ns 5
WE Pulse Width
t
WEW
100 130 ns
CE and CE2 Pulse Width
t
CEW
110 140 ns 5
Data Setup Time t
DS
80 90 ns 5
Data Hold Time CE
t
DH
0 0 ns 5
Data Hold Time CE2 t
DH
10 10 ns 5
Address Hold Time t
AH
0 0 ns 5
WE Data-Off Time
t
WEZ
40 50 ns
Write Recovery Time t
WR
10 10 ns