Rainbow Electronics DS1243Y - Manual (Page 7)

DS1243Y
7 of 13
MEMORY AC ELECTRICAL
CHARACTERISTICS (0
°
C to 70
°
C; V
CC
= 5.0V
±
10%)
DS1243Y-120 DS1243Y-150 DS1243Y
PARAMETER SYMBOL MIN MAX MIN MAX MIN MAX UNITS NOTES
Read Cycle Time t
RC
120 150 200 ns
Access Time t
ACC
120 150 200 ns
OE to Output Valid
t
OE
60 70 100 ns
CE to Output Valid
t
CO
120 150 200 ns
OE or CE to
Output Active
t
COE
5 5 5 ns 5
Output High Z from
Deselection t
OD
40 70 100 ns 5
Output Hold from
Address Change t
oH
5 5 5 ns
Write Cycle Time t
WC
120 150 200 ns
Write Pulse Width t
WP
90 100 150 ns 3
Address Setup Time t
AW
0 0 0 ns
Write Recovery
Time t
WR
20 20 20 ns
Output High Z from
WE
t
ODW
40 70 80 ns 5
Output Active from
WE
t
OEW
5 5 5 ns 5
Data Setup Time t
DS
50 60 80 ns 4
Data Hold Time
from WE
t
DH
20 20 20 ns 4
AC TEST CONDITIONS
Output Load: 50 pF + 1TTL Gate
Input Pulse Levels: 0–3V
Timing Measurement Reference Levels
Input:
1.5V
Output: 1.5V
Input Pulse Rise and Fall Times: 5 ns