Rainbow Electronics DS1248Y - Manual (Page 6)

DS1248Y
032697 6/12
MEMORY AC ELECTRICAL CHARACTERISTICS (0 ° C to 70 ° C; V
CC
= 5.0V ± 10%)
PARAMETER SYMBOL
DS1248Y–120 DS1248Y–150 DS1248Y–200
UNITS NOTES 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