Rainbow Electronics DS1251Y - Manual (Page 12)

DS1251/DS1251P
12 of 22
MEMORY AC ELECTRICAL CHARACTERISTICS
Over the operating range (3.3V)
DS1251W-120
PARAMETER SYMBOL
MIN MAX
UNITS NOTES
Read Cycle Time t
RC
120 ns
Access Time t
ACC
120 ns
OE to Output Valid t
OE
60 ns
CE to Output Valid t
CO
120 ns
OE or CE to Output Active t
COE
5 ns 5
Output High-Z from Deselection t
OD
40 ns 5
Output Hold from Address Change t
OH
5 ns
Write Cycle Time t
WC
120 ns
Write Pulse Width t
WP
90 ns 3
Address Setup Time t
AW
0 ns
Write Recovery Time t
WR
20 ns 10
Output High-Z from WE
t
ODW
40 ns 5
Output Active from WE
t
OEW
5 ns 5
Data Setup Time t
DS
50 ns 4
Data Hold Time from WE
t
DH
20 ns 4
PHANTOM CLOCK AC ELECTRICAL CHARACTERISTICS
Over the operating range (3.3V)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Read Cycle Time t
RC
120 ns
CE Access Time t
CO
100 ns
OE Access Time t
OE
100 ns
CE to Output Low-Z t
COE
5 ns
OE to Output Low-Z t
OEE
5 ns
CE to Output High-Z t
OD
40 ns 5
OE to Output High-Z t
ODO
40 ns 5
Read Recovery t
RR
20 ns
Write Cycle Time t
WC
120 ns
Write Pulse Width t
WP
100 ns 3
Write Recovery t
WR
20 ns 10
Data Setup Time t
DS
45 ns 4
Data Hold Time t
DH
0 ns 4
CE Pulse Width t
CW
105 ns
RESET Pulse Width t
RST
120 ns