Rainbow Electronics DS1244Y - Manual (Page 9)

DS1244/DS1244P
9 of 19
DC ELECTRICAL CHARACTERISTICS Over the operating range (3.3V)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Input Leakage Current I
IL
-1.0 +1.0 mA 12
I/O Leakage Current
CE ³ V
IH
≤ V
CC
I
IO
-1.0 +1.0 mA
Output Current at 2.4V I
OH
-1.0 mA
Output Current at 0.4V I
OL
2.0 mA
Standby Current CE = 2.2V I
CCS1
5 7 mA
Standby Current
CE = V
CC
- 0.5V
I
CCS2
2.0 3.0 mA
Operating Current t
CYC
= 70ns I
CC01
50 mA
Write Protection Voltage V
PF
2.80 2.86 2.97 V 11
Battery Switchover Voltage
V
SO
V
BAT
or V
PF
V 11
CAPACITANCE (T
A
= +25°C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Input Capacitance C
IN
5 10 pF
Input/Output Capacitance C
I/O
5 10 pF
MEMORY AC ELECTRICAL CHARACTERISTICS Over the operating range (5V)
DS1244Y-70
PARAMETER SYMBOL
MIN MAX
UNITS NOTES
Read Cycle Time t
RC
70 ns
Access Time t
ACC
70 ns
OE to Output Valid
t
OE
35 ns
CE to Output Valid
t
CO
70 ns
OE or CE to Output Active
t
COE
5 ns 5
Output High-Z from Deselection t
OD
25 ns 5
Output Hold from Address Change t
OH
5 ns
Write Cycle Time t
WC
70 ns
Write Pulse Width t
WP
50 ns 3
Address Setup Time t
AW
0 ns
Write Recovery Time t
WR
0 ns
Output High-Z from WE
t
ODW
25 ns 5
Output Active from WE
t
OEW
5 ns 5
Data Setup Time t
DS
30 ns 4
Data Hold Time from WE
t
DH
5 ns 4