Datasheet

DS1747/DS1747P Y2K-Compliant, Nonvolatile Timekeeping RAMs
9 of 16
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 3.3V ±10%, T
A
= Over the Operating Range.)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Active Supply Current Icc 30 mA 2, 3, 10
TTL Standby Current
(
CE
= V
IH
)
Icc
1
2 mA 2, 3
CMOS Standby Current
(
CE
≥ V
CC
- 0.2V)
Icc
2
2 mA 2, 3
Input Leakage Current
(Any Input)
I
IL
-1 +1
µA
Output Leakage Current
(Any Output)
I
OL
-1 +1
µA
Output Logic 1 Voltage
(I
OUT
= -1.0mA)
V
OH
2.4 1
Output Logic 0 Voltage
(I
OUT
= +2.1mA)
V
OL
0.4 1
Write Protection Voltage V
PF
2.80 2.97 V 1
Battery Switchover Voltage V
SO
V
BAT
or
V
PF
V 1, 4
AC CHARACTERISTICS—READ CYCLE (5V)
(V
CC
= 5.0V ±10%, T
A
= Over the Operating Range.)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Read Cycle Time
t
RC
70 ns
Address Access Time
t
AA
70 ns
CE
to DQ Low-Z
t
CEL
5 ns
CE
Access Time
t
CEA
70 ns
CE
Data Off Time
t
CEZ
25 ns
OE
to DQ Low-Z
t
OEL
5 ns
OE
Access Time
t
OEA
35 ns
OE
Data Off Time
t
OEZ
25 ns
Output Hold from Address
t
OH
5 ns