DS1746_10 Datasheet, PDF (9/16 Pages) Maxim Integrated Products – Y2K-Compliant, Nonvolatile Timekeeping RAMs

DS1746/DS1746P Y2K-Compliant, Nonvolatile Timekeeping RAMs
DC ELECTRICAL CHARACTERISTICS
(V_CC = 3.3V 10%, T_A = Over the Operating Range.)
PARAMETER
SYMBOL MIN
Active Supply Current
Icc
TTL Standby Current
( CE = V_IH)
Icc₁
CMOS Standby Current
( CE V_CC-0.2V)
Icc₂
Input Leakage Current (any input)
I_IL
-1
Output Leakage Current
(any output)
I_OL
-1
Output Logic 1 Voltage
(I_OUT = -1.0 mA)
V_OH
2.4
TYP
MAX
30
UNITS NOTES
mA 2, 3, 10
2
mA
2, 3
2
mA
2, 3
+1
A
+1
A
1
Output Logic 0 Voltage
(I_OUT = +2.1 mA)
V_OL
0.4
1
Write Protection Voltage
Battery Switchover Voltage
V_PF
2.80
2.97
V
1
V_BAT
V_SO
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
Read Cycle Time
t_RC
70
Address Access Time
t_AA
CE to DQ Low-Z
t_CEL
5
CE Access Time
t_CEA
CE Data Off Time
OE to DQ Low-Z
OE Access Time
OE Data Off Time
t_CEZ
t_OEL
5
t_OEA
t_OEZ
Output Hold from Address
t_OH
5
TYP
MAX
70
70
25
35
25
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
NOTES
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