DS1553 64kB, Nonvolatile, Year-2000-Compliant Timekeeping RAM
DC ELECTRICAL CHARACTERISTICS
(VCC = 3.3V ±10%, over the operating range.)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Active Supply Current
ICC
10
30
mA
2, 3
ICC1
ICC2
IIL
0.7
0.7
2
2
mA
mA
ꢀA
ꢀA
V
2, 3
2, 3
TTL Standby Current (CE = VIH)
CMOS Standby Current
(CE O VCC - 0.2V)
Input Leakage Current (Any Input)
-1
-1
+1
+1
Output Leakage Current (Any Output)
IOL
Output Logic 1 Voltage
(IOUT = -1.0mA)
VOH
VOL1
VOL2
VPF
VSO
2.4
1
1
Output Logic 0 Voltage
0.4
0.4
V
(IOUT = 2.1mA, DQ0–7 Outputs)
V
1, 5
1
(IOUT = 7.0mA, IRQ/FT and RST Outputs)
Write Protection Voltage
2.75
2.97
V
VBAT
Battery Switchover Voltage
V
1, 4
or VPF
Figure 5. Read Cycle Timing Diagram
10 of 19
DALLAS [ DALLAS SEMICONDUCTOR ]
