DS1631 Datasheet, PDF (9/19 Pages) National Semiconductor (TI) – CMOS Dual Peripheral Drivers

DC ELECTRICAL CHARACTERISTICS
PARAMETER
Input Leakage Current
I/O Leakage Current
CE ³ V_IH ≤ V_CC
Output Current at 2.4V
Output Current at 0.4V
Standby Current CE = 2.2V
Standby Current
CE = V_CC - 0.5V
Operating Current t_CYC = 70ns
Write Protection Voltage
Battery Switchover Voltage
SYMBOL
I_IL
I_IO
I_OH
I_OL
I_CCS1
I_CCS2
I_CC01
V_PF
V_SO
MIN
-1.0
-1.0
-1.0
2.0
2.80
DS1244/DS1244P
Over the operating range (3.3V)
TYP
MAX UNITS NOTES
+1.0
mA
12
+1.0
mA
mA
mA
5
7
mA
2.0
3.0
mA
50
mA
2.86
2.97
V
11
V_BAT or V_PF
V
11
CAPACITANCE
PARAMETER
Input Capacitance
Input/Output Capacitance
SYMBOL
C_IN
C_I/O
MIN
TYP
5
5
MAX
10
10
(T_A = +25°C)
UNITS NOTES
pF
pF
MEMORY AC ELECTRICAL CHARACTERISTICS Over the operating range (5V)
PARAMETER
Read Cycle Time
Access Time
OE to Output Valid
CE to Output Valid
OE or CE to Output Active
Output High-Z from Deselection
Output Hold from Address Change
Write Cycle Time
Write Pulse Width
Address Setup Time
Write Recovery Time
Output High-Z from WE
Output Active from WE
Data Setup Time
Data Hold Time from WE
SYMBOL
t_RC
t_ACC
t_OE
t_CO
t_COE
t_OD
t_OH
t_WC
t_WP
t_AW
t_WR
t_ODW
t_OEW
t_DS
t_DH
DS1244Y-70
MIN
MAX
70
70
35
70
5
25
5
70
50
0
0
25
5
30
5
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
NOTES
5
5
3
5
5
4
4
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