DS1643-120 DALLAS [Dallas Semiconductor], DS1643-120 Datasheet - Page 7

• Manufacturer Part Number: DS1643-120
• Description: Nonvolatile Timekeeping RAM
• Manufacturer: DALLAS [Dallas Semiconductor]

AC ELECTRICAL CHARACTERISTICS
AC TEST CONDITIONS
Input Levels:
Transition Times:
CAPACITANCE
PARAMETER
PARAMETER
Read Cycle Time
Address Access Time
CE and CE2 Access Time
CE and CE2 Data Off Time
Output Enable Access Time
Output Enable Data Off Time
Output Enable to DQ Low–Z
CE and CE2 to DQ Low–Z
Output Hold from Address
Write Cycle Time
Address Setup Time
CE and CE2 Pulse Width
Address Hold from End of Write
Write Pulse Width
WE Data Off Time
WE or CE Inactive Time
Data Setup Time
Data Hold Time High
PARAMETER
Capacitance on all pins
(except DQ)
Capacitance on DQ pins
0V to 3V
5 ns
SYMBOL
SYMBOL
t
SYMBOL
t
t
t
t
t
t
t
t
t
t
t
t
WEW
t
CEW
t
t
t
WEZ
t
CEA
CEZ
OEA
OEZ
OEL
t
t
DH1
DH2
CEL
AH1
AH2
WC
WR
OH
RC
AA
AS
DS
C
C
DQ
I
MIN
120
120
100
120
30
10
85
15
DS1643–120
5
5
5
0
5
0
MIN
MAX
120
120
100
40
35
40
TYP
MIN
150
150
120
150
110
30
10
15
DS1643–150
5
5
5
0
5
0
(0 C to 70 C; V
MAX
10
7
MAX
150
150
120
50
45
50
UNITS
UNITS
UNITS
pF
pF
CC
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
= 5.0V
(t
NOTES
A
NOTES
NOTES
041697 7/11
= 25 C)
DS1643
5
6
5
6
10%)