Expand menu
Hello, Sign in
My Account
0
Cart
Home
Products
Sensors
Semiconductors
Passive Components
Connectors
Power
Electromechanical
Optoelectronics
Circuit Protection
Integrated Circuits - ICs
Main Products
Manufacturers
Blog
Services
About OMO
About Us
Contact Us
Check Stock
DS1554P-70+
P1-P3
P4-P6
P7-P9
P10-P12
P13-P15
P16-P18
DS1554 256k, Nonvolatile, Y2K-Compliant Timeke
eping RAM
13 of 18
AC CHARACTERISTICS—READ CYCLE
(T
A
= Over the operatin
g range)
V
CC
= 5.0V
10% V
CC
= 3.3V
10%
PARAMETER
SYMBOL
MIN MAX
MIN
MAX
UNITS
Read Cycle Time
t
RC
70
120
ns
Address Access Time
t
AA
70
120
ns
CE
to DQ Low-Z
t
CEL
5
5
ns
CE
Access Time
t
CEA
70
120
ns
CE
Data Off Time
t
CEZ
25
40
ns
OE
to DQ Low-Z
t
OEL
5
5
ns
OE
Access Time
t
OEA
35
100
ns
OE
Data Off Time
t
OEZ
25
35
ns
Output Hold from Address
t
OH
5
5
ns
AC CHARACTERISTICS—WRITE CYCLE
(T
A
= Over the operatin
g range)
V
CC
= 5.0V
10% V
CC
= 3.3V
10%
PARAMETER SYMBOL
MIN MAX
MIN
MAX
UNITS
Write Cycle Time
t
WC
70
120
ns
Address Access Time
t
AS
0
0
ns
WE
Pulse Width
t
WEW
50
100
ns
CE
Pulse Width
t
CEW
60
110
ns
Data Setup Time
t
DS
30
80
ns
Data Hold Time (Note 9)
t
DH1
5
5
ns
Data Hold Time (Note 10)
t
DH2
5
5
ns
Address Hold Time (Note 9)
t
AH1
5
0
ns
Address Hold Time
(Note 10)
t
AH2
5
5
ns
WE
Data Off Time
t
WEZ
25
40
ns
Write Recovery Time
t
WR
5
10
ns
DS1554 256k, Nonvolatile, Y2K-Compliant Timeke
eping RAM
14 of 18
Figure 6. Write Cycle Timing,
Write-Enable Controlled
Figure 7. Write Cycle Timi
ng, Chip-Enable Controlled
DS1554 256k, Nonvolatile, Y2K-Compliant Timeke
eping RAM
15 of 18
POWER-UP/DOWN CHAR
ACTERISTICS—5V
(V
CC
= 5.0V
10%, T
A
= Over the operating range.)
PARAMETER SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
CE
or
WE
at V
IH
, Before
Power-Down
t
PD
0
s
V
CC
Fall Time: V
PF(MAX)
to V
PF(MIN)
t
F
300
s
V
CC
Fall Time: V
PF(MIN)
to V
SO
t
FB
10
s
V
CC
Rise Time: V
PF(MIN)
to V
PF(MAX)
t
R
0
s
V
PF
to
RST
High
t
REC
40
200
ms
Expected Data-Retention Time
(Oscillator On)
t
DR
(Notes 6, 7)
10
years
Figure 8. Power-Up/Down W
aveform Timing (5V Device )
P1-P3
P4-P6
P7-P9
P10-P12
P13-P15
P16-P18
DS1554P-70+
Mfr. #:
Buy DS1554P-70+
Manufacturer:
Maxim Integrated
Description:
Real Time Clock 256kB NV RAM Timekeeper
Lifecycle:
New from this manufacturer.
Delivery:
DHL
FedEx
Ups
TNT
EMS
Payment:
T/T
Paypal
Visa
MoneyGram
Western
Union
Products related to this Datasheet
DS1554-70+
DS1554WP-120IND+
DS1554P-70IND+
DS1554P-70+
DS1554-70IND+
DS1554W-120+
DS1554WP-120+
DS1554W-120IND+