DS1744W-120 Maxim Integrated Products, DS1744W-120 Datasheet - Page 11

• Manufacturer Part Number: DS1744W-120
• Description: IC RTC RAM Y2K 3.3V 120NS 28EDIP
• Manufacturer: Maxim Integrated Products
• Type: Clock/Calendar/NVSRAM/Y2Kr

Specifications of DS1744W-120

• Memory Size: 256K (32K x 8)
• Time Format: HH:MM:SS (24 hr)
• Date Format: YY-MM-DD-dd
• Interface: Parallel
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 28-DIP Module (600 mil), 28-EDIP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

AC CHARACTERISTICS—WRITE CYCLE (5V)
(V
Write Cycle Time
Address Setup Time
Data Setup Time
Data Hold Time
Data Hold Time
Address Hold Time
Address Hold Time
Write Recovery Time
AC CHARACTERISTICS—WRITE CYCLE (3.3V)
(V
Write Cycle Time
Address Setup Time
Data Setup Time
Data Hold Time
Data Hold Time
Address Hold Time
Address Hold Time
Write Recovery Time
CE Pulse Width
CE Pulse Width
CE and CE2 Pulse Width
WE Pulse Width
WE Data Off Time
WE Pulse Width
WE Data Off Time
CC
CC
= 5.0V 10%, T
= 3.3V 10%, T
PARAMETER
PARAMETER
A
A
= Over the operating range.)
= Over the operating range.)
SYMBOL
SYMBOL
t
t
t
t
t
t
t
t
t
WEW
t
t
t
t
CEW
t
t
t
t
t
t
WEZ
DH1
DH2
AH1
AH2
WEW
t
t
CEW
CEW
WC
WR
t
t
WEZ
DH1
DH2
AH1
AH2
AS
DS
WC
WR
AS
DS
DS1744/DS1744P Y2K-Compliant, Nonvolatile Timekeeping RAMs
MIN
70
50
60
30
11 of 16
MIN
0
0
0
5
5
5
120
100
110
110
80
10
10
0
0
0
0
TYP
TYP
MAX
MAX
25
120
40
UNITS
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
NOTES
NOTES
8
9
8
9
8
9
8
9