DS1744W-120 Maxim Integrated Products, DS1744W-120 Datasheet - Page 10

• 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—READ CYCLE (3.3V)
(V
Read Cycle Time
Address Access Time
Output Hold from Address
READ CYCLE TIMING DIAGRAM
CE to DQ Low-Z
CE Access Time
CE Data Off Time
OE to DQ Low-Z
OE Access Time
OE Data Off Time
CC
= 3.3V 10%, T
PARAMETER
A
= Over the operating range.)
SYMBOL
t
t
t
t
t
t
t
t
t
OEA
CEA
OEL
OEZ
CEL
CEZ
RC
AA
OH
DS1744/DS1744P Y2K-Compliant, Nonvolatile Timekeeping RAMs
10 of 16
MIN
120
5
5
5
TYP
MAX
120
120
100
40
35
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
NOTES