DS1554W-120 Maxim Integrated Products, DS1554W-120 Datasheet - Page 4

• Manufacturer Part Number: DS1554W-120
• Description: IC RTC RAM Y2K 3.3V 120NS 32EDIP
• Manufacturer: Maxim Integrated Products
• Type: Clock/Calendar/NVSRAM/Y2Kr

Specifications of DS1554W-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: 32-DIP Module (600 mil), 32-EDIP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Figure 1. Block Diagram
Table 1. Operating Modes
V
V
SO
CC
V
< V
CC
<V
V
> V
CC
SO
CC
< V
<V
PF
PF
PF
V
V
V
V
CE
X
X
IH
IL
IL
IL
V
OE
V
X
X
X
X
IH
IL
WE
V
V
V
X
X
X
IH
IH
IL
DS1554 256k, Nonvolatile, Y2K-Compliant Timekeeping RAM
4 of 18
DQ0–DQ7
High-Z
High-Z
High-Z
High-Z
D
D
OUT
IN
Data Retention
Deselect
Deselect
MODE
Write
Read
Read
DS1554
Maxim
CMOS Standby
Battery Current
POWER
Standby
Active
Active
Active