DS1647 Maxim, DS1647 Datasheet - Page 4

• Manufacturer Part Number: DS1647
• Description: The DS1647 is a 512k x 8 nonvolatile static RAM with a full-function real-time clock, which are both accessible in a byte-wide format
• Manufacturer: Maxim

Figure 1. Block Diagram
Table 1. Truth Table
<4.5V >V
5V ±10%
<V
V
CC
BAT
BAT
V
V
V
V
CE
X
X
X
IH
IL
IL
IL
OE
V
V
X
X
X
X
X
IL
IH
WE
V
V
V
X
X
X
X
IH
IH
IL
DS1647
4 of 12
Deselect
Deselect
Deselect
Deselect
MODE
Write
Read
Read
Data Out
High-Z
High-Z
Data In
High-Z
High-Z
High-Z
DQ
Data-Retention Mode
CMOS Standby
POWER
Standby
Standby
Active
Active
Active
DS1647/DS1647P