DS1254 Maxim, DS1254 Datasheet - Page 11

• Manufacturer Part Number: DS1254
• Description: The DS1254 is a fully nonvolatile static RAM (NV SRAM) (organized as 2M words by 8 bits) with built-in real-time clock
• Manufacturer: Maxim

Figure 7. Read Cycle to Phantom Clock
Figure 8. Write Cycle to Phantom Clock
DQ0
OE
CE
WE = V
DQ0
WE
CE
IH
OE = V
IH
t
COE
t
CO
t
COE
t
OE
t
RC
11 of 17
DATA VALID
t
t
OUTPUT
WP
t
DS
WP
t
WC
DATA IN
STABLE
t
t
OD
t
RR
OD
t
t
WR
DH1
T
t
DH2
AH2
DS1254