DS1254 Maxim, DS1254 Datasheet - Page 9

• 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

BATTERY WARNING TIMING
(V
AC TEST CONDITIONS
Output Load:
Input Pulse Levels:
Timing Measurement Reference Levels:
Input Pulse Rise and Fall Times: 5ns
Figure 4. Memory Read Cycle Timing (Note 9)
Battery Test Cycle
Battery Test Pulse Width
Battery Test to BW Active
V
CC
CC
= 3.3V 10%, T
Valid to BW Valid
Input: 1.5V
Output: 1.5V
PARAMETER
ADDRESS
DQ0–DQ7
A
= 0
100pF + 1 TTL Gate
0V to 3.0V
OE
CE

C to +70

C)
SYMBOL
t
t
COE
t
BTPW
t
t
BTC
BPU
BW
t
ACC
t
CO
9 of 17
t
COE
t
OE
t
RC
MIN
DATA VALID
OUTPUT
t
TYP
OD
24
t
OD
t
OH
MAX
1
1
1
seconds
seconds
seconds
UNITS
hour
DS1254
NOTES
3