CY7C025AV-25AC Cypress Semiconductor Corp, CY7C025AV-25AC Datasheet - Page 8

• Manufacturer Part Number: CY7C025AV-25AC
• Description: IC,SRAM,8KX16,CMOS,QFP,100PIN,PLASTIC
• Manufacturer: Cypress Semiconductor Corp

Switching Characteristics
Data Retention Mode
The CY7C024AV/025AV/026AV and CY7C0241AV/0251AV/
036AV are designed with battery backup in mind. Data reten-
tion voltage and supply current are guaranteed over tempera-
ture. The following rules ensure data retention:
Notes:
20. Test conditions used are Load 2.
21. t
22. CE = V
1. Chip Enable (CE) must be held HIGH during data retention, with-
2. CE must be kept between V
3. The RAM can begin operation >t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
BLA
BHA
BLC
BHC
PS
WB
WH
BDD
INS
INR
SOP
SWRD
SPS
SAA
BUSY TIMING
INTERRUPT TIMING
SEMAPHORE TIMING
in V
during the power-up and power-down transitions.
minimum operating voltage (3.0 volts).
Parameter
BDD
[21]
CC
is a calculated parameter and is the greater of t
CC
to V
, V
CC
in
= GND to V
– 0.2V.
[20]
BUSY LOW from Address Match
BUSY HIGH from Address Mismatch
BUSY LOW from CE LOW
BUSY HIGH from CE HIGH
Port Set-Up for Priority
R/W HIGH after BUSY (Slave)
R/W HIGH after BUSY HIGH (Slave)
BUSY HIGH to Data Valid
INT Set Time
INT Reset Time
SEM Flag Update Pulse (OE or SEM)
SEM Flag Write to Read Time
SEM Flag Contention Window
SEM Address Access Time
CC
[20]
, T
A
= 25 C. This parameter is guaranteed but not tested.
CC
Description
– 0.2V and 70% of V
Over the Operating Range
RC
after V
PRELIMINARY
WDD
–t
CC
PWE
reaches the
(actual) or t
CC
DDD
[14]
–t
SD
(continued)
8
(actual).
Min.
13
10
5
0
5
5
Timing
V
CE
ICC
CC
-15
Parameter
DR1
[1]
Max.
15
15
15
15
15
15
15
15
CY7C0241AV/0251AV/036AV
CY7C024AV/025AV/026AV
CY7C0241AV/0251AV/036AV
CY7C024AV/025AV/026AV
Min.
15
10
3.0V
5
0
5
5
@ VCC
Data Retention Mode
Test Conditions
V
-20
CC
V
to V
CC
Max.
20
20
20
17
20
20
20
20
DR
CC
2.0V
= 2V
– 0.2V
Min.
17
12
5
0
5
5
[22]
3.0V
-25
Max.
Max.
20
20
20
17
25
20
20
25
50
V
t
IH
RC
Unit
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
A