CY7C024-25JI CYPRESS [Cypress Semiconductor], CY7C024-25JI Datasheet - Page 8

• Manufacturer Part Number: CY7C024-25JI
• Description: 4K x 16/18 and 8K x 16/18 Dual-Port Static RAM with SEM, INT, BUSY
• Manufacturer: CYPRESS [Cypress Semiconductor]

Switching Characteristics
Data Retention Mode
The CY7C024/0241 is designed with battery backup in mind.
Data retention voltage and supply current are guaranteed over
temperature. The following rules insure data retention:
Document #: 38-06035 Rev. *B
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
Parameter
BUSY TIMING
INTERRUPT TIMING
SEMAPHORE TIMING
in V
during the power-up and power-down transitions.
imum operating voltage (4.5 volts).
[17]
CC
to V
CC
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
– 0.2V.
[16]
Description
[16]
CC
– 0.2V and 70% of V
Over the Operating Range
RC
after V
CC
7C024/0241–15
7C025/0251–15
reaches the min-
Min.
13
10
5
0
5
5
Note 17
CC
Max.
15
15
15
15
15
15
15
[10]
(continued)
7C024/0241–25
7C025/0251–25
Min.
Timing
Notes:
V
16. Test conditions used are Load 2.
17. t
18. CE = V
CE
20
12
10
10
ICC
5
0
CC
Parameter
t
tested.
DR1
BDD
DDD
Note 17
–
is a calculated parameter and is the greater of t
Max.
CC
t
SD
20
20
20
20
20
20
25
, V
(actual).
in
= GND to V
7C024/0241–35
7C025/0251–35
4.5V
Min.
30
15
10
10
@ VCC
Data Retention Mode
5
0
Test Conditions
V
CC
CC
, T
V
to V
CC
A
Note 17
DR
= 25°C. This parameter is guaranteed but not
Max.
> 2.0V
CC
20
20
20
20
25
25
35
= 2V
– 0.2V
CY7C024/0241
CY7C025/0251
7C024/0241–55
7C025/0251–55
Min.
[18]
40
20
15
15
4.5V
5
0
WDD
Note 17
Max.
1.5
Max.
–
45
40
40
35
30
30
55
V
Page 8 of 20
t
t
IH
7C024–13
PWE
RC
(actual) or
Unit
mA
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns