CY7C138-25JXC Cypress Semiconductor Corp, CY7C138-25JXC Datasheet - Page 15
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CY7C138-25JXC
Manufacturer Part Number
CY7C138-25JXC
Description
IC SRAM 32KBIT 25NS 68PLCC
Manufacturer
Cypress Semiconductor Corp
Type
Asynchronousr
Datasheet
1.CY7C138-25JXC.pdf
(21 pages)
Specifications of CY7C138-25JXC
Memory Size
32K (4K x 8)
Package / Case
68-PLCC
Format - Memory
RAM
Memory Type
SRAM - Dual Port, Asynchronous
Speed
25ns
Interface
Parallel
Voltage - Supply
4.5 V ~ 5.5 V
Operating Temperature
0°C ~ 70°C
Access Time
25 ns
Supply Voltage (max)
5.5 V
Supply Voltage (min)
4.5 V
Maximum Operating Current
180 mA
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Mounting Style
SMD/SMT
Number Of Ports
2
Operating Supply Voltage
5 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Other names
428-2148
CY7C138-25JXC
CY7C138-25JXC
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
CY7C138-25JXC
Manufacturer:
Cypress Semiconductor Corp
Quantity:
10 000
Table 3. Non-Contending Read/Write
Table 4. Interrupt Operation Example (assumes BUSY
Table 5. Semaphore Operation Example
Document #: 38-06037 Rev. *G
Set left INT
Reset left INT
Set right INT
Reset right INT
No action
Left port writes semaphore
Right port writes 0 to semaphore
Left port writes 1 to semaphore
Left port writes 0 to semaphore
Right port writes 1 to semaphore
Left port writes 1 to semaphore
Right port writes 0 to semaphore
Right port writes 1 to semaphore
Left port writes 0 to semaphore
Left port writes 1 to semaphore
CE
H
H
X
H
L
L
L
R/W
X
H
X
H
X
L
Function
Function
Inputs
OE
H
X
L
X
L
X
X
SEM
H
X
H
H
L
L
L
High Z
Data out
High Z
Data in
Data ut
Data in
R/W
I/O
X
X
X
L
0-7
1
0
0
1
1
0
1
1
1
0
1
L
=BUSY
Left
Outputs
CE
X
L
L
X
I/O
0-7
Left Port
R
=HIGH)
OE
I/O
X
X
X
L
0-7
1
1
1
0
0
1
1
0
1
1
1
Right
A
FFE
FFF
0-11
X
X
Power-down
Read data in semaphore
I/O lines disabled
Write to semaphore
Read
Write
Illegal condition
Semaphore free
Left port obtains semaphore
Right side is denied access
Right port is granted access to semaphore
No change. Left port is denied access
Left port obtains semaphore
No port accessing semaphore address
Right port obtains semaphore
No port accessing semaphore
Left port obtains semaphore
No port accessing semaphore
INT
H
X
X
L
R/W
X
X
X
L
Operation
CE
L
X
X
L
Status
Right Port
OE
X
X
X
L
CY7C138
A
FFE
FFF
Page 15 of 21
0-11
X
X
INT
X
X
H
L
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