CY7C138-25JXI Cypress Semiconductor Corp, CY7C138-25JXI Datasheet - Page 15

• Manufacturer Part Number: CY7C138-25JXI
• Description: IC SRAM 32KBIT 25NS 68PLCC
• Manufacturer: Cypress Semiconductor Corp
• Type: Asynchronousr

Specifications of CY7C138-25JXI

• 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: -40°C ~ 85°C
• Access Time: 25 ns
• Maximum Clock Frequency: 1 MHz
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.5 V
• Maximum Operating Current: 180 mA
• Organization: 4 K x 8
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 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

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
[+] Feedback