IDT7026L15JG IDT, Integrated Device Technology Inc, IDT7026L15JG Datasheet - Page 14

• Manufacturer Part Number: IDT7026L15JG
• Description: IC SRAM 256KBIT 15NS 84PLCC
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of IDT7026L15JG

• Format - Memory: RAM
• Memory Type: SRAM - Dual Port, Asynchronous
• Memory Size: 256K (16K x 16)
• Speed: 15ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 84-PLCC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 7026L15JG; 800-1366; 800-1366-5; 800-1366

Truth Table III — Example of Semaphore Procurement Sequence
Waveform of BUSY Arbitration Cycle Controlled by
Address Match Timing (M/S = V
NOTES:
1. All timing is the same for left and right ports. Port “A” may be either the left or right port. Port “B” is the port opposite from “A”.
2. If t
Waveform of BUSY Arbitration Controlled by CE Timing (M/S = V
NOTES:
1. This table denotes a sequence of events for only one of the eight semaphores on the IDT7026.
2. There are eight semaphore flags written to via I/O
3. CE = VIH, SEM = VIL to access the semaphores. Refer to the semaphore Read/Write Control Truth Table.
No Action
Left Port Writes "0" to 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
IDT7026S/L
High-Speed 16K x 16 Dual-Port Static RAM
ADDR
ADDR
BUSY
ADDR
BUSY
APS
and
CE
CE
is not satisfied, the BUSY signal will be asserted on one side or another but there is no guarantee on which side BUSY will be asserted.
"A"
"B"
"B"
"A"
"B"
"A"
"B"
"B"
Functions
t
APS
(2)
t
APS
(2)
D
0
t
BAA
- D
0
and read from all I/O's (I/O
1
0
0
1
1
0
1
1
1
0
1
15
ADDRESS "N"
MATCHING ADDRESS "N"
Left
t
BAC
IH
D
)
0
(1)
ADDRESSES MATCH
- D
15
1
1
1
0
0
1
1
0
1
1
1
6.42
14
Right
0
-I/O
15
). These eight semaphores are addressed by A
Semaphore free
Right port obtains semaphore token
No change. Left port has no write access to semaphore
Semaphore free
Left port has semaphore token
Semaphore free
Left port has semaphore token
No change. Right side has no write access to semaphore
Left port obtains semaphore token
Right port has semaphore token
Semaphore free
Military, Industrial and Commercial Temperature Ranges
t
t
BDA
BDC
Status
0
- A
2
.
IH
(1,2,3)
)
(1)
2939 drw 15
2939 drw 14
2939 tbl 15