7008L20JI IDT, 7008L20JI Datasheet - Page 12

• Manufacturer Part Number: 7008L20JI
• Description: SRAM
• Manufacturer: IDT
• Type: Dual Port Static RAMr

Specifications of 7008L20JI

• Memory Size: 512 kbit
• Organization: 64 k x 8
• Access Time: 20 ns
• Supply Voltage - Max: 5.5 V
• Supply Voltage - Min: 4.5 V
• Maximum Operating Current: 50 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Package / Case: PLCC-84
• Interface: TTL
• Memory Type: Asynchronous
• Part # Aliases: IDT7008L20JI

NOTES:
1. Port-to-port delay through RAM cells from writing port to reading port, refer to "Timing Waveform of Write with Port-to-Port Read and BUSY (M/S = V
2. To ensure that the earlier of the two ports wins.
3. t
4. To ensure that the write cycle is inhibited on port "B" during contention on port "A".
5. To ensure that a write cycle is completed on port "B" after contention on port "A".
6. 'X' in part numbers indicates power rating (S or L).
AC Electrical Characteristics Over the
Operating Temperature and Supply Voltage Range
PORT-TO-PORT DELAY TIMING
BUSY TIMING (M/S=V
t
t
t
t
t
t
t
BUSY TIMING (M/S=V
t
t
t
t
BAA
BDA
BAC
BDC
APS
BDD
WH
WB
WH
WDD
DDD
Symbol
IDT7008S/L
High-Speed 64K x 8 Dual-Port Static RAM
BDD
is a calculated parameter and is the greater of 0, t
BUSY Access Time from Address Match
BUSY Disable Time from Address Not Matched
BUSY Access Time from Chip Enable Low
BUSY Access Time from Chip Enable High
Arbitration Priority Set-up Time
BUSY Disable to Valid Data
Write Hold After BUSY
BUSY Input to Write
Write Hold After BUSY
Write Pulse to Data Delay
Write Data Valid to Read Data Delay
IH
IL
)
)
Parameter
(4)
(5)
(5)
(1)
(3)
(2)
(1)
WDD
– t
WP
Min.
(actual) or t
Com'l Only
____
____
____
____
____
____
____
12
12
5
0
7008X15
Max.
____
____
____
____
30
25
15
15
15
15
15
DDD
12
– t
Min.
DW
____
____
____
____
____
____
____
15
15
5
0
7008X20
Com'l
& Ind
(actual).
Military, Industrial and Commercial Temperature Ranges
Max.
____
____
____
____
20
20
20
20
45
30
17
Min.
____
____
____
____
____
____
____
17
17
5
0
7008X25
Com'l &
Military
(6)
Max.
____
____
____
____
20
20
20
17
25
50
35
Min.
____
____
____
____
____
____
____
25
25
5
0
7008X35
Com'l &
Military
Max.
____
____
____
____
20
20
20
20
35
60
45
Com'l, Ind &
Min.
____
____
____
____
____
____
____
25
25
5
0
7008X55
Military
Max.
____
____
____
____
45
40
40
35
55
80
65
IH
)".
3198 tbl 14
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns