IDT70V27 Integrated Device Technology, IDT70V27 Datasheet - Page 13

• Manufacturer Part Number: IDT70V27
• Description: 32k X 16 3.3v Dual-port Ram
• Manufacturer: Integrated Device Technology

AC Electrical Characteristics Over the
Operating Temperature and Supply Voltage Range
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).
BUSY TIMING (M/S=V
BUSY TIMING (M/S=V
PORT-TO-PORT DELAY TIMING
BUSY TIMING (M/S=V
BUSY TIMING (M/S=V
PORT-TO-PORT DELAY TIMING
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
BAA
BDA
BAC
BDC
APS
BDD
WH
WB
WH
WDD
DDD
BAA
BDA
BAC
BDC
APS
BDD
WH
WB
WH
WDD
DDD
Symbol
Symbol
IDT 70V27S/L
High-Speed 3.3V 32K x 16 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 Disable 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
BUSY Access Time from Address Match
BUSY Disable Time from Address Not Matched
BUSY Access Time from Chip Enable Low
BUSY Disable 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
IH
IL
)
)
)
)
(4)
(4)
(5)
(5)
(5)
(5)
(1)
(1)
(3)
(3)
(2)
(2)
(1)
(1)
Parameter
WDD
Parameter
– t
WP
(actual), or t
DDD
13
– t
DW
(actual).
Commercial and Industrial Temperature Range
Min.
____
____
____
____
____
____
____
12
12
Com'l Only
5
0
70V27X15
Max.
____
____
____
____
15
15
15
15
17
30
25
(6)
Min.
Min.
____
____
____
____
____
____
____
Com'l & Ind
____
____
____
____
____
____
____
Com'l & Ind
25
25
15
15
5
0
5
0
70V27X35
70V27X20
Max.
Max.
____
____
____
____
____
____
____
____
20
20
20
20
35
45
30
35
35
35
35
40
65
60
Min.
Min.
____
____
____
____
____
____
____
____
____
____
____
____
____
____
25
25
20
20
Com'l Only
Com'l Only
5
0
5
0
70V27X25
70V27X55
Max.
Max.
____
____
____
____
____
____
____
____
25
25
25
25
35
55
50
45
45
45
45
50
85
80
IH
)".
3603 tbl 14b
3603 tbl 14a
Unit
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns