70V659S12DRI IDT, 70V659S12DRI Datasheet - Page 15

• Manufacturer Part Number: 70V659S12DRI
• Description: SRAM 128Kx36 STD-PWR 3.3V DUAL-PORT RAM
• Manufacturer: IDT
• Series: IDT70V659/58/57Sr
• Type: Dual Port RAMr

Specifications of 70V659S12DRI

• Memory Size: 4 Mbit
• Organization: 128 K x 36
• Access Time: 12 ns
• Supply Voltage - Max: 3.45 V
• Supply Voltage - Min: 3.15 V
• Maximum Operating Current: 515 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Package / Case: PQFP-208
• Interface: LVTTL
• Memory Type: Asynchronous
• Part # Aliases: IDT70V659S12DRI

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".
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
IDT70V659/58/57S
High-Speed 3.3V 128/64/32K x 36 Asynchronous Dual-Port Static RAM
Symbol
BDD
is a calculated parameter and is the greater of the Max. spec, 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
IH
IL
)
)
(4)
(5)
(5)
(1)
Parameter
(3)
(2)
(1)
WDD
– t
WP
15
(actual), or t
70V659/58/57S10
Min.
____
____
____
____
____
____
____
Com'l Only
5
8
0
8
DDD
– t
DW
Max.
____
____
____
____
10
10
10
10
10
22
20
Industrial and Commercial Temperature Ranges
(actual).
70V659/58/57S12
Min.
____
____
____
____
____
____
____
10
10
5
0
Com'l
& Ind
Max.
____
____
____
____
12
12
12
12
12
25
22
70V659/58/57S15
Min.
____
____
____
____
____
____
____
12
12
5
0
Com'l
& Ind
Max.
____
____
____
____
15
15
15
15
15
30
25
IH
)".
4869 tbl 14
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns