
IDT70T653M
High-Speed 2.5V 512K x 36 Asynchronous Dual-Port Static RAM
Industrial and Commercial Temperature Ranges
Timing Waveform of Write with Port-to-Port Read (1,3)
t WC
ADDR "A"
MATCH
t WP
R/ W "A"
DATA IN "A"
t DW
VALID
t DH
ADDR "B"
MATCH
(4)
R/ W "B"
t WDD
DATA OUT "B"
VALID
NOTES:
1. CE 0L = CE 0R = V IL ; CE 1L = CE 1R = V IH .
t DDD (3)
5679 drw 14a
.
2. OE = V IL for the reading port.
3. 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 port "A".
4. R/ W B = V IH .
Timing Waveform of Write with BUSY
t WP
R/ W "A"
t WB
BUSY "B"
R/ W "B"
(2)
t WH (1)
NOTES:
1. t WH must be met for BUSY input.
2. BUSY is asserted on port "B" blocking R/ W "B" , until BUSY "B" goes HIGH.
AC Electrical Characteristics Over the
Operating Temperature and Supply Voltage Range (1,2)
5679 drw 15
.
70T653MS10
Com'l Only
70T653MS12
Com'l
& Ind
70T653MS15
Com'l Only
Symbol
Parameter
Min.
Max.
Min.
Max.
Min.
Max.
Unit
INTERRUPT TIMING
t AS
t WR
t INS
t INR
Address Set-up Time
Write Recovery Time
Interrupt Set Time
Interrupt Reset Time
0
0
____
____
____
____
10
10
0
0
____
____
____
____
12
12
0
0
____
____
____
____
15
15
ns
ns
ns
ns
NOTES:
1. Timing is the same for both ports.
2. These values are valid regardless of the power supply level selected for I/O and control signals (3.3V/2.5V). See page 6 for details.
16
5679 tbl 16