IDT71V321/71V421S/L
High Speed 3.3V 2K x 8 Dual-Port Static RAM with Interrupts
Industrial and Commercial Temperature Ranges
AC Electrical Characteristics Over the
OperatingTemperatureandSupplyVoltageRange(1)
71V321X25
71V421X25
Com'l
71V321X35
71V421X35
Com'l Only
71V321X55
71V421X55
Com'l Only
& Ind
Symbol
Parameter
Min.
Max.
Min.
Max.
Min.
Max.
Unit
INTERRUPT TIMING
____
____
____
____
____
____
AS
t
Addre ss Set-up Time
0
0
0
ns
ns
ns
WR
t
Write Recove ry Time
Inte rrupt Se t Time
0
0
0
____
____
____
INS
t
25
25
25
25
45
45
____
____
____
INR
t
Inte rrupt Re se t Time
ns
3026 tbl 12
NOTES:
1. 'X' in part numbers indicates power rating (S or L).
TimingWaveformof InterruptMode(1)
SET INT
WC
t
INTERRUPT ADDRESS(2)
ADDR"A"
(4)
(3)
AS
t
WR
t
R/W"A"
INT"B"
(3)
INS
t
3026 drw 14
CLEAR INT
tRC
INTERRUPT CLEAR ADDRESS(2)
ADDR"B"
(3)
tAS
OE"B"
INT"A"
(3)
tINR
3026 drw 15
NOTES:.
1. All timing is the same for left and right ports. Port “A” may be either left or right port. Port “B” is the opposite from port “A”.
2. See Interrupt Truth Table.
3. Timing depends on which enable signal (CE or R/W) is asserted last.
4. Timing depends on which enable signal (CE or R/W) is de-asserted first.
11
6.42
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
