IDT71321SA_08 Datasheet, PDF (14/17 Pages) Integrated Device Technology – HIGH SPEED 2K X 8 DUAL-PORT STATIC RAM

IDT71321SA/LA and IDT71421SA/LA
High Speed 2K x 8 Dual-Port Static RAM with Interrupts
Industrial and Commercial Temperature Ranges
AC Electrical Characteristics Over the
Operating Temperature Supply Voltage Range⁽¹⁾
Symbol
INTERRUPT TIMING
tAS
Address Set-up Time
tWR
Write Recovery Time
tINS
Interrupt Set Time
tINR
Interrupt Reset Time
Parameter
NOTES:
1. 'X' in part numbers indicates power rating (SA or LA).
71321X35
71421X35
Com'l Only
Min. Max.
71321X55
71421X55
Com'l
& Ind
Min. Max. Unit
0
____
0
____
ns
0
____
0
____
ns
____
25
____
45
ns
____
25
____
45
ns
2691 tbl 11b
Timing Waveform of Interrupt Mode⁽¹⁾
SET INT
ADDR"A"
R/W"A"
INT"B"
tWC
INTERRUPT ADDRESS ⁽²⁾
tAS ⁽³⁾
tWR ⁽⁴⁾
tINS⁽³⁾
CLEAR INT
ADDR"B"
tRC
INTERRUPT CLEAR ADDRESS⁽²⁾
tAS⁽³⁾
OE"B"
INT"B"
tINR⁽³⁾
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.
2691 drw 14
,
2691 drw 15
61.442