IDT7038L
High-Speed 64K x 18 Dual-Port Static RAM
Industrial and Commercial Temperature Ranges
Waveform of BUSY Arbitration Controlled by CE Timing (M/ S = V IH ) (1,3)
ADDR "A"
and "B"
CE "A"
CE "B"
t APS
(2)
ADDRESSES MATCH
t BAC
t BDC
BUSY "B"
4837 drw 13
Waveform of BUSY Arbitration Cycle Controlled by Address Match
Timing (M/ S = V IH ) (1)
ADDR "A"
ADDR "B"
t APS
ADDRESS "N"
(2)
MATCHING ADDRESS "N"
BUSY "B"
t BAA
t BDA
4837 drw 14
NOTES:
1. 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”.
2. If t APS is not satisfied, the BUSY signal will be asserted on one side or another but there is no guarantee on which side BUSY will be asserted.
3. Refer to Chip Enable Truth Table.
AC Electrical Characteristics Over the
Operating Temperature and Supply Voltage Range
7038L15
Com'l Only
7038L20
Com'l & Ind
Symbol
Parameter
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
____
____
____
____
15
15
0
0
____
____
____
____
20
20
ns
ns
ns
ns
4837 tbl 15
12
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