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70V25L25PFI Datasheet, PDF (11/25 Pages) Integrated Device Technology – True Dual-Ported memory cells which allow simultaneous reads of the same memory location
◁
IDT70V35/34S/L (IDT70V25/24S/L)
High-Speed 3.3V 8/4K x 18 (8/4K x 16) Dual-Port Static RAM
Industrial and Commercial Temperature Ranges
AC Electrical Characteristics Over the Operating
Temperature and Supply Voltage Range for 70V25/24(4)
70V25/24X15
Com'l Only
70V25/24X20
Com'l
& Ind
70V25/24X25
Com'l
& Ind
Symbol
Parameter
Min.
Max.
Min.
Max.
Min.
Max. Unit
READ CYCLE
tRC
Read Cycle Time
15
____
20
____
25
____
ns
tAA
Address Access Time
____
15
____
20
____
25
ns
tACE
Chip Enable Access Time(3)
____
15
____
20
____
25
ns
tABE
Byte Enable Access Time(3)
____
15
____
20
____
25
ns
tAOE
Output Enable Access Time(3)
____
10
____
12
____
13
ns
tOH
Output Hold from Address Change
3
____
3
____
3
____
ns
tLZ
Output Low-Z Time(1,2)
3
____
3
____
3
____
ns
tHZ
Output High-Z Time(1,2)
____
10
____
12
____
15
ns
tPU
Chip Enable to Power Up Time(1,2)
0
____
0
____
0
____
ns
tPD
Chip Disable to Power Down Time(1,2)
tSOP
Semaphore Flag Update Pulse (OE or SEM)
____
15
____
20
____
25
ns
10
____
10
____
10
____
ns
tSAA
Semaphore Address Access(3)
____
15
____
20
____
25
ns
5624 tbl 11a
Symbol
Parameter
READ CYCLE
tRC
Read Cycle Time
tAA
Address Access Time
tACE
Chip Enable Access Time(3)
tABE
Byte Enable Access Time(3)
tAOE
Output Enable Access Time(3)
tOH
Output Hold from Address Change
tLZ
Output Low-Z Time(1,2)
tHZ
Output High-Z Time(1,2)
tPU
Chip Enable to Power Up Time(1,2)
tPD
Chip Disable to Power Down Time(1,2)
tSOP
Semaphore Flag Update Pulse (OE or SEM)
tSAA
Semaphore Address Access(3)
70V25/24X35
Com'l Only
Min.
Max.
35
____
____
35
____
35
____
35
____
20
3
____
3
____
____
15
0
____
____
35
15
____
____
35
NOTES:
1. Transition is measured 0mV from Low or High-impedance voltage with Output Test Load (Figure 2).
2. This parameter is guaranteed by device characterization, but is not production tested.
3. To access RAM, CE = VIL, UB or LB = VIL, and SEM = VIH. To access semaphore, CE = VIH or UB & LB = VIH, and SEM = VIL.
4. 'X' in part number indicates power rating (S or L).
61.412
70V25/24X55
Com'l Only
Min. Max. Unit
55
____
ns
____
55
ns
____
55
ns
____
55
ns
____
30
ns
3
____
ns
3
____
ns
____
25
ns
0
____
ns
____
50
ns
15
____
ns
____
55
ns
5624 tbl 11b
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