Commercial and Industrial Temperature Range
IDT 70V27S/L
High-Speed 3.3V 32K x 16 Dual-Port Static RAM
10
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= V
IL and SEM = VIH. To access semaphore, CE = VIH and SEM = VIL. Either condition must be valid for the entire tEW time. Refer to Chip Enable
Truth Table.
4. The specification for t
DH must be met by the device supplying write data to the RAM under all operating conditions. Although tDH and tOW values will vary over voltage
and temperature, the actual t
DH will always be smaller than the actual tOW.
5. 'X' in part numbers indicates power rating (S or L).
AC Electrical Characteristics Over the
Operating Temperature and Supply Voltage
(5)
Symbol Parameter
70V27X15
Com'l Only
70V27X20
Com'l & Ind
70V27X25
Com'l Only
UnitMin. Max. Min. Max. Min. Max.
WRI TE CYCLE
t
WC
Write Cycle Time 15
____
20
____
25
____
ns
t
EW
Chip Enable to End-of-Write
(3 )
12
____
15
____
20
____
ns
t
AW
Address Valid to End-of-Write 12
____
15
____
20
____
ns
t
AS
Address Set-up Time
(3 )
0
____
0
____
0
____
ns
t
WP
Write Pulse Width 12
____
15
____
20
____
ns
t
WR
Write Recovery Time 0
____
0
____
0
____
ns
t
DW
Data Valid to End-of-Write 10
____
15
____
15
____
ns
t
HZ
Output High-Z Time
(1,2)
____
10
____
10
____
15 ns
t
DH
Data Hold Time
(4 )
0
____
0
____
0
____
ns
t
WZ
Write Enable to Output in High-Z
(1,2)
____
10
____
10
____
15 ns
t
OW
Output Active from End-of-Write
(1 , 2,4 )
0
____
0
____
0
____
ns
t
SWRD
SEM Flag Write to Read Time
5
____
5
____
5
____
ns
t
SPS
SEM Flag Contention Window
5
____
5
____
5
____
ns
3603 tbl 13a
Symbol Parameter
70V27X35
Com'l & Ind
70V27X55
Com'l Only
UnitMin. Max. Min. Max.
WRITE CYCLE
t
WC
Write Cycle Time 35
____
55
____
ns
t
EW
Chip Enable to End-of-Write
(3)
30
____
45
____
ns
t
AW
Address Valid to End-of-Write 30
____
45
____
ns
t
AS
Address Set-up Time
(3)
0
____
0
____
ns
t
WP
Write Pulse Width 25
____
40
____
ns
t
WR
Write Recovery Time 0
____
0
____
ns
t
DW
Data Valid to End-of-Write 20
____
30
____
ns
t
HZ
Output High-Z Time
(1,2)
____
20
____
25 ns
t
DH
Data Hold Time
(4)
0
____
0
____
ns
t
WZ
Write Enable to Output in High-Z
(1,2)
____
20
____
25 ns
t
OW
Output Active from End-of-Write
(1,2,4)
0
____
0
____
ns
t
SWRD
SEM Flag Write to Read Time
5
____
5
____
ns
t
SPS
SEM Flag Contention Window
5
____
5
____
ns
3603 tbl 13b