6.42
IDT71342SA/LA
High-Speed 4K x 8 Dual-Port Static RAM with Semaphore Industrial and Commercial Temperature Ranges
8
AC Electrical Characteristics Over the
Operating Temperature Supply Voltage
(5)
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 SRAM, CE = V
IL and SEM = VIH. To access semaphore, CE = VIH and SEM = VIL. Either condition must be valid for the entire tEW time.
4. The specification for t
DH must be met by the device supplying write data to the SRAM 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 number indicates power rating (SA or LA).
Symbol Parameter
71342X20
Com'l Only
71342X25
Com'l & Ind
71342X35
Com'l Only
UnitMin. Max. Min. Max. Min. Max.
WRIT E CYCL E
t
WC Write Cycle Time 20
____
25
____
35
____
ns
t
EW Chip Enable to End-of-Write
(3)
15
____
20
____
30
____
ns
t
AW Address Valid to End-of-Write 15
____
20
____
30
____
ns
t
AS Address Set-up Time 0
____
0
____
0
____
ns
t
WP Write Pulse Width 15
____
20
____
25
____
ns
t
WR Write Recovery Time 0
____
0
____
0
____
ns
t
DW Data Valid to End-of-Write 15
____
15
____
20
____
ns
t
HZ Output High-Z Time
(1,2)
____
15
____
15
____
20 ns
t
DH Data Hold Time
(4)
0
____
0
____
3
____
ns
t
WZ Write Enable to Output in High-Z
(1,2)
____
15
____
15
____
20 ns
t
OW Output Ac tive from End -of-Write
(1,2,4)
3
____
3
____
3
____
ns
t
SWR
SEM Flag Write to Read Time
10
____
10
____
10
____
ns
t
SPS
SEM Flag Contention Window
10
____
10
____
10
____
ns
2721 tbl 10a
Symbol Parameter
71342X45
Com'l Only
71342X55
Com'l Only
71342X70
Com'l Only
UnitMin. Max. Min. Max. Min. Max.
WRIT E CYCL E
t
WC Write Cycle Time 45
____
55
____
70
____
ns
t
EW Chip Enable to End-of-Write
(3)
40
____
50
____
60
____
ns
t
AW Address Valid to End-of-Write 40
____
50
____
60
____
ns
t
AS Address Set-up Time 0
____
0
____
0
____
ns
t
WP Write Pulse Width 40
____
50
____
60
____
ns
t
WR Write Recovery Time 0
____
0
____
0
____
ns
t
DW Data Valid to End-of-Write 20
____
25
____
30
____
ns
t
HZ Output High-Z Time
(1,2)
____
20
____
25
____
30 ns
t
DH Data Hold Time
(4)
3
____
3
____
3
____
ns
t
WZ Write Enable to Output in High-Z
(1,2)
____
20
____
25
____
30 ns
t
OW Output Ac tive from End -of-Write
(1,2,4)
3
____
3
____
3
____
ns
t
SWR
SEM Flag Write to Read Time
10
____
10
____
10
____
ns
t
SPS
SEM Flag Contention Window
10
____
10
____
10
____
ns
2721 tbl 10b