6.42
IDT70T3719/99M
High-Speed 2.5V 256/128K x 72 Dual-Port Synchronous Static RAM Industrial and Commercial Temperature Ranges
10
AC Electrical Characteristics Over the Operating Temperature Range
(Read and Write Cycle Timing)
(2,3)
(VDD = 2.5V ± 100mV, TA = 0°C to +70°C)
NOTES:
1. The Pipelined output parameters (t
CYC2, tCD2) apply to either or both left and right ports when FT/PIPEX = VDD (2.5V). Flow-through parameters (tCYC1, tCD1)
apply when FT/PIPE = V
ss (0V) for that port.
2. All input signals are synchronous with respect to the clock except for the asynchronous Output Enable (OE), FT/PIPE and OPT. FT/PIPE and OPT should be
treated as DC signals, i.e. steady state during operation.
3. These values are valid for either level of V
DDQ (3.3V/2.5V). See page 6 for details on selecting the desired operating voltage levels for each port.
4. Guaranteed by design (not production tested).
70T3719/99M
S166
Com'l
Only
70T3719/99M
S133
Com'l
& Ind
Symbol Parameter Min.Max.Min.Max.Unit
t
CYC1
Clock Cycle Time (Flow-Through)
(1)
20
____
25
____
ns
t
CYC2
Clock Cycle Time (Pipelined)
(1)
6
____
7.5
____
ns
t
CH1
Clock High Time (Flow-Through)
(1)
8
____
10
____
ns
t
CL1
Clock Low Time (Flow-Through)
(1)
8
____
10
____
ns
t
CH2
Clock High Time (Pipelined)
(2)
2.4
____
3
____
ns
t
CL2
Clock Low Time (Pipelined)
(1)
2.4
____
3
____
ns
t
SA
Address Setup Time 1.7
____
1.8
____
ns
t
HA
Address Hold Time 0.5
____
0.5
____
ns
t
SC
Chip Enable Setup Time 1.7
____
1.8
____
ns
t
HC
Chip Enable Hold Time 0.5
____
0.5
____
ns
t
SB
Byte Enable Setup Time 1.7
____
1.8
____
ns
t
HB
Byte Enable Hold Time 0.5
____
0.5
____
ns
t
SW
R/W Setup Time 1.7
____
1.8
____
ns
t
HW
R/W Hold Time 0.5
____
0.5
____
ns
t
SD
Input Data Setup Time 1.7
____
1.8
____
ns
t
HD
Input Data Hold Time 0.5
____
0.5
____
ns
t
SAD
ADS Setup Time
1.7
____
1.8
____
ns
t
HAD
ADS Hold Time
0.5
____
0.5
____
ns
t
SCN
CNTEN Setup Time
1.7
____
1.8
____
ns
t
HCN
CNTEN Hold Time
0.5
____
0.5
____
ns
t
SRPT
REPEAT Setup Time
1.7
____
1.8
____
ns
t
HRPT
REPEAT Hold Time
0.5
____
0.5
____
ns
t
OE
Output Enable to Data Valid
____
4.4
____
4.6 ns
t
OLZ
(4)
Output Enable to Output Low-Z 1
____
1
____
ns
t
OHZ
(4)
Output Enable to Output High-Z 1 3.6 1 4.2 ns
t
CD1
Clock to Data Valid (Flow-Through)
(1)
____
12
____
15 ns
t
CD2
Clock to Data Valid (Pipelined)
(1)
____
3.6
____
4.2 ns
t
DC
Data Output Hold After Clock High 1
____
1
____
ns
t
CKHZ
(4)
Clock High to Output High-Z 1 3.6 1 4.2 ns
t
CKLZ
(4)
Clock High to Output Low-Z 1
____
1
____
ns
t
INS
Interrupt Flag Set Time
____
7
____
7ns
t
INR
Interrupt Flag Reset Time
____
7
____
7ns
t
COLS
Collision Flag Set Time
____
3.6
____
4.2 ns
t
COLR
Collision Flag Reset Time
____
3.6
____
4.2 ns
t
ZZSC
Sleep Mode Set Cycles 2
____
2
____
cycles
t
ZZRC
Sleep Mode Recovery Cycles 3
____
3
____
cycles
Port-to-Port Delay
t
CO
Clock-to-Clock Offset 5
____
6
____
ns
t
OFS
Clock-to-Clock Offset for Collision Detection
Please refer to collision Detection Timing Table
on Page 19.
5687 tbl 12
