IDT7134 查看數據表（PDF） - Integrated Device Technology
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IDT7134 Datasheet PDF : 9 Pages
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IDT7134SA/LA
HIGH-SPEED 4K x 8 DUAL-PORT STATIC RAM
MILITARY AND COMMERCIAL TEMPERATURE RANGES
AC ELECTRICAL CHARACTERISTICS OVER THE
OPERATING TEMPERATURE AND SUPPLY VOLTAGE(6) (CONT'D)
Symbol
Parameter
7134X45
Min. Max.
7134X55
Min. Max.
7134X70
Min. Max. Unit
WRITE CYCLE
tWC
Write Cycle Time
45
—
55
—
70
—
ns
tEW
Chip Enable to End-of-Write
40
—
50
—
60
—
ns
tAW
Address Valid to End-of-Write
40
—
50
—
60
—
ns
tAS
Address Set-up Time
0
—
0
—
0
—
ns
tWP
Write Pulse Width
40
—
50
—
60
—
ns
tWR
Write RecoveryTime
0
—
0
—
0
—
ns
tDW
Data Valid to End-of-Write
tHZ
Output High-Z Time(1, 2)
tDH
Data Hold Time(3)
tWZ
Write Enabled to Output in High-Z(1, 2)
20
—
25
—
30
—
ns
—
20
—
25
—
30
ns
3
—
3
—
3
—
ns
—
20
—
25
—
30
ns
tOW
Output Active from End-of-Write(1, 2, 3)
3
—
3
—
3
—
ns
tWDD
tDDD
Write Pulse to Data Delay(4)
Write Data Valid to Read Data Delay(4)
—
70
—
80
—
90
ns
—
45
—
55
—
70
ns
NOTES:
2720 tbl 10
1. Transition is measured ±500mV 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. The specification for tDH 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 tDH will always be smaller than the actual tOW.
4. Port-to-port delay through RAM cells from writing port to reading port, refer to “Timing Waveform of Write with Port-to-Port Read”.
5. (Commercial only), 0°C to +70°C temperature range .
6. “X” in part number indicates power rating (SA or LA).
TIMING WAVEFORM OF WRITE WITH PORT-TO-PORT READ (1)
tWC
ADDR "A"
MATCH
W R/ "A"
tWP
tAW
tDW
DATAIN "A"
VALID
ADDR "B"
DATAOUT "B"
NOTES:
1. Write cycle parameters should be adhered to, in order to ensure proper writing.
2. CEL = CER = VIL. OE"B" = VIL.
3. Port "A" may be either left or right port. Port "B" is the opposite from port "A".
MATCH
tWDD
tDDD
VALID
2720 drw 10
6.04
7
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