参数资料
型号: IDT7009L20PFI
厂商: IDT, Integrated Device Technology Inc
文件页数: 9/17页
文件大小: 0K
描述: IC SRAM 1MBIT 20NS 100TQFP
标准包装: 6
格式 - 存储器: RAM
存储器类型: SRAM - 双端口,异步
存储容量: 1M (128K x 8)
速度: 20ns
接口: 并联
电源电压: 4.5 V ~ 5.5 V
工作温度: -40°C ~ 85°C
封装/外壳: 100-LQFP
供应商设备封装: 100-TQFP(14x14)
包装: 托盘
其它名称: 7009L20PFI
IDT7009L
High-Speed 128K x 8 Dual-Port Static RAM
Industrial and Commercial Temperature Ranges
Timing Waveform of Semaphore Read after Write Timing, Either Side (1)
t SAA
t OH
A 0 -A 2
VALID ADDRESS
VALID ADDRESS
SEM
DATA 0
t AW
t WR
t EW
t DW
DATA IN VALID
t SOP
t ACE
DATA OUT
VALID (2)
R/ W
t AS
t WP
t DH
OE
t SWRD
t SOP
t AOE
Write Cycle
Read Cycle
4839 drw 09
NOTES:
1. CE = V IH for the duration of the above timing (both write and read cycle) (Refer to Chip Enable Truth Table).
2. "DATA OUT VALID" represents all I/O's (I/O 0 - I/O 7 ) equal to the semaphore value.
Timing Waveform of Semaphore Write Contention (1,3,4)
A 0"A" -A 2"A"
MATCH
SIDE
SIDE
(2)
(2)
"A"
"B"
R/ W "A"
SEM "A"
A 0"B" -A 2"B"
R/ W "B"
MATCH
t SPS
SEM "B"
4839 drw 10
.
NOTES:
1. D OR = D OL = V IL , CE L = CE R = V IH (Refer to Chip Enable Truth Table).
2. All timing is the same for left and right ports. Port "A" may be either left or right port. "B" is the opposite from port "A".
3. This parameter is measured from R/ W "A" or SEM "A" going HIGH to R/ W "B" or SEM "B" going HIGH.
4. If t SPS is not satisfied, the semaphore will fall positively to one side or the other, but there is no guarantee which side will obtain the flag.
9
6.42
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