参数资料
型号: IDT7027S55PF
厂商: IDT, Integrated Device Technology Inc
文件页数: 11/19页
文件大小: 0K
描述: IC SRAM 512KBIT 55NS 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: 512K (32K x 16)
速度: 55ns
接口: 并联
电源电压: 4.5 V ~ 5.5 V
工作温度: 0°C ~ 70°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: 7027S55PF
IDT7027S/L
High-Speed 32K x 16 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
t AW
t EW
t WR
t SOP
t AC E
t DW
I/O 0
DATA IN
VALID
DATA OUT
VALID (2)
R/ W
OE
t AS
t WP
Write Cycle
t DH
t SWRD
Read Cycle
t AOE
3199 drw 09
NOTES:
1. CE = V IH or UB and LB = 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 15 ) equal to the semaphore value.
Timing Waveform of Semaphore Write Contention (1,3,4)
A 0"A" -A 2"A"
MATCH
(2)
SIDE
(2)
SIDE
"A"
"B"
R/ W "A"
SEM "A"
A 0"B" -A 2"B"
R/ W "B"
SEM "B"
t SPS
MATCH
.
3199 drw 10
NOTES:
1. D OR = D OL = V IL , CE R = CE L = V IH , or both UB & LB = 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. 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, there is no guarantee which side will be granted the semaphore flag.
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