参数资料
型号: IDT7143LA25JI8
厂商: IDT, Integrated Device Technology Inc
文件页数: 10/17页
文件大小: 0K
描述: IC SRAM 32KBIT 25NS 68PLCC
标准包装: 250
格式 - 存储器: RAM
存储器类型: SRAM - 双端口,异步
存储容量: 32K(2K x 16)
速度: 25ns
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: 68-LCC(J 形引线)
供应商设备封装: 68-PLCC(24x24)
包装: 带卷 (TR)
其它名称: 7143LA25JI8
IDT7133SA/LA, IDT7143SA/LA
High-Speed 2K x 16 Dual-Port RAM
Military, Industrial and Commercial Temperature Ranges
AC Electrical Characteristics Over the
Operating Temperature and Supply Voltage (6)
7133X20
7143X20
Com'l Only
7133X25
7143X25
Com'l & Ind
7133X35
7143X35
Com'l
& Military
Symbol
Parameter
Min.
Max.
Min.
Max.
Min.
Max.
Unit
BUSY TIMING (For MASTER 71V33)
t BAA
t BDA
t BAC
t BDC
t WDD
BUSY Access Time from Address
BUSY Disable Time from Address
BUSY Access Time from Chip Enable
BUSY Disable Time from Chip Enable
Write Pulse to Data Delay (1)
____
____
____
____
____
20
20
20
17
40
____
____
____
____
____
20
20
20
20
50
____
____
____
____
____
30
30
25
25
60
ns
ns
ns
ns
ns
t DDD
t BDD
Write Data Valid to Read Data Delay
BUSY Disable to Valid Data (2)
(1)
____
____
30
25
____
____
35
30
____
____
45
35
ns
ns
t APS
t WH
Arbitration Priority Set-up Time
Write Hold After BUSY (5)
(3)
5
20
____
____
5
20
____
____
5
25
____
____
ns
ns
BUSY INPUT TIMING (For SLAVE 71V43)
t WB
t WH
BUSY Input to Write (4)
Write Hold After BUSY (5)
0
20
____
____
0
20
____
____
0
25
____
____
ns
ns
t WDD
Write Pulse to Data Delay
(1)
____
40
____
50
____
60
ns
t DDD
Write Data Valid to Read Data Delay (1)
____
30
____
35
____
45
ns
2746 tbl 12a
7133X45
7143X45
Com'l Only
7133X55
7143X55
Com'l, Ind
& Military
7133X70/90
7143X70/90
Com'l &
Military
Symbol
Parameter
Min.
Max.
Min.
Max.
Min.
Max.
Unit
BUSY TIMING (For MASTER 71V33)
t BAA
t BDA
t BAC
t BDC
BUSY Access Time from Address
BUSY Disable Time from Address
BUSY Access Time from Chip Enable
BUSY Disable Time from Chip Enable
____
____
____
____
40
40
30
25
____
____
____
____
40
40
35
30
____
____
____
____
45/45
45/45
35/35
30/30
ns
ns
ns
ns
t WDD
Write Pulse to Data Delay
(1)
____
80
____
80
____
90/90
ns
t DDD
Write Data Valid to Read Data Delay (1)
____
55
____
55
____
70/70
ns
t BDD
BUSY Disable to Valid Data
(2)
____
40
____
40
____
40/40
ns
t APS
Arbitration Priority Set-up Time (3)
5
____
5
____
5/5
____
ns
t WH
Write Hold After BUSY
(5)
30
____
30
____
30/30
____
ns
BUSY INPUT TIMING (For SLAVE 71V43)
t WB
BUSY Input to Write (4)
0
____
0
____
0/0
____
ns
t WH
Write Hold After BUSY
(5)
30
____
30
____
30/30
____
ns
t WDD
Write Pulse to Data Delay
(1)
____
80
____
80
____
90/90
ns
t DDD
Write Data Valid to Read Data Delay (1)
____
55
____
55
____
70/70
ns
2746 tbl 12b
NOTES:
1. Port-to-port delay through RAM cells from writing port to reading port, refer to “Timing Waveform of Write with Port-to-Port Read and Busy".
2. t BDD is calculated parameter and is greater of 0, t WDD - t WP (actual) or t DDD - t DW (actual).
3. To ensure that the earlier of the two ports wins.
4. To ensure that the write cycle is inhibited on port "B" during contention on port "A".
5. To ensure that a write cycle is completed on port "B" after contention on port "A".
6. 'X' in part number indicates power rating (SA or LA).
10
6.42
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