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參數(shù)資料
| 型號： | CY7C4215-25AIT |
| 廠商： | CYPRESS SEMICONDUCTOR CORP |
| 元件分類： | FIFO |
| 英文描述： | 512 X 18 OTHER FIFO, 15 ns, PQFP64 |
| 封裝： | 14 X 14 MM, PLASTIC, TQFP-64 |
| 文件頁數(shù)： | 7/25頁 |
| 文件大?。?/td> | 412K |
| 代理商： | CY7C4215-25AIT |
CY7C4425/4205/4215
CY7C4225/4235/4245
15
every valid read cycle after retransmit, previously accessed
data is read and the read pointer is incremented until it is equal
to the write pointer. Flags are governed by the relative loca-
tions of the read and write pointers and are updated during a
retransmit cycle. Data written to the FIFO after activation of RT
are transmitted also.
The full depth of the FIFO can be repeatedly retransmitted.
Width Expansion Configuration
The CY7C42X5 can be expanded in width to provide word
widths greater than 18 in increments of 18. During width ex-
pansion mode all control line inputs are common and all flags
are available. Empty (Full) flags should be created by ANDing
the Empty (Full) flags of every FIFO. This technique will avoid
ready data from the FIFO that is “staggered” by one clock cycle
due to the variations in skew between RCLK and WCLK.
Figure 1 demonstrates a 36-word width by using two CY7C42X5.
Table 2. Flag Truth Table.
Number of Words in FIFO
FF
PAF
HF
PAE
EF
7C4425 - 64 x 18
7C4205 - 256 x 18
7C4215 - 512 x 18
0
H
L
1 to n[37
1 to n[37]
H
L
H
(n+1) to 32
(n+1) to 128
(n+1) to 256
H
33 to (64 – (m+1))
129 to (256 – (m+1))
257 to (512 – (m+1))
H
L
H
(64 – m)[38] to 63
(256 – m)[38] to 255
(512 – m)[38] to 511
H
L
H
64
256
512
L
H
Number of Words in FIFO
FF
PAFHFPAE
EF
7C4225 - 1K x 18
7C4235 - 2K x 18
7C4245 - 4K x 18
000
H
L
1 to n[37]
HH
H
L
H
(n+1) to 512
(n+1) to 1024
(n+1) to 2048
H
513 to (1024 – (m+1))
1025 to (2048 – (m+1))
2049 to (4096 – (m+1))
H
L
H
(1024 – m)[38] to 1023
(2048 – m)[38] to 2047
(4096 – m)[38] to 4095
H
L
H
1024
2048
4096
L
H
Notes:
37. n = Empty Offset (Default Values: CY7C4425 n = 7, CY7C4205 n = 31, CY7C4215 n = 63, CY7C4225/7C4235/7C4245 n = 127).
38. m = Full Offset (Default Values: CY7C4425 n = 7, CY7C4205 n = 31, CY7C4215 n = 63, CY7C4225/7C4235/7C4245 n = 127).
Figure 1. Block Diagram of 64x36/256 x 36/512 x 36/1024 x 36/2048 x 36/4096 x 36 Synchronous FIFO Memory Used in a
Width Expansion Configuration.
42X5–24
FF
EF
WRITECLOCK (WCLK)
WRITEENABLE (WEN)
LOAD (LD)
PROGRAMMABLE(PAE)
HALF FULL FLAG (HF)
FULL FLAG (FF)
7C4425
7C4205
7C4215
7C4225
7C4235
7C4425
7C4205
7C4215
7C4225
7C4235
18
36
DATA IN (D)
RESET (RS)
18
RESET (RS)
READ CLOCK (RCLK)
READ ENABLE (REN)
OUTPUTENABLE (OE)
PROGRAMMABLE(PAF)
EMPTYFLAG (EF)
18
DATA OUT (Q)
18
36
FIRSTLOAD (FL)
WRITE EXPANSION IN (WXI)
READ EXPANSION IN (RXI)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CY7C4205-10ACT | 256 X 18 OTHER FIFO, 8 ns, PQFP64 |
| CY7C4235V-25JC | 2K X 18 OTHER FIFO, 15 ns, PQCC68 |
| CY7C4241-35JC | 4K X 9 OTHER FIFO, 20 ns, PQCC32 |
| CY7C4421-15JIT | 64 X 9 OTHER FIFO, 10 ns, PQCC32 |
| CY7C4421-25AC | 64 X 9 OTHER FIFO, 15 ns, PQFP32 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CY7C4215V-15ASC | 功能描述:IC SYNC FIFO MEM 512X18 64LQFP RoHS:否 類別:集成電路 (IC) >> 邏輯 - FIFO 系列:CY7C 標(biāo)準(zhǔn)包裝:90 系列:7200 功能:同步 存儲容量:288K（16K x 18） 數(shù)據(jù)速率:100MHz 訪問時(shí)間:10ns 電源電壓:4.5 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:64-LQFP 供應(yīng)商設(shè)備封裝:64-TQFP（14x14） 包裝:托盤 其它名稱:72271LA10PF |
| CY7C4215V-15ASXC | 功能描述:先進(jìn)先出 512 X18 LO VLTG SYNC 先進(jìn)先出 COM RoHS:否 制造商:IDT 電路數(shù)量: 數(shù)據(jù)總線寬度:18 bit 總線定向:Unidirectional 存儲容量:4 Mbit 定時(shí)類型:Synchronous 組織:256 K x 18 最大時(shí)鐘頻率:100 MHz 訪問時(shí)間:10 ns 電源電壓-最大:3.6 V 電源電壓-最小:6 V 最大工作電流:35 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-80 封裝: |
| CY7C4215V-25ASC | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| CY7C421-65AC | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| CY7C421-65JC | 制造商:Cypress Semiconductor 功能描述:512 X 9 OTHER FIFO, 65 ns, PQCC32 |
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