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参数资料
| 型号： | CY7C4225-15JI |
| 厂商： | CYPRESS SEMICONDUCTOR CORP |
| 元件分类： | DRAM |
| 英文描述： | 64/256/512/1K/2K/4K x18 Low-Voltage Synchronous FIFOs |
| 中文描述： | 1K X 18 OTHER FIFO, 10 ns, PQCC68 |
| 封装： | PLASTIC, LCC-68 |
| 文件页数： | 11/25页 |
| 文件大小： | 409K |
| 代理商： | CY7C4225-15JI |
CY7C4425/4205/4215
CY7C4225/4235/4245
11
Notes:
23. PAF offset = m. Number of data words written into FIFO already = 64 – m + 1 for the CY7C4425, 256 – m + 1 for the CY7C4205, 512 – m + 1 for the
CY7C4215. 1024 – m + 1 for the CY7C4225, 2048 – m + 1 for the CY7C4235, and 4096 – m + 1 for the CY7C4245.
24. PAF is offset = m.
25. 64 – m words in CY7C4425, 256 – m words inCY7C4205, 512 – m word in CY7C4215. 1024 – m words in CY7C4225, 2048 – m words in CY7C4235, and
4096 – m words in CY7C4245.
26. 64 – m + 1 words in CY7C4425, 256 – m + 1 words in CY7C4205, 512 – m +1 words in CY7C4215, 1024 – m + 1 CY7C4225, 2048 – m + 1 in CY74235,
and 4096 – m + 1 words in CY7C4245.
27. If a write is performed on this rising edge of the write clock, there will be Full – (m – 1) words of the FIFO when PAF goes LOW.
28. PAF offset = m.
29. 64 – m words in CY7C4425, 256 – m words in FIFO for CY7C4205, 512 – m word in CY7C4215. 1024 – m words in CY7C4225, 2048 – m words in CY7C4235,
and 4096 – m words in CY7C4245.
30. t
is the minimum time between a rising RCLK and a rising WCLK edge for PAF to change state during that clock cycle. If the time between the edge of RCLK and the
rising edge of WCLK is less than t
SKEW3
, then PAF may not change state until the next WCLK rising edge.
Switching Waveforms
(continued)
Note
t
ENH
WEN
WCLK
REN
RCLK
t
CLKH
t
PAF
t
ENS
t
CLKL
t
ENS
t
PAF
42X5–15
FULL
M WORDS
IN FIFO
FULL
M + 1 WORDS
IN FIFO
Programmable Almost Full Flag Timing
[26]
PAF
[24]
23
[25]
Note
27
Note
28
t
ENH
WCLK
PAF
RCLK
t
CLKH
t
ENS
FULL
M WORDS
IN FIFO
t
CLKL
t
ENS
FULL-
M+1
ORDS
INFIFO
42X5–16
t
ENH
t
ENS
t
ENH
t
ENS
t
PAF
REN
WEN2
t
SKEW3
t
PAFsynch
[30]
WEN
Programmable Almost Full Flag Timing (applies only in SMODE (SMODE in LOW))
[29]
相关PDF资料 |
PDF描述 |
|---|---|
| CY7C4225-25AC | 64/256/512/1K/2K/4K x18 Low-Voltage Synchronous FIFOs |
| CY7C4225-25AI | 64/256/512/1K/2K/4K x18 Low-Voltage Synchronous FIFOs |
| CY7C4225-25ASC | 64/256/512/1K/2K/4K x18 Low-Voltage Synchronous FIFOs |
| CY7C4225-25ASI | 64/256/512/1K/2K/4K x18 Low-Voltage Synchronous FIFOs |
| CY7C4225-25JC | 64/256/512/1K/2K/4K x18 Low-Voltage Synchronous FIFOs |
相关代理商/技术参数 |
参数描述 |
|---|---|
| CY7C422525AC | 制造商:Cypress Semiconductor 功能描述: |
| CY7C4225-25AC | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| CY7C4225-25JC | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| CY7C4225V-15ASC | 功能描述:IC SYNC FIFO MEM 1KX18 64LQFP RoHS:否 类别:集成电路 (IC) >> 逻辑 - FIFO 系列:CY7C 标准包装:15 系列:74F 功能:异步 存储容量:256（64 x 4） 数据速率:- 访问时间:- 电源电压:4.5 V ~ 5.5 V 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:24-DIP（0.300"，7.62mm） 供应商设备封装:24-PDIP 包装:管件 其它名称:74F433 |
| CY7C4225V-15ASXC | 功能描述:先进先出 1K X18 LO VLTG SYNC 先进先出 COM RoHS:否 制造商:IDT 电路数量: 数据总线宽度:18 bit 总线定向:Unidirectional 存储容量:4 Mbit 定时类型:Synchronous 组织:256 K x 18 最大时钟频率:100 MHz 访问时间:10 ns 电源电压-最大:3.6 V 电源电压-最小:6 V 最大工作电流:35 mA 最大工作温度:+ 85 C 封装 / 箱体:TQFP-80 封装: |
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