參數(shù)資料
型號: EP2C20F256I6N
廠商: ALTERA CORP
元件分類: FPGA
英文描述: FPGA, 1196 CLBS, PBGA256
封裝: LEAD FREE, FBGA-256
文件頁數(shù): 71/168頁
文件大小: 2206K
代理商: EP2C20F256I6N
5–72
Altera Corporation
Cyclone II Device Handbook, Volume 1
February 2008
Duty Cycle Distortion
For DDIO outputs, you can calculate actual half period from the
following equation:
Actual half period = ideal half period – maximum DCD
For example, if the DDR output I/O standard is SSTL-2 Class II, the
maximum DCD for a –5 device is 155 ps (refer to Table 5–57). If the clock
frequency is 167 MHz, the half-clock period T/2 is:
T/2 = 1/(2* f )= 1 /(2*167 MHz) = 3 ns = 3000 ps
1.5-V
280
ps
SSTL-2 Class I
150
190
230
ps
SSTL-2 Class II
155
200
230
ps
SSTL-18 Class I
180
240
260
ps
HSTL-18 Class I
180
235
ps
HSTL-15 Class I
205
220
ps
Differential SSTL-2 Class I
150
190
230
ps
Differential SSTL-2 Class II
155
200
230
ps
Differential SSTL-18 Class I
180
240
260
ps
Differential HSTL-18 Class I
180
235
ps
Differential HSTL-15 Class I
205
220
ps
LVDS
95
110
120
ps
Simple RSDS
100
155
ps
Mini LVDS
95
110
120
ps
PCI
285
305
335
ps
PCI-X
285
305
335
ps
Notes to Table 5–57:
(1)
The DCD specification is characterized using the maximum drive strength
available for each I/O standard.
(2)
Numbers are applicable for commercial, industrial, and automotive devices.
Table 5–57. Maximum for DDIO Output on Row Pins with PLL in the Clock
Path
Notes (1), (2) (Part 2 of 2)
Row Pins with PLL in the Clock Path
C6
C7
C8
Unit
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
EP2C20F256I8 功能描述:FPGA - 現(xiàn)場可編程門陣列 FPGA - Cyclone II 1172 LABs 152 IOs RoHS:否 制造商:Altera Corporation 系列:Cyclone V E 柵極數(shù)量: 邏輯塊數(shù)量:943 內(nèi)嵌式塊RAM - EBR:1956 kbit 輸入/輸出端數(shù)量:128 最大工作頻率:800 MHz 工作電源電壓:1.1 V 最大工作溫度:+ 70 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-256
EP2C20F256I8GA 制造商:Altera Corporation 功能描述:
EP2C20F256I8N 功能描述:FPGA - 現(xiàn)場可編程門陣列 FPGA - Cyclone II 1172 LABs 152 IOs RoHS:否 制造商:Altera Corporation 系列:Cyclone V E 柵極數(shù)量: 邏輯塊數(shù)量:943 內(nèi)嵌式塊RAM - EBR:1956 kbit 輸入/輸出端數(shù)量:128 最大工作頻率:800 MHz 工作電源電壓:1.1 V 最大工作溫度:+ 70 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-256
EP2C20F484C6 功能描述:FPGA - 現(xiàn)場可編程門陣列 FPGA - Cyclone II 1172 LABs 315 IOs RoHS:否 制造商:Altera Corporation 系列:Cyclone V E 柵極數(shù)量: 邏輯塊數(shù)量:943 內(nèi)嵌式塊RAM - EBR:1956 kbit 輸入/輸出端數(shù)量:128 最大工作頻率:800 MHz 工作電源電壓:1.1 V 最大工作溫度:+ 70 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-256
EP2C20F484C6N 功能描述:FPGA - 現(xiàn)場可編程門陣列 FPGA - Cyclone II 1172 LABs 315 IOs RoHS:否 制造商:Altera Corporation 系列:Cyclone V E 柵極數(shù)量: 邏輯塊數(shù)量:943 內(nèi)嵌式塊RAM - EBR:1956 kbit 輸入/輸出端數(shù)量:128 最大工作頻率:800 MHz 工作電源電壓:1.1 V 最大工作溫度:+ 70 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-256