参数资料
型号: ADSP-21469KBCZ-3
厂商: Analog Devices Inc
文件页数: 55/72页
文件大小: 0K
描述: IC DSP 32/40BIT 400MHZ 324BGA
产品变化通告: Pin Function Change 08/Mar/2012
标准包装: 1
系列: SHARC®
类型: 浮点
接口: DAI,DPI,EBI/EMI,I²C,SCI,SPI,SSP,UART/USART
时钟速率: 400MHz
非易失内存: 外部
芯片上RAM: 5Mb
电压 - 输入/输出: 3.30V
电压 - 核心: 1.05V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 324-BGA,CSPBGA
供应商设备封装: 324-CSPBGA
包装: 托盘
ADSP-21469
Rev. 0
|
Page 59 of 72
|
June 2010
CAPACITIVE LOADING
Output delays and holds are based on standard capacitive loads:
30 pF on all pins (see Table 55). Figure 52 through Figure 57
show graphically how output delays and holds vary with load
capacitance. The graphs of Figure 48 through Figure 57 may not
be linear outside the ranges shown for Typical Output Delay vs.
Load Capacitance and Typical Output Rise Time (20% to 80%,
V = Min) vs. Load Capacitance.
Figure 47. Output Buffer Characteristics (Worst-Case DDR2)
Figure 48. Typical Output Rise/Fall Time Non-DDR2
(20% to 80%, VDD_EXT = Max)
SWEEP (V
DDEXT) VOLTAGE (V)
0
30
50
SOURCE
(V
DDEXT
)CURRENT
(mA)
40
20
-50
V
OH 3.13 V, 125 °C
V
OL 3.13 V, 125 °C
10
-30
-40
-20
-10
1.5
0.5
1.0
TYPE C & D, HALF DRIVE
TYPE C & D, FULL DRIVE
TYPE C & D, HALF DRIVE
TYPE C & D, FULL DRIVE
LOAD CAPACITANCE (pF)
6
0
7
4
2
1
3
RISE
AND
FALL
TIMES
(ns)
125
200
100
25
175
50
75
150
5
y = 0.0342x + 0.309
y = 0.0153x + 0.2131
y = 0.0413x + 0.2651
y = 0.0152x + 0.1882
TYPE A DRIVE FALL
TYPE A DRIVE RISE
TYPE B DRIVE FALL
TYPE B DRIVE RISE
Figure 49. Typical Output Rise/Fall Time Non-DDR2
(20% to 80%, VDD_EXT = Min)
Figure 50. Typical Output Rise/Fall Time DDR2
(20% to 80%, VDD_EXT = Max)
LOAD CAPACITANCE (pF)
6
0
10
4
2
RISE
AND
FALL
TIMES
(ns)
25
200
150
50
75
100
125
175
y = 0.0746x + 0.5146
y = 0.0572x + 0.5571
y = 0.0278x + 0.3138
y = 0.0258x + 0.3684
TYPE A FALL
TYPE A RISE
TYPE B RISE
TYPE B FALL
8
12
14
LOAD CAPACITANCE (pF)
0.6
0
0.7
0.4
0.2
0.1
0.3
RISE
AND
FALL
TIMES
(ns)
0.5
y = 0.0058x + 0.2113
y = 0.0217x + 0.26
y = 0.0198x + 0.2304
y = 0.0061x + 0.207
05
40
30
10
15
20
25
35
TYPE C & D HALF DRIVE FALL
0.8
0.9
1.0
TYPE C & D HALF DRIVE RISE
TYPE C & D FULL DRIVE RISE
TYPE C & D FULL DRIVE FALL
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