參數(shù)資料
型號: K4H511638D-TLA0
廠商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: 128Mb DDR SDRAM
中文描述: 128MB DDR SDRAM的
文件頁數(shù): 21/24頁
文件大?。?/td> 367K
代理商: K4H511638D-TLA0
Rev. 1.1 June. 2005
DDR SDRAM
DDR SDRAM 512Mb C-die (x4, x8, x16)
Figure 3. I/V characteristics for input/output buffers:Pull up(above) and pull down(below)
Maximum
Typical High
Minumum
Typical Low
Vout(V)
I
-220
-200
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
0.0
1.0
2.0
Minimum
Typical Low
Typical High
Maximum
0
20
40
60
80
100
120
140
160
0.0
0.5
1.0
1.5
2.0
2.5
I
Vout(V)
Pullup Characteristics for Full Strength Output Driver
Pulldown Characteristics for Full Strength Output Driver
DDR SDRAM Output Driver V-I Characteristics
DDR SDRAM Output driver characteristics are defined for full and half strength operation as selected by the EMRS bit A1.
Figures 3 and 4 show the driver characteristics graphically, and tables 8 and 9 show the same data in tabular format suitable for input
into simulation tools. The driver characteristcs evaluation conditions are:
Typical
25×C
Vdd/Vddq = 2.5V, typical process
Minimum
70×C
Vdd/Vddq = 2.3V, slow-slow process
Maximum
0×C
Vdd/Vddq = 2.7V, fast-fast process
Output Driver Characteristic Curves Notes:
1. The full variation in driver current from minimum to maximum process, temperature and voltage will lie within the outer bounding lines
the of the V-I curve of Figure 3 and 4.
2. It is recommended that the "typical" IBIS V-I curve lie within the inner bounding lines of the V-I curves of Figure 3 and 4.
3. The full variation in the ratio of the "typical" IBIS pullup to "typical" IBIS pulldown current should be unity
+/-
10%, for device drain to
source voltages from 0.1 to1.0. This specification is a design objective only. It is not guaranteed.
23.0 IBIS : I/V Characteristics for Input and Output Buffers
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