參數(shù)資料
型號(hào)： HY5PS1G831F-E4
廠商： HYNIX SEMICONDUCTOR INC
元件分類： DRAM
英文描述： 1Gb DDR2 SDRAM
中文描述： 128M X 8 DDR DRAM, 0.5 ns, PBGA68
封裝： FBGA-68
文件頁(yè)數(shù)： 13/33頁(yè)
文件大?。?/td> 540K
代理商： HY5PS1G831F-E4
Rev. 1.2 / Dec 2006
13
1
HY5PS1G431(L)F
1
HY5PS1G831(L)F
3.3 Output Buffer Characteristics
3.3.1 Output AC Test Conditions
3.3.2 Output DC Current Drive
3.3.3 OCD defalut characteristics
Note 1: Absolute Specifications (0°C
≤
T
CASE
≤
+tbd°C; VDD = +1.8V ±0.1V, VDDQ = +1.8V ±0.1V)
Note 2: Impedance measurement condition for output source dc current: VDDQ = 1.7V; VOUT = 1420mV;
(VOUT-VDDQ)/Ioh must be less than 23.4 ohms for values of VOUT between VDDQ and VDDQ-280mV.
Impedance measurement condition for output sink dc current: VDDQ = 1.7V; VOUT = 280mV; VOUT/Iol must be less
than 23.4 ohms for values of VOUT between 0V and 280mV.
Note 3: Mismatch is absolute value between pull-up and pull-dn, both are measured at same temperature and voltage.
Note 4: Slew rate measured from vil(ac) to vih(ac).
Symbol
Parameter
SSTL_18 Class II
Units
Notes
V
OTR
Output Timing Measurement Reference Level
0.5 * V
DDQ
V
1
1. The VDDQ of the device under test is referenced.
Symbol
Parameter
SSTl_18
Units
Notes
I
OH(dc)
Output Minimum Source DC Current
- 13.4
mA
1, 3, 4
I
OL(dc)
Output Minimum Sink DC Current
13.4
mA
2, 3, 4
1.
V
DDQ
= 1.7 V; V
OUT
= 1420 mV. (V
OUT
- V
DDQ
)/I
OH
must be less than 21 ohm for values of V
OUT
between V
DDQ
and V
DDQ
- 280
mV.
V
DDQ
= 1.7 V; V
OUT
= 280 mV. V
OUT
/I
OL
must be less than 21 ohm for values of V
OUT
between 0 V and 280 mV.
The dc value of V
REF
applied to the receiving device is set to V
TT
The values of I
OH(dc)
and I
OL(dc)
are based on the conditions given in Notes 1 and 2. They are used to test device drive current
capability to ensure V
IH
min plus a noise margin and V
IL
max minus a noise margin are delivered to an SSTL_18 receiver. The
actual current values are derived by shifting the desired driver operating point (see Section 3.3) along a 21 ohm load line to define
a convenient driver current for measurement.
2.
3.
4.
Description
Parameter
Min
Nom
Max
Unit
Notes
Output impedance
12.6
18
23.4
ohms
1,2
Output impedance step size for OCD cali-
bration
0
1.5
ohms
6
Pull-up and pull-down mismatch
0
4
ohms
1,2,3
Output slew rate
Sout
1.5
-
5
V/ns
1,4,5,6,7,8
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