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HY5PS12821LF 数据表(PDF) 11 Page - Hynix Semiconductor

部件名 HY5PS12821LF
功能描述  512Mb DDR2 SDRAM
Download  35 Pages
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制造商  HYNIX [Hynix Semiconductor]
网页  http://www.skhynix.com/kor/main.do
标志 HYNIX - Hynix Semiconductor

HY5PS12821LF 数据表(HTML) 11 Page - Hynix Semiconductor

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Rev. 1.0 / Feb. 2005
11
1HY5PS12421(L)F
HY5PS12821(L)F
HY5PS121621(L)F
3.1 DC Operating Conditions
3.1.1 Recommended DC Operating Conditions (SSTL_1.8)
3.1.2 ODT DC electrical characteristics
Note 1: Test condition for Rtt measurements
Note 2: Optional for DDR2-400/533/667
Measurement Definition for Rtt(eff): Apply VIH (ac) and VIL (ac) to test pin separately, then measure current I(VIH
(ac)) and I( VIL (ac)) respectively. VIH (ac), VIL (ac), and VDDQ values defined in SSTL_18
Measurement Definition for VM : Measurement Voltage at test pin(mid point) with no load.
Symbol
Parameter
Rating
Units
Notes
Min.
Typ.
Max.
VDD
Supply Voltage
1.7
1.8
1.9
V
VDDL
Supply Voltage for DLL
1.7
1.8
1.9
V
4
VDDQ
Supply Voltage for Output
1.7
1.8
1.9
V
4
VREF
Input Reference Voltage
0.49*VDDQ
0.50*VDDQ
0.51*VDDQ
mV
1, 2
VTT
Termination Voltage
VREF-0.04
VREF
VREF+0.04
V
3
There is no specific device VDD supply voltage requirement for SSTL-1.8 compliance. However under all conditions VDDQ must
be less than or equal to VDD.
1. The value of VREF may be selected by the user to provide optimum noise margin in the system. Typically the value of VREF is
expected to be about 0.5 x VDDQ of the transmitting device and VREF is expected to track variations in VDDQ.
2. Peak to peak ac noise on VREF may not exceed +/-2% VREF (dc).
3. VTT of transmitting device must track VREF of receiving device.
4. VDDQ tracks with VDD, VDDL tracks with VDD. AC parameters are measured with VDD, VDDQ and VDDDL tied together
PARAMETER/CONDITION
SYMBOL
MIN
NOM
MAX
UNITS NOTES
Rtt effective impedance value for EMRS(A6,A2)=0,1; 75 ohm
Rtt1(eff)
60
75
90
ohm
1
Rtt effective impedance value for EMRS(A6,A2)=1,0; 150 ohm
Rtt2(eff)
120
150
180
ohm
1
Rtt effective impedance value for EMRS(A6,A2)=1,1; 550 ohm
Rtt2(eff)
40
50
60
ohm
1,2
Deviation of VM with respect to VDDQ/2
delta VM
-6
+6
%
1
delta VM =
2 x Vm
VDDQ
x 100%
- 1
3. AC & DC Operating Conditons
Rtt(eff) =
V
IH (ac) - VIL (ac)
I(V
IH (ac)) - I(VIL (ac))


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