HY5PS1G421LM HYNIX [Hynix Semiconductor], HY5PS1G421LM Datasheet - Page 59

• Manufacturer Part Number: HY5PS1G421LM
• Description: 1Gb DDR2 SDRAM(DDP)
• Manufacturer: HYNIX [Hynix Semiconductor]

Rev. 0.2 / Oct. 2005
5. AC & DC Operating Conditons
5.1 DC Operation Conditions
5.1.1 Recommended DC Operating Conditions (SSTL_1.8)
5.1.2 ODT DC electrical characteristics
Note 1: Test condition for Rtt measurements
(ac)) and I( V
Rtt effective impedance value for EMRS(A6,A2)=0,1; 75 ohm
Rtt effective impedance value for EMRS(A6,A2)=1,0; 150 ohm
Deviation of V
Measurement Definition for VM : Measurement Voltage at test pin(mid point) with no load.
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
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
Measurement Definition for Rtt(eff):
Symbol
VDDQ
VDDL
VREF
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.
expected to be about 0.5 x VDDQ of the transmitting device and VREF is expected to track variations in VDDQ.
VDD
VTT
IL
M
Supply Voltage
Supply Voltage for DLL
Supply Voltage for Output
Input Reference Voltage
Termination Voltage
(ac)) respectively. V
with respect to VDDQ/2
Rtt(eff) =
PARAMETER/CONDITION
Parameter
I(
V
V
IH
IH
(ac)
IH
(ac)
(ac), V
) - I(
-
delta VM =
V
IL
V
Apply V
(ac)
IL
IL
(ac)
0.49*VDDQ
V
(ac), and VDDQ values defined in SSTL_18
REF
)
Min.
1.7
1.7
1.7
IH
-0.04
(ac) and V
2 x Vm
VDDQ
0.50*VDDQ
Rating
IL
V
Typ.
1.8
1.8
1.8
REF
- 1
(ac) to test pin separately, then measure current I(V
delta VM
Rtt1(eff)
Rtt2(eff)
x 100%
SYMBOL
0.51*VDDQ
V
REF
Max.
1.9
1.9
1.9
+0.04
-3.75
120
MIN
60
1HY5PS12421(L)M
NOM
150
HY5PS12821(L)M
75
Units
mV
+3.75
V
V
V
V
MAX
180
90
UNITS NOTES
ohm
ohm
%
Notes
1, 2
4
4
3
1
1
1
59
IH