參數(shù)資料
型號(hào)： K4N51163QC-ZC36
廠商： SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述： 512Mbit gDDR2 SDRAM
中文描述： 512MB的GDDR2 SDRAM的
文件頁(yè)數(shù)： 8/64頁(yè)
文件大?。?/td> 1420K
代理商： K4N51163QC-ZC36
- 8 -
Rev 1.5 Oct. 2005
512M gDDR2 SDRAM
K4N51163QC-ZC
8.4 AC Input Test Conditions
Note :
1. Input waveform timing is referenced to the input signal crossing through the V
IH/IL
(AC)
level applied to the device under test.
2. The input signal minimum slew rate is to be maintained over the range from V
REF
to V
IH
(AC) min for rising edges and the range from V
REF
to V
IL
(AC)
max for falling edges as shown in the below figure.
3. AC timings are referenced with input waveforms switching from V
IL
(AC) to V
IH
(AC) on the positive transitions and V
IH
(AC) to V
IL
(AC) on the negative
transitions.
Symbol
Condition
Value
Units
Note
V
REF
Input reference voltage
0.5 * V
DDQ
V
1
V
SWING(MAX)
Input signal maximum peak to peak swing
1.0
V
1
SLEW
Input signal minimum slew rate
1.0
V/ns
2, 3
V
DDQ
V
IH
(AC) min
V
IH
(DC) min
V
REF
V
IL
(DC) max
V
IL
(AC) max
V
SS
< AC Input Test Signal Waveform >
V
SWING(MAX)
delta TR
delta TF
V
REF
- V
IL
(AC) max
delta TF
Falling Slew =
Rising Slew =
V
IH
(AC) min - V
REF
delta TR
V
DDQ
Crossing point
V
SSQ
V
TR
V
CP
V
ID
V
IX or
V
OX
Note :
1. VID(AC) specifies the input differential voltage |VTR -VCP | required for switching, where VTR is the true input signal (such as CK, DQS, LDQS or
UDQS) and VCP is the complementary input signal (such as CK, DQS, LDQS or UDQS). The minimum value is equal to VIH(AC) - VIL(AC).
2. The typical value of VIX(AC) is expected to be about 0.5 * VDDQ of the transmitting device and VIX(AC) is expected to track variations in VDDQ .
VIX(AC) indicates the voltage at which differential input signals must cross.
Symbol
Parameter
Min.
Max.
Units
Note
V
ID
(AC)
AC differential input voltage
0.5
V
DDQ
+ 0.6
V
1
V
IX
(AC)
AC differential cross point voltage
0.5 * V
DDQ
- 0.175
0.5 * V
DDQ
+ 0.175
V
2
8.5 Differential input AC logic Level
Note :
1. The typical value of VOX(AC) is expected to be about 0.5 * VDDQ of the transmitting device and VOX(AC) is expected to track variations in VDDQ .
VOX(AC) indicates the voltage at which differential output signals must cross.
Symbol
Parameter
Min.
Max.
Units
Note
V
OX
(AC)
AC differential cross point voltage
0.5 * V
DDQ
- 0.125
0.5 * V
DDQ
+ 0.125
V
1
8.6 Differential AC output parameters
< Differential signal levels >
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