W9751G6KB WINBOND [Winbond], W9751G6KB Datasheet - Page 66

• Manufacturer Part Number: W9751G6KB
• Description: 8M ? 4 BANKS ? 16 BIT DDR2 SDRAM
• Manufacturer: WINBOND [Winbond]

AC differential input voltage
AC differential cross point input voltage
AC differential cross point output voltage
9.12 AC Input Test Conditions
Notes:
1. Input waveform timing is referenced to the input signal crossing through the VIH/IL(ac) level applied to the device under test.
2. The input signal minimum slew rate is to be maintained over the range from VREF to VIH(ac) min for rising edges and the
3. AC timings are referenced with input waveforms switching from VIL(ac) to VIH(ac) on the positive transitions and VIH(ac) to
9.13 Differential Input/Output AC Logic Levels
Notes:
1. VID (ac) specifies the input differential voltage |VTR -VCP | required for switching, where VTR is the true input signal (such
2. The typical value of VIX (ac) is expected to be about 0.5 x VDDQ of the transmitting device and VIX (ac) is expected to track
3. The typical value of VOX (ac) is expected to be about 0.5 x VDDQ of the transmitting device and VOX (ac) is expected to
Input reference voltage
Input signal maximum peak to peak swing
Input signal minimum slew rate
V
Falling Slew =
SWING(MAX)
range from VREF to VIL(ac) max for falling edges as shown in the below figure.
VIL(ac) on the negative transitions.
as CLK, LDQS or UDQS) and VCP is the complementary input signal (such as CLK , LDQS or UDQS ). The minimum
value is equal to VIH (ac) - VIL (ac).
variations in VDDQ. VIX (ac) indicates the voltage at which differential input signals must cross.
track variations in VDDQ. VOX (ac) indicates the voltage at which differential output signals must cross.
ΔTF
PARAMETER
V
REF -
Figure 28 – AC input test signal and Differential signal levels waveform
ΔTF
V
CONDITION
IL(ac)
max
Rising Slew =
ΔTR
V
V
V
SYM.
OX (ac)
ID (ac)
IX (ac)
V
IH(ac)
ΔTR
min - V
V
V
V
V
V
V
V
IL(dc)
IL(ac)
DDQ
IH(ac)
IH(dc)
REF
SS
V
V
SLEW
REF
SWING(MAX)
REF
SYMBOL
0.5 x VDDQ - 0.175
0.5 x VDDQ - 0.125
- 66 -
max
max
min
min
MIN.
0.5
V
V
TR
CP
Publication Release Date: Dec. 09, 2011
0.5 x VDDQ + 0.175
0.5 x VDDQ + 0.125
0.5 x V
VALUE
VDDQ + 0.6
1.0
1.0
V
V
V
MAX.
DDQ
SSQ
ID
DDQ
W9751G6KB
V
IX
or V
Crossing point
UNIT
V/nS
OX
UNIT
V
V
V
V
V
Revision A01
NOTES
NOTES
2, 3
1
1
1
2
3