is43dr16320b3dbi Integrated Silicon Solution, Inc., is43dr16320b3dbi Datasheet - Page 15

• Manufacturer Part Number: is43dr16320b3dbi
• Description: 512mb X8, X16 Ddr2 Sdram
• Manufacturer: Integrated Silicon Solution, Inc.

IS43/46DR86400B, IS43/46DR16320B
AC and DC Logic Input Levels
Single‐ended DC Input Logic Level
Single‐ended AC Input logic level
Note: Refer to Overshoot and Undershoot Specification for Vpeak value: maximum peak amplitude allowed for overshoot and undershoot.
AC Input Test Conditions
Notes:
1.
2.
3.
AC Input Test Signal Waveform
Differential Input AC logic level
Notes:
1.
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. C, 8/17/2010
Symbol
VREF
VSWING(Max)
SLEW
Input waveform timing is referenced to the input signal crossing through the VIH/IL(AC) level applied to the device under test.
The input signal minimum slew rate is to be maintained over the range from VREF to VIH(AC) min for rising edges and the range from VREF to VIL(AC) max for
falling edges as shown in the below figure.
AC timings are referenced with input waveforms switching from VIL(AC) to VIH(AC) on the positive transitions and VIH(AC) to VIL(AC) on the negative transitions.
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 V IH(AC) ‐ V IL(AC).
VIH(AC)
Symbol
VIL(AC)
Symbol
VIH(AC)
VIL(AC)
VIH(DC)
Symbol
VIL(DC)
V
Falling Slew =
SWING(MAX)
Input signal maximum peak to peak swing
AC input logic HIGH
AC input logic LOW
Input signal minimum slew rate
Parameter
AC input logic HIGH
AC input logic LOW
Input reference voltage
Parameter
DC input logic HIGH
DC input logic LOW
Condition
ΔTF
V
REF
Parameter
- V
ΔTF
IL(ac)
VSSQ ‐ Vpeak
VREF + 0.250
max
Min.
DDR2‐400, DDR2‐533
VSSQ ‐ Vpeak
VREF + 0.250
VDDQ + Vpeak
VREF ‐ 0.250
Min.
VREF + 0.125
Max.
Min.
‐ 0.3
Rising Slew =
ΔTR
0.5 x VDDQ
Value
1.0
1.0
VSSQ ‐ Vpeak
VREF + 0.200
VDDQ + Vpeak
Min.
VREF ‐ 0.250
DDR2‐667, DDR2‐800
VDDQ + 0.3 V
VREF ‐ 0.125
Max.
V
IH(ac)
Max.
V
V
V
V
V
V
V
min - V
ΔTR
DDQ
IH(ac)
IH(dc)
REF
IL(dc)
IL(ac)
SS
VDDQ + Vpeak
VREF ‐ 0.200
Max.
Units
V/ns
max
max
REF
min
min
V
V
Units
V
V
Units
V
V
Notes
2, 3
Notes
Units
1
1
V
V
1
2
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