is43dr16128 Integrated Silicon Solution, Inc., is43dr16128 Datasheet - Page 15

• Manufacturer Part Number: is43dr16128
• Description: 2gb X16 Ddr2 Sdram
• Manufacturer: Integrated Silicon Solution, Inc.

IS43/46DR16128
Differential Signal Level Waveform
Differential AC Output Parameters
Note: 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 track variations in VDDQ. VOX(AC)
indicates the voltage at which differential output signals must cross.
Overshoot and Undershoot Specification
AC Overshoot and Undershoot Specification for Address and Control Pins
Note: Please refer to AC Overshoot and Undershoot Definition Diagram.
AC Overshoot and Undershoot Specification for Clock, Data, Strobe and Mask Pins
Note: Please refer to AC Overshoot and Undershoot Definition Diagram.
AC Overshoot and Undershoot Definition Diagram
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. 00B, 3/28/2011
Maximum peak amplitude allowed for undershoot area
Maximum peak amplitude allowed for undershoot area
Maximum peak amplitude allowed for overshoot area
Maximum peak amplitude allowed for overshoot area
VOX(AC)
Symbol
Maximum undershoot area below VSSQ*
Maximum overshoot area above VDDQ*
Maximum undershoot area below VSS
Maximum overshoot area above VDD
Volts
(V)
Parameter
Parameter
AC differential crosspoint voltage
V
V
DD
SS
V
V
CP
TR
/V
/V
Parameter
SSQ
DDQ
*
*
Maximum Amplitude
Maximum Amplitude
V
V
DDR2‐533
DDR2‐533
DDQ
SSQ
V
0.23
0.23
ID
0.5
0.5
0.8
0.8
0.5
0.5
0.5 x VDDQ‐0.125
Time (ns)
Min.
DDR2‐667
DDR2‐667
0.23
0.23
0.5
0.5
0.8
0.8
0.5
0.5
V
IX or
Crossing point
V
Undershoot Area
0.5 x VDDQ+0.125
OX
DDR2‐800
DDR2‐800
Overshoot Area
0.66
0.66
0.23
0.23
0.5
0.5
0.5
0.5
Max.
Unit
V‐ns
V‐ns
Unit
V‐ns
V‐ns
V
V
V
V
Units
V
15