IS43DR16640A-25DBLI ISSI, Integrated Silicon Solution Inc, IS43DR16640A-25DBLI Datasheet - Page 16

• Manufacturer Part Number: IS43DR16640A-25DBLI
• Manufacturer: ISSI, Integrated Silicon Solution Inc
• Type: DDR2 SDRAMr

Specifications of IS43DR16640A-25DBLI

• Organization: 64Mx16
• Density: 1Gb
• Address Bus: 16b
• Access Time (max): 400ps
• Maximum Clock Rate: 800MHz
• Operating Supply Voltage (typ): 1.8V
• Package Type: FBGA
• Operating Temp Range: -40C to 85C
• Operating Supply Voltage (max): 1.9V
• Operating Supply Voltage (min): 1.7V
• Pin Count: 84
• Mounting: Surface Mount
• Operating Temperature Classification: Industrial
• Lead Free Status / Rohs Status: Compliant

IS43/46DR81280A, IS43/46DR16640A
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. 00D, 8/17/2010
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
/V
TR
/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
16