k4h280438d Samsung Semiconductor, Inc., k4h280438d Datasheet - Page 42

• Manufacturer Part Number: k4h280438d
• Description: 128mb D-die X4/8 Ddr Sdram
• Manufacturer: Samsung Semiconductor, Inc.

128Mb D-die(x4/8) DDR SDRAM
Note 1. VID is the magnitude of the difference between the input level on CK and the input on CK .
8. AC Operating Conditions & Timming Specification
8.1 AC Operating Conditions
8.2 AC Overshoot/Undershoot specification
Input High (Logic 1) Voltage, DQ, DQS and DM signals
Input Low (Logic 0) Voltage, DQ, DQS and DM signals.
Input Differential Voltage, CK and CK inputs
Input Crossing Point Voltage, CK and CK inputs
8.2.1 Overshoot/Undershoot specification for Address and Control Pins
Parameter
Maximum peak amplitude allowed for overshoot (See Figure 1):
Maximum peak amplitude allowed for undershoot (See Figure 1):
The area between the overshoot signal and VDD must be less than or
equal to (See Figure 1):
The area between the undershoot signal and GND must be less than or
equal to (See Figure 1):
2. The value of V
3. These parameters should be tested at the pim on actual components and may be checked at either the pin or the pad in simula-
tion. the AC and DC input specificatims are refation to a Vref envelope that has been bandwidth limited 20MHz.
Table 14. Overshoot/Undershoot specification for Address and Control Pins
Notes:
1. This specification is intended for only DDR200, DDR266A and DDR266B devices.
2. This specification is intended for only devices with NO clamp protection
3. This compliance is to be verified by design only.
The specification for DDR333 will be updated.
Parameter/Condition
IX
is expected to equal 0.5*V
-1
-2
-3
-4
-5
Figure 24. AC overshoot/Undershoot Definition
5
4
3
2
1
0
Maximum Amplitude = 1.6V
0
Area = 4.5V-ns
0.5
0.6875
VDD
1.0
Table 13. AC operating conditions
Overshoot
1.5
2.0
DDQ
2.5
of the transmitting device and must track variations in the DC level of the same.
3.0
Tims(ns)
3.5
- 42 -
4.0
4.5
Symbol
VIH(AC)
VIL(AC)
VID(AC)
VIX(AC)
5.0
Maximum Amplitude = 1.6V
5.5
undershoot
GND
6.0
6.3125
VREF + 0.31
0.7
0.5*VDDQ-0.2
Specification
1.6 V
1.6 V
4.5 V-ns
4.5 V-ns
6.5
Min
7.0
REV. 0.3 Jan.31. 2001
0.5*VDDQ+0.2
VREF - 0.31
VDDQ+0.6
Notes
1,2,3
1,2,3
1,2,3
1,2,3
Max
Unit
V
V
V
V
Note
3
3
1
2