Datasheet
M2U1G64DS8HB1G / M2U51264DS88B1G / M2U25664DSH4B1G
M2Y1G64DS8HB1G / M2Y51264DS88B1G / M2Y25664DSH4B1G (Green)
1GB, 512MB and 256MB
PC3200 and PC2700
Unbuffered DDR DIMM
REV 1.2 12
June 2, 2006
.
AC Characteristics
Notes 1-5 apply to the following Tables; Electrical Characteristics and DC Operating Conditions, AC Operating
Conditions, Operating, Standby, and Refresh Currents, and Electrical Characteristics and AC Timing.)
1. All voltages referenced to V
SS
.
2. Tests for AC timing, IDD, and electrical, AC and DC characteristics, may be conducted at nominal reference/supply voltage levels, but the
related specifications and device operation are guaranteed for the full voltage range specified.
3. Outputs measured with equivalent load. Refer to the AC Output Load Circuit below.
4. AC timing and IDD tests may use a V
IL
to V
IH
swing of up to 1.5V in the test environment, but input timing is still referenced to V
REF
(or to the
crossing point for CK, ), and parameter specifications are guaranteed for the specified AC input levels under normal use conditions. The
minimum slew rate for the input signals is 1V/ns in the range between V
IL (AC)
and V
IH (AC)
unless otherwise specified.
5. The AC and DC input level specifications are as defined in the SSTL_2 Standard (i.e. the receiver effectively switches as a result of the signal
crossing the AC input level, and remains in that state as long as the signal does not ring back above (below) the DC input LOW (HIGH) level.
AC Output Load Circuits
Timing Reference Point
V
TT
50 ohms
30 pF
Output
V
OUT
AC Operating Conditions
Symbol
Parameter/Condition Min Max Unit Notes
V
IH (AC)
Input High (Logic 1) Voltage. V
REF
+ 0.31 V 1, 2
V
IL (AC)
Input Low (Logic 0) Voltage. V
REF
- 0.31 V 1, 2
V
ID (AC)
Input Differential Voltage, CK and Inputs 0.62 V
DDQ
+ 0.6 V 1, 2, 3
V
IX (AC)
Input Differential Pair Cross Point Voltage, CK and Inputs (0.5* V
DDQ
) - 0.2
(0.5* V
DDQ
) + 0.2
V 1, 2, 4
1. Input slew rate = 1V/ ns.
2. Inputs are not recognized as valid until V
REF
stabilizes.
3. V
ID
is the magnitude of the difference between the input level on CK and the input level on .
4. The value of V
IX
is expected to equal 0.5*V
DDQ
of the transmitting device and must track variations in the DC level of the same.