NT256D72S89AKGU Nanya Technology, NT256D72S89AKGU Datasheet - Page 9

• Manufacturer Part Number: NT256D72S89AKGU
• Description: 256MB DDR SDRAM DIMM
• Manufacturer: Nanya Technology

NT256D72S89AKGU
256MB : 32M x 72
Low Profile Registered DDR SDRAM DIMM
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
2. Tests for AC timing, I
3. Outputs measured with equivalent load. Refer to the AC Output Load Circuit below.
4. AC timing and I
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
AC Output Load Circuits
AC Operating Conditions
(TA = 0 °C ~ 70 °C; V
1.
2.
3.
4.
REV 1.1
12/2002
Symbol
V
V
V
V
the related specifications and device operation are guaranteed for the full voltage range specified.
to the crossing point for CK, 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
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.
IH (AC)
IL (AC)
ID (AC)
IX (AC)
Input slew rate = 1V/ ns.
Inputs are not recognized as valid until V
V
The value of V
ID
is the magnitude of the difference between the input level on CK and the input level on CK.
Input High (Logic 1) Voltage
Input Low (Logic 0) Voltage
Input Differential Voltage, CK and CK Inputs
Input Differential Pair Cross Point Voltage, CK and CK Inputs
DD
IX
tests may use a V
DDQ
is expected to equal 0.5 x V
DD
Output
V
= 2.5V ± 0.2V; V
, and electrical, AC and DC characteristics, may be conducted at nominal reference/supply voltage levels, but
OUT
SS
.
Parameter/Condition
IL
to V
DD
= 2.5V ± 0.2V, See AC Characteristics)
IH
REF
swing of up to 1.5V in the test environment, but input timing is still referenced to V
DDQ
stabilizes.
of the transmitting device and must track variations in the DC level of the same.
V
50 ohms
9
30 pF
NANYA TECHNOLOGY CORP. reserves the right to change Products and Specifications without notice.
TT
0.5 x V
V
REF
Min
0.7
Timing Reference Point
DDQ
-
+ 0.31
IL (AC)
- 0.2
and V
0.5 x V
V
V
IH (AC)
REF
DDQ
Max
DDQ
-
- 0.31
+ 0.6
unless otherwise specified.
+ 0.2
© NANYA TECHNOLOGY CORP.
Unit
V
V
V
V
1, 2, 3
1, 2, 4
REF
Notes
1, 2
1, 2
(or