W971GG6JB-25 Winbond Electronics, W971GG6JB-25 Datasheet - Page 61

• Manufacturer Part Number: W971GG6JB-25
• Description: IC DDR2-800 SDRAM 1GB 84-WBGA
• Manufacturer: Winbond Electronics

Specifications of W971GG6JB-25

• Format - Memory: RAM
• Memory Type: DDR2 SDRAM
• Memory Size: 1G (64M x 16)
• Speed: 2.5ns
• Interface: Parallel
• Voltage - Supply: 1.7 V ~ 1.9 V
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 84-WBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: Q5804012

45. Slew Rate Measurement Levels:
a) Output slew rate for falling and rising edges is measured between VTT - 250 mV and VTT + 250 mV for single ended
b) Input slew rate for single ended signals is measured from VREF(dc) to VIH(ac),min for rising edges and from VREF(dc) to
c) V
46. DDR2 SDRAM output slew rate test load:
Output slew rate is characterized under the test conditions as shown in below figure.
47. Differential data strobe:
DDR2 SDRAM pin timings are specified for either single ended mode or differential mode depending on the setting of the EMRS
“Enable DQS” mode bit; timing advantages of differential mode are realized in system design. The method by which the DDR2
SDRAM pin timings are measured is mode dependent. In single ended mode, timing relationships are measured relative to the
rising or falling edges of DQS crossing at V
cross point of DQS and its complement,
Note that when differential data strobe mode is disabled via the EMRS, the complementary pin,
to VSS through a 20 Ω to 10 kΩ resistor to insure proper operation.
VDDQ
DUT
signals.
For differential signals (e.g. DQS -
= + 500 mV. Output slew rate is guaranteed by design, but is not necessarily tested on each device.
VIL(ac),max for falling edges.
and
For differential signals (e.g. CLK - CLK ) slew rate for rising edges is measured from CLK - CLK = - 250 mV to CLK -
CLK = + 500 mV (+ 250 mV to - 500 mV for falling edges).
ID
is the magnitude of the difference between the input voltage on CLK and the input voltage on CLK , or between DQS
DQS
Output slew rate test load
DQS, DQS
for differential strobe.
DQ
Output
Test point
DQS
DQS
25Ω
REF
) output slew rate is measured between DQS -
. This distinction in timing methods is guaranteed by design and characterization.
. In differential mode, these timing relationships are measured relative to the
VTT = VDDQ/2
- 61 -
Publication Release Date: Mar. 28, 2011
DQS
DQS
= - 500 mV and DQS -
W971GG6JB
, must be tied externally
Revision A07
DQS