Internet Data Sheet
HYS[64/72]T256020EU-[25F/2.5/3/3S/3.7]-B
Unbuffered DDR2 SDRAM Module
Ball No.
Name Pin
Buffer Function
Type Type
239
SA0
SA1
SA2
I
I
I
CMOS Serial Address Select Bus 2:0
240
CMOS
CMOS
101
Power Supplies
1
VREF
AI
—
—
—
I/O Reference Voltage
EEPROM Power Supply
I/O Driver Power Supply
238
VDDSPD PWR
51,56,62,72,75,,
78,170,175,181,,
191,194
VDDQ
VDD
VSS
PWR
PWR
GND
53,59,64,67,69,,
172,178,184,187,
189,197
—
—
Power Supply
Ground Plane
2,5,8,11,14,17,,
20,23,26,29,32,
35,38,41,44,47,,
50,65,66,79,82,
85,88,91,94,97,,
100,103,106,
109,112,115,118,
121,124,127,,
130,133,136,139,
142,145,148,,
151,154,157,160,
163,166,169,
198,201,204,207,
210,213,216,,
219,222,225,228,
231,234,237
Other Pins
195
77
ODT0
ODT1
I
I
SSTL
SSTL
On-Die Termination Control 0
On-Die Termination Control 1
Note: 2 Rank modules
Not Connected
NC
NC
NC
—
—
Note: 1 Rank modules
Not connected
18,19,55,68,102,1 NC
26,135,147,
156,165,173,203,
212, 224,233
Rev. 1.0, 2006-10
11
10262006-SX8C-DEY8