English
Language : 

PLL103-03 Datasheet, PDF (1/7 Pages) PhaseLink Corporation – DDR SDRAM Buffer with 4 DDR or 3 SDR/2 DDR DIMMS
Preliminary PLL103-03
DDR SDRAM Buffer with 4 DDR or 3 SDR/2 DDR DIMMS
FEATURES
• Generates 24-output buffers from one input.
• Supports up to 4 DDR DIMMS or 3 SDR DIMMS
and 2 DDR DIMMS.
• Supports 266MHz DDR SDRAM.
• One additional output for feedback.
• Less than 5ns delay.
• Skew between any outputs is less than 100 ps.
• 2.5V or 3.3V Supply range.
• Enhanced DDR and SDRAM Output Drive
selected by I2C.
• Available in 48 pin SSOP.
BLOCK DIAGRAM
SDATA
SCLK
I2C
Control
BUF_IN
PD#
DDR0T_SDRAM10
DDR0C_SDRAM11
DDR1T_SDRAM0
DDR1C_SDRAM1
DDR2T_SDRAM2
DDR2C_SDRAM3
DDR3T_SDRAM4
DDR3C_SDRAM5
DDR4T_SDRAM6
DDR4C_SDRAM7
DDR5T_SDRAM8
DDR5C_SDRAM9
DDR6T
DDR6C
DDR7T
DDR7C
DDR8T
DDR8C
DDR9T
DDR9C
DDR10T
DDR10C
DDR11T
DDR11C
FBOUT
PIN CONFIGURATION
FBOUT
1
VDD3.3_2.5
2
GND
3
DDR0T_SDRAM10
4
DDR0C_SDRAM11 5
DDR1T_SDRAM0
6
DDR1C_SDRAM1
7
VDD3.3_2.5
8
GND
9
DDR2T_SDRAM2
10
DDR2C_SDRAM3 11
VDD3.3_2.5
12
BUF_IN
13
GND
14
DDR3T_SDRAM4
15
DDR3C_SDRAM5 16
VDD3.3_2.5
17
GND
18
DDR4T_SDRAM6
19
DDR4C_SDRAM7
20
DDR5T_SDRAM8
21
DDR5C_SDRAM9
22
VDD3.3_2.5
23
SDATA
24
Note: #: Active Low
48
SEL_DDR
47
VDD2.5
46
GND
45
DDR11T
44
DDR11C
43
DDR10T
42
DDR10C
41
VDD2.5
40
GND
39
DDR9T
38
DDR9C
37
VDD2.5
36
PD#
35
GND
34
DDR8T
33
DDR8C
32
VDD2.5
31
GND
30
DDR7T
29
DDR7C
28
DDR6T
27
DDR6C
26
GND
25
SCLK
DESCRIPTIONS
The PLL103-03 is designed as a 3.3V/2.5V buffer to
distribute high-speed clocks in PC applications. The
device has 24 outputs. These outputs can be
configured to support four unbuffered DDR (Double
Data Rate) DIMMS or to support 2 unbuffered
standard SDR (Single Data Rate) DIMMS and 2 DDR
DIMMS. The PLL103-03 can be used in conjunction
with the PLL202-04 or similar clock synthesizer for
the VIA Pro 266 chipset.
The PLL103-03 also has an I2C interface, which can
enable or disable each output clock. When power up,
all output clocks are enabled (has internal pull up).
47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991
Rev 08/28/00 Page 1
 ▷