NEW PRODUCT BRIEF
Product Databrief
PI3DDR4212
Description
1.8V/ 2.5V/ 3.3V 12 bit 2:1 DDR3/DDR4 Switch
Features
12 bit 2:1 switch that supports DDR3 800 2133Mbps,
DDR4 1600~4266 Mbps
VDD 1.8V/ 2.5V/ 3.3V
Flow through pinout option for easy layout
SEL and Global Enable
High impedance and low Coff channel output when
disabled or deselected
Low RON: 7
typical
3dB Bandwidth: 6GHz (typical)
Low insertion loss: -1db @ 2GHz typical
Low return loss: -24db @ 2GHz typical
Low cross-talk for high speed channels:
-19db @ 2GHz typical
Low off-isolation: -20db @ 2GHz typical
Low Propagation Delay: 70ps Typ
Low bit-to-bit skew 8ps Max across 6 Bits
ESD: 2KV HBM
POD_12, SSTL_12 & SSTL_15 signaling
Packaging (Pb-free and Green)
48 pin TFBGA (3x8x1mm)pin compatible with
CBTV24DD12
Application Diagram
This 12-bit DDR3/DDR4 switch is designed for 1.8V/ 2.5V/
3.3V supply voltage, POD_12, SSTL_12 and SSTL_15 signal-
ing and CMOS select input signals. It is designed for DDR3 or
DDR4 memory bus with speed up to 5Gbps. It supports DDR4
1600~4266 Mbps transfer rate.
PI3DDR4212 has a 1:2 demux or 2:1 mux topology. All 2-bit
channels can be switched to one of the two ports simultane-
ously with the SEL input. This device also allows all ports to be
disconnected.
PI3DDR4212 uses Pericom’s proprietary high speed switch
technology providing consistent high bandwidth across all
channels, with very little insertion loss, cross-talk, and bit to
bit skew.
It is available in 48-pin TFBGA 3x8x1mm package. The 48-
pin version is pin compatible with CBTU24DD2/CBTV24DD2.
Applications
DDR4 Memory Bus System
NVDIMM Module
Flash Memory Array sub system
High Speed multiplexing
Block Diagram
V
DD
SEL[0:1]
EN
Nand Flash
12 Switches/ module
DDR3/4
DRAM
Host DRAM
Interface
PI3DDR4212
PI3DDR4212
B[0:11]
host side B
12-bit
2 : 1 MUX/switch
NAND
Flash
Ctlr
A[0:11]
DRAM side
DMA
DRAM
Ctlr
XO
LDO
Local Processor
ASIC
DIMM
Power-Fail
Sideband
Comm
Channel
C[0:11]
host side C
GND
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