DDR Module Comparison

Table 1. DDR DRAM Module Features

Feature	DDR3/DDR3L	LPDDR2	LPDDR3
Core voltage VDD (mV)	1500, 1350	1200, 1800	1200, 1800
I/O voltage VDDQ/CA (mV)	1500, 1350	1200	1200
VREF DQ (mV)	750, 675	600	600
VREF CA (mV)	750, 675	600	600
Maximum frequency (DDR controller)	533 Mhz, DDR1066	533 Mhz, DDR1066	533 Mhz, DDR1066
Burst lengths	4, 8	4, 8, 16	8
Configuration	x8, x16	x16, x32	x16, x32
Address commands signals	27 Pins	14 Pins	15 Pins
CA bus data rate	Single	Double	Double
DQ bus data rate	Double	Double	Double
Output drive strength (Ω)	34.3, 40	34.3, 40, 48, 60, 80, 120	34.3, 40, 48
CA training	–	–
Write leveling		–
Read leveling
Pre-bank refresh
Output driver	SSTL_15, SSTL135	SSTL_12	SSTL_12
ODT		–
Package option	Discrete	Discrete	Discrete