Samsung M471B1G73AH0 Vref Tolerances, Illustration of Vrefdc tolerance and Vref ac-noise limits

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Unbuffered SODIMM

datasheet

Rev. 1.0

DDR3 SDRAM

10.2 VREF Tolerances.

The dc-tolerance limits and ac-noise limits for the reference voltages VREFCA and VREFDQ are illustrate in Figure 1. It shows a valid reference voltage VREF(t) as a function of time. (VREF stands for VREFCA and VREFDQ likewise).

VREF(DC) is the linear average of VREF(t) over a very long period of time (e.g. 1 sec). This average has to meet the min/max requirements of VREF. Fur- thermore VREF(t) may temporarily deviate from VREF(DC) by no more than ± 1% VDD.

voltage

VDD

VSS

time

Figure 1. Illustration of VREF(DC) tolerance and VREF ac-noise limits

The voltage levels for setup and hold time measurements VIH(AC), VIH(DC), VIL(AC) and VIL(DC) are dependent on VREF.

"VREF" shall be understood as VREF(DC), as defined in Figure 1.

This clarifies, that dc-variations of VREF affect the absolute voltage a signal has to reach to achieve a valid high or low level and therefore the time to which setup and hold is measured. System timing and voltage budgets need to account for VREF(DC) deviations from the optimum position within the data-eye of the input signals.

This also clarifies that the DRAM setup/hold specification and derating values need to include time and voltage associated with VREF ac-noise.

Timing and voltage effects due to ac-noise on VREF up to the specified limit (+/-1% of VDD) are included in DRAM timings and their associated deratings.

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Contents Datasheet First Release Jul Kim RevHistory Table Of Contents DDR3 Unbuffered Sodimm Ordering Information Key FeaturesAddress Configuration Pin Front Back X64 Dimm Pin Configurations Front side/Back SidePin Name Description Number Pin DescriptionInput/Output Functional Description Symbol Type Function8GB, 1Gx64 Module Populated as 2 ranks of x8 DDR3 SDRAMs Function Block DiagramAbsolute Maximum DC Ratings Dram Component Operating Temperature RangeAbsolute Maximum Ratings AC & DC Operating ConditionsAC & DC Input Measurement Levels 10.1 AC & DC Logic Input Levels for Single-ended SignalsIllustration of Vrefdc tolerance and Vref ac-noise limits Vref Tolerances+0.2 AC and DC Logic Input Levels for Differential SignalsDifferential Signals Definition Symbol Parameter DDR3-800/1066/1333/1600 UnitTime Single-ended Requirements for Differential SignalsParameter DDR3-800/1066/1333/1600 Unit Min Max Slew Rate Definition for Single Ended Input SignalsSlew rate definition for Differential Input Signals Differential Input Cross Point VoltageSingle-ended Output Slew Rate AC & DC Output Measurement LevelsSingle Ended AC and DC Output Levels Differential AC and DC Output LevelsDelta TFdiff Differential Output Slew RateDifferential output slew rate for rising edge Delta TRdiff Differential output slew rate for falling edgeSymbol Description Dimm IDD specification definitionDatasheet M471B1G73AH0 8GB 1Gx64 Module IDD Spec TableDDR3-1066 DDR3-1333 Input/Output Capacitance14.1 2Rx8 2GB Sodimm M471B1G73AH0 ParameterRefresh Parameters by Device Density Electrical Characteristics and AC timingDDR3-1066 Speed Bins CL-nRCD-nRP DDR3-1333 CL-nRCD-nRP DDR3-1333 Speed BinsDDR3-1600 Speed Bins CL-nRCD-nRP Speed Bin Table Notes Absolute Specification Toper Vddq = VDD = 1.5V +/- 0.075Timing Parameters by Speed Bin Timing Parameters by Speed GradeReset Timing MIN MAX Jitter Notes X 1 + 0.15 x 15 = 0.133 ~~ 128ms Timing Parameter NotesZQCorrection TSens x Tdriftrate + VSens x Vdriftrate 17.1 512Mx8 based 1Gx64 Module 2 Ranks M471B1G73AH0 Physical Dimensions

M471B1G73AH0 specifications

The Samsung M471B1G73AH0 is a high-performance DDR4 SO-DIMM memory module designed for laptops and compact systems. This specific RAM chip showcases a balance of speed, efficiency, and reliability, making it an ideal choice for both everyday users and professionals seeking enhanced system performance.

One of the main features of the M471B1G73AH0 is its capacity. With 8GB of memory, it provides ample space for multitasking, allowing users to run multiple applications simultaneously without experiencing slowdowns. This is particularly beneficial for users who require a robust performance for tasks such as video editing, gaming, or running virtual machines.

The module operates at a frequency of 2400 MHz, tapping into the capabilities of DDR4 technology. This frequency ensures that data can be transferred quickly, enhancing overall system responsiveness. The DDR4 specification also brings improvements in power efficiency compared to its predecessor, DDR3, resulting in lower energy consumption and prolonged battery life in portable devices.

Another notable aspect of the M471B1G73AH0 is its latency. With a CAS latency of CL17, this module strikes a good balance between speed and response time, ensuring that data retrieval and execution are efficient, which is crucial for both applications and system processes.

Samsung’s advanced manufacturing technology is evident in this module, which employs 20nm process technology to produce high-density chips. This not only contributes to lower power consumption but also results in a smaller physical footprint, allowing for increased memory density in compact devices.

In terms of compatibility, the M471B1G73AH0 is designed to support a wide range of platforms. It adheres to the standard SO-DIMM form factor, making it compatible with most laptops and all-in-one systems. This versatility allows users to easily upgrade their existing systems for enhanced performance.

Additionally, the module includes features such as ECC (Error-Correcting Code) capabilities for certain variants, which helps in identifying and correcting memory errors, thereby increasing system reliability—an essential aspect for critical applications.

In conclusion, the Samsung M471B1G73AH0 is a robust DDR4 memory solution that delivers solid performance and reliability. With its 8GB capacity, 2400 MHz frequency, and energy-efficient design, it is suitable for a wide range of computing needs, making it a popular choice among users looking to upgrade their systems for improved efficiency and responsiveness.
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