NT5TU64M8EE datasheet(53/96 Pages) NANYA

Part #	NT5TU64M8EE

Description	DDR2 512Mb SDRAM

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Manufacturer	NANYA [Nanya Technology Corporation.]

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DDR2 512Mb SDRAM

NT5TU64M8EE / NT5TU32M16EG

53

Version 1.0

Nanya Technology Corp.©

09/2014

AC & DC Operating Conditions

DC Operating Conditions

Recommended DC Operating Conditions (SSTL_1.8)

Symbol

Parameter

Rating

Units

Notes

Min

Typ

Max

VDD

Supply Voltage

1.7

1.8

1.9

V

1

VDDDL

Supply Voltage for DLL

1.7

1.8

1.9

V

5

VDDQ

Supply Voltage for Output

1.7

1.8

1.9

V

1,5

VREF

Input Reference Voltage

0.49 * VDDQ

0.5 * VDDQ

0.51 * VDDQ

V

2, 3

VTT

Termination Voltage

VREF - 0.04

VREF

VREF + 0.04

V

4

Notes:

1. There is no specific device VDD supply voltage requirement for SSTL_18 compliance. However under all conditions VDDQ must be less

than or equal to VDD.

2. The value of VREF may be selected by the user to provide optimum noise margin in the system. Typically the value of VREF is expected to

be about 0.5 x VDDQ of the transmitting device and VREF is expected to track variations in VDDQ.

3.

Peak to peak ac noise on VREF may not exceed +/- 2% VREF (dc).

4.

VTT is not applied directly to the device. VTT is a system supply for signal termination resistors is expected to be set equal to VREF and

must track variations in die dc level of VREF.

5.

VDDQ tracks with VDD, VDDL tracks with VDD. AC parameters are measured with VDD, VDDQ, and VDDL tied together.

ODT DC Electrical Characteristic

Parameter / Condition

Symbol

Min

Nom

Max

Units

Notes

Rtt eff. impedance value for EMRS(1)(A6,A2)=0,1; 75Ω

Rtt1(eff)

60

75

90

Ω

1

Rtt eff. impedance value for EMRS(1)(A6,A2)=1,0; 150Ω

Rtt2(eff)

120

150

180

Ω

1

Rtt eff. impedance value for EMRS(1)(A6,A2)=1,1; 50Ω

Rtt3(eff)

40

50

60

Ω

1

Deviation of VM with respect to VDDQ / 2

delta VM

- 6

+ 6

%

2

Notes:

1.

Measurement Definition for Rtt(eff):

2. Measurement Definition for VM:

VIH (ac)

- VIL (ac)

I(VIH (ac)) - I(VIL (ac))

Rtt(eff) =

ΔVM = (

- 1 )

x

100%

2 x Vm

VDDQ

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