H5PS2562GFRG7C datasheet(11/61 Pages) HYNIX

Part #	H5PS2562GFRG7C

Description	256Mb DDR2 SDRAM

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Manufacturer	HYNIX [Hynix Semiconductor]

Direct Link	http://www.skhynix.com/kor/main.do

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11 / 61 page

Rev.1.3 / June. 2012

11

H5PS2562GFR series

3.2 DC & AC Logic Input Levels

3.2.1 Input DC Logic Level

3.2.2 Input AC Logic Level

3.2.3 AC Input Test Conditions

Note:

1. Input waveform timing is referenced to the input signal crossing through the VREF level applied to the device

under test.

2. The input signal minimum slew rate is to be maintained over the range from VREF to VIH(ac) min for rising

edges and the range from VREF to VIL(ac) max for falling edges as shown in the below figure.

3. AC timings are referenced with input waveforms switching from VIL(ac) to VIH(ac) on the positive transitions

and VIH(ac) to VIL(ac) on the negative transitions.

Symbol

Parameter

Min.

Max.

Units

Notes

VIH(dc)

dc input logic high

VREF + 0.125

VDDQ + 0.3

V

VIL(dc)

dc input logic low

- 0.3

VREF - 0.125

V

Symbol

Parameter

DDR2 400,533

DDR2 667,800

Units

Notes

Min.

Max.

Min.

Max.

VIH (ac)

ac input logic high

VREF +

0.250

-

VREF +

0.200

-V

VIL (ac)

ac input logic low

-

VREF - 0.250

-

VREF - 0.200

V

Symbol

Condition

Value

Units

Notes

VREF

Input reference voltage

0.5 * VDDQ

V1

VSWING(MAX)

Input signal maximum peak to peak swing

1.0

V

1

SLEW

Input signal minimum slew rate

1.0

V/ns

2, 3

VDDQ

VIH(ac) min

VREF

VSWING(MAX)

delta TR

delta TF

VIH(dc) min

VIL(dc) max

VIL(ac) max

VSS

Rising Slew =

delta TR

VIH(ac) min - VREF

VREF - VIL(ac) max

delta TF

Falling Slew =

< Figure : AC Input Test Signal Waveform>

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