Rev 1.0 / May 2007

26

1

HY5DU12822DF(P) / HY5DU121622DF(P)

SYSTEM CHARACTERISTICS CONDITIONS for DDR SDRAMS

The following tables are described specification parameters that required in systems using DDR devices to ensure

proper performance. These characteristics are for system simulation purposes and are guaranteed by design.

AC CHARACTERISTICS

DDR400

DDR333

DDR266

DDR200

UNIT

Note

PARAMETER

Symbol

min

max

min

max

min

max

min

max

DQ/DM/DQS input slew rate

measured between VIH(DC),

VIL(DC) and VIL(DC), VIH(DC)

DCSLEW

0.5

4.0

0.5

4.0

0.5

4.0

0.5

4.0

V/ns

1,12

Input Slew Rate

Delta tIS

Delta tIH

UNIT

Note

0.5 V/ns

0

0

ps

9

0.4 V/ns

+50

0

ps

9

0.3 V/ns

+100

0

ps

9

Input Slew Rate

Delta tDS

Delta tDH

UNIT

Note

0.5 V/ns

0

0

ps

11

0.4 V/ns

+75

0

ps

11

0.3 V/ns

+150

0

ps

11

Input Slew Rate

Delta tDS

Delta tDH

UNIT

Note

±

0.0 ns/V

00

ps

10

±

0.25 ns/V

+50

+50

ps

10

±

0.5 ns/V

+100

+100

ps

10

Slew Rate Characteristic

Typical Range (V/

ns)

Minimum (V/ns)

Maximum (V/ns)

Note

Pullup Slew Rate

1.2 - 2.5

1.0

4.5

1,3,4,6,7,8

Pulldown Slew Rate

1.2 - 2.5

1.0

4.5

2,3,4,6,7,8

Slew Rate Characteristic

Typical Range (V/

ns)

Minimum (V/ns)

Maximum (V/ns)

Note

Pullup Slew Rate

1.2 - 2.5

1.0

4.5

1,3,4,6,7,8

Pulldown Slew Rate

1.2 - 2.5

1.0

4.5

2,3,4,6,7,8

Slew Rate Characteristic

DDR266A

DDR266B

DDR200

Note

Parameter

min

max

min

max

min

max

Output Slew Rate Matching Ratio

(Pullup to Pulldown)

-

-

-

-

0.71

1.4

5,12