HANBit

HDD128M72D18RPW

URL : www.hbe.co.kr

9

HANBit Electronics Co.,Ltd.

REV 1.0 (January. 2005)

System Characteristics for DDR SDRAM

The following specification parameters are required in systems using DDR333, DDR266 devices to ensure proper

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

Table 1 : Input Slew Rate for DQ, DQS, and DM

AC CHARACTERISTICS

DDR333

DDR266

PARAMETER

SYMBOL

MIN

MAX

MIN

MAX

Units

Notes

DQ/DM/DQS input slew rate measured between

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

DCSLEW

TBD

TBD

TBD

TBD

V/ns

a, m

Table 2 : Input Setup & Hold Time Derating for Slew Rate

INPUT SLEW RATE

TIS

TIH

UNITS

NOTES

0.5 V/ns

0

0

ps

i

0.4 V/ns

+50

0

ps

i

0.3 V/ns

+100

0

ps

i

Table 3 : Input/Output Setup & Hold Time Derating for Slew Rate

INPUT SLEW RATE

TDS

TDH

UNITS

NOTES

0.5 V/ns

0

0

ps

k

0.4 V/ns

+75

+75

ps

k

0.3 V/ns

+150

+150

ps

k

Table 4 : Input/Output Setup & Hold Derating for Rise/Fall Delta Slew Rate

DELTA SLEW RATE

TDS

TDH

UNITS

NOTES

+/- 0.0 V/ns

0

0

ps

j

+/- 0.25 V/ns

+50

+50

ps

j

+/- 0.5 V/ns

+100

+100

ps

j

Table 5 : Output Slew Rate Characteristice (X4, X8 Devices only)

SLEW RATE CHARACTERISTIC

TYPICAL RANGE

(V/NS)

MINIMUM

(V/NS)

MAXIMUM

(V/NS)

NOTES

Pullup Slew Rate

1.2 ~ 2.5

1.0

4.5

a,c,d,f,g,h

Pulldown slew

1.2 ~ 2.5

1.0

4.5

b,c,d,f,g,h

Table 6 : Output Slew Rate Characteristice (X16 Devices only)

SLEW RATE CHARACTERISTIC

TYPICAL RANGE

(V/NS)

MINIMUM

(V/NS)

MAXIMUM

(V/NS)

NOTES

Pullup Slew Rate

1.2 ~ 2.5

0.7

5.0

a,c,d,f,g,h

Pulldown slew

1.2 ~ 2.5

0.7

5.0

b,c,d,f,g,h

Table 7 : Output Slew Rate Matching Ratio Characteristics

AC CHARACTERISTICS

DDR333

DDR266

PARAMETER

MIN

MAX

MIN

MAX

Notes

Output Slew Rate Matching Ratio (Pullup to Pulldown)

TBD

TBD

TBD

TBD

e,m