k4d261638f Samsung Semiconductor, Inc., k4d261638f Datasheet - Page 12

• Manufacturer Part Number: k4d261638f
• Description: 128mbit Gddr Sdram
• Manufacturer: Samsung Semiconductor, Inc.

DECOUPLING CAPACITANCE GUIDE LINE
AC OPERATING TEST CONDITIONS
CAPACITANCE
Recommended decoupling capacitance added to power line at board.
Note :
1.For the K4D261638F-TC25/2A, VDD & VDDQ = 2.8V+0.1V.
K4D261638F
Decoupling Capacitance between V
Decoupling Capacitance between V
Input reference voltage for CK(for single ended)
CK and CK signal maximum peak swing
CK signal minimum slew rate
Input Levels(V
Input timing measurement reference level
Output timing measurement reference level
Output load condition
Input capacitance( CK, CK )
Input capacitance(A
Input capacitance
( CKE, CS, RAS,CAS, WE )
Data & DQS input/output capacitance(DQ
Input capacitance(DM0 ~ DM3)
1. V
2. V
All V
All V
DD
SS
Parameter
and V
DD
SS
and V
pins are connected in chip. All V
pins are connected in chip. All V
IH
SSQ
DDQ
/V
0
Parameter
IL
~A
pins are separated each other
Parameter
pins are separated each other.
)
(V
11
DD
, BA
Output
=2.5V, T
0
~BA
DD
DDQ
1
)
and V
A
and V
= 25qC, f=1MHz)
0
~DQ
SS
SSQ
SSQ
DDQ
15
)
pins are connected in chip.
pins are connected in chip.
(Fig. 1) Output Load Circuit
(V
Z0=50:
DD
- 12 -
=2.5Vr5%, T
Symbol
C
C
LOAD
C
C
C
C
OUT
IN1
IN2
IN3
IN4
V
REF
=30pF
Symbol
C
C
+0.35/V
0.50*V
See Fig.1
DC1
DC2
Value
V
A
V
1.5
1.0
V
= 0 to 65qC)
REF
tt
tt
=0.5*V
DDQ
R
REF
T
=50:
Min
1.0
1.0
1.0
1.0
1.0
-0.35
DDQ
V
=0.5*V
REF
0.1 + 0.01
0.1 + 0.01
128M GDDR SDRAM
Value
DDQ
Max
5.0
4.0
4.0
6.5
6.5
Rev. 1.2 (Jan. 2004)
V/ns
Unit
V
V
V
V
V
Unit
uF
uF
Unit
pF
pF
pF
pF
pF
Note