K4H281638B-TCB0000 Samsung Semiconductor, K4H281638B-TCB0000 Datasheet - Page 50

• Manufacturer Part Number: K4H281638B-TCB0000
• Manufacturer: Samsung Semiconductor

Specifications of K4H281638B-TCB0000

• Lead Free Status / Rohs Status: Supplier Unconfirmed

128Mb DDR SDRAM
6. Input Setup/Hold Slew Rate Derating
7. I/O Setup/Hold Slew Rate Derating
8. I/O Setup/Hold Plateau Derating
9. I/O Delta Rise/Fall Rate(1/slew-rate) Derating
10. This parameter is fir system simulation purpose. It is guranteed by design.
<Note>
The following table specifies derating values for the specifications listed if the single-ended clock skew rate is less than 1.0V/ns.
This derating table is used to increase t
This derating table is used to increase t
based on the lesser of AC-AC slew rate and DC-DC slew rate.
based on the lesser of AC-AC slew rate and DC-DC slew rate.
This derating table is used to increase tDS/tDH in the case where the input level is flat below VREF 310mV for a duration of
This derating table is used to increase t
up to 2ns.
is calated as 1/SlewRate1-1/SlewRate2. For example, if slew rate 1 = 5V/ns and slew rate 2 =.4V/ns then the Delta Rise/Fall
Rate =-0/5ns/V. Input S/H slew rate based on larger of AC-AC delta rise/fall rate and DC-DC delta rise/fall rate.
Input Setup/Hold Slew Rate
I/O Setup/Hold Slew Rate
(Single ended)
CK slew rate
Delta Rise/Fall Rate
0.75V/ns
1.0V/ns
0.5V/ns
I/O Input Level
(V/ns)
(V/ns)
(ns/V)
(mV)
0.5
0.4
0.3
0.5
0.4
0.3
0.25
0.5
280
0
+100
tIH/tIS
(ps)
+50
0
DS
IS
DS
/t
/t
/t
+100
IH
+150
+100
DH
(ps)
+50
(ps)
+75
(ps)
+50
(ps)
+50
DH
tDS
tDS
tDS
tIS
0
0
0
in the case where the input slew rate is below 0.5V/ns. Input setup/hold slew rate
in the case where the I/O slew rate is below 0.5V/ns. I/O setup/hold slew rate
in the case where the DQ and DQS slew rates differ. The Delta Rise/Fall Rate
tDSS/tDSH
+100
(ps)
+50
0
- 50 -
+100
+150
+100
(ps)
+50
(ps)
+75
(ps)
+50
(ps)
+50
tDH
tDH
tDH
tIH
0
0
0
tAC/tDQSCK
+100
(ps)
+50
0
tLZ(min)
-100
(ps)
-50
0
REV. 1.31 Nov. 3. 2001
tHZ(max)
+100
(ps)
+50
0