參數(shù)資料
型號: V58C2256324SAH-36
廠商: PROMOS TECHNOLOGIES INC
元件分類: DRAM
英文描述: 8M X 32 DDR DRAM, 0.55 ns, PBGA144
封裝: ROHS COMPLIANT, BGA-144
文件頁數(shù): 27/37頁
文件大?。?/td> 370K
代理商: V58C2256324SAH-36
33
V58C2256324SA Rev. 1.4 August 2007
ProMOS TECHNOLOGIES
V58C2256324SA
SSTL_2 Output Buffers
The input voltage provided to the receiver depends on three parameters:
VDDQ and current drive capabilities of the output buffer
Termination voltage
Termination resistance
VDDQ <= VDD
Class II SSTL_2 Output Buffer (Driver)
Capacitance (VDD = 2.5V, TA = 25°C, f = 1MHz)
AC Characteristics
Parameter
Symbol
Min
Max
Unit
Input capacitance (A0~A11, BA0~BA1)
CIN1
2.5
4.5
pF
Input capacitance
( CK, CK, CKE, CS, RAS, CAS, WE )
CIN2
2.5
5.0
pF
Data & DQS input/output capacitance (DQ0~DQ31)
COUT
2.5
5.5
pF
Input capacitance (DM0 ~ DM3)
CIN3
2.5
5.5
pF
Parameter
Sym-
bol
-28
-33
-36
-4A
-4
-5
Unit
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
CK cycle time
CL=3
4.0
5.0
ns
CL=4
3.3
3.6
4.0
5.0
ns
CL=5
2.85
3.3
3.6
4.0
5.0
ns
CK high level width
tCH
0.45
0.55
0.45
0.55
0.45
0.55
0.45
0.55
0.45
0.55
0.45
0.55
tCK
CK low level width
tCL
0.45
0.55
0.45
0.55
0.45
0.55
0.45
0.55
0.45
0.55
0.45
0.55
tCK
DQS out access time from CK
tDQSCK
-0.50
+0.50
-0.50
+0.50
-0.55
+0.55
-0.60
+0.60
-0.60
+0.60
-0.65
+0.65
ns
Output access time from CK
tAC
-0.50
+0.50
-0.50
+0.50
-0.55
+0.55
-0.60
+0.60
-0.60
+0.60
-0.65
+0.65
ns
Data strobe edge to output data edge tDQSQ
-
0. 35
-
0. 4
-
0.4
-
0.4
-
0.4
-
0.4
ns
Data strobe edge to output data edge tQHS
-
0. 30
-
0. 33
-
0.37
-
0.4
-
0.4
-
0.4
ns
Read preamble
tRPRE
0.9
1.1
0.9
1.1
0.9
1.1
0.9
1.1
0.9
1.1
0.9
1.1
tCK
Read postamble
tRPST
0.4
0.6
0.4
0.6
0.4
0.6
0.4
0.6
0.4
0.6
0.4
0.6
tCK
CK to valid DQS-in
tDQSS
0.70
1.15
0.75
1.15
0.75
1.2
0.8
1.2
0.8
1.2
0.8
1.2
tCK
DQS-In setup time
tWPRES
0
-
0
-
0
-
0
-
0
-
0
-
ns
VREF
VIN
VTT = 0.5 *VDDQ
CLOAD = 15pF
VDDQ
VSSQ
VOUT
Receiver
RT=50
Output
Buffer
Parameter
Symbol
Min
Max
Unit
Input capacitance (A0~A11, BA0~BA1)
CIN1
2.5
4.5
pF
Input capacitance
( CK, CK, CKE, CS, RAS, CAS, WE )
CIN2
2.5
5.0
pF
Data & DQS input/output capacitance (DQ0~DQ31)
COUT
2.5
5.5
pF
Input capacitance (DM0 ~ DM3)
CIN3
2.5
5.5
pF
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