參數(shù)資料
型號: HYS72T256020HU-3.7-A
廠商: QIMONDA AG
元件分類: DRAM
英文描述: 240-Pin Unbuffered DDR2 SDRAM Modules
中文描述: 256M X 72 DDR DRAM MODULE, 0.5 ns, DMA240
封裝: GREEN, DIMM-240
文件頁數(shù): 32/61頁
文件大?。?/td> 1365K
代理商: HYS72T256020HU-3.7-A
Internet Data Sheet
Rev. 1.32, 2006-09
03062006-5RK8-1X8J
32
HYS[64/72]T256xxxHU–[3/…/5]–A
Unbuffered DDR2 SDRAM Modules
3.3.3
ODT AC Electrical Characteristics
TABLE 20
ODT AC Characteristics and Operating Conditions for DDR2-667
TABLE 21
ODT AC Characteristics and Operating Conditions for DDR2-533 & DDR2-400
Symbol
Parameter / Condition
Values
Unit
Note
Min.
Max.
t
AOND
t
AON
t
AONPD
t
AOFD
t
AOF
t
AOFPD
t
ANPD
t
AXPD
ODT turn-on delay
ODT turn-on
ODT turn-on (Power-Down Modes)
ODT turn-off delay
ODT turn-off
ODT turn-off (Power-Down Modes)
ODT to Power Down Mode Entry Latency
ODT Power Down Exit Latency
2
t
AC.MIN
t
AC.MIN
+ 2 ns
2.5
t
AC.MIN
t
AC.MIN
+ 2 ns
3
8
2
t
AC.MAX
+ 0.7 ns
2
t
CK +
t
AC.MAX
+ 1 ns
2.5
t
AC.MAX
+ 0.6 ns
2.5
t
CK +
t
AC.MAX
+ 1 ns
t
CK
ns
ns
t
CK
ns
ns
t
CK
t
CK
1)
1) ODT turn on time min. is when the device leaves high impedance and ODT resistance begins to turn on. ODT turn on time max is when
the ODT resistance is fully on. Both are measure from
t
AOND
.
2) ODT turn off time min. is when the device starts to turn off ODT resistance. ODT turn off time max is when the bus is in high impedance.
Both are measured from
t
AOFD
.
2)
Symbol
Parameter / Condition
Values
Unit
Note
Min.
Max.
t
AOND
t
AON
t
AONPD
t
AOFD
t
AOF
t
AOFPD
t
ANPD
t
AXPD
ODT turn-on delay
ODT turn-on
ODT turn-on (Power-Down Modes)
ODT turn-off delay
ODT turn-off
ODT turn-off (Power-Down Modes)
ODT to Power Down Mode Entry Latency
ODT Power Down Exit Latency
2
t
AC.MIN
t
AC.MIN
+ 2 ns
2.5
t
AC.MIN
t
AC.MIN
+ 2 ns
3
8
2
t
AC.MAX
+ 1 ns
2
t
CK +
t
AC.MAX
+ 1 ns
2.5
t
AC.MAX
+ 0.6 ns
2.5
t
CK +
t
AC.MAX
+ 1 ns
t
CK
ns
ns
t
CK
ns
ns
t
CK
t
CK
1)
1) ODT turn on time min. is when the device leaves high impedance and ODT resistance begins to turn on. ODT turn on time max is when
the ODT resistance is fully on. Both are measure from
t
AOND
.
2) ODT turn off time min. is when the device starts to turn off ODT resistance. ODT turn off time max is when the bus is in high impedance.
Both are measured from
t
AOFD
.
2)
相關(guān)PDF資料
PDF描述
HYS72T256020HU-3-A 240-Pin Unbuffered DDR2 SDRAM Modules
HYS72T256020HU-5-A 240-Pin Unbuffered DDR2 SDRAM Modules
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HYS72T256023HR 240-Pin Registered DDR2 SDRAM Modules
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HYS72T256020HU-3-A 制造商:QIMONDA 制造商全稱:QIMONDA 功能描述:240-Pin Unbuffered DDR2 SDRAM Modules
HYS72T256020HU-3S-A 制造商:QIMONDA 制造商全稱:QIMONDA 功能描述:240-Pin Unbuffered DDR2 SDRAM Modules
HYS72T256020HU-5-A 制造商:QIMONDA 制造商全稱:QIMONDA 功能描述:240-Pin Unbuffered DDR2 SDRAM Modules
HYS72T256023 制造商:QIMONDA 制造商全稱:QIMONDA 功能描述:240-Pin Registered DDR2 SDRAM Modules
HYS72T256023HR 制造商:QIMONDA 制造商全稱:QIMONDA 功能描述:240-Pin Registered DDR2 SDRAM Modules