전자부품 데이터시트 검색엔진
  Korean  ▼
ALLDATASHEET.CO.KR

X  

Preview PDF HTML

AS4C64M8D2 데이터시트(PDF) 13 Page - Alliance Semiconductor Corporation

부품명 AS4C64M8D2
상세설명  Fully synchronous operation
PDF  59 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
제조업체  ALSC [Alliance Semiconductor Corporation]
홈페이지  https://www.alliancememory.com
Logo ALSC - Alliance Semiconductor Corporation

AS4C64M8D2 데이터시트(HTML) 13 Page - Alliance Semiconductor Corporation

Back Button AS4C64M8D2 Datasheet HTML 9Page - Alliance Semiconductor Corporation AS4C64M8D2 Datasheet HTML 10Page - Alliance Semiconductor Corporation AS4C64M8D2 Datasheet HTML 11Page - Alliance Semiconductor Corporation AS4C64M8D2 Datasheet HTML 12Page - Alliance Semiconductor Corporation AS4C64M8D2 Datasheet HTML 13Page - Alliance Semiconductor Corporation AS4C64M8D2 Datasheet HTML 14Page - Alliance Semiconductor Corporation AS4C64M8D2 Datasheet HTML 15Page - Alliance Semiconductor Corporation AS4C64M8D2 Datasheet HTML 16Page - Alliance Semiconductor Corporation AS4C64M8D2 Datasheet HTML 17Page - Alliance Semiconductor Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 13 / 59 page
background image
AS4C64M8D2
Confidential
13
Rev. 1.0
Feb. /2014
 ODT (On Die Termination)
On Die Termination (ODT) is a feature that allows a DRAM to turn on/off termination resistance for each DQ,
DQS/DQS#, DM signal via the ODT control pin. The ODT feature is designed to improve signal integrity of the
memory channel by allowing the DRAM controller to independently turn on/off termination resistance for any or all
DRAM devices.
The ODT function is supported for ACTIVE and STANDBY modes. It is turned off and not supported in SELF
REFRESH mode.
Figure 4. Functional representation of ODT
SW1
Rval1
VDDQ
SW1
Rval1
VSSQ
SW3
Rval3
VDDQ
SW3
Rval3
VSSQ
SW2
Rval2
VDDQ
SW2
Rval2
VSSQ
Input
pin
DRAM
Input
Buffer
Switch (sw1, sw2, sw3) is enabled by ODT pin.
Selection among sw1, sw2, and sw3 is determined by “Rtt (nominal)” in EMR.
Termination included on all DQs, DM, DQS, DQS# pins
Table 9. ODT DC Electrical Characteristics
Parameter/Condition
Symbol
Min.
Nom.
Max.
Unit Note
Rtt effective impedance value for EMRS(A6,A2)=0,1;75Ω
Rtt1(eff)
60
75
90
Ω
1
Rtt effective impedance value for EMRS(A6,A2)=1,0;150Ω Rtt2(eff)
120
150
180
Ω
1
Rtt effective impedance value for EMRS(A6,A2)=1,1;50Ω
Rtt3(eff)
40
50
60
Ω
1
Rtt mismatch tolerance between any pull-up/pull-down pair
Rtt(mis)
-6
-
6
%
2
NOTE 1: Measurement Definition for Rtt(eff):
Apply VIH (ac) and VIL (ac) to test pin separately, then measure current I(VIH(ac)) and I(VIL(ac)) respectively.
( )
( )
IH
IL
IH
IL
V ac
V ac
Rtt(eff)=
I(V (ac))-I(V (ac))
NOTE 2: Measurement Definition for Rtt (mis): Measure voltage (VM) at test pin (midpoint) with no load.
1 100%




DDQ
2xVM
Rtt(mis)=
V



Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59


데이터시트 다운로드

Go To PDF Page


링크 URL



ALLDATASHEET 가 귀하에 도움이 되셨나요?  [ DONATE ] 

Alldatasheet는?   |   광고문의   |   운영자에게 연락하기   |   개인정보취급방침   |   링크 투 데이터시트    |   링크교환   |   제조사별 검색
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com