參數(shù)資料
型號(hào): IDT70T3319S133BC
廠商: INTEGRATED DEVICE TECHNOLOGY INC
元件分類: DRAM
英文描述: HIGH-SPEED 2.5V 512/256/128K X 18 SYNCHRONOUS DUAL-PORT STATIC RAM WITH 3.3V OR 2.5V INTERFACE
中文描述: 256K X 18 DUAL-PORT SRAM, 15 ns, PBGA256
封裝: 17 X 17 MM, 1.40 MM HEIGHT, 1 MM PITCH, BGA-256
文件頁(yè)數(shù): 16/28頁(yè)
文件大?。?/td> 485K
代理商: IDT70T3319S133BC
6.42
IDT70T3339/19/99S
High-Speed 2.5V 512/256/128K x 18 Dual-Port Static RAM Industrial and Commercial Temperature Ranges
PRELIMINARY
16
Timing Waveform of Pipelined Read-to-Write-to-Read
(
OE
= V
IL
)
(2)
t
CH2
t
CL2
Timing Waveform of Pipelined Read-to-Write-to-Read (
OE
Controlled)
(2)
t
CYC2
NOTES:
1. Output state (High, Low, or High-impedance) is determned by the previous cycle control signals.
2.
CE
0
,
UB
,
LB
, and
ADS
= V
IL
; CE
1
,
CNTEN
, and
REPEAT
= V
IH
.
3. Addresses do not have to be accessed sequentially since
ADS
= V
IL
constantly loads the address on the rising edge of the CLK; numbers are for reference
use only.
4. This timng does not meet requirements for fastest speed grade. This waveformindicates how logically it could be done if timng so allows.
R/
W
ADDRESS
An
An +1
An + 2
An + 2
An + 3
An + 4
DATA
IN
Dn + 2
CE
0
CLK
5652 drw 11
Qn
Qn + 3
DATA
OUT
CE
1
UB
,
LB
t
CD2
t
CKHZ
t
CKLZ
t
CD2
t
SC
t
HC
t
SB
t
HB
t
SW
t
HW
t
SA
t
HA
t
CYC2
READ
NOP
READ
t
SD
t
HD
(3)
(1)
t
SW
t
HW
WRITE
(4)
,
R/
W
ADDRESS
An
An +1
An + 2
An + 3
An + 4
An + 5
DATA
IN
Dn + 3
Dn + 2
CE
0
CLK
5652 drw 12
DATA
OUT
Qn
Qn + 4
CE
1
UB
,
LB
OE
t
CH2
t
CL2
t
CKLZ
t
CD2
t
OHZ
t
CD2
t
SD
t
HD
READ
WRITE
READ
t
SC
t
HC
t
SB
t
HB
t
SW
t
HW
t
SA
t
HA
(3)
(1)
t
SW
t
HW
(4)
,
NOTES:
1. Output state (High, Low, or High-impedance) is determned by the previous cycle control signals.
2.
CE
0
,
UB
,
LB
, and
ADS
= V
IL
; CE
1
,
CNTEN
, and
REPEAT
= V
IH
. "NOP" is "No Operation".
3. Addresses do not have to be accessed sequentially since
ADS
= V
IL
constantly loads the address on the rising edge of the CLK; numbers
are for reference use only.
4. "NOP" is "No Operation." Data in memory at the selected address may be corrupted and should be re-written to guarantee data integrity.
相關(guān)PDF資料
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