28
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES
IDT72T2098/108/118/128 2.5V HIGH-SPEED TeraSync™ DDR/SDR FIFO 20-BIT/10-BIT CONFIGURATIONS
32K x 20/64K x 10, 64K x 20/128K x 10, 128K x 20/256K x 10, 256K x 20/512K x 10
FEBRUARY 13, 2009
Figure 8. Master Reset Timing
NOTE:
1. During Master Reset the High-Impedance control of the Qn data outputs is provided by OE only, RCS can be HIGH or LOW until the first rising edge of RCLK after Master Reset
is complete.
2. The status of these pins are latched in when the Master Reset pulse is LOW.
5996 drw11
RT
SEN
t
RSF
t
RSF
OE = HIGH
OE = LOW
PAE
PAF
Q
0
- Q
n
t
RSF
EF/OR
FF/IR
t
RSF
t
RSF
If FWFT = HIGH, OR = HIGH
If FWFT = LOW, EF = LOW
If FWFT = LOW, FF = HIGH
If FWFT = HIGH, IR = LOW
t
RSS
t
RSS
SREN
t
RSS
t
RS
MRS
t
RSR
REN
t
RSS
FWFT
(2)
t
RSR
t
RSR
WEN
FSEL0
(2)
,
FSEL1
OW, IW
(2)
t
RSS
t
RSS
t
RSS
t
RSS
t
HRSS
HSTL
(2
WSDR
(2)
t
RSR
t
RSS
RSDR
(2)
t
RSR
t
RSS
29
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES
IDT72T2098/108/118/128 2.5V HIGH-SPEED TeraSync™ DDR/SDR FIFO 20-BIT/10-BIT CONFIGURATIONS
32K x 20/64K x 10, 64K x 20/128K x 10, 128K x 20/256K x 10, 256K x 20/512K x 10
FEBRUARY 13, 2009
Figure 9. Partial Reset Timing
NOTE:
1. During Partial Reset the High-Impedance control of the Qn data outputs is provided by OE only, RCS can be HIGH or LOW until the first rising edge of RCLK after Master Reset
is complete.
t
RS
PRS
t
RSR
REN
t
RSS
5995 drw12
t
RSR
WEN
RT
SEN
t
RSF
t
RSF
OE = HIGH
OE = LOW
PAE
PAF
Q
0
- Q
n
t
RSF
EF/OR
FF/IR
t
RSF
t
RSF
If FWFT = HIGH, OR = HIGH
If FWFT = LOW, EF = LOW
If FWFT = LOW, FF = HIGH
If FWFT = HIGH, IR = LOW
t
RSS
t
RSS
t
RSS
SREN
t
RSS
30
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES
IDT72T2098/108/118/128 2.5V HIGH-SPEED TeraSync™ DDR/SDR FIFO 20-BIT/10-BIT CONFIGURATIONS
32K x 20/64K x 10, 64K x 20/128K x 10, 128K x 20/256K x 10, 256K x 20/512K x 10
FEBRUARY 13, 2009
Figure 10. Write Cycle and Full Flag Timing (IDT Standard Mode)
NOTES:
1. tSKEW1 is the minimum time between a rising RCLK edge and a rising WCLK edge to guarantee that FF will go HIGH (after one WCLK cycle plus tWFF). If the time between the
rising edge of the RCLK and the rising edge of the WCLK is less than tSKEW1, then the FF deassertion may be delayed one extra WCLK cycle.
2. OE = LOW, EF = HIGH.
3. WCS = LOW.
4. WCLK must be free running for FF to update.
D
0
- D
19
WEN
RCLK
REN
t
ENH
t
ENH
Q
0
- Q
19
DATA READ
NEXT DATA READ
t
SKEW1
(1)
5996 drw13
WCLK
NO WRITE
1
2
1
2
NO WRITE
t
WFF
t
A
t
ENS
t
ENS
(1)
t
DS
t
A
D
X
t
DH
t
CLK1
t
CLKH1
FF
RCS
t
ENS
t
RCSLZ
t
WFF
t
SKEW1
t
CLKL1
D
X+1
t
WFF
t
WFF
t
DS
t
DH

IDT72T20118L5BB

Mfr. #:
Manufacturer:
Description:
IC FIFO 65536X20 5NS 208BGA
Lifecycle:
New from this manufacturer.
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