28
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES
IDT72V3640/50/60/70/80/90 3.3V HIGH DENSITY SUPERSYNC II
TM
36-BIT FIFO
1,024 x 36, 2,048 x 36, 4,096 x 36, 8,192 x 36, 16,384 x 36 and 32,768 x 36
Figure 9. Write Timing (First Word Fall Through Mode)
NOTES:
1. t
SKEW1 is the minimum time between a rising WCLK edge and a rising RCLK edge to guarantee that OR will go LOW after two RCLK cycles plus tREF. If the time between the rising edge of WCLK and the rising edge of RCLK is less than
t
SKEW1, then OR assertion may be delayed one extra RCLK cycle.
2. t
SKEW2 is the minimum time between a rising WCLK edge and a rising RCLK edge to guarantee that PAE will go HIGH after one RCLK cycle plus tPAES. If the time between the rising edge of WCLK and the rising edge of RCLK is less than
t
SKEW2, then the PAE deassertion may be delayed one extra RCLK cycle.
3. LD = HIGH, OE = LOW
4. n = PAE offset, m = PAF offset and D = maximum FIFO depth.
5. D = 1,025 for IDT72V3640, 2,049 for IDT72V3650, 4,097 for IDT72V3660, 8,193 for IDT72V3670, 16,385 for the IDT72V3680 and 32,769 for the IDT72V3690.
6. First data word latency = t
SKEW1 + 2*TRCLK + tREF.
W
1
W
2
W
4
W
[n +2]
W
[D-m-1]
W
[D-m-2]
W
[D-1]
W
D
W
[n+3]
W
[n+4]
W
[D-m]
W
[D-m+1]
WCLK
WEN
D
0
- D
17
RCLK
t
DH
t
DS
t
SKEW1
(1)
REN
Q
0
- Q
17
PAF
HF
PAE
IR
t
DS
t
DS
t
DS
t
SKEW2
t
A
t
REF
OR
t
PAES
t
HF
t
PAFS
t
WFF
W
[D-m+2]
W
1
t
ENH
4667 drw14
DATA IN OUTPUT REGISTER
(2)
W
3
1
2
3
1
D-1
2
+1
][
W
D-1
+2
][
W
2
D-1
+3
][
W
2
1
2
t
ENS
29
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES
IDT72V3640/50/60/70/80/90 3.3V HIGH DENSITY SUPERSYNC II
TM
36-BIT FIFO
1,024 x 36, 2,048 x 36, 4,096 x 36, 8,192 x 36, 16,384 x 36 and 32,768 x 36
Figure 10. Read Timing (First Word Fall Through Mode)
NOTES:
1. t
SKEW1 is the minimum time between a rising RCLK edge and a rising WCLK edge to guarantee that IR will go LOW after one WCLK cycle plus tWFF. If the time between the rising edge of RCLK and the rising edge of WCLK is less than
t
SKEW1, then the IR assertion may be delayed one extra WCLK cycle.
2. t
SKEW2 is the minimum time between a rising RCLK edge and a rising WCLK edge to guarantee that PAF will go HIGH after one WCLK cycle plus tPAFS. If the time between the rising edge of RCLK and the rising edge of WCLK is less than
t
SKEW2, then the PAF deassertion may be delayed one extra WCLK cycle.
3. LD = HIGH
4. n = PAE Offset, m = PAF offset and D = maximum FIFO depth.
5. D = 1,025 for IDT72V3640, 2,049 for IDT72V3650, 4,097 for IDT72V3660, 8,193 for IDT72V3670, 16,385 for the IDT72V3680 and 32,769 for the IDT72V3690.
WCLK
12
WEN
D
0
- D
17
RCLK
t
ENS
REN
Q
0
- Q
17
PAF
HF
PAE
IR
OR
W
1
W
1
W
2
W
3
W
m+2
W
[m+3]
t
OHZ
t
SKEW1
t
ENH
t
DS
t
DH
t
OE
t
A
t
A
t
A
t
PAFS
t
WFF
t
WFF
t
ENS
OE
t
SKEW2
W
D
4667 drw15
t
PAES
W
[D-n]
W
[D-n-1]
t
A
t
A
t
HF
t
REF
W
[D-1]
W
D
t
A
W
[D-n+1]
W
[m+4]
W
[D-n+2]
(1)
(2)
t
ENS
D-1
+ 1
][
W
2
D-1
+ 2
][
W
2
1
30
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES
IDT72V3640/50/60/70/80/90 3.3V HIGH DENSITY SUPERSYNC II
TM
36-BIT FIFO
1,024 x 36, 2,048 x 36, 4,096 x 36, 8,192 x 36, 16,384 x 36 and 32,768 x 36
NOTES:
1. Retransmit setup is complete after EF returns HIGH, only then can a read operation begin.
2. OE = LOW.
3. W1 = first word written to the FIFO after Master Reset, W2 = second word written to the FIFO after Master Reset.
4. No more than D - 2 may be written to the FIFO between Reset (Master or Partial) and Retransmit setup. Therefore, FF will be HIGH throughout the Retransmit setup procedure.
D = 1,024 for IDT72V3640, 2,048 for IDT72V3650, 4,096 for IDT72V3660, 8,192 for IDT72V3670, 16,384 for the IDT72V3680 and 32,768 for the IDT72V3690.
5. There must be at least two words written to the FIFO before a Retransmit operation can be invoked.
6. RM is set HIGH during MRS.
Figure 11. Retransmit Timing (IDT Standard Mode)
t
REF
t
RTS
t
ENH
4667 drw16
t
A
t
ENS
W
x
WCLK
RCLK
REN
RT
EF
PAF
HF
PAE
Q
0
- Q
n
t
SKEW2
12
1
W
1
t
PAFS
t
HF
t
PAES
t
REF
W
x+1
2
W
2
t
ENH
WEN
t
ENS
t
RTS
t
ENS
t
ENH
(3)
t
A
t
A
(3)

72V3640L6BB

Mfr. #:
Manufacturer:
IDT
Description:
FIFO 3.3V 32K X 36 SSII
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union