723631L15PF Integrated Device Technology (Idt), 723631L15PF Datasheet - Page 17

• Manufacturer Part Number: 723631L15PF
• Description: FIFO Mem Sync Dual Depth Bi-Dir 512 x 36 120-Pin TQFP
• Manufacturer: Integrated Device Technology (Idt)

Specifications of 723631L15PF

• Package: 120TQFP
• Configuration: Dual
• Bus Directional: Bi-Directional
• Density: 18 Kb
• Organization: 512x36
• Data Bus Width: 36 Bit
• Timing Type: Synchronous
• Expansion Type: Depth
• Typical Operating Supply Voltage: 5 V
• Operating Temperature: 0 to 70 °C

NOTES:
1. t
2. Depth is 512 for the IDT723631, 1,024 for the IDT723641, and 2,048 for the IDT723651.
3. FIFO write (CSA = LOW, W/RA = HIGH, MBA = LOW), FIFO read (CSB = LOW, W/RB = HIGH, MBB = LOW).
NOTE:
1. CSB = LOW, W/RB = HIGH, MBB = LOW. No input enables other than RTM and RFM are needed to control retransmit mode or begin a retransmit. Other enables are shown
NOTE:
1. X is the value loaded in the Almost-Empty flag Offset register.
CLKA
CLKB
B0-B35
CLKB
IDT723631/723641/723651 CMOS SyncFIFO™
512 x 36, 1,024 x 36 and 2,048 x 36
RFM
ENA
RTM
ENB
and rising CLKA edge is less than t
CLKB
only to relate retransmit operations to the FIFO output register.
SKEW2
RTM
AE
RFM
ENB
AF
OR
is the minimum time between a rising CLKA edge and a rising CLKB edge for AF to transition HIGH in the next CLKA cycle. If the time between the rising CLKB edge
HIGH
HIGH
[Depth -(Y+1)] Words in FIFO
Initiate Retransmit Mode
with W0 as First Word
(2)
t
Figure 12. AE
ENS1
t
t
ENS1
RMS
t
W0
RMS
X or fewer words from Empty
AE
AE
AE
AE Maximum Latency When Retransmit Increases the Number of Stored Words Above X.
SKEW2
Figure 11. Retransmit Timing Showing Minimum Retransmit Length
, then AF may transition HIGH one CLKA cycle later than shown.
t
ENH1
t
PAF
t
A
t
t
ENH1
RMH
t
RMH
Figure 10. Timing for AF
t
ENS1
W1
1
AF AF
AF
AF when FIFO is Almost-Full
t
A
17
t
SKEW2
t
ENH1
(Depth -Y) Words in FIFO
Retransmit from
Selected Position
(1)
t
(2)
RMS
W2
1
t
2
A
t
RMH
t
PAE
End Retransmit
Mode
t
RMS
COMMERCIAL AND INDUSTRIAL
W0
(X+1) or more
words from Empty
2
t
PAF
TEMPERATURE RANGES
t
A
t
RMH
W1
3023 drw14
3023 drw15
3023 drw13