723643L15PF Integrated Device Technology (Idt), 723643L15PF Datasheet - Page 21

• Manufacturer Part Number: 723643L15PF
• Description: FIFO Mem Sync Dual Depth/Width Bi-Dir 1K x 36 128-Pin TQFP
• Manufacturer: Integrated Device Technology (Idt)

Specifications of 723643L15PF

• Package: 128TQFP
• Configuration: Dual
• Bus Directional: Bi-Directional
• Density: 36 Kb
• Organization: 1Kx36
• Data Bus Width: 36 Bit
• Timing Type: Synchronous
• Expansion Type: Depth|Width
• Typical Operating Supply Voltage: 5 V
• Operating Temperature: 0 to 70 °C

NOTES:
1. t
2. If Port B size is word or byte, OR is set LOW by the last word or byte read from the FIFO, respectively.
IDT723623/723633/723643 BUS-MATCHING SyncFIFO™
256 x 36, 512 x 36, 1,024 x 36
A0-A35
B0-B35
W/RA
CLKA
CLKB
W/RB
If the time between the rising CLKA edge and rising CLKB edge is less than t
cycle later than shown.
MBA
MBB
CSA
ENA
CSB
ENB
SKEW1
OR
IR
is the minimum time between a rising CLKA edge and a rising CLKB edge for OR to transition HIGH and to clock the next word to the FIFO output register in three CLKB cycles.
LOW
HIGH
HIGH
FIFO Empty
LOW
HIGH
LOW
t
t
ENS2
ENS2
t
Figure 11. OR Flag Timing and First Data Word Fall Through when FIFO is Empty (FWFT Mode)
DS
W1
Old Data in FIFO Output Register
t
SKEW1
t
t
t
ENH
ENH
DH
(1)
t
CLKH
1
t
CLK
t
CLKL
SKEW1
, then the transition of OR HIGH and load of the first word to the output register may occur one CLKB
21
2
t
CLKH
t
CLK
t
CLKL
t
3
REF
t
A
t
ENS2
COMMERCIAL TEMPERATURE RANGE
t
REF
t
ENH
W1
3269 drw12