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SN74V3640 Datasheet(PDF) 40 Page - Texas Instruments

Part # SN74V3640
Description  102436, 204836, 409636, 819236, 1638436, 32768 횞 36 3.3-V CMOS FIRST-IN, FIRST-OUT MEMORIES
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

SN74V3640 Datasheet(HTML) 40 Page - Texas Instruments

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SN74V3640, SN74V3650, SN74V3660, SN74V3670, SN74V3680, SN74V3690
1024
× 36, 2048 × 36, 4096 × 36, 8192 × 36, 16384 × 36, 32768 × 36
3.3-V CMOS FIRST-IN, FIRST-OUT MEMORIES
SCAS668A – NOVEMBER 2001 – REVISED MARCH 2003
40
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
tCLKL
tENH
n Words in FIFO (see Note B)
n + 1 Words in FIFO (see Note C)
tsk2
(see Note D)
WCLK
WEN
RCLK
12
1
2
REN
tENS
tPAES
n Words in FIFO (see Note B)
n + 1 Words in FIFO (see Note C)
tPAES
tENS
tENH
n Words in FIFO (see Note B)
n + 1 Words in FIFO (see Note C)
NOTES: A. n = PAE offset
B. For standard mode
C. For FWFT mode
D. tsk2 is the minimum time between a rising WCLK edge and a rising RCLK edge to ensure that PAE goes high (after one
RCLK cycle + tPAES). If the time between the rising edge of WCLK and the rising edge of RCLK is less than tsk2, PAE deassertion
can be delayed one additional RCLK cycle.
E. PAE is asserted and updated on the rising edge of WCLK only.
F. Select this mode by setting PFM high during master reset.
PAE
tCLKH
Figure 16. Synchronous Programmable Almost-Empty Flag Timing (Standard and FWFT Modes)


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