SN74V3640 datasheet(43/50 Pages) TI

Part #	SN74V3640

Description	1024 횞 36, 2048 횞 36, 4096 횞 36, 8192 횞 36, 16384 횞 36, 32768 횞 36 3.3-V CMOS FIRST-IN, FIRST-OUT MEMORIES

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Manufacturer	TI [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

43

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

WCLK

WEN

HF

RCLK

REN

tENH

tENS

+ 1 Words in FIFO (see Note B)

tCLKL

tCLKH

tHF

NOTES: A. In standard mode: D = maximum FIFO depth. D = 1024 for the SN74V3640, D = 2048 for the SN74V3650, D = 4096 for the

SN74V3660, D = 8192 for the SN74V3670, D = 16384 for the SN74V3680, and D = 32768 for the SN74V3690.

B. In FWFT mode: D = maximum FIFO depth. D = 1025 for the SN74V3640, D = 2049 for the SN74V3650, D = 4097 for the

SN74V3660, D = 8193 for the SN74V3670, D = 16385 for the SN74V3680, and D = 32769 for the SN74V3690.

tHF

Words in FIFO (see Note A)

D

2

D

* 1

2

+ 1 Words in FIFO (see Note B)

Words in FIFO (see Note A)

D

2

D

* 1

2

+ 1 Words in FIFO

(see Note B)

Words in FIFO

(see Note A)

D

2

D

* 1

2

Figure 19. Half-Full Flag Timing (Standard and FWFT Modes)

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