SN74V3640 datasheet(21/50 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

Download	50 Pages

Scroll/Zoom	100%

Manufacturer	TI [Texas Instruments]

Direct Link	http://www.ti.com

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21 / 50 page

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

21

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

1st Parallel Offset Write/Read Cycle

Data Inputs/Outputs

D/Q35

D/Q15

D/Q8

D/Q0

EMPTY OFFSET REGISTER (PAE) BIT LOCATIONS

X

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Noninterspersed Parity

X

15

14

13

12

11

10

9

X

8

7

6

5

4

3

2

1

Interspersed Parity

2nd Parallel Offset Write/Read Cycle

Data Inputs/Outputs

D/Q35

D/Q17

D/Q8

D/Q0

FULL OFFSET REGISTER (PAF) BIT LOCATIONS

X

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Noninterspersed Parity

X

16

15

14

13

12

11

10

9

X

8

7

6

5

4

3

2

1

Interspersed Parity

×36 Bus Width

1st Parallel Offset Write/Read Cycle

D/Q17

D/Q15

Data Inputs/Outputs

D/Q0

EMPTY OFFSET (LSB) REGISTER (PAE) BIT LOCATIONS

X

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Noninterspersed Parity

X

15

14

13

12

11

10

9

X

8

7

6

5

4

3

2

1

Interspersed Parity

D/Q8

2nd Parallel Offset Write/Read Cycle

D/Q17

D/Q15

Data Inputs/Outputs

D/Q0

FULL OFFSET (LSB) REGISTER (PAF) BIT LOCATIONS

X

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Noninterspersed Parity

X

15

14

13

12

11

10

9

X

8

7

6

5

4

3

2

1

Interspersed Parity

D/Q8

×18 Bus Width

Number of bits used:

10 bits for the SN74V3640

11 bits for the SN74V3650

12 bits for the SN74V3660

13 bits for the SN74V3670

14 bits for the SN74V3680

15 bits for the SN74V3690

Note: All unused bits of the

LSB and MSB are don’t care.

Figure 3. Programmable Flag Offset Programming Sequence (Continued)

Figure 1Figure 2

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SN74V3640 Datasheet(PDF) 21 Page - Texas Instruments

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