5.05

9

IDT7207 CMOS ASYNCHRONOUS FIFO

32,768 x 9

MILITARY AND COMMERCIAL TEMPERATURE RANGES

Figure 12. Block Diagram of 32,768 x 9 FIFO Used in Single Device Mode

NOTE:

1. Flag detection is accomplished by monitoring the

FF, EF and HF signals on either (any) device used in the width expansion configuration.

Do not connect any output signals together.

Figure 13. Block Diagram of 32,768 x 18 FIFO Memory Used in Width Expansion Mode

WRITE (

W)

DATA IN (D)

FULL FLAG (

FF)

RESET (

RS)

9

READ (

R)

9

DATA OUT (Q)

EMPTY FLAG (

EF)

RETRANSMIT (

RT)

EXPANSION IN (

XI)

(

HF)

IDT

7207

(HALF–FULL FLAG)

3140 drw 15

IDT

7207

XI

XI

9

18

9

WRITE (

W)

FULL FLAG (

FF)

RESET (

RS)

99

18

HF

HF

DATA

(D)

IN

READ (

R)

EMPTY FLAG (

EF)

RETRANSMIT (

RT)

DATA

(Q)

OUT

IDT

7207

3140 drw 16