SN74ALS2238

32 × 9 × 2 ASYNCHRONOUS BIDIRECTIONAL FIRST IN, FIRST OUT MEMORY

SDAS182 − APRIL 1990

4

POST OFFICE BOX 655303

POST OFFICE BOX 1443

FIFO A

Bus A

In

Bus B

Out

FIFO B

Out

In

SAB

L

SBA

X

GAB

H

GBA

L

FIFO A

In

Out

FIFO B

Out

In

Bus A

Bus B

SAB

X

SBA

L

GAB

L

GBA

H

SAB

H

SBA

X

GAB

H

GBA

L

SAB

X

SBA

H

GAB

L

GBA

H

SAB

X

SBA

X

GAB

L

GBA

L

SAB

H

SBA

L

GAB

H

GBA

H

SAB

L

SBA

H

GAB

H

GBA

H

SAB

H

SBA

H

GAB

H

GBA

H

FIFO A

Bus A

In

Bus B

Out

FIFO B

Out

In

FIFO A

Bus A

In

Bus B

Out

FIFO B

Out

In

FIFO A

Bus A

In

Bus B

Out

FIFO B

Out

In

FIFO A

Bus A

In

Bus B

Out

FIFO B

Out

In

FIFO A

Bus A

In

Bus B

Out

FIFO B

Out

In

FIFO A

In

Out

FIFO B

Out

In

Bus A

Bus B

Figure 1. Bus-Management Functions