SN74ACT2236

1024 × 9 × 2

ASYNCHRONOUS BIDIRECTIONAL FIRST IN, FIRST OUT MEMORY

SCAS149A − APRIL 1990 − REVISED SEPTEMBER 1995

7

POST OFFICE BOX 655303

POST OFFICE BOX 1443

SELECT-MODE CONTROL TABLE

CONTROL

OPERATION

SAB

SBA

A BUS

B BUS

L

L

Real-time B to A bus

Real-time A to B bus

L

H

FIFO B to A bus

Real-time A to B bus

H

L

Real-time B to A bus

FIFO A to B bus

H

H

FIFO B to A bus

FIFO A to B bus

OUTPUT-ENABLE CONTROL TABLE

CONTROL

OPERATION

DIR

OE

A BUS

B BUS

X

H

Input

Input

L

L

Output

Input

H

L

Input

Output

Figure 1. Bus-Management Functions (Continued)

−0.5 V to 7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage: Control inputs

7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

I/O ports

5.5 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Voltage applied to a disabled 3-state output

5.5 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0

°C to 70°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

−65

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

150

°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.