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UT54ACS244/UT54ACTS244

Radiation-Hardened

Octal Buffers & Line Drivers, Three-State Outputs

FEATURES

Three-state outputs drive bus lines or buffer memory address

registers

radiation-hardened CMOS

- Latchup immune

High speed

Low power consumption

Single 5 volt supply

Available QML Q or V processes

Flexible package

- 20-pin DIP

- 20-lead flatpack

DESCRIPTION

The UT54ACS244 and the UT54ACTS244 are non-inverting

octal buffer and line drivers which improve the performance and

density of three-state memory address drivers, clock drivers,

and bus-oriented receivers and transmitters.

The devices are characterized over full military temperature

range of -55 C to +125 C.

FUNCTION TABLE

INPUTS

1G, 2G

L

L

H

A

L

H

X

OUTPUT

Y

L

H

Z

PINOUTS

20-Pin DIP

Top View

1G

1A1

2Y4

1A2

2Y3

1A3

2Y2

1A4

2Y1

V

SS

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

V

DD

2G

1Y1

2A4

1Y2

2A3

1Y3

2A2

1Y4

2A1

20-Lead Flatpack

Top View

1G

1A1

2Y4

1A2

2Y3

1A3

2Y2

1A4

2Y1

V

SS

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

V

DD

2G

1Y1

2A4

1Y2

2A3

1Y3

2A2

1Y4

2A1

LOGIC SYMBOL

1G

1A1

(1)

(2)

EN

(18)

(16)

(14)

(12)

1Y1

1Y2

1Y3

1Y4

(4)

1A2

(6)

1A3

(8)

1A4

(19)

(11)

2G

2A1

EN

(9)

(7)

(5)

(3)

2Y1

2Y2

2Y3

2Y4

(13)

2A2

(15)

2A3

(17)

2A4

Note:

1. Logic symbol in accordance with ANSI/IEEE Std 91-1984 and IEC

Publication 617-12.

159

RadHard MSI Logic

next

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