61

RadHard MSI Logic

UT54ACS109/UT54ACTS109

Radiation-Hardened

Dual J-K Flip-Flops

FEATURES

•

radiation-hardened CMOS

- Latchup immune

• High speed

• Low power consumption

• Single 5 volt supply

• Available QML Q or V processes

• Flexible package

- 16-pin DIP

- 16-lead flatpack

DESCRIPTION

The UT54ACS109 and the UT54ACTS109 are dual J-K posi-

tive triggered flip-flops. A low level at the preset or clear inputs

sets or resets the outputs regardless of the other input levels.

When preset and clear are inactive (high), data at the J and K

input meeting the setup time requirements are transferred to the

outputs on the positive-going edge of the clock pulse. Following

the hold time interval, data at the J and K input can be changed

without affecting the levels at the outputs. The flip-flops can

perform as toggle flip-flops by grounding K and tying J high.

They also can perform as D flip-flops if J and K are tied together.

The devices are characterized over full military temperature

range of -55 C to +125 C.

FUNCTION TABLE

Note:

1. The output levels in this configuration are not guaranteed to meet the mini-

addition, this configuration is nonstable; that is, it will not persist when either

preset or clear returns to its inactive (high) level.

PINOUTS

16-Pin DIP

Top View

16-Lead Flatpack

Top View

LOGIC SYMBOL

INPUTS

OUTPUT

PRE

CLR

CLK

J

K

Q

Q

L

H

X

X

X

H

L

H

L

X

X

X

L

H

L

L

X

X

X

H

H

L

L

L

H

H

H

H

L

Toggle

H

H

L

H

No Change

H

H

H

H

H

L

H

H

L

X

X

No Change

1

2

3

4

5

7

6

16

15

14

13

12

10

11

CLR1

J

K1

CLK1

PRE1

Q1

CLR2

J2

K2

CLK2

PRE2

Q2

8

9

Q2

Q1

1

2

3

4

5

7

6

16

15

14

13

12

10

11

CLR1

J1

K1

CLK1

PRE1

Q1

Q1

8

9

CLR2

J2

K2

CLK2

PRE2

Q2

Q2

Q1

(6)

(7)

Q1

Q2

(10)

(9)

Q2

(5)

PRE1

(4)

CLK1

(1)

CLR1

(11)

PRE2

(14)

J2

(12)

CLK2

(13)

K2

Note:

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

IEC Publication 617-12.

S

C1

R

(2)

J1

J1

(3)

K1

K1

(15)

CLR2