CD54AC109, CD74AC109

DUAL J-K POSITIVE-EDGE-TRIGGERED FLIP-FLOPS

WITH CLEAR AND PRESET

SCHS326 – JANUARY 2003

1

POST OFFICE BOX 655303

and Balanced Noise Immunity at 30% of the

Supply Voltage

Significantly Reduced Power Consumption

– Fanout to 15 F Devices

Circuit Design

MIL-STD-883, Method 3015

description/ordering information

The ’AC109 devices contain two independent J-K positive-edge-triggered flip-flops. A low level at the preset

(PRE) or clear (CLR) inputs sets or resets the outputs, regardless of the levels of the other inputs. When PRE

and CLR are inactive (high), data at the J and K inputs meeting the setup-time requirements are transferred to

the outputs on the positive-going edge of the clock (CLK) pulse. Clock triggering occurs at a voltage level and

is not directly related to the rise time of the clock pulse. Following the hold-time interval, data at the J and K inputs

can be changed without affecting the levels at the outputs. These versatile flip-flops can perform as toggle

flip-flops by grounding K and tying J high. They also can perform as D-type flip-flops if J and K are tied together.

ORDERING INFORMATION

TA

PACKAGE†

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

PDIP – E

Tube

CD74AC109E

CD74AC109E

–55

°C to 125°C

SOIC – M

Tape and reel

CD74AC109M96

AC109M

CDIP – F

Tube

CD54AC109F3A

CD54AC109F3A

† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines

are available at www.ti.com/sc/package.

CD54AC109 ...F PACKAGE

CD74AC109 ...E OR M PACKAGE

(TOP VIEW)

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

1CLR

1J

1K

1CLK

1PRE

1Q

1Q

GND

2CLR

2J

2K

2CLK

2PRE

2Q

2Q

Copyright

 2003, Texas Instruments Incorporated

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

On products compliant to MIL-PRF-38535, all parameters are tested

unless otherwise noted. On all other products, production

processing does not necessarily include testing of all parameters.