HIT HD74HC109 Datasheet

HD74HC109

Dual J-K Flip-Flops (with Preset and Clear)

Description

Each flip-flop has independent J, K, preset, clear and clock inputs and Q and Q outputs. This device is
edge sensitive to the clock input and changes state on the positive going transition of the clock pulse. Clear
and preset are independent of the clock and accomplished by a low logic level on the corresponding input.

Features

• High Speed Operation: tpd (Clock to Q) = 15 ns typ (CL = 50 pF)

• High Output Current: Fanout of 10 LSTTL Loads

• Wide Operating Voltage: VCC = 2 to 6 V

• Low Input Current: 1 µA max

• Low Quiescent Supply Current: ICC (static) = 2 µA max (Ta = 25°C)

Function Table

Inputs Output
Preset Clear Clock J K Q Q

LHXXXHL
HLXXXL H
LLXXXH*
HH LLLH

HH H L Toggle
HH LHQ
HH HHHL
HHLXXQ

Note: 1. Q and Q will remain high as long as preset and clear input are low, but Q and Q are

unpredictable if preset and clear input go high simultaneously.

1

0

0

1

H*

Q

0

Q

0

HD74HC109

(

)

Pin Arrangement

Block Diagram (1/2)

PR

CLR

J

K

1CLR

1

21J

J K

31K

CK

CLRPR

16

V

CC

2CLR15

2J14

Q Q

41CK

51PR

K J

61Q

CK

PRCLR

2K13

2CK12

2PR11

Q Q

71Q

8GND

2Q10

2Q9

Top view

C

C

C

C

C

C

Q

Q

C

CK

C

C

C

2

HD74HC109

DC Characteristics

Ta = –40 to

Ta = 25°C

Item Symbol V

Input voltage V

IH

(V) Min Typ Max Min Max Unit Test Conditions

CC

2.0 1.5 — — 1.5 — V

4.5 3.15 — — 3.15 —

6.0 4.2 — — 4.2 —

V

IL

2.0 — — 0.5 — 0.5 V

4.5 — — 1.35 — 1.35

6.0 — — 1.8 — 1.8

Output voltage V

OH

2.0 1.9 2.0 — 1.9 — V Vin = VIH or VILIOH = –20 µA

4.5 4.4 4.5 — 4.4 —

6.0 5.9 6.0 — 5.9 —

4.5 4.18 — — 4.13 — IOH = –4 mA

6.0 5.68 — — 5.63 — IOH = –5.2 mA

V

OL

2.0 — 0.0 0.1 — 0.1 V Vin = VIH or VILIOL = 20 µA

4.5 — 0.0 0.1 — 0.1

6.0 — 0.0 0.1 — 0.1

4.5 — — 0.26 — 0.33 IOL = 4 mA

6.0 — — 0.26 — 0.33 IOL = 5.2 mA
Input current Iin 6.0 — — ±0.1 — ±1.0 µA Vin = VCC or GND
Quiescent supply

I

CC

6.0 — — 2.0 — 20 µA Vin = VCC or GND, Iout = 0 µA
current

+85°C

3