TLC139, TLC339, TLC339Q

LinCMOS

™ MICROPOWER QUAD COMPARATORS

SLCS119 – DECEMBER 1986 – REVISED JANUARY 1991

15

POST OFFICE BOX 655303

APPLICATION INFORMATION

The inputs should always remain within the supply rails in order to avoid forward biasing the diodes in the electrostatic

discharge (ESD) protection structure. If either input exceeds this range, the device is not damaged as long as the

input current is limited to less than 5 mA. To maintain the expected output state, the inputs must remain within the

common-mode range. For example, at 25

assure proper device operation. To assure reliable operation, the supply should be decoupled with a capacitor (0.1

µF) positioned as close to the device as possible.

The output and supply currents require close observation since the TLC139/TLC339 does not provide current

protection. For example, each output can source or sink a maximum of 20 mA; however, the total current to ground

has an absolute maximum of 60 mA. This prohibits sinking 20 mA from each of the four outputs simultaneously since

the total current to ground would be 80 mA.

The TLC139 and TLC339 have internal ESD-protection circuits that prevent functional failures at voltages up to

2000 V as tested under MIL-STD-883C, Method 3015.2; however, exercise care when handling these devices as

exposure to ESD may result in the degradation of the device parametric performance.

Table of Applications

FIGURE

Pulse-width-modulated motor speed controller

19

Enhanced supply supervisor

20

Two-phase nonoverlapping clock generator

21

5 V

10 k

Ω

10 k

Ω

10 k

Ω

12 V

5.1 k

Ω

100 k

Ω

5 V

5 V

5 V

12 V

12 V

5.1 k

Ω

10 k

Ω

1/4

TLC139/TLC339

C1

0.01

µF

(see Note B)

(see Note A)

1/4

TLC139/339

Motor Speed Control

Potentiometer

Direction

Control

S1

SPDT

Half-H Driver

Half-H Driver

SN75603

DIR

EN

Motor

SN75604

NOTES: A. The recommended minimum capacitance is 10

µF to eliminate common ground switching noise.

B. Select C1 for change in oscillator frequency.

Figure 19. Pulse-Width-Modulated Motor Speed Controller