Datasheet L293E, L293B Datasheet (SGS Thomson Microelectronics)

PUSH-PULL FOURCHANNEL DRIVERS

.OUTPUT CURRENT 1APER CHANNEL

.PEAK OUTPUTCURRENT 2A PER CHANNEL

(nonrepetitive)

.INHIBITFACILITY

.HIGHNOISE IMMUNITY

.SEPARATELOGICSUPPLY

.OVERTEMPERATURE PROTECTION

L293B

L293E

DIP16

DESCRIPTION

The L293Band L293E are quad push-pulldrivers
capableofdeliveringoutputcurrentsto1Aperchan­nel.Eachchanneliscontrolledbya TTL-compatible
logicinput andeach pair of drivers(a fullbridge) is
equippedwith an inhibitinput whichturnsoffallfour
transistors.A separatesupply input is provided for
the logicso that itmay be run offa lowervoltageto
reducedissipation.

Additionally,the L293E has externalconnectionof
sensingresistors, for switchmode control.

TheL293BandL293Earepackagein16and20-pin
plasticDIPs respectively; both use the four center
pinsto conductheat to the printedcircuitboard.

PIN CONNECTIONS

DIP16 - L293B POWERDIP (16+2+2) - L293E

ORDERING NUMBER : L293B

POWERDIP (16 + 2+ 2)

ORDERING NUMBER : L293E

April1993

1/12

L293B - L293E

BLOCK DIAGRAMS

DIP16 - L293B

POWERDIP (16+2+2) - L293E

2/12

SCHEMATIC DIAGRAM

L293B - L293E

(*) In the L293 these points are not externally available. They are internally connected to the ground (substrate).
O Pins of L293 () Pins of L293E.

3/12

L293B - L293E

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

V

V

I

P

T

stg,Tj

THERMAL DATA

Symbol Parameter Value Unit

R

th j-case

R

th j-amb

ELECTRICAL CHARACTERISTICS

For each channel, V

Symbol Parameter Test Conditions Min. TYp. Max. Unit

V

V

I

V

V

I
V
V

I

inhL

I

inhH

V

CEsatH

V

CEsatL

V

SENS

t

t

* See figure 1
** Referred to L293E

Supply Voltage 36 V

s

Logic Supply Voltage 36 V

ss

V

Input Voltage 7 V

i

Inhibit Voltage 7 V

inh

Peak Output Current (non repetitive t = 5ms) 2 A

out

Total Power Dissipation at T

tot

ground-pins

=80oC5W

Storage and Junction Temperature –40 to +150

Thermal Resistance Junction-case Max. 14
Thermal Resistance Junction-ambient Max. 80

= 24V, VSS= 5V, T

S

Supply Voltage V

s

Logic Supply Voltage 4.5 36 V

ss

I

Total Quiescent Supply Current Vi=L Io=0 V

s

Total Quiescent Logic Supply Current Vi=L Io=0 V

ss

Input Low Voltage -03. 1.5 V

iL

Input High Voltage VSS≤ 7V

iH

I

Low Voltage Input Current Vil= 1.5V -10 µA

iL

High Voltage Input Current 2.3V ≤ VIH≤ Vss- 0.6V 30 100 µA

iH

Inhibit Low Voltage -0.3 1.5 V

inhL

Inhibit High Voltage VSS≤ 7V

inhH

Low Voltage Inhibit Current V
High Voltage Inhibit Current 2.3V ≤ V

=25oC, unless otherwise specified

amb

=H

=H Io=0 V

V

i

=H Io=0 V

V

i

>7V

V

ss

>7V

V

ss

= 1.5V -30 -100 µA

inhL

≤ Vss- 0.6V ±10 µA

inhH

V

V

inh
inh
inh

inh
inh
inh

=H
=L

=H
=H
=L

ss

2

16
44

16
16

2.3

2.3

2.3

2.3

Source Output Saturation Voltage Io= -1A 1.4 1.8 V
Sink Output Saturation Voltage Io= 1A 1.2 1.8 V
Sensing Voltage (pins 4, 7, 14, 17) (**) 2 V

t

Rise Time 0.1 to 0.9 Vo(*) 250 ns

r

t

Fall Time 0.9 to 0.1 Vo(*) 250 ns

f

Turn-on Delay 0.5 Vito 0.5 Vo(*) 750 ns

on

Turn-off Delay 0.5 Vito 0.5 Vo(*) 200 ns

off

o
o

36 V

6

24

4

60
22
24

V

ss

7

V

ss

7

o

C

C/W
C/W

mA

mA

V

V

TRUTH TABLE

Vi(each channel) V

H

L

H

L

(*) High output impedance
(**) Relative to the considerate channel

4/12

H

X(
X(

(∞)

o

V

inh

H

L

o

)

o

)

H

L
L

Figure1: Switchin g Timer s

L293B - L293E

Figure2: Saturation voltage versus Output

Current

Figure4: Sink Saturation Voltag e versus

Ambient Temperature

Figure 3 : Source Saturation Voltage versus

Ambient Temperature

Figure 5 : Quiescent Logic Supply Current

versus L ogic Supply V oltage

5/12

L293B - L293E

Figure6: Output Voltage versus

Input V oltage

APPLICATION INFORMATION
Figure 8 : DC Motor Controls

(with connection to ground a nd
to the supply voltage)

Figure 7 : Output Voltage versus

Inhibit Voltage

Figure 9 : Bidirectional DC Motor Control

AM1BM2

V

inh

H H Fast Motor Stop H Run
H L Run L Fast Motor Stop

L X Free Running

Motor Stop

L = Low H = High X = Don’t Care

6/12

X Free Running

Motor Stop

Inputs Function

= H C = H ; D = L Turn Right

V

inh

C = L; D = H Turn Left
C = D Fast Motor Stop

= L C = X ; D = X Free Running

V

inh

L = Low H = High X = Don’t Care

Motor Stop

Figure 10 : Bipolar Stepping Motor Cont rol

L293B - L293E

7/12

L293B - L293E

Figure11:Stepping Motor Driver with Phase Current Control and Short Circuit Prot ection

8/12

L293B - L293E

MOUNTINGINSTRUCTIONS

TheR

oftheL293B and the L293Ecan be re-

th j-amb

ducedbysolderingthe GNDpinsto a suitablecop­per areaoftheprintedcircuit boardas shownin fig­ure12 or to an externalheatsink (figure13).

Figure12:Example of P.C. Board Coppe r

Area which is Used as Heatsink

During soldering the pins temperaturemust not ex­ceed 260oC and the soldering time must not be
longerthan 12 seconds.
Theexternalheatsinkor printed circuit copperarea
must be connectedto electrical ground.

Figure 13 : Exte rnal Heatsink Mou nting Ex-

ample (Rth = 30

o

C/W)

9/12

L293B - L293E

DIP16 PACKAGE MECHANICAL DATA

Dimensions

Min. Typ. Max. Min. Typ. Max.

a1 0.51 0.020

B 0.77 1.65 0.030 0.065
b 0.5 0.020

b1 0.25 0.010

D 20 0.787

E 8.5 0.335
e 2.54 0.100

e3 17.78 0.700

F 7.1 0.280

i 5.1 0.201
L 3.3 0.130
Z 1.27 0.050

Millimeters Inches

DIP16PW.TBL

10/12

a1

I

L

b

B

e

Z

e3

D

16

9

F

18

b1

E

PMDIP16W.EPS

POWERDIP (16+2+2) PACKAGE MECHANICAL DATA

L293B - L293E

Dimensions

Millimeters Inches

Min. Typ. Max. Min. Typ. Max.

a1 0.51 0.020

B 0.85 1.4 0.033 0.055
b 0.5 0.020

b1 0.38 0.5 0.015 0.020

D 24.8 0.976

E 8.8 0.346
e 2.54 0.100

e3 22.86 0.900

F 7.1 0.280

i 5.1 0.201
L 3.3 0.130
Z 1.27 0.050

DIP20PW.TBL

I

a1

L

Z

b

e3

D

20 11

110

B

e

Z

F

E

b1

PMDIP20WEPS

11/12

L293B - L293E

Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for
the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its
use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifica­tions mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information pre­viously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or
systems withoutexpress written approval of SGS-THOMSON Microelectronics.

 1994 SGS-THOMSON Microelectronics - All Rights Reserved

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