L293, L293D QUADRUPLE HALF-H DRIVERS

L293, L293D
QUADRUPLE HALF-H DRIVERS

SLRS008B – SEPTEMBER 1986 – REVISED JUNE 2002

D Featuring Unitrode L293 and L293D N, NE PACKAGE
(TOP VIEW)
Products Now From Texas Instruments
1,2EN 1 16 VCC1
D Wide Supply-Voltage Range: 4.5 V to 36 V 1A 2 15 4A
D Separate Input-Logic Supply 1Y 3 14 4Y
D Internal ESD Protection 4
D Thermal Shutdown HEAT SINK AND 5 13 HEAT SINK AND
D High-Noise-Immunity Inputs GROUND 6 12 GROUND
D Functional Replacements for SGS L293 and 2Y 7
2A 8 11 3Y
SGS L293D VCC2 10 3A
9 3,4EN
D Output Current 1 A Per Channel
DWP PACKAGE
(600 mA for L293D) (TOP VIEW)

D Peak Output Current 2 A Per Channel 1,2EN 1 28 VCC1
1A 2 27 4A
(1.2 A for L293D) 1Y 3 26 4Y
NC 4 25 NC
D Output Clamp Diodes for Inductive NC 5 24 NC
NC 6 23 NC
Transient Suppression (L293D) 7
HEAT SINK AND 8 22 HEAT SINK AND
description GROUND 9 21 GROUND
10 20
The L293 and L293D are quadruple high-current NC 11 19 NC
half-H drivers. The L293 is designed to provide NC 12 18 NC
bidirectional drive currents of up to 1 A at voltages 2Y 13 17 3Y
from 4.5 V to 36 V. The L293D is designed to 2A 14 16 3A
provide bidirectional drive currents of up to VCC2 15 3,4EN
600-mA at voltages from 4.5 V to 36 V. Both
devices are designed to drive inductive loads such
as relays, solenoids, dc and bipolar stepping
motors, as well as other high-current/high-voltage
loads in positive-supply applications.

All inputs are TTL compatible. Each output is a complete totem-pole drive circuit, with a Darlington transistor
sink and a pseudo-Darlington source. Drivers are enabled in pairs, with drivers 1 and 2 enabled by 1,2EN and
drivers 3 and 4 enabled by 3,4EN. When an enable input is high, the associated drivers are enabled and their
outputs are active and in phase with their inputs. When the enable input is low, those drivers are disabled and
their outputs are off and in the high-impedance state. With the proper data inputs, each pair of drivers forms
a full-H (or bridge) reversible drive suitable for solenoid or motor applications.

On the L293, external high-speed output clamp diodes should be used for inductive transient suppression.

A VCC1 terminal, separate from VCC2, is provided for the logic inputs to minimize device power dissipation.
The L293and L293D are characterized for operation from 0°C to 70°C.

L293, L293D
QUADRUPLE HALF-H DRIVERS

block diagram VCC1

M 1 16 1 M
01 0 M
VC 12 15
NOTE: Output diodes are internal in L293D. 0 1
4 0
1 14 1
3 13 0
12
4
11
5
3
6 10
9
2
17
0

8

TEXAS INSTRUMENTS
AVAILABLE OPTIONS

PACKAGE

TA PLASTIC
DIP

(NE)

0°C to 70°C L293NE
L293DNE

AVAILABLE OPTIONS

PACKAGED DEVICES

TA SMALL PLASTIC
OUTLINE DIP

(DWP) (N)

0°C to 70°C L293DWP L293N
L293DDWP L293DN

The DWP package is available taped and reeled. Add
the suffix TR to device type (e.g., L293DWPTR).

L293, L293D
QUADRUPLE HALF-H DRIVERS

FUNCTION TABLE
(each driver)

INPUTS† OUTPUT
A EN Y

HH H

LH L

XL Z

H = high level, L = low level, X = irrelevant,

Z = high impedance (off)
† In the thermal shutdown mode, the output is

in the high-impedance state, regardless of

the input levels.

logic diagram ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

1A 2 3 1Y
1,2EN 1 6 2Y
7 11 3Y
2A 14 4Y

3A 10
3,4EN 9
15
4A

schematics of inputs and outputs (L293)

EQUIVALENT OF EACH INPUT TYPICAL OF ALL OUTPUTS
VCC1
VCC2
Current
Source

Input Output

GND

GND

L293, L293D TYPICAL OF ALL OUTPUTS
QUADRUPLE HALF-H DRIVERS VCC2

schematics of inputs and outputs (L293D) Output

EQUIVALENT OF EACH INPUT
VCC1

Current
Source

Input

GND

GND

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†

Supply voltage, VCC1 (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 V
Output supply voltage, VCC2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 V
Input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Output voltage range, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –3 V to VCC2 + 3 V
Peak output current, IO (nonrepetitive, t ≤ 5 ms): L293 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±2 A
Peak output current, IO (nonrepetitive, t ≤ 100 µs): L293D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 1.2 A
Continuous output current, IO: L293 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±1 A
Continuous output current, IO: L293D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 600 mA
Continuous total dissipation at (or below) 25°C free-air temperature (see Notes 2 and 3) . . . . . . . 2075 mW
Continuous total dissipation at 80°C case temperature (see Note 3) . . . . . . . . . . . . . . . . . . . . . . . . . 5000 mW
Maximum junction temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C

† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES: 1. All voltage values are with respect to the network ground terminal.

2. For operation above 25°C free-air temperature, derate linearly at the rate of 16.6 mW/°C.
3. For operation above 25°C case temperature, derate linearly at the rate of 71.4 mW/°C. Due to variations in individual device electrical

characteristics and thermal resistance, the built-in thermal overload protection may be activated at power levels slightly above or

below the rated dissipation.

L293, L293D
QUADRUPLE HALF-H DRIVERS

recommended operating conditions

MIN MAX UNIT

Supply voltage VCC1 4.5 7 V
VCC2
VIH High-level input voltage VCC1 ≤ 7 V VCC1 36 V
VIL Low-level output voltage VCC1 ≥ 7 V 2.3 VCC1 V
V
2.3 7
–0.3† 1.5

TA Operating free-air temperature 0 70 °C

† The algebraic convention, in which the least positive (most negative) designated minimum, is used in this data sheet for logic voltage levels.

electrical characteristics, VCC1 = 5 V, VCC2 = 24 V, TA = 25°C

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

VOH High-level output voltage L293: IOH = –1 A VCC2–1.8 VCC2–1.4 V
L293D: IOH = – 0.6 A
VOL Low-level output voltage L293: IOL = 1 A 1.2 1.8 V
L293D: IOL = 0.6 A V
VOKH High-level output clamp voltage L293D: IOK = – 0.6 A VCC2 + 1.3 V
VOKL L293D: IOK = 0.6 A 1.3 µA
Low-level output clamp voltage 0.2 µA
IIH VI = 7 V 0.2
High-level input current A –3 100 mA
EN –2 10
13 mA
A 35 –10
IIL Low-level input current VI = 0 8 –100
EN 14
2 22
All outputs at high level 2 60
24
ICC1 Logic supply current IO = 0 All outputs at low level 24
All outputs at high impedance
6
All outputs at high level 4

ICC2 Output supply current IO = 0 All outputs at low level
All outputs at high impedance

switching characteristics, VCC1 = 5 V, VCC2 = 24 V, TA = 25°C

PARAMETER TEST CONDITIONS L293NE, L293DNE UNIT
MIN TYP MAX
tPLH Propagation delay time, low-to-high-level output from A input CL = 30 pF, See Figure 1 ns
tPHL Propagation delay time, high-to-low-level output from A input 800 ns
tTLH Transition time, low-to-high-level output 400 ns
tTHL Transition time, high-to-low-level output 300 ns
300

switching characteristics, VCC1 = 5 V, VCC2 = 24 V, TA = 25°C

PARAMETER TEST CONDITIONS L293DWP, L293N UNIT
L293DDWP, L293DN
tPLH Propagation delay time, low-to-high-level output from A input CL = 30 pF, See Figure 1 ns
tPHL Propagation delay time, high-to-low-level output from A input MIN TYP MAX ns
tTLH Transition time, low-to-high-level output 750 ns
tTHL Transition time, high-to-low-level output 200 ns
100
350

L293, L293D
QUADRUPLE HALF-H DRIVERS

PARAMETER MEASUREMENT INFORMATION

Input 5 V 24 V 90% tf tr 3V
Input 50% 10% 90% 0
50%

10%

Pulse VCC1 VCC2 tw tPLH
Generator A tPHL 90% VOH
(see Note B)
Y VOL
Output 90% tTLH

3 V EN CL = 30 pF 50% 50%
(see Note A) 10% 10%
Output

tTHL

TEST CIRCUIT VOLTAGE WAVEFORMS

NOTES: A. CL includes probe and jig capacitance.
B. The pulse generator has the following characteristics: tr ≤ 10 ns, tf ≤ 10 ns, tw = 10 µs, PRR = 5 kHz, ZO = 50 Ω.

Figure 1. Test Circuit and Voltage Waveforms

L293, L293D
QUADRUPLE HALF-H DRIVERS

APPLICATION INFORMATION

10 kΩ 5V 24 V
VCC2
1,2EN VCC1
1 16 3

Control A 1A 1Y
Control B 23

2A Motor
7 2Y
6
3,4EN
9 3Y
11
3A
10

4A 4Y
15 14

Thermal
Shutdown

4, 5, 12, 13

GND

Figure 2. Two-Phase Motor Driver (L293)

L293, L293D
QUADRUPLE HALF-H DRIVERS

APPLICATION INFORMATION

5 V 24 V

10 kΩ VCC1 VCC2
16 3
1,2EN
1

Control A 1A 1Y
2 3

Control B 2A Motor
7 2Y
6
3,4EN
9 3Y
11
3A
10

4A 4Y
15 14

Thermal
Shutdown

4, 5, 12, 13
GND

Figure 3. Two-Phase Motor Driver (L293D)

L293, L293D
QUADRUPLE HALF-H DRIVERS

APPLICATION INFORMATION

VCC2 SES5001
M1
SES5001
M2

3A 4A EN 3A M1 4A M2
10 11 15
14 H H Fast motor stop H Run
8 16
VCC1 H L Run L Fast motor stop

L X Free-running motor X Free-running motor
stop stop
1/2 L293
9
EN
L = low, H = high, X = don’t care

4, 5, 12, 13
GND

Figure 4. DC Motor Controls
(connections to ground and to

supply voltage)

VCC2 2 × SES5001

M

2 × SES5001 EN 1A 2A FUNCTION

2A 1A H L H Turn right
7 2
63 H H L Turn left
8 16
VCC1 H L L Fast motor stop

H H H Fast motor stop

1/2 L293 1 L X X Fast motor stop
EN

4, 5, 12, 13 L = low, H = high, X = don’t care
GND

Figure 5. Bidirectional DC Motor Control

L293, L293D
QUADRUPLE HALF-H DRIVERS

APPLICATION INFORMATION

IL1/IL2 = 300 mA

C1 D1 1 L293 16 VCC1 D4
0.22 µF 2 + 15 D8

D5 + 14
3 13
VCC2 L1 IL1 4 12 L2 IL2
5 11

6 + D7 D3
10
+
7 9
8

D6 D2

D1–D8 = SES5001

Figure 6. Bipolar Stepping-Motor Control

mounting instructions

The Rthj-amp of the L293 can be reduced by soldering the GND pins to a suitable copper area of the printed
circuit board or to an external heatsink.

Figure 9 shows the maximum package power PTOT and the θJA as a function of the side of two equal square
copper areas having a thickness of 35 µm (see Figure 7). In addition, an external heat sink can be used (see
Figure 8).

During soldering, the pin temperature must not exceed 260°C, and the soldering time must not be longer than
12 seconds.

The external heatsink or printed circuit copper area must be connected to electrical ground.

L293, L293D
QUADRUPLE HALF-H DRIVERS

APPLICATION INFORMATION

Copper Area 35-µm Thickness

Printed Circuit Board

Figure 7. Example of Printed Circuit Board Copper Area
(used as heat sink)

17.0 mm

11.9 mm

38.0 mm

Figure 8. External Heat Sink Mounting Example
(θJA = 25°C/W)

L293, L293D
QUADRUPLE HALF-H DRIVERS

APPLICATION INFORMATION

MAXIMUM POWER AND JUNCTION MAXIMUM POWER DISSIPATION
vs
vs
AMBIENT TEMPERATURE
THERMAL RESISTANCE
4 80 5

P TOT – Power Dissipation – WθJA60 With Infinite Heat Sink
θJA – Thermal Resistance – °C/W3 4

P TOT – Power Dissipation – W3 Heat Sink With θJA = 25°C/W
2 PTOT (TA = 70°C) 40
1
2 Free Air

20
1

00 0 50 100 150
0 10 20 30 40 50 –50 0
Side – mm
TA – Ambient Temperature – °C
Figure 9
Figure 10