8/94
•Output Current 1A Per Channel (600mA
for L293D)
•Peak Output Current 2A Per Channel
(1.2A for L293D)
•Inhibit Facility
•High Noise Immunity
•Separate Logic Supply
•Over-Temperature Protection
Push-Pull Four Channel Driver
L293
L293D
VI VINH* VO
(each ch anne l)
HHH
LHL
HLX**
LLX**
*Rela tive to t he co nsider ed ch anne l
**High outpu t impede nce
FEATURES The L293 and L293D are quad push-pull drivers capable of delivering
output currents to 1A or 600mA p er channel respectively. Each channel
is controll ed by a TTL-compatible logic input and each pair of drivers (a
full bri dge) is equipped with an inhibit input which turns off all four tran-
sistors. A separate supply i nput is provided for the logic so that it may
be run off a lower voltage to reduce dissipation.
Additionally the L293D incl udes the output clampi ng diodes within the
IC for complet e interfacing with inductive loads.
Both devi ces are avai lable in 16 -pin Batwing DIP packages. They are
also available in Power S0IC and Hermetic DIL packages.
DESCRIPTION
BLOCK DIAGRAM
TRUTH TABLE
Note: O utput diodes are internal in L293D.
Co llector Supply Voltag e, V C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36V
L ogic Supp ly Voltag e, V SS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36V
In put Voltage, VI. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Inhibit Volt age, VINH. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Pe ak Out put Current (Non-Repet it iv e), lOUT (L293 ) . . . . . . . . . . . . . . 2A
lOUT (L293D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2A
T otal Power Dissipation
at Tg rou nd- pins = 80°C, N Batw ing pkg, (No te) . . . . . . . . . . . . . . . 5W
St or a ge and J unctio n Te m pe r at ure, Tst g, T J. . . . . . . . . . -40 to +150°C
No te :Co nsult packaging se ct ion of Data book for therm al l imitat ions and
considerations of packages.
ABSOL UTE MAXIMUM RATING S
L293
L293D
ELECTRI CAL CHARACTIS TI CS:
(For each channel, VC = 24V, VSS = 5 V, TAMB = 25°C, unless otherwise specified; TA = TJ)
PARAMETER SYMBOL T EST CONDIT ION MIN. TYP. MAX. UNIT S
Co llector Supply Voltag e V C36 V
Logic Supp ly Voltage V SS 4.5 36 V
Co llector Supply Current I CVI = L, IO = 0, VINH = H 2 6 mA
VI = H, IO = 0, VINH = H 1 6 2 4 mA
VINH = L 4 mA
T otal Qu ie scen t Logic Supply Cur re nt ISS VI = L, IO = 0, V INH = H 4 4 60 mA
VI = H, IO = 0, VINH = H 16 22 mA
VINH = L 1 6 24 mA
Input Low Voltage VIL -0.3 1.5 V
Input High Voltage VIH VSS ≤ 7V 2.3 VSS V
VSS ≥ 7V 2.3 7 V
L ow Volta ge Input Cur ren t I IL VI = 0V -10 µA
High Voltage Input Current IIH V I = 4.5V 30 100 µA
Inh ib it Low Volt age V INH, L -0.3 1.5 V
Inh ib it High Voltage V INH, H VSS ≤ 7V 2.3 VSS V
VSS >7V 2.3 7 V
L ow Volta ge Inhibit Curr ent VINH, L -30 -100 µA
High Voltag e Inhibit Cur re nt V INH, H 10 µA
So urc e Out put Sat ura tion Voltag e V CEsatH IO = -1A (-0.6 A for L293D) 1.4 1.8 V
Sink Output Satura tion Voltage VCEsatL IO = 1A (0.6 A for L293 D) 1.2 1.8 V
Clamp Diode Forwa rd Voltage (L29 3D only) VFIF = 0.6A 1.3 V
Rise Ti me TR0. 1 t o 0. 9 V O (Se e Figur e 1) 100 ns
Fall Time TF0. 9 t o 0. 1 V O (Se e Figure 1) 350 n s
Turn-on Delay TON 0. 5 V I t o 0.5 V O (See Fig ure 1) 750 n s
Turn -off Delay TOFF 0. 5 V I to 0. 5 V O (See Figure 1) 200 ns
DIL-16 (TOP VI EW)
N Package, SP Package SOI C-28 (TO P VIEW)
DWP Package
CONNECTI ON DIAGRAMS
2
SCHEMATIC DIAGRAM
L293
L293D
Figure 1: Switching Times Fig ure 2: Quiescent Logic Supply
Current vs Lo g ic Su ppl y Volt age
Fi gure 3: Ou tp ut Vo lt ag e vs
Input Volta ge
Figu re 4: L293 Satur atio n vs
Ou tpu t Currr ent Fig ure 5: L293 Source Sat ura tion vs
Ambie nt Temper atu re
Figur e 6: L293 Sink Saturati on
Vol tage vs Ambi ent Tem per atu re
APPLICATION INFORMATION
NOTE: For L293D cu rve s, multiply out put curre nt b y 0.6.
3
F igure 8: Bidi rec tiona l DC Motor Cont ro l
VINH AM1BM2
H H Fast Moto r Stop H Run
H L Run L Fast Motor Stop
LXFree Running
Motor Stop XFree Running
Motor Stop
INPUTS FUNCTION
VINH = H C = H; D = L Turn Right
C = L ; D = H Turn Left
C = D Fast Motor Stop
VINH = L C = X; D = X Free Running Motor
Stop
Figur e 7: DC Motor Con trol s (with Co nnection t o
Gr ound and to Suppl y Voltage)
Figur e 9: Bipol ar Step pi ng Moto r Cont ro l
APPLICATION INFORMATION (Cont.)
L293
L293D
L = Low H = High X = Don’t Care L = Low H = High X = Don’t Care
4
L293
L293D
Figur e 11: Extern al Heats in k Mo unt in g Exampl e ( θθJA =
25°C/W)
Figur e 12: Maxi mu m Package Pow er and Junction t o
Ambient Thermal Resistance Figur e 13 : Maxi m um Allo w abl e Pow e r Dissi p a tion v s
Ambient Temperature
Figur e 10: Exampl e of P.C. Board Copp er Area wh ic h is
used as Heatsink
The Rthj-amp of the L293 can be reduced by soldering
the GN D pins to a su itabl e co pper area of the printed cir-
cuit board or to an external heatsink.
The diagram of Figure 13 shows the maximum package
power Ptot and the θJA as a functi on of the side "l" of two
equal square copper areas having a th ickness of 35µ (see
Figure 10). In addition, it is possible to use an external
heatsink (see Figure 11).
During soldering the pins’ temperature must not exceed
260°C and th e soldering time must not be longer than 12
seconds.
The external heatsink or printed circuit copper area must
be connected to electrica l ground.
MOUNTING INSTRUCTIONS
UNITRODE INTEGRATED CIRCUITS
7 CONTINENTAL BLVD. • MERRIMACK, NH 03054
TEL. (603) 424-2410 • F AX (603) 424-3460
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