ST L293B, L293E User Manual
PUSH-PULL FOUR CHANNEL DRIVERS
■ OUTPUT CURRENT 1A PER CHANNEL
■ PEAK OUTPUT CURRENT 2A PER CHANNEL
(non repetitive)
■ INHIBIT FACILITY
■ HIGH NOISE IMMUNITY
■ SEPARATE LOGIC SUPPLY
■ OVERTEMPE R ATURE PR O TECTION
L293B
L293E
DIP16 POWERDIP(16 +2+2)
DESCRIPTION
The L293B and L293E are quad push-pull drivers
capable of delivering output currents to 1A per
channel. Each channel is controlled by a TTLcompatible logic input and each pair of drivers (a
full bridge) is equipped with an inhibit input which
turns off all four transistors. A separate supply input is provided for the logic so that it may be run
off a lower voltage to reduce dissipation.
Additionally, the L293E has external connection of
PIN CONNECTION (Top view)
DIP16 - L293B
ORDERING NUMBERS:
L293B L293E
sensing resistors, for switchmode control.
The L293B and L293E are pac kage in 16 and 20-
pin plastic DIPs respectively ; both use the four
center pins to conduct heat to the printed circuit
board.
POWERDIP (1 6+2 +2) - L293E
July 2003
1/12
L293E L293B
BLOCK DIAGRAMS
DIP16 - L293B
POWERDIP (1 6+2 +2) - L293E
2/12
SCHEMATIC DIAGRAM
L293E L293B
(*) In the L293 these point s are not externally avai l able. They are i nternall y connected to the ground (substrat e).
O Pins of L293 () Pins of L293E.
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
V
ss
V
V
inh
I
out
P
tot
T
stg
Supply Voltage 36 V
s
Logic Supply Voltage 36 V
Input Voltage 7 V
i
Inhibit Voltage 7 V
Peak Output Current (non repetitive t = 5ms) 2 A
Total Power Dissipation at T
ground-pins
= 80°C 5 W
, TjStorage and Junction Temperature –40 to +150
o
C
3/12
L293E L293B
THERMA L D ATA
Symbol Parameter Value Unit
R
th j-case
R
th j-amb
Thermal Resistance Junction-case Max. 14
Thermal Resistance Junction-ambient Max. 80
ELECTRICAL CHARACTERISTCS
Symbol Parameter Test Condition Min. Typ. Max. Unit
V
Supply Voltage
s
V
Logic Supply Voltage 4.5 36 V
ss
I
Total Quiescent Supply Current Vi = L; Io = 0; V
s
Total Quiescent Logic Supply
I
ss
Current
V
ViH
V
V
I
inhL
I
inhH
V
CEsatH
V
CEsatL
V
SENS
t
t
* See figure 1
** Referred to L293E
Input Low Voltage -0.3 1.5 V
iL
Input High Voltage VSS ≤ 7V 2.3
Low Voltage Input Current
I
iL
High Voltage Input Current 2.3V ≤ VIH ≤ VSS - 0.6V 30 100 µA
I
iH
Inhibit Low Voltage -0.3 1.5 V
inhL
Inhibit High Voltage VSS ≤7V 2.3
inhH
Low Voltage Inhibit Current V
High Voltage Inhibit Current 2.3V ≤V
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)
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 Vi to 0.5 Vo (*) 750 ns
on
Turn-off Delay 0.5 Vi to 0.5 Vo (*) 200 ns
off
= h; Io = 0; V
V
i
Vi = L; Io = 0; V
= h; Io = 0; V
V
i
V
> 7V
SS
V
= 1.5V
il
V
> 7V
SS
inhL
(**)
= H 2 6 mA
inh
= H 16 24 mA
inh
V
= L 4 mA
inh
= H 44 60 mA
inh
= H 16 22 mA
inh
V
= L 16 24 mA
inh
= 1.5V -30 -100 µA
≤ Vss- 0.6V ±10 µA
inhH
V
ss
2.3 7 V
2.3 7 V
o
o
36 V
Vss V
-10 µA
V
ss
2V
C/W
C/W
V
TRUTH TABLE
V
(each channel) V
i
HHH
LLH
H
L
(*) High output impedan ce
(**) Relative to the considerate c hannel
4/12
X
X
o
(*)
(*)
(**)
V
inh
L
L
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