L293D Datasheet, PDF (1/5 Pages) STMicroelectronics – PUSH-PULL FOUR CHANNEL DRIVER WITH DIODES

• 600-mA Output Current Capability Per
Driver
• Pulsed Current 1.2-A Per Driver
• Output Clamp Diodes for Inductive
Transient Suppression
• Wide Supply Voltage Range
4.5 V to 36 V
• Separate Input-Logic Supply
• Thermal Shutdown
• Internal ESD Protection
• High-Noise-Immunity Inputs
• Functional Replacement for SGS L293D
description
The L293D is a quadruple high-current half-H
driver designed to provide bidirectional drive
currents of up to 600-mA at voltages from 4.5 V to
36 V. It is 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. External
high-speed output clamp diodes should be used
for inductive transient suppression. When the
enable input is low, those drivers are disabled, and
their outputs are off and in a high-impedance
state. With the proper data inputs, each pair of
drivers form a full-H (or bridge) reversible drive
suitable for solenoid or motor applications.
A V_CC1 terminal, separate from V_CC2, is provided
for the logic inputs to minimize device power
dissipation.
The L293D is designed for operation from 0°C
to 70°C.
L293D
QUADRUPLE HALF-H DRIVER
SLRS008A – SEPTEMBER 1986 – REVISED MAY 1990
NE PACKAGE
(TOP VIEW)
1, 2EN 1
1A 2
1Y 3
HEAT SINK AND
4
GROUND
5
2Y 6
2A 7
V_CC2 8
16 V_CC1
15 4A
14 4Y
13
HEAT SINK AND
12
GROUND
11 3Y
10 3A
9 3, 4EN
logic symbol^†
2
1A
1
EN
1, 2EN
EN
7
2A
10
3A
9
EN
3, 4EN
EN
15
4A
3
1Y
6
2Y
11
3Y
14
4Y
† _{This symbol is in accordance with ANSI/IEEE Std 91-1984}
and IEC Publication 617-12.
logic diagram
2
1A
1
1, 2EN
7
2A
3
1Y
6
2Y
10
3A
9
3, 4EN
15
4A
11
3Y
14
4Y
FUNCTION TABLE
(each driver)
INPUTS‡
A
EN
OUTPUT
Y
H
H
H
L
H
L
X
L
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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1990, Texas Instruments Incorporated
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