BETAMotor-supply ceiling36 V · VCC2 ≥ VCC1
Quadruple half-H motor driver
L293D Specifications
Review L293D electrical specifications, operating conditions and package details.
Key specifications
Four half-bridges provide two reversible output pairs. The L293D includes clamp diodes, but current, supply energy and heat still need a suitable design.
Half-H drivers4 Two full bridges
Per-channel continuous current600 mA · thermal limits apply
Ambient range0–70 °C
Package details
L293DNE · PDIP-16
| Property | Details |
|---|---|
| Manufacturer | Texas Instruments |
| Part number | L293DNE |
| Package | PDIP-16 |
| Connections | 16 pins |
| Mounting | Through-hole |
| Lead pitch | 2.54 mm |
| Package code | dip |
| Thermal reference | Board and package dependent; see manufacturer data |
Operating conditions
TI L293DNE
Manufacturer specifications 6 parameters
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| Parameter | Value | Conditions / notes |
|---|---|---|
| Logic supply VCC1 | 4.5–7 V | Use 5 V in this example |
| Motor supply VCC2 | VCC1 to 36 V | Separate motor power rail |
| Ambient temperature | 0 to 70°C | Operating range |
| Input HIGH | ≥2.3 V | At VCC1 = 5 V |
| Input LOW | ≤1.5 V | Use normal 0 V logic LOW |
| Ground connections | 4, 5, 12, 13 | All required; also conduct heat |
No specifications match. Try a parameter name or a unit.
Do not confuse L293D current ratings with the higher-current L293.
Motor A control table
Motor between 1Y3 and 2Y6
Manufacturer specifications 5 parameters
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| Parameter | Value | Conditions / notes |
|---|---|---|
| EN LOW; A1/A2 any | Coast · outputs Z / Z | No commanded drive; clamp paths remain |
| EN HIGH; A1 HIGH, A2 LOW | Direction A | 1Y HIGH; 2Y LOW |
| EN HIGH; A1 LOW, A2 HIGH | Direction B | 1Y LOW; 2Y HIGH |
| EN HIGH; A1 LOW, A2 LOW | Brake to GND | Both outputs LOW |
| EN HIGH; A1 HIGH, A2 HIGH | Brake to motor rail | Both outputs HIGH |
No specifications match. Try a parameter name or a unit.
Physical clockwise direction depends on motor wiring. Braking does not stop motion instantaneously.
Current and voltage drop
L293D
Manufacturer specifications 6 parameters
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| Parameter | Value | Conditions / notes |
|---|---|---|
| Continuous output current | ±600 mA per channel | Respect package thermal constraints |
| HIGH output at −0.6 A | VCC2 − 1.4 V typical | VCC2 − 1.8 V minimum |
| LOW output at +0.6 A | 1.2 V typical | 1.8 V maximum |
| Typical bridge loss at 0.6 A | 1.56 W | 0.6 A × (1.4 + 1.2 V), excluding logic losses |
| Typical motor voltage at 12 V | 9.4 V at 0.6 A | 12 − 1.4 − 1.2; not a regulated output |
| Clamp diodes | Built in | Inductive transient current returns to the rails |
No specifications match. Try a parameter name or a unit.
Voltage drops depend on current and temperature. The 9.4 V example is not valid for every load.
One-motor example
5 V logic · 12 V motor rail
Manufacturer specifications 7 parameters
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| Parameter | Value | Conditions / notes |
|---|---|---|
| Enable1 | Controller output with 10 kΩ pull-down | Motor disabled while controller output floats |
| Direction inputs2 and7 | Defined controller outputs | Change direction with a suitable stop/dead-time strategy |
| Motor leads | Outputs3 and6 | Choose a motor with acceptable stall current |
| Logic bypass | 100 nF | VCC1 pin16 to GND |
| Motor bypass | 100 nF + suitable bulk capacitor | VCC2 pin8 to GND; example bulk 100 µF |
| Unused bridge | Pins9,10,15 LOW | Outputs11 and14 open |
| Return | Controller, both supplies and all GND pins | Common reference |
No specifications match. Try a parameter name or a unit.
Bulk capacitance is an example; account for wiring, motor energy and the supply’s ability to absorb current.
Package and stress limits
L293DNE
Manufacturer specifications 5 parameters
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| Parameter | Value | Conditions / notes |
|---|---|---|
| Reviewed package | PDIP-16 | TI L293DNE; 2.54 mm lead pitch |
| Peak output current | ±1.2 A | Nonrepetitive; duration ≤100 µs; stress rating |
| Maximum junction temperature | 150°C | Absolute maximum; design for lower operating temperature |
| Storage temperature | −65 to +150°C | Unpowered |
| Board thermal resistance | 36.4°C/W reference | TI JEDEC test-board condition; real layout differs |
No specifications match. Try a parameter name or a unit.
This page does not substitute a different manufacturer’s SMD package or pin map.
Connections by function
Select a pin for its function, connection guidance and electrical notes.