Four half-H drivers in one DIP-16, the classic way to spin small DC and bipolar stepper motors from a microcontroller. The four channels pair into two full H-bridges, each pair gated by an enable (1,2EN and 3,4EN), so it runs two DC motors bidirectionally or one bipolar stepper. Unlike the plain L293, the D version has the flyback clamp diodes built in, so inductive loads like relays, solenoids, and motors need no external diodes. It sources up to 600 mA per channel (1.2 A peak) with a separate motor supply (VCC2) up to 36 V and 5 V logic (VCC1). The four center GND pins double as a heat sink.

Pinout

Pin	Name	Type	Function
1	1,2EN	input	Active-high enable for driver channels 1 and 2. When high, drivers 1 and 2 are enabled and outputs track their inputs; when low, outputs 1Y and 2Y are in high-impedance (off). TTL compatible, tolerant up to 7 V.
2	1A	input	Noninverting driver input for channel 1. TTL-compatible logic input; VIH ≥ 2.3 V, VIL ≤ 1.5 V. Controls state of output 1Y when 1,2EN is high.
3	1Y	output	Half-H driver output for channel 1. Totem-pole output with Darlington sink and pseudo-Darlington source, supplies up to 600 mA continuous / 1.2 A peak at VCC2 (4.5 V to 36 V). Internal output clamp diodes provide inductive-transient suppression on L293D.
4	GND	power_in	Device ground and heat-sink pin. Connect to PCB ground plane with multiple solid vias; pins 4, 5, 12, and 13 are all tied to the internal heat-sink lead frame and share thermal duty.
5	GND	power_in	Device ground and heat-sink pin. Connect to PCB ground plane with multiple solid vias; pins 4, 5, 12, and 13 are all tied to the internal heat-sink lead frame and share thermal duty.
6	2Y	output	Half-H driver output for channel 2. Totem-pole output with Darlington sink and pseudo-Darlington source, supplies up to 600 mA continuous / 1.2 A peak at VCC2 (4.5 V to 36 V). Internal output clamp diodes provide inductive-transient suppression on L293D.
7	2A	input	Noninverting driver input for channel 2. TTL-compatible logic input; VIH ≥ 2.3 V, VIL ≤ 1.5 V. Controls state of output 2Y when 1,2EN is high.
8	VCC2	power_in	Output-stage (driver) supply, 4.5 V to 36 V. Sets the swing of all four Y outputs and supplies motor/load current up to 600 mA continuous per channel (1.2 A peak) on L293D. Bypass locally to GND with bulk + ceramic capacitors.
9	3,4EN	input	Active-high enable for driver channels 3 and 4. When high, drivers 3 and 4 are enabled and outputs track their inputs; when low, outputs 3Y and 4Y are in high-impedance (off). TTL compatible, tolerant up to 7 V.
10	3A	input	Noninverting driver input for channel 3. TTL-compatible logic input; VIH ≥ 2.3 V, VIL ≤ 1.5 V. Controls state of output 3Y when 3,4EN is high.
11	3Y	output	Half-H driver output for channel 3. Totem-pole output with Darlington sink and pseudo-Darlington source, supplies up to 600 mA continuous / 1.2 A peak at VCC2 (4.5 V to 36 V). Internal output clamp diodes provide inductive-transient suppression on L293D.
12	GND	power_in	Device ground and heat-sink pin. Connect to PCB ground plane with multiple solid vias; pins 4, 5, 12, and 13 are all tied to the internal heat-sink lead frame and share thermal duty.
13	GND	power_in	Device ground and heat-sink pin. Connect to PCB ground plane with multiple solid vias; pins 4, 5, 12, and 13 are all tied to the internal heat-sink lead frame and share thermal duty.
14	4Y	output	Half-H driver output for channel 4. Totem-pole output with Darlington sink and pseudo-Darlington source, supplies up to 600 mA continuous / 1.2 A peak at VCC2 (4.5 V to 36 V). Internal output clamp diodes provide inductive-transient suppression on L293D.
15	4A	input	Noninverting driver input for channel 4. TTL-compatible logic input; VIH ≥ 2.3 V, VIL ≤ 1.5 V. Controls state of output 4Y when 3,4EN is high.
16	VCC1	power_in	Logic supply for internal input translation, 4.5 V to 7 V (nominal 5 V). Kept separate from VCC2 to minimize device power dissipation. Bypass locally to GND with a ceramic capacitor.

Key specifications

Parameter	Value
Type	Quadruple half-H driver
Configuration	4 half-bridges (2 full H-bridges)
Output current	600 mA/ch (1.2 A peak)
Motor supply (VCC2)	up to 36 V
Logic supply (VCC1)	4.5-7 V
Clamp diodes	internal (the D)
Enables	1,2EN and 3,4EN
Package	PDIP-16 (GND = heat sink)

Ordering variants

Same part, different packaging or reel option.

L293DNE (PDIP-16)
L293DNEE4 (PDIP-16)

CAD (KiCad official)

Symbol: Driver_Motor:L293D
Footprint: Package_DIP:DIP-16_W7.62mm
3D model: DIP-16 (KiCad packages3D)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Texas Instruments datasheet (19 pp, sha256 ee1e8923495a2c0d, retrieved 2026-08-17, tier: manufacturer)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF