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L293/L293D Quadruple Half-H Drivers Datasheet Summary
1. Overview and Key Features
The L293 and L293D devices are quadruple high-current half-H drivers designed for driving inductive loads such as motors and relays. These devices are versatile and suitable for positive supply applications. Key features include:
- Wide Supply Voltage Range: 4.5V to 36V
- Built-in diodes for inductive load protection (L293D only)
- High noise immunity inputs
- ESD protection
- Capability to drive up to 1A per channel (L293) or 600mA per channel (L293D).
2. Pin Configuration and Functions
The L293/L293D devices come in a 16-pin PDIP package. Key pins include:
- 1,2EN and 3,4EN: Enable inputs for driver channels 1, 2 and 3, 4 respectively (active high input).
- <1:4>A: Non-inverting driver inputs for channels 1 through 4.
- <1:4>Y: Driver outputs corresponding to channels 1 through 4.
- GND: Ground and heat sink pin. Connect these to the PCB ground plane for proper operation.
- VCC1: Logic supply voltage input (5V typical).
- VCC2: Power supply input for driving the outputs, supports voltages from 4.5V to 36V.
3. Specifications
- Operating Voltage:
- VCC1: 4.5V to 7V (Logic Supply)
- VCC2: 4.5V to 36V (Power Supply)
- Output Current:
- Continuous output current: Up to 1A per channel for L293, 600mA per channel for L293D.
- Peak output current: Up to 2A (L293), 1.2A (L293D).
- ESD Protection Ratings:
- Human Body Model (HBM): ±2000V
- Charged Device Model (CDM): ±1000V
- Operating Temperature Range: 0°C to 70°C
- Thermal Resistance (NE Package):
- Junction-to-Ambient (RθJA): 36.4°C/W
- Junction-to-Case (RθJC): 22.5°C/W