Specs side by side
2 parts compared · 14 differing specs across 14 total parameters.
| Parameter | ||
|---|---|---|
| Supply voltage | - | Same rails; the missing protection shows up as inductive kick reaching the die. |
| Memory & Peripherals | - | The letter is functional: L293D into a plain L293 socket is protection gained for free; the reverse direction removes the clamps the board was designed to rely on. |
| Case | DIP-16 / SOIC-16 | DIP-16 |
| Compatibility Level | - | Pin-to-Pin (Minor Clock/Init Tuning) |
| Component Category | Motor Drivers (Dual H-Bridge) | - |
| Core & Architecture | - | The same bridge architecture without the D: identical drive pins and currents, no internal flyback diodes - protection that the L293D hides inside the package. |
| Firmware Notes | - | One rule covers the family history: moving down from the D means adding external diodes across every output before the first motor is connected - not after the first failure. |
| Hardware Notes | - | Same DIP-16 footprint across the letter variants. |
| Lead Time Advantage | - | Shenzhen Spot Stock (24-48h Dispatch) |
| Market Reality | The L293D is the motor and stepper driver of a million robotics courses and small CNC builds: four half-bridges (two full bridges), 600mA per channel with 1.2A peaks, and - the reason for the D - internal flyback diodes that the plain L293 leaves to the board. Its drop-in upgrade is the TI SN754410 at one amp pin for pin, and its famous neighbor is the L298N module: twice the current in a MultiWatt body, no internal diodes, and a logic supply that tolerates only 4.5-7V where the L293D accepts up to 36V. The substitution arithmetic between the two looks like a current question and is actually a supply-design question - the classic 12V-into-the-logic-pin death. | - |
| Reference Part | - | L293D |
| Role In Circuit | Original Reference Part | - |
| Sourcing Advantage | - | Stocked; quote the letter the board expects. |
| Sourcing Status | Active Shenzhen Spot Sourcing (24–48h) | - |
Parts
- L293D · stmicroelectronics
- L293 / L293B · stmicroelectronics