LTV-817S-TA1-D

Introduction to LTV-817S-TA1-D:
- It’s a single-channel optocoupler (optoisolator) in a 4-pin DIP from Lite-On (LTV-817S family). It transfers a signal from input LED to a phototransistor output while maintaining electrical isolation between the sides.
- The TA1-D suffix indicates Tape-and-Reel packaging for automated assembly.
- Typical uses: isolated control interfaces, driver/relay isolation, microcontroller signaling, and other applications needing galvanic isolation.
- Pinout (DIP-4): 1 = Anode (LED), 2 = Cathode (LED), 3 = Emitter (phototransistor), 4 = Collector (phototransistor).
- Operation: input LED current controls the phototransistor output; the isolation guarantees separation between the low-voltage control side and the high-voltage/high-current side.
- For exact specs (forward current, CTR range, isolation voltage, response time), consult the LTV-817S-TA1-D datasheet.

LTV-817S-TA1-D is a standard phototransistor optocoupler. Common equivalents:
- PC817 (Sharp)
- EL817 / PS2501 (Everlight)
- 4N25 (Vishay/ON Semiconductor)
- HCPL-817 / HCPL-817A (Broadcom/Avago)
Check electrical specs (CTR, isolation voltage, package/pinout) to confirm drop-in compatibility for your application.

LTV-817S-TA1-D is a 1-channel optocoupler (LED input, phototransistor output) from Lite-On. Key features:
- 1-channel isolation device with input/output optically isolated
- Isolation voltage: up to 5 kV RMS (basic isolation)
- Output: NPN phototransistor with open-collector configuration
- Wide CTR (data transfer ratio) range that depends on LED current, suitable for low- to medium-speed switching
- Packaging: Tape & Reel TA1-D variant; Pb-free/RoHS compliant
- Temperature range: industrial -40°C to +85°C
- LED input rated for standard forward current (typical drive in the datasheet; supports common logic/interfacing levels)
- Applications: isolated feedback in power supplies, microcontroller/logic isolation, signal switching, and other high-voltage isolation needs
Note: For exact CTR, IF, VCE(sat), and forward-voltage specs, consult the LTV-817S datasheet for the TA1-D variant.

- Pin count: 4 pins (single-channel optocoupler).
- Pin functions (standard LTV-817 pinout):
1. Anode (LED +)
2. Cathode (LED −)
3. Emitter (phototransistor, typically to ground)
4. Collector (phototransistor, open-collector output/pull-up to VCC)
(LED on pins 1–2, phototransistor on pins 3–4; collector requires an external pull-up resistor to produce a logic output.)

- Manufacturer: Lite-On (LITE-ON Technology Corporation; Lite-On Semiconductor).
- Company type: A Taiwanese multinational electronics manufacturer specializing in optoelectronics, LEDs, displays, and related components (including optocouplers like the LTV-817S).

LTV-817S-TA1-D is a 1-channel optocoupler. Typical applications:
- General galvanic isolation between microcontroller/logic and high-voltage/noisy circuits.
- Isolated feedback for switch‑mode power supplies and DC‑DC converters.
- Isolated I/O interfaces in industrial automation, PLCs, and instrumentation.
- Signal isolation in telecom and consumer electronics.
- Automotive/industrial sensing and control circuits requiring noise/surge immunity.
Note: Use a driver stage to switch loads; the device provides isolation, not direct power switching.

LTV-817S-TA1-D uses a 4-pin DIP (through-hole) package.