Texas Instruments SN75463P

Overview

SN75463P from Texas Instruments is a dual high-voltage, high-current OR gate peripheral driver IC designed for logic-level-to-power-level interfacing in industrial control and relay-driving applications. It delivers 300 mA continuous output current per channel, supports up to 35 V off-state output voltage, operates from 4.75–5.25 V supply, and features TTL-compatible diode-clamped inputs with no latch-up at 30 V after conducting rated current.

For engineers reviewing the SN75463P datasheet, SN75463P pinout, SN75463P application, or SN75463P equivalent, this device serves as a robust discrete-output logic buffer for driving lamps, relays, MOSFET gates, and memory address lines where breakdown voltage margin and ruggedness outweigh ultra-high-speed requirements.

Technical Context

The SN75463P implements two independent OR gates (positive logic: Y = A + B) whose outputs drive NPN bipolar transistors with internal base resistors (1.6 kΩ, 4 kΩ, 130 Ω network). Each output stage is rated for 300 mA continuous collector current and withstands 35 V off-state voltage without latch-up.

It uses TTL-compatible input circuitry with diode clamping, operates over 0°C to 70°C, and is characterized for medium-speed switching (tPHL ≤ 40 ns, tPLH ≤ 55 ns at 200 mA load), making it suitable for non-critical timing applications requiring high-voltage isolation between logic and power domains.

Key Specifications

Pinout & Package

SN75463P is housed in an 8-pin plastic dual in-line package (PDIP) with 0.3-inch body width and 0.1-inch lead pitch. The package uses a copper lead frame for improved thermal performance and reliability.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual high-voltage OR driver applications.

Compared with SN75462P and ULN2003A, the SN75463P uniquely delivers true OR logic in a compact dual-channel format with optimized 40 ns switching and 35 V breakdown-making it the only choice when both native OR functionality and high-voltage ruggedness are simultaneously required.

Availability

SN75463P is available at Aetrix Electronics and suitable for industrial relay control, DC lamp driving, MOSFET gate buffering, and memory address line strengthening requiring stable component supply across long-lifecycle embedded programs.

Supply support for SN75463P includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.

The SN75463P belongs to TI's legacy peripheral driver family designed specifically for bridging 5 V logic domains to 24 V industrial power loads-prioritizing ruggedness, latch-up immunity, and simplified board-level integration over speed.

FAQ

What logic function does the SN75463P implement?

The SN75463P implements two independent OR gates (Y = A + B) in positive logic configuration. When either input A or B is high, the corresponding open-collector NPN output pulls low. This differs from AND or NAND variants in the same SN7546x series and enables direct implementation of "any-of" control logic without external inversion.

Can the SN75463P drive a 24 V relay coil directly?

Yes, the SN75463P can drive a typical 24 V DC relay coil directly. Its 35 V off-state output voltage rating and 300 mA continuous sink current per channel exceed standard 24 V relay requirements (typically 20–100 mA). The internal base resistor network eliminates need for external components, and its latch-up immunity protects against inductive kickback.

What is the maximum operating temperature range for the SN75463P?

The SN75463P is characterized for operation from 0°C to 70°C ambient temperature. This commercial-grade specification aligns with its PDIP (P) package variant and distinguishes it from the military-grade SN55463, which operates from −55°C to 125°C. Thermal derating begins above 25°C per the 8.0 mW/°C dissipation factor.

Does the SN75463P require external pull-up resistors on its outputs?

Yes, the SN75463P outputs are open-collector NPN transistors and require external pull-up resistors to define the high state voltage. Typical values range from 1 kΩ to 10 kΩ depending on load capacitance and required rise time. Pull-ups connect between V_CC (or higher voltage rail up to 35 V) and each Y output pin.

How does the SN75463P compare to the ULN2003A in terms of switching speed?

The SN75463P offers significantly faster switching than the ULN2003A: t_PHL ≤ 40 ns and t_PLH ≤ 55 ns versus ~250 ns for the ULN2003A. This makes the SN75463P suitable for applications requiring sub-100 ns timing margins, such as memory address buffering or high-frequency PWM gate driving, where the Darlington-based ULN2003A introduces unacceptable propagation delay.