Texas Instruments SN75472D

Overview

SN75472D from Texas Instruments is a dual peripheral NAND driver IC designed for high-voltage, high-current logic interfacing in industrial control and electromechanical systems. It delivers 300 mA continuous output current per channel, supports 70 V off-state output voltage, operates over 0°C to 70°C, and features TTL-compatible diode-clamped inputs - enabling direct interface with microcontrollers driving relays, lamps, or MOSFET gates.

For engineers reviewing the SN75472D datasheet, SN75472D pinout, SN75472D application, or SN75472D equivalent, this page provides verified functional identity, validated SOIC-8 pin mapping, confirmed switching performance (tPHL ≤ 50 ns), thermal derating data, and two functionally comparable alternatives with documented differences in logic function and supply current.

Technical Context

The SN75472D implements two independent NAND gate drivers with open-collector npn output transistors internally connected to gate outputs. Each channel uses resistor-transistor logic (RTL) with base-drive resistors (1 kΩ, 1.6 kΩ, 4 kΩ) and emitter-follower configuration to achieve latch-up immunity up to 55 V after conducting 300 mA.

It operates from 4.75 V to 5.25 V supply, accepts TTL-level inputs (VIL = 0.8 V, VIH = 2 V), and exhibits asymmetric switching: tPLH (45–65 ns) exceeds tPHL (30–50 ns) due to internal pull-down dominance. Output clamping and inter-emitter voltage limits (5.5 V) ensure robustness against inductive kickback in relay and lamp loads.

Key Specifications

Pinout & Package

SN75472D is housed in an 8-pin Small Outline Integrated Circuit (SOIC) package with gull-wing leads, JEDEC MS-012 variation AA compliant, 1.27 mm pitch, and 3.91 mm body width. The package supports reflow per Level-1-260°C-UNLIM MSL rating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN75472D, SN75472P offers superior thermal performance in through-hole form, while SN75473D provides identical packaging and drive strength but fundamentally different logic behavior - making it applicable only where OR-based control is architecturally required.

Availability

SN75472D is available at Aetrix Electronics and suitable for industrial relay control, DC lamp driving, MOSFET gate interfacing, and memory address buffering requiring stable component supply and long-term obsolescence management.

Supply support for SN75472D 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 SN75472D belongs to TI's legacy peripheral driver family, engineered for robust high-voltage interfacing between logic controllers and electromechanical loads in factory automation and instrumentation systems.

FAQ

What logic function does the SN75472D implement?

The SN75472D implements two independent 2-input NAND gates with open-collector npn outputs. In positive logic, each output Y is low only when both inputs A and B are high (Y = A·B). This enables active-low control of relays, lamps, or MOSFET gates, and is confirmed by the SN75472 FUNCTION TABLE on page 4 of the SLRS024 datasheet.

Can the SN75472D replace the SN75471D or SN75473D in a circuit?

No - the SN75472D cannot directly replace SN75471D (dual AND) or SN75473D (dual OR) because their truth tables differ fundamentally. While all three share identical pinout, supply, and drive capability, substituting them changes logic behavior: SN75472D asserts low only on A·B = 1, whereas SN75471D asserts high on A·B = 1. Always verify logic polarity before substitution.

What is the maximum continuous output current per channel of the SN75472D?

The SN75472D is characterized for 300 mA continuous collector current per channel under recommended operating conditions (VCC = 4.75–5.25 V, TA = 0°C to 70°C). This value is specified in the "Characterized for Use to 300 mA" headline and confirmed in the Absolute Maximum Ratings table (continuous collector current = 400 mA, with 300 mA as rated operational limit).

Does the SN75472D require external pull-up resistors on its outputs?

Yes - the SN75472D features open-collector npn outputs (pins 1Y and 2Y), which can only sink current. An external pull-up resistor to VCC or a higher voltage rail is mandatory to establish a valid high logic level. Typical values range from 1 kΩ to 10 kΩ depending on speed and load requirements, as shown in the schematic on page 4 of the datasheet.

Is the SN75472D RoHS compliant and what is its moisture sensitivity level?

Yes - the SN75472D is RoHS compliant (lead finish: NIPDAU) and rated MSL Level-1 with unlimited floor life at ≤ 30°C/60% RH. Its peak reflow temperature is 260°C, per the TI Package Option Addendum. This information is verified in the "PACKAGE OPTION ADDENDUM" section dated 11-Nov-2025 on ti.com.