Texas Instruments SN75472PE4

Overview

SN75472PE4 from Texas Instruments is a dual peripheral NAND driver IC designed for high-voltage, high-current logic interfacing and load switching. It features TTL-compatible diode-clamped inputs, 70 V off-state output voltage capability, 300 mA continuous output current per channel, and operates across 0°C to 70°C. It is used in relay drivers, lamp drivers, and MOS transistor gate drivers where robust output stage isolation and latch-up immunity are required.

For engineers reviewing the SN75472PE4 datasheet, SN75472PE4 pinout, SN75472PE4 application, or SN75472PE4 equivalent, key selection criteria include its 70 V output breakdown rating, dual-NAND logic function with open-collector–like npn output transistors, 300 mA drive capability per channel, and PDIP-8 package compatibility with legacy through-hole designs.

Technical Context

The SN75472PE4 implements two independent NAND gates whose outputs directly drive internal npn transistors with emitter-connected outputs and collector-connected loads - enabling high-side switching of inductive or resistive loads up to 70 V. Each output is characterized for no latch-up at 55 V after conducting 300 mA.

It uses resistor-transistor logic (RTL) input stages with diode clamping, supports standard 5 V TTL logic levels, and delivers medium-speed switching with typical tPLH/tPHL of 45/30 ns at 200 mA load and 15 pF capacitance. Its supply current varies significantly between output states (ICCH = 13–17 mA vs. ICCL = 61–76 mA), reflecting its saturated npn output architecture.

Key Specifications

Pinout & Package

SN75472PE4 is supplied in an 8-pin plastic DIP (PDIP) package with 0.3-inch body width and through-hole mounting. 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 NAND peripheral driver applications.

Compared with SN75472P, SN75472PE4 offers identical performance with updated environmental compliance; compared with ULN2003A, it trades channel count and current headroom for integrated NAND logic and faster switching - making it optimal for compact, logic-integrated peripheral control.

Availability

SN75472PE4 is available at Aetrix Electronics and suitable for relay driver modules, lamp control systems, MOSFET gate interfaces, and memory peripheral buffers requiring stable component supply and long-lifecycle support.

Supply support for SN75472PE4 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 company founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.

The SN75472PE4 belongs to TI's legacy peripheral driver family, designed specifically for robust, high-voltage logic interfacing in industrial control, instrumentation, and electromechanical systems - emphasizing latch-up immunity and TTL compatibility over speed or integration.

FAQ

What is the logic function implemented by the SN75472PE4?

The SN75472PE4 implements two independent 2-input NAND gates. In positive logic, each gate outputs a LOW (active) state only when both inputs are HIGH; otherwise, the output is HIGH (inactive). Internally, the NAND output drives an npn transistor with emitter grounded and collector available at the output pin - resulting in an open-emitter configuration that sinks current when active. This matches the SN75472 functional specification confirmed in the SLRS024 datasheet.

Can the SN75472PE4 drive a 24 V relay coil directly?

Yes, the SN75472PE4 can drive a 24 V relay coil directly using its open-emitter output configuration. Connect the relay coil between the 24 V supply and the SN75472PE4 output pin (e.g., 1Y or 2Y); the IC sinks current when the NAND output is active. Its 70 V off-state output voltage rating and no-latch-up guarantee at 55 V ensure safe operation during coil flyback. Confirm coil current stays ≤300 mA - typical 24 V relays draw 15–50 mA, well within SN75472PE4 capability.

What is the maximum continuous output current per channel of the SN75472PE4?

The SN75472PE4 is characterized for 300 mA continuous collector current per channel at TA = 25°C, with derating above 25°C. At 70°C ambient, the PDIP package supports 640 mW total power dissipation, limiting practical continuous current to ~250 mA per channel depending on layout and heatsinking. This rating is explicitly stated in the Absolute Maximum Ratings table and validated in the Dissipation Rating Table for the P package in the SLRS024 datasheet.

Is the SN75472PE4 pin-compatible with the SN75471PE4 or SN75473PE4?

Yes, the SN75472PE4 is pin-compatible with SN75471PE4 (dual AND) and SN75473PE4 (dual OR) - all share identical PDIP-8 pinout, supply connections, and output structure. The only difference is internal logic function: SN75472PE4 implements NAND, while SN75471PE4 implements AND and SN75473PE4 implements OR. This interchangeability is confirmed in the "DEVICE PACKAGES" and logic symbol sections of the SLRS024 datasheet.

Does the SN75472PE4 require external pull-up resistors on its outputs?

Yes, the SN75472PE4 outputs are open-emitter npn transistors - they can only sink current and require external pull-up resistors (or direct connection to a load tied to a positive supply) to define the HIGH state voltage. The value depends on load current and desired rise time; for a 300 mA load at 24 V, a 68 Ω resistor yields ~23.5 V HIGH level. This behavior is inherent to the schematic shown in the SN75472 section of the SLRS024 datasheet and applies identically to SN75472PE4.