Texas Instruments SN65472DREP

Overview

SN65472DREP from Texas Instruments is a dual peripheral NAND driver IC designed for high-voltage switching in industrial control systems. It delivers 300 mA continuous output current per channel, supports 70 V off-state output voltage, operates from –40°C to 125°C, and features TTL-compatible diode-clamped inputs - enabling direct interface with legacy logic in relay, lamp, and MOSFET driver applications.

For engineers reviewing the SN65472DREP datasheet, SN65472DREP pinout, SN65472DREP application, or SN65472DREP equivalent, key selection criteria include breakdown voltage margin (70 V), latch-up immunity at 55 V, medium-speed switching (tPLH = 65 ns max), and SOIC-8 packaging for space-constrained PCB layouts in extended-temperature industrial environments.

Technical Context

The SN65472DREP implements two independent open-collector NPN transistor drivers with internally connected NAND logic gates - each input pair (A/B) controls one output (Y) in positive logic (Y = A·B). Inputs are diode-clamped for TTL compatibility and robustness against overvoltage transients.

Each output stage is rated for 400 mA continuous collector current and withstands 70 V off-state voltage without latch-up, making it suitable for driving inductive loads like relays and solenoids where flyback energy must be safely clamped. Thermal design is supported by θJA = 115.3°C/W and junction temperature operation up to 125°C.

Key Specifications

Pinout & Package

SN65472DREP is housed in an 8-pin SOIC (D) package with 1.75 mm maximum height, JEDEC MS-012 compliant, and RoHS-compliant NiPdAu lead finish. Pin 1 is located in quadrant Q1 of the tape-and-reel orientation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual peripheral driver applications.

Compared with SN75452B and ULN2003A, the SN65472DREP uniquely balances 70 V off-state capability, 125°C operation, and medium-speed response - making it optimal for mission-critical industrial interfaces where voltage margin and thermal resilience outweigh raw speed or channel density.

Availability

SN65472DREP is available at Aetrix Electronics and suitable for industrial control systems, aerospace data acquisition modules, and railway signaling equipment requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for SN65472DREP 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 specializing in analog, embedded processing, and high-reliability components for industrial, automotive, and aerospace markets.

The SN65472DREP belongs to TI's Space Enhanced Plastic (SEP) product line - engineered for radiation-tolerant, extended-lifetime operation in harsh environments including satellite subsystems and defense electronics.

FAQ

What is the maximum continuous output current per channel for SN65472DREP?

The SN65472DREP is characterized for 300 mA continuous collector current per channel under recommended operating conditions (TA = –40°C to 125°C, VCC = 4.75 V to 5.25 V). Absolute maximum rating is 400 mA, but sustained operation above 300 mA requires thermal derating based on PCB copper area and ambient conditions. The SN65472DREP datasheet specifies this limit with thermal metrics (θJA = 115.3°C/W) to guide heatsinking decisions.

Does SN65472DREP support 3.3 V logic inputs?

No, SN65472DREP does not reliably support 3.3 V logic inputs. Its TTL-compatible inputs require VIH ≥ 2.1 V and VIL ≤ 0.8 V at VCC = 5 V, meaning a 3.3 V system's high-level output may fall below the guaranteed recognition threshold. Interfacing with 3.3 V controllers requires a level-shifter or buffer; the SN65472DREP itself is designed exclusively for 5 V logic families. This behavior is explicitly defined in the RECOMMENDED OPERATING CONDITIONS table of the SN65472DREP datasheet.

Can SN65472DREP replace SN75452B in existing designs?

SN65472DREP is functionally interchangeable with SN75452B per TI's datasheet description, sharing identical pinout, logic function (dual NAND driver), and SOIC-8 package. However, SN65472DREP offers higher 70 V off-state voltage versus SN75452B's 40 V rating and operates up to 125°C versus 70°C - making it a drop-in upgrade for voltage- or temperature-critical applications. Always verify layout thermal margins, as SN65472DREP's slightly slower switching may affect timing-critical paths.

What is the purpose of the diode-clamped inputs on SN65472DREP?

The diode-clamped inputs on SN65472DREP protect against input overvoltage transients and ensure TTL-level compatibility by limiting input voltage to approximately VCC + 0.7 V and GND – 1.5 V (VIK = –1.5 V min). This clamping prevents damage from ESD or noise spikes and guarantees correct logic interpretation across the full –40°C to 125°C range. The SN65472DREP's input clamp voltage is specified at –1.2 V (min) under test, confirming robust negative transient tolerance essential in electrically noisy industrial settings.

Is SN65472DREP suitable for driving inductive loads without external flyback diodes?

No, SN65472DREP does not integrate flyback diodes and requires external suppression for inductive loads such as relays or solenoids. While its 70 V off-state rating and no-latch-up-at-55-V feature provide margin against flyback spikes, sustained voltage beyond 70 V will damage the output transistor. A standard 1N400x or faster Schottky diode must be connected cathode-to-VCC, anode-to-output (1Y or 2Y) for each driven inductor. This external protection is mandatory - the SN65472DREP datasheet explicitly states "external diodes are required" in the Applications section.