Texas Instruments SN75453BPG4

Overview

SN75453BPG4 from Texas Instruments is a dual OR-gate peripheral driver IC designed for high-current, high-speed switching in TTL-compatible systems. It delivers 300 mA per channel, supports up to 30 V output voltage, operates from 0°C to 70°C, and features open-collector outputs with diode-clamped TTL inputs - commonly used to drive LEDs, lamps, and high-voltage peripherals from microcontrollers.

For engineers reviewing the SN75453BPG4 datasheet, SN75453BPG4 pinout, SN75453BPG4 application, or SN75453BPG4 equivalent, key selection criteria include its OR logic function, commercial-temperature-rated dual-driver architecture, latch-up immunity at 20 V/300 mA, and compatibility with 5 V logic supply rails.

Technical Context

The SN75453BPG4 implements two independent OR-gate logic functions (positive logic: Y = A + B), each driving an NPN open-collector output transistor. Inputs are diode-clamped for TTL compatibility, and internal base resistors enable direct connection to standard logic without external biasing.

Each channel operates with guaranteed low-level output voltage ≤0.4 V at 300 mA (VCC = 5 V, TA = 25°C), propagation delays of 18–25 ns (low-to-high/high-to-low), and thermal resistance RθJA = 63.7°C/W in SOIC-8 package - enabling reliable high-speed switching in industrial control and power interface applications.

Key Specifications

Pinout & Package

SN75453BPG4 is supplied in an 8-pin SOIC (D) package measuring 4.90 mm × 3.90 mm, with standard JEDEC MS-012AC footprint and RoHS-compliant NiPdAu lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN75453BD, SN75453BPG4 adds Pb-free (G4) marking and full RoHS compliance while retaining identical timing, drive strength, and temperature range; SN75452BD offers NAND logic but cannot replace OR functionality without modifying upstream logic states.

Availability

SN75453BPG4 is available at Aetrix Electronics and suitable for LED drivers, lamp drivers, line drivers, and memory drivers requiring stable component supply across industrial and commercial production programs.

Supply support for SN75453BPG4 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 logic solutions for industrial, automotive, and communications markets.

The SN7545xB family was designed to replace legacy SN75450-series peripheral drivers with improved latch-up immunity and tighter parametric control - targeting TTL-based interface and power-driving applications in cost-sensitive commercial systems.

FAQ

What logic function does the SN75453BPG4 implement?

The SN75453BPG4 implements two independent OR gates (positive logic: Y = A + B) with open-collector outputs. Each channel turns its output transistor ON when at least one input (A or B) is high, pulling the output low to sink current. This behavior is confirmed in the device function table and logic diagrams in the official TI datasheet SLRS021E.

Can SN75453BPG4 drive a 24 V relay coil directly?

Yes, SN75453BPG4 can drive a 24 V relay coil directly via its open-collector output, provided the coil current remains ≤300 mA and a pull-up resistor or external 24 V supply is connected to the output. The device supports up to 30 V off-state voltage and is characterized for latch-up immunity at 20 V/300 mA - making it suitable for such industrial interface roles.

What is the maximum recommended operating frequency for SN75453BPG4?

The SN75453BPG4 has typical propagation delays of 18–25 ns and transition times of 5–12 ns, supporting reliable operation up to approximately 20 MHz toggle rate in well-designed layouts. However, it is not specified as a clock distribution device; its primary use is for asynchronous control signal buffering and peripheral driving, not high-frequency clock generation.

Does SN75453BPG4 require external base resistors on its inputs?

No, SN75453BPG4 does not require external base resistors on its inputs. Its TTL-compatible diode-clamped inputs integrate internal current-limiting and clamping structures, allowing direct connection to standard 5 V logic outputs without additional components - a key design simplification confirmed in the Functional Description and Application Information sections of the datasheet.

How does SN75453BPG4 differ from SN75451B in practical use?

SN75453BPG4 implements OR logic (Y = A + B), whereas SN75451B implements AND logic (Y = A · B). Both share identical package, drive capability (300 mA), voltage ratings (30 V), and temperature range (0°C to 70°C). The functional difference dictates system-level logic design: SN75453BPG4 activates its output when either input is high; SN75451B requires both inputs high - making them non-interchangeable without logic inversion.