Texas Instruments SN75452BPS

Overview

SN75452BPS from Texas Instruments is a dual-channel NAND peripheral driver IC designed for high-current, high-speed switching in TTL-compatible systems. It delivers 300mA per channel, supports up to 30V output voltage, operates from 0°C to 70°C, and features open-collector outputs with diode-clamped TTL inputs - used in LED drivers, lamp drivers, and line drivers where logic-level isolation and load current amplification are required.

For engineers reviewing the SN75452BPS datasheet, SN75452BPS pinout, SN75452BPS application, or SN75452BPS equivalent, key selection criteria include its NAND logic function, 300mA continuous output capability, 30V off-state voltage rating, SO package thermal performance (RθJA = 119.6°C/W), and compatibility with 5V TTL input thresholds.

Technical Context

The SN75452BPS implements dual independent NAND-gated npn transistor drivers with internally connected gate outputs to transistor bases. Each channel provides open-collector output capable of sinking up to 300mA while maintaining latch-up immunity at 20V after conducting rated current.

Its TTL-compatible inputs feature diode clamping for robust noise immunity and simplified interfacing with microcontrollers or logic families. The device operates strictly within 4.75V–5.25V supply range and requires no external pull-ups on outputs due to inherent open-collector architecture.

Key Specifications

Pinout & Package

SN75452BPS uses an 8-pin SO (Small Outline) package measuring 6.20mm × 5.30mm, with gull-wing leads and surface-mount footprint compatible with JEDEC MS-012AC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN75452BD and SN75452BP, the SN75452BPS delivers superior thermal efficiency in a compact SO outline - making it optimal for thermally constrained, high-density PCBs where 5V TTL-driven peripheral switching is required without layout redesign.

Availability

SN75452BPS is available at Aetrix Electronics and suitable for LED drivers, lamp drivers, line drivers, and memory drivers requiring stable component supply across commercial temperature ranges and long-lifecycle industrial programs.

Supply support for SN75452BPS 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 engineered to replace legacy SN75450-series drivers with enhanced latch-up immunity and consistent 300mA drive capability - targeting cost-sensitive, high-reliability peripheral interfacing in commercial-grade systems.

FAQ

What logic function does the SN75452BPS implement?

The SN75452BPS implements a dual NAND gate driver: each channel outputs a low signal only when both inputs (1A/1B or 2A/2B) are high. This active-low behavior makes it ideal for enabling high-side loads via external pull-up resistors. Its internal schematic connects NAND outputs directly to npn transistor bases, delivering true logic-controlled current sinking up to 300mA per channel - a core capability confirmed in TI's SLRS021E datasheet functional tables and logic diagrams for SN75452BPS.

Can SN75452BPS drive a 24V relay coil directly?

Yes, SN75452BPS can drive a 24V relay coil directly when used with an appropriate external flyback diode and pull-up resistor. Its 30V off-state output voltage rating and 300mA continuous sink current exceed typical 24V relay coil requirements (e.g., 12–25mA holding current). The open-collector output allows the relay to be connected between +24V and SN75452BPS pin 1Y or 2Y, with the driver sinking current when enabled - a configuration validated in TI's Figure 9-1 typical application circuit and supported by latch-up immunity up to 20V.

Does SN75452BPS require external base resistors for transistor drive?

No, SN75452BPS does not require external base resistors. Its internal schematic (TI SLRS021E Figure 8-10) integrates fixed-value base-drive resistors (1kΩ and 1.6kΩ) for each npn output transistor. These resistors ensure proper saturation at 300mA load while maintaining TTL input compatibility - eliminating the need for discrete biasing components and reducing BOM count in lamp, LED, or relay driver designs using SN75452BPS.

What is the maximum ambient temperature for continuous operation of SN75452BPS?

The SN75452BPS is characterized for continuous operation from 0°C to 70°C ambient temperature, as specified in TI's SLRS021E datasheet Section 4 (Device Comparison Table) and Section 6.2 (Recommended Operating Conditions). This commercial-grade temperature range applies specifically to the SN75452BPS variant (not the military-grade SN55452B), and thermal derating must be applied above 25°C using its published RθJA of 119.6°C/W to maintain junction temperature below 150°C.

How does SN75452BPS differ from SN75451B in practical use?

SN75452BPS implements NAND logic (output low only when both inputs are high), whereas SN75451B implements AND logic (output high only when both inputs are high). In practice, this means SN75452BPS is suited for active-low enable applications - such as turning on a 24V lamp when two safety interlocks are closed - while SN75451B suits active-high control. Both share identical pinout, drive strength (300mA), voltage ratings (30V), and package options, making them functionally interchangeable only when logic inversion is accounted for in system firmware or external gating.