Texas Instruments SN75452BDR

Overview

SN75452BDR from Texas Instruments is a dual-channel NAND peripheral driver IC designed for high-current, high-speed switching in TTL-compatible logic systems. It delivers open-collector outputs with 300 mA continuous current capability per channel, 30 V output voltage tolerance, and propagation delays as low as 26 ns (typical) at 5 V supply - enabling direct drive of lamps, LEDs, relays, and line loads in industrial control and embedded interface applications.

For engineers reviewing the SN75452BDR datasheet, SN75452BDR pinout, SN75452BDR application, or SN75452BDR equivalent, this page provides verified functional identity, SOIC-8 package mapping, confirmed NAND logic behavior, latch-up immunity up to 20 V, and real-world design context for interfacing microcontrollers with high-voltage/high-current peripherals.

Technical Context

The SN75452BDR implements two independent NAND-gated NPN transistor drivers with diode-clamped TTL-compatible inputs and open-collector outputs. Each channel integrates internal base resistors (1 kΩ, 4 kΩ, 1.6 kΩ) and emitter termination (130 Ω), eliminating external bias components while ensuring defined logic thresholds (VIH = 2 V, VIL = 0.8 V) and robust noise immunity.

It operates across 0°C to 70°C ambient temperature with 4.75–5.25 V supply, supports simultaneous full-load switching on both channels within thermal limits (RθJA = 122.2°C/W for SOIC-8), and guarantees no latch-up when conducting 300 mA at 20 V - a key reliability feature distinguishing it from standard logic buffers.

Key Specifications

Pinout & Package

SN75452BDR is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.90 mm, with standard gull-wing lead form and RoHS-compliant NiPdAu plating. Thermal performance is characterized per JEDEC JESD51 standards, supporting reflow per Level-1-260°C profile.

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, SN75452BDR offers identical functionality and performance in tape-and-reel SOIC-8 format optimized for high-volume SMT manufacturing, with tighter logistics control and verified reflow compatibility (Level-1-260°C).

Availability

SN75452BDR is available at Aetrix Electronics and suitable for industrial automation, LED lighting control, legacy system repair, and embedded interface design requiring stable component supply and long-term manufacturability.

Supply support for SN75452BDR 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 connectivity technologies with over 90 years of innovation in industrial and automotive electronics.

The SN7545xB family was engineered to replace legacy SN75450-series drivers with enhanced latch-up immunity and consistent high-current switching - targeting TTL-based industrial control, instrumentation, and retro-computing applications.

FAQ

What logic function does the SN75452BDR implement?

The SN75452BDR implements two independent NAND gates, each driving an NPN open-collector output transistor. When both inputs (e.g., 1A and 1B) are HIGH, the corresponding output (1Y) is pulled LOW (saturated). This active-low behavior enables direct control of loads referenced to positive supply rails. The SN75452BDR's NAND logic is fixed and not configurable - it differs from AND/NOR/OR variants in the same SN7545xB family.

Can SN75452BDR drive a 24 V relay coil directly?

Yes, SN75452BDR can drive a 24 V relay coil directly using its open-collector output. Connect the relay coil between +24 V and the SN75452BDR output pin (e.g., 1Y), and ensure the coil current remains ≤300 mA. The SN75452BDR's 30 V off-state rating and latch-up immunity at 20 V make it suitable for inductive loads. Always include a flyback diode across the coil - the SN75452BDR itself does not integrate suppression.

What is the maximum supply voltage for SN75452BDR's VCC pin?

The SN75452BDR's VCC pin must be supplied with 4.75 V to 5.25 V - strictly limited to TTL-compatible 5 V operation. This supply powers only the internal logic and bias networks; it is not connected to the output stage. Applying voltage outside this range risks incorrect logic behavior or permanent damage. Load voltage (e.g., 24 V) is applied externally to the open-collector outputs and is independent of VCC.

Does SN75452BDR require external base resistors?

No, SN75452BDR does not require external base resistors. It integrates all necessary biasing: a 1 kΩ resistor from input to base, a 4 kΩ resistor from base to emitter, and a 1.6 kΩ resistor from emitter to ground - plus a 130 Ω emitter termination resistor. These on-die components establish optimal drive strength and saturation characteristics for 300 mA loads, eliminating external component count and layout uncertainty.

How does SN75452BDR differ from SN75451B?

SN75452BDR implements NAND logic (output LOW only when both inputs are HIGH), whereas SN75451B implements AND logic (output HIGH only when both inputs are HIGH - though its open-collector output requires external pull-up to realize that HIGH state). Their internal schematics differ in resistor values and transistor connections to achieve distinct truth tables. Both share identical package options, current rating (300 mA), voltage ratings (30 V), and thermal specs - making them functionally non-interchangeable without logic inversion in the system design.