Texas Instruments SN75452BPSR

Overview

SN75452BPSR from Texas Instruments is a dual-channel NAND peripheral driver IC designed for high-current, high-speed switching in TTL-compatible 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 logic-level peripherals in industrial control and instrumentation interfaces.

For engineers reviewing the SN75452BPSR datasheet, SN75452BPSR pinout, SN75452BPSR application, or SN75452BPSR equivalent, key selection criteria include its commercial-grade temperature range (0°C to 70°C), SO package (PS) with 8-pin surface-mount footprint, NAND logic function per channel, and absence of internal latching under 20 V/300 mA stress conditions.

Technical Context

The SN75452BPSR implements two independent TTL-compatible NAND gate drivers, each with diode-clamped inputs and npn open-collector output transistors. Its internal logic drives base-emitter junctions directly, eliminating external base resistors while ensuring latch-up immunity up to 20 V after conducting full-rated 300 mA load current.

It operates from a single 4.75–5.25 V supply, supports standard TTL input thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V), and features low-level output voltage of 0.5 V (max) at 300 mA - confirming suitability for driving grounded loads with minimal saturation loss.

Key Specifications

Pinout & Package

SN75452BPSR uses an 8-pin SO (Small Outline) package (PS), measuring 6.20 mm × 5.30 mm, with gull-wing leads and RoHS-compliant NiPdAu finish. Thermal resistance R_θJA is 119.6°C/W, supporting moderate power dissipation in compact layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN75452BD and SN75452BP, SN75452BPSR offers the largest body size (6.20 mm × 5.30 mm) among SO variants, improving mechanical stability and thermal mass for high-reliability industrial PCBs - while maintaining identical logic behavior, timing, and drive strength.

Availability

SN75452BPSR is available at Aetrix Electronics and suitable for industrial control, test instrumentation, and embedded peripheral interfacing requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for SN75452BPSR 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, automotive, and communications markets.

The SN7545xB family was engineered to replace legacy SN75450-series drivers with enhanced latch-up immunity and consistent high-speed performance - targeting TTL-based peripheral interfacing in cost-sensitive, reliability-critical systems.

FAQ

What logic function does the SN75452BPSR implement per channel?

The SN75452BPSR implements a dual NAND gate driver: each channel outputs a logic LOW (sinks current) only when both inputs (A and B) are HIGH. This active-low behavior makes it ideal for enabling relays, LEDs, or other grounded loads. The internal schematic connects NAND gate outputs directly to npn transistor bases, eliminating external bias components.

Can SN75452BPSR drive a 24 V lamp directly?

Yes, SN75452BPSR can drive a 24 V lamp directly via its open-collector outputs, which tolerate up to 30 V off-state voltage. With 300 mA continuous current rating per channel and 0.5 V max V_OL at that load, it delivers efficient sinking capability - provided the lamp's cold resistance stays within safe power limits (e.g., ≤7.2 W at 24 V). External flyback protection is recommended for inductive lamps.

Does SN75452BPSR require external base resistors?

No, SN75452BPSR does not require external base resistors. Its internal design integrates optimized base-emitter resistors (e.g., 1.6 kΩ and 4 kΩ networks shown in Figure 8-10) to properly bias the npn output transistors across temperature and supply variations - simplifying layout and ensuring reliable turn-on/turn-off without user-calculated resistor values.

What is the maximum operating temperature for SN75452BPSR?

The SN75452BPSR is characterized for operation from 0°C to 70°C ambient temperature - the commercial-grade range defined in its Recommended Operating Conditions. This specification is validated per TI's SLRS021E datasheet and applies to all SO (PS) packaged variants including SN75452BPSR. Operation outside this range may result in parametric deviation or functional failure.

How does SN75452BPSR prevent latch-up during overcurrent events?

SN75452BPSR prevents latch-up by design: its internal structure avoids parasitic SCR formation, and it is tested to withstand 20 V applied to outputs while conducting 300 mA continuously - with no latch-up observed. This robustness is confirmed in Section 6.1 Absolute Maximum Ratings and Figure 7-3 latch-up test circuit, making it suitable for noisy industrial environments where load faults may occur.