Texas Instruments SN55452BJG

Overview

SN55452BJG from Texas Instruments is a military-grade dual-NAND peripheral driver IC with open-collector npn transistor outputs, designed for high-current (300mA), high-voltage (30V) switching in TTL-compatible systems. It operates across –55°C to 125°C, features diode-clamped TTL inputs, and replaces SN75450-family logic drivers in ruggedized industrial and aerospace control interfaces.

For engineers reviewing the SN55452BJG datasheet, SN55452BJG pinout, SN55452BJG application, or SN55452BJG equivalent, this page delivers verified electrical specs, military-temperature operation limits, CDIP-8 package details, NAND logic function mapping, and validated alternatives for high-reliability peripheral driving where latch-up immunity and 30V off-state output voltage are critical.

Technical Context

The SN55452BJG implements dual independent NAND gates whose outputs directly drive internal npn transistors with base resistors integrated per channel. Each output supports up to 300mA continuous collector current and withstands 30V off-state voltage, enabling direct interfacing with lamps, relays, and LEDs without external buffering.

Its diode-clamped TTL inputs ensure compatibility with standard 5V logic families while eliminating need for external pull-ups or clamping networks. The device is characterized for full military temperature range (–55°C to 125°C) and specified for latch-up immunity at 20V after conducting 300mA - a key reliability feature absent in commercial SN7545xB variants.

Key Specifications

Pinout & Package

SN55452BJG uses an 8-pin Ceramic Dual In-line Package (CDIP) with 9.60 mm × 6.67 mm body size and through-hole mounting. Lead finish is SnPb (non-RoHS), rated for 100°C lead temperature during 10-second soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN55452BFK and SN75452BD, SN55452BJG uniquely combines military temperature range, through-hole CDIP packaging, and SnPb leads - making it the sole option for legacy-replacement, high-reliability, through-hole designs requiring full MIL-PRF-38535 compliance.

Availability

SN55452BJG is available at Aetrix Electronics and suitable for industrial relay control, aerospace actuator interface, high-voltage LED panel driving, and legacy system logic buffer upgrades requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SN55452BJG 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 SN5545xB family was developed to provide military-qualified, latch-up-immune peripheral drivers that replace legacy SN75450-series logic buffers while maintaining pin and functional compatibility - targeting high-integrity control systems where failure is not an option.

FAQ

What logic function does SN55452BJG implement?

SN55452BJG implements two independent 2-input NAND gates, each driving an open-collector npn transistor output. When both inputs are HIGH, the corresponding output pulls LOW (sinks current); otherwise, the output remains high-impedance. This matches positive-logic NAND behavior: Y = NOT(A AND B). The internal schematic includes base resistors and diode-clamped inputs for direct TTL interfacing without external components.

Is SN55452BJG pin-compatible with SN75452B?

Yes, SN55452BJG is pin-compatible with SN75452B in the 8-pin CDIP (JG) and SOIC (D) packages respectively - both share identical pin numbering (1A, 1B, 1Y, GND, VCC, 2B, 2A, 2Y) and logic function. However, SN55452BJG operates from –55°C to 125°C and uses SnPb leads, whereas SN75452B is commercial-grade (0°C to 70°C) and RoHS-compliant. Physical insertion into the same socket is possible only if the PCB footprint matches CDIP-8.

What is the maximum load voltage SN55452BJG can switch?

SN55452BJG supports an off-state output voltage of up to 30 V, meaning it can safely interface with loads referenced to supply rails as high as 30 V when the output is in the high-impedance (OFF) state. This allows direct driving of 24 V industrial lamps, relays, and solenoids without external voltage translators. Continuous output current must remain ≤300 mA per channel, and absolute maximum ratings prohibit exceeding 30 V at any time.

Does SN55452BJG require external pull-up resistors on its outputs?

Yes, SN55452BJG requires external pull-up resistors on both 1Y and 2Y outputs because they are open-collector. The resistor value depends on load voltage and desired rise time; for a 24 V lamp load switching 200 mA, a 120 Ω resistor provides ~200 mA sink current and <1 µs rise time with 15 pF capacitance. Pull-ups connect between V_LOAD (e.g., 24 V) and the respective Y pin - not to SN55452BJG's VCC (5 V).

How does SN55452BJG achieve latch-up immunity?

SN55452BJG achieves latch-up immunity through proprietary process design and layout techniques that prevent parasitic SCR activation under high-current, high-voltage stress. The datasheet confirms no latch-up occurs at 20 V after conducting 300 mA - a condition that would trigger destructive latch-up in standard bipolar logic drivers. This immunity is validated across the full –55°C to 125°C range and is a defining feature distinguishing SN55452BJG from commercial SN7545xB variants.