Texas Instruments SN75452BPE4

Overview

SN75452BPE4 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 maximum output voltage, and propagation delays as low as 26 ns at 5 V - enabling direct drive of lamps, LEDs, relays, and line loads in industrial control and instrumentation interfaces.

For engineers reviewing the SN75452BPE4 datasheet, SN75452BPE4 pinout, SN75452BPE4 application, or SN75452BPE4 equivalent, this page provides verified functional specifications, validated pin-level circuit roles, confirmed commercial-temperature (0°C to 70°C) operation, and real-world design context for interfacing microcontrollers with high-voltage/high-current peripherals without level-shifting or external buffering.

Technical Context

The SN75452BPE4 implements dual independent NAND-gated npn transistor drivers with diode-clamped TTL-compatible inputs. Each channel's output stage is internally connected to the base of an npn transistor, enabling active-low logic-controlled sinking of up to 300 mA at up to 30 V. The device operates strictly as a logic-driven current sink - not a push-pull or voltage-source driver - and requires external pull-up or load connection to VSUP.

No internal latching occurs under transient overcurrent conditions: latch-up immunity is guaranteed up to 20 V after conducting 300 mA. Its architecture avoids internal feedback paths, eliminating oscillation risk in capacitive-load applications, and supports simultaneous conduction on both channels within thermal dissipation limits (640 mW at TA = 70°C in PDIP package).

Key Specifications

Pinout & Package

SN75452BPE4 uses an 8-pin PDIP (Plastic Dual In-line Package) with 9.81 mm × 6.35 mm body size and through-hole mounting. Pin 1 is top-left corner (notch side), with standard DIP orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN75452BD and ULN2003A, the SN75452BPE4 uniquely integrates dual NAND logic with high-current sinking in a through-hole package - offering pin-compatible logic control, tighter timing control than Darlington arrays, and easier prototyping than SOIC variants.

Availability

SN75452BPE4 is available at Aetrix Electronics and suitable for industrial control, test equipment, legacy system upgrades, and educational lab platforms requiring stable component supply with long-term traceability and RoHS-compliant sourcing.

Supply support for SN75452BPE4 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 U.S.-based semiconductor company specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.

The SN7545xB family was engineered for TTL-system peripheral interfacing - delivering robust, latch-up-free current sinking with integrated logic to replace discrete transistor + gate combinations in cost-sensitive, reliability-critical control applications.

FAQ

What logic function does the SN75452BPE4 implement?

The SN75452BPE4 implements two independent NAND gates, each driving an open-collector npn transistor output. When both inputs (e.g., 1A and 1B) are HIGH, the corresponding output (1Y) sinks current to ground. If either input is LOW, the output remains high-impedance. This behavior is confirmed in Table 8-2 of the official datasheet and applies identically to both channels of the SN75452BPE4.

Can the SN75452BPE4 drive a 12 V relay coil directly?

Yes, the SN75452BPE4 can drive a 12 V relay coil directly, provided the coil's holding current is ≤300 mA and a flyback diode is placed across the coil. The SN75452BPE4's 30 V maximum off-state output voltage and latch-up immunity up to 20 V make it suitable for 12 V inductive loads. Its open-collector output connects the coil's low-side to ground while the high-side ties to +12 V - a configuration explicitly validated in TI's Figure 9-1 application schematic for the SN75452BPE4.

Does the SN75452BPE4 require external pull-up resistors on its outputs?

Yes, the SN75452BPE4 requires external pull-up resistors (or direct connection to a load referenced to VSUP) on both 1Y and 2Y outputs because they are open-collector. Without a pull-up, the output floats HIGH and cannot actively drive a load. Typical values range from 1 kΩ to 10 kΩ depending on VSUP voltage and required rise time - a design requirement explicitly stated in Section 9.2.1 of the SN75452BPE4 datasheet.

Is the SN75452BPE4 compatible with 3.3 V microcontrollers?

Yes, the SN75452BPE4 accepts 3.3 V logic inputs reliably: its VIH threshold is 2.0 V minimum and VIL is 0.8 V maximum, both comfortably met by 3.3 V CMOS/TTL outputs. However, VCC must still be 5 V - the SN75452BPE4 does not operate from 3.3 V supply. This dual-voltage operation (3.3 V logic in, 5 V supply, 24 V load out) is a core design feature confirmed across Sections 6.2 and 8.3 of the SN75452BPE4 datasheet.

What is the thermal limitation of the SN75452BPE4 in PDIP package at 70°C ambient?

In the PDIP-8 package (used by SN75452BPE4), the maximum allowed power dissipation is 640 mW at TA = 70°C, based on the 8.0 mW/°C derating factor from the 1000 mW rating at 25°C. Exceeding this limit risks junction temperature exceeding 150°C. This value is specified in Table 6.6 (Dissipation Ratings) for the "P" package and applies directly to the SN75452BPE4 under continuous 300 mA load conditions.