Texas Instruments SN7407N

Overview

SN7407N from Texas Instruments is a hex buffer/driver IC with open-collector outputs, designed for TTL-to-MOS level translation and high-current sinking (40 mA per channel) in industrial control and display driver circuits. It features 30 V output voltage tolerance, 14 ns typical propagation delay, and operates from 4.75 V to 5.25 V supply at 0°C to 70°C.

For engineers reviewing the SN7407N datasheet, SN7407N pinout, SN7407N application, or SN7407N equivalent, this page delivers verified electrical specs, PDIP-14 package details, functional truth table (Y = A), sink-current capability, and real-world use cases in indicator lamp driving and bus interface isolation.

Technical Context

The SN7407N implements six independent non-inverting open-collector buffers, each performing Y = A in positive logic. Its inputs are diode-clamped for transmission-line effect suppression, and outputs tolerate up to 30 V while sinking up to 40 mA-enabling direct drive of lamps, relays, and MOS gates without external pull-ups.

It operates within strict TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2 V) and delivers 0.4 V max VOL at 16 mA sink load. Thermal resistance is 52.1°C/W (junction-to-ambient, PDIP package), supporting stable operation under continuous 40 mA per output at room temperature.

Key Specifications

Pinout & Package

SN7407N is housed in a 14-pin plastic dual in-line package (PDIP), body size 19.30 mm × 6.35 mm, with through-hole mounting and RoHS-compliant NiPdAu lead finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex open-collector buffer applications.

Compared with SN7406N and 74LS07N, SN7407N uniquely combines 30 V output tolerance, 40 mA sink strength, and diode-clamped inputs-making it the only choice among these three for robust industrial I/O expansion where voltage translation and EMI resilience are both required.

Availability

SN7407N is available at Aetrix Electronics and suitable for industrial control panels, LED display drivers, legacy bus interface isolation, and relay/optocoupler drivers requiring stable component supply across multi-year production cycles.

Supply support for SN7407N 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, with over 50 years of innovation in industrial, automotive, and communications markets.

SN7407N belongs to TI's classic 74xx TTL logic family, engineered specifically for reliable level translation and high-current digital interfacing in harsh electrical environments.

FAQ

What is the maximum output voltage rating for SN7407N?

The SN7407N has a maximum output voltage rating of 30 V, meaning its open-collector outputs can safely withstand up to 30 V when in the OFF (high-impedance) state. This allows direct connection to 24 V industrial loads without external clamping components. The rating applies across the full operating temperature range (0°C to 70°C) and is validated per TI's SDLS032H datasheet Section 6.1.

Can SN7407N drive multiple TTL inputs simultaneously?

Yes, SN7407N can drive multiple TTL inputs simultaneously: each output sinks up to 40 mA, and standard TTL inputs draw approximately 1.6 mA low-level current. Therefore, a single SN7407N output can reliably drive up to 25 standard TTL inputs (40 mA ÷ 1.6 mA ≈ 25) without exceeding its sink limit. This capability is confirmed in the Electrical Characteristics table (Section 6.5) of the SN7407N datasheet.

Does SN7407N require external pull-up resistors on its outputs?

Yes, SN7407N requires external pull-up resistors on all six open-collector outputs (1Y–6Y) to establish a defined HIGH logic level. The device itself only provides sinking capability; without a pull-up, outputs float in the OFF state. Typical values range from 1 kΩ (for fast rise times with capacitive loads) to 10 kΩ (for low power), selected based on load capacitance and required edge speed.

What is the propagation delay of SN7407N at 5 V supply?

The SN7407N exhibits a typical propagation delay of 14 ns from input to output (A to Y) at VCC = 5 V and TA = 25°C, with RL = 110 Ω and CL = 15 pF. Maximum delay is 30 ns under worst-case conditions. These values are measured per Figure 2 and Table 6.6 in the official TI SDLS032H datasheet and define timing margins for synchronous control and address latching applications.

How does SN7407N differ from SN7417N?

SN7407N and SN7417N share identical pinout and package but differ in output voltage rating: SN7407N supports up to 30 V on outputs, while SN7417N is rated for only 15 V. Both deliver 40 mA sink current and match in timing, input compatibility, and thermal specs. The 30 V rating makes SN7407N suitable for 24 V industrial systems; SN7417N is restricted to lower-voltage applications like 12 V automotive subsystems.