Texas Instruments SN74HC08DTE4

Overview

SN74HC08DTE4 from Texas Instruments is a quadruple 2-input AND gate IC in 14-pin SOIC package, performing Y = A ● B Boolean logic in positive logic with buffered CMOS inputs, 2V–6V supply range, and –40°C to +85°C operating temperature. It delivers 5.2 mA output drive at 6 V, supports up to 10 LSTTL loads, and is used for signal enablement and power-good combination in industrial control and motor controller reset circuits.

For engineers reviewing the SN74HC08DTE4 datasheet, SN74HC08DTE4 pinout, SN74HC08DTE4 application, or SN74HC08DTE4 equivalent, this page provides verified functional identity, confirmed SOIC-14 pin mapping, real-world timing (tpd ≤ 25 ns at 4.5 V), thermal metrics (RθJA = 133.6°C/W), and validated alternative options for logic-level AND gate replacement.

Technical Context

The SN74HC08DTE4 implements four independent, non-inverting 2-input AND gates using balanced CMOS push-pull outputs capable of sourcing and sinking symmetric current (±4 mA at 4.5 V, ±5.2 mA at 6 V). Its standard CMOS inputs exhibit low leakage (±1 µA max) and 10 pF input capacitance, requiring fast edge rates (≤400 ns transition time at 6 V) to prevent oscillation.

Each gate operates across 2V–6V supply with rail-to-rail output swing, VOH ≥ 4.4 V and VOL ≤ 0.4 V under 4 mA load at 4.5 V, and features internal clamp diodes for ESD protection (±2000 V HBM). Unused inputs must be tied to VCC or GND to ensure deterministic logic states.

Key Specifications

Pinout & Package

SN74HC08DTE4 is housed in a 14-pin SOIC (D) package measuring 8.65 mm × 6.00 mm (body: 8.65 mm × 3.90 mm), with gull-wing leads and surface-mount compatibility.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 2-input AND gate applications.

Compared with SN74HC08DTE4, SN74HCT08DR offers guaranteed TTL input compatibility at the cost of higher quiescent current, while MC74HC08ADR2G provides identical functionality in a smaller TSSOP package - neither is pin-compatible without layout revision, but both satisfy equivalent logic and drive requirements in new designs.

Availability

SN74HC08DTE4 is available at Aetrix Electronics and suitable for industrial control, motor drive reset sequencing, and PLC input conditioning requiring stable component supply and long-term manufacturability.

Supply support for SN74HC08DTE4 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 decades of experience in high-reliability industrial and automotive-grade components.

The SN74HC08DTE4 belongs to TI's 74HC logic family, designed for low-power, wide-voltage-range digital interfacing in industrial automation, motor control, and power management systems where robustness and interoperability are essential.

FAQ

What logic family does SN74HC08DTE4 belong to, and how does it differ from 74LS or 74HCT variants?

SN74HC08DTE4 is part of the 74HC (High-Speed CMOS) logic family, featuring CMOS input thresholds (VIH ≈ 0.7×VCC, VIL ≈ 0.3×VCC), rail-to-rail outputs, and 2–6 V operation. Unlike 74LS (bipolar, 5 V only, higher power), it draws µA-level ICC. Versus 74HCT, SN74HC08DTE4 lacks TTL-compatible inputs - so it requires ≥3.15 V VIH at 4.5 V supply, whereas 74HCT08 accepts 2 V VIH. This makes SN74HC08DTE4 ideal for pure CMOS systems but less tolerant of mixed-voltage interfaces.

Can SN74HC08DTE4 operate reliably at 3.3 V, and what are its key performance metrics at that voltage?

Yes, SN74HC08DTE4 is fully specified at 3.3 V: VOH ≥ 3.15 V (min), VOL ≤ 0.33 V (max) at 4 mA load, tpd ≤ 30 ns (max), and input thresholds VIH = 2.31 V (min), VIL = 0.99 V (max). Its 20 pF power dissipation capacitance and ±1 µA input leakage ensure low dynamic and static power consumption in 3.3 V embedded systems - making SN74HC08DTE4 well-suited for FPGA I/O expansion and MCU peripheral enable logic.

How should unused inputs on SN74HC08DTE4 be terminated, and why is this required?

All unused inputs on SN74HC08DTE4 must be tied to either VCC or GND - never left floating. Floating CMOS inputs cause undefined logic states, increased ICC, and potential oscillation due to noise coupling into high-impedance nodes. A 10 kΩ pull-up or pull-down resistor is recommended for flexibility; direct connection is acceptable if the input is permanently inactive. This requirement applies to every unused 1A–4B pin to guarantee deterministic operation of SN74HC08DTE4 in industrial environments.

What is the maximum capacitive load SN74HC08DTE4 can drive while maintaining specified timing and voltage levels?

SN74HC08DTE4 is characterized for loads ≤70 pF per output while meeting all datasheet timing (tpd, tt) and voltage (VOH, VOL) specifications. Driving larger capacitive loads (e.g., long PCB traces or multiple inputs) increases propagation delay and may degrade VOL/VOH margins. To maintain integrity with >70 pF loads, add a series resistor (e.g., 33 Ω) between SN74HC08DTE4 output and the load to limit peak current and suppress ringing - consistent with TI's layout guidance in the SN74HC08 datasheet.

Is SN74HC08DTE4 RoHS compliant, and what is its moisture sensitivity level (MSL)?

Yes, SN74HC08DTE4 is RoHS compliant with lead-free NiPdAu (NIPDAU) or Sn (SN) lead finish, per TI's packaging documentation. Its SOIC (D) package carries an MSL rating of Level-1 (unlimited floor life) at ≤30°C/85% RH, meaning no bake preconditioning is required before reflow soldering - simplifying manufacturing for SN74HC08DTE4 in high-volume industrial PCB assembly.