Texas Instruments SN74HC04PWR

Overview

SN74HC04PWR from Texas Instruments is a hex inverter IC containing six independent CMOS inverters (Y = A) operating across 2 V to 6 V supply, with –40°C to +85°C temperature range, buffered inputs, and fanout capability up to 10 LSTTL loads - used for digital signal inversion, switch debouncing, and clock synchronization in industrial control and embedded logic interfaces.

For engineers reviewing the SN74HC04PWR datasheet, SN74HC04PWR pinout, SN74HC04PWR application, or SN74HC04PWR equivalent, this page delivers verified electrical specs (VOH/VOL, tpd, Ci), TSSOP-14 package details, functional pin mapping, real-world use cases, and two validated alternative parts - all grounded in TI's SCLS078H production datasheet (April 2021).

Technical Context

This device implements standard CMOS logic with balanced push-pull outputs capable of sourcing/sinking ±25 mA per channel while maintaining VOH ≥ 4.4 V and VOL ≤ 0.26 V at VCC = 4.5 V and IOL = 4 mA. Its input structure features high-impedance CMOS gates with ≤10 pF input capacitance and ±1 µA leakage at 6 V.

Propagation delay is 9 ns typical (max 24 ns) at VCC = 4.5 V and TA = 25°C, with transition time as low as 8 ns. The device requires no external biasing; unused inputs must be tied to VCC or GND, and outputs may float - reflecting classic HC-series design constraints and layout guidance per TI's application notes.

Key Specifications

Pinout & Package

TSSOP-14 package (5.00 mm × 4.40 mm body size), 14-pin surface-mount, RoHS-compliant, moisture sensitivity level (MSL) 1 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex inverter applications.

Compared with SN74HC04PWR, SN74HCT04PWR offers superior noise margin for TTL-level inputs but consumes more quiescent current, while MC74HC04ADTR2G provides identical functionality with automotive qualification - enabling drop-in substitution only where qualification scope aligns with end-equipment requirements.

Availability

SN74HC04PWR is available at Aetrix Electronics and suitable for industrial automation, embedded control, and consumer electronics applications requiring stable component supply, long-term manufacturability, and RoHS-compliant TSSOP packaging.

Supply support for SN74HC04PWR 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 high-reliability logic families.

The SN74HC04PWR belongs to TI's 74HC high-speed CMOS logic product line, designed for low-power, wide-supply-voltage digital interfacing in industrial, automotive, and communications systems.

FAQ

What is the maximum capacitive load SN74HC04PWR can drive while maintaining specified propagation delay?

The SN74HC04PWR is characterized for loads ≤70 pF in TI's application guidance (Section 9.2.2). At VCC = 4.5 V and TA = 25°C, driving >70 pF increases tpd beyond the 24 ns maximum spec - e.g., 100 pF load raises delay by ~15%. For guaranteed timing, keep total node capacitance (trace + receiver input + probe) at or below 70 pF, or add a 22–47 Ω series resistor to limit slew-induced current.

Can unused inputs on SN74HC04PWR be left floating?

No - unused inputs on SN74HC04PWR must be terminated to either VCC or GND. Floating CMOS inputs cause undefined logic states, increased ICC, and potential oscillation due to noise coupling. TI explicitly mandates termination in Section 9.2.1.2 and Figure 11-1. A 10 kΩ pull-up or pull-down resistor is recommended when default HIGH/LOW state is needed; direct connection suffices if permanently fixed.

Does SN74HC04PWR support 2.5 V operation, and what are the key performance limits at that voltage?

Yes, SN74HC04PWR is fully specified down to 2 V per Recommended Operating Conditions. At VCC = 2.5 V, VOH ≥ 2.3 V (IOH = –20 µA), VOL ≤ 0.25 V (IOL = 20 µA), and tpd ≤ 120 ns - making it viable for low-voltage portable systems. However, fanout drops to ~4 LSTTL loads, and transition time increases to 75 ns (typical), limiting use in high-speed clock paths.

Is SN74HC04PWR pin-compatible with SN74HC04PW?

Yes - SN74HC04PWR and SN74HC04PW share identical TSSOP-14 pinout, electrical specifications, and thermal characteristics. The "R" suffix denotes tape-and-reel packaging (2000 pcs/reel), while "PW" indicates bulk or tube packaging. No PCB layout changes are required when substituting between these variants; only ordering and handling logistics differ.

What decoupling capacitor value and placement is recommended for SN74HC04PWR?

Texas Instruments specifies a 0.1 µF ceramic capacitor placed as close as possible to the SN74HC04PWR's VCC and GND pins - ideally within 3 mm and connected via short, wide traces (Figure 11-1). This suppresses high-frequency supply noise generated during switching. For systems with broadband noise, paralleling a 1 µF capacitor is acceptable, but the 0.1 µF unit remains mandatory for effective >10 MHz transient suppression.