Texas Instruments CD74HCT541M96E4

Overview

CD74HCT541M96E4 from Texas Instruments is a non-inverting octal buffer and line driver with three-state outputs, designed for bidirectional bus interfacing in industrial control and data acquisition systems. It operates at 4.5–5.5 V, delivers 15 LSTTL load drive capability, exhibits 11 ns typical propagation delay (VCC = 5 V, CL = 15 pF), and supports –55°C to +125°C ambient operation.

For engineers reviewing the CD74HCT541M96E4 datasheet, CD74HCT541M96E4 pinout, CD74HCT541M96E4 application, or CD74HCT541M96E4 equivalent, key selection considerations include its HCT-level TTL-compatible inputs, dual output-enable control (OE1/OE2), SOIC-20 package thermal performance (RθJA = 109.1°C/W), and guaranteed three-state leakage (±5 μA max).

Technical Context

The CD74HCT541M96E4 implements eight independent non-inverting buffer channels, each with separate input and output terminals, controlled by two active-low output-enable signals (OE1, OE2). Both enables must be LOW for valid data transmission; either HIGH forces all outputs into high-impedance state.

Its HCT logic family ensures direct compatibility with standard TTL input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) while maintaining CMOS power efficiency. The device features balanced rise/fall times (12–15 ns typical), low input leakage (±1 μA), and robust noise immunity (30% of VCC at 5 V).

Key Specifications

Pinout & Package

CD74HCT541M96E4 is housed in a 20-pin SOIC (DW) package measuring 12.80 mm × 7.50 mm, with standard 0.65 mm lead pitch and RoHS-compliant NiPdAu lead finish. It meets JEDEC MO-153 mechanical specifications and carries MSL Level-1 rating (unlimited floor life at ≤30°C/60% RH).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal buffer and line driver applications.

Compared with SN74HCT244N and 74ACT541SCX, CD74HCT541M96E4 provides unique dual-output-enable flexibility for granular bus control, maintains lowest quiescent current in its class, and offers superior thermal ruggedness for extended-temperature deployments - making it optimal for industrial and aerospace bus isolation where reliability trumps raw speed.

Availability

CD74HCT541M96E4 is available at Aetrix Electronics and suitable for industrial automation, avionics subsystems, and automotive electronic control units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CD74HCT541M96E4 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

CD74HCT541M96E4 belongs to TI's legacy CD74HCT logic family, engineered for robust interoperability with legacy TTL systems while delivering CMOS power efficiency and extended-temperature reliability in mission-critical infrastructure.

FAQ

What is the recommended bypass capacitor for CD74HCT541M96E4?

A 0.1-μF ceramic capacitor is recommended directly between VCC (pin 20) and GND (pin 19) to suppress high-frequency noise and stabilize the supply rail. For enhanced broadband filtering, TI recommends paralleling this with a 1-μF capacitor placed near the same pins. Placement must be as close as possible to the device leads to minimize inductance and ensure effective decoupling across the full operating temperature range of CD74HCT541M96E4.

Can CD74HCT541M96E4 interface directly with 3.3 V microcontrollers?

No - CD74HCT541M96E4 requires a 4.5–5.5 V supply and has TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), so 3.3 V logic outputs may not reliably meet VIH. Direct connection risks marginal or failed high-level recognition. To interface with 3.3 V MCUs, use a level-shifter IC or resistor-divider network that ensures VIH ≥ 2.0 V at CD74HCT541M96E4 inputs while respecting its input leakage specification (±1 μA).

What happens if only one of OE1 or OE2 is asserted LOW on CD74HCT541M96E4?

If either OE1 (pin 17) or OE2 (pin 18) is HIGH, all eight outputs (Y0–Y7) enter high-impedance state regardless of input or other enable status. Both OE1 and OE2 must be LOW simultaneously for outputs to reflect their respective inputs (A0–A7). This dual-enable architecture prevents accidental bus activation and supports fail-safe bus arbitration schemes in CD74HCT541M96E4-based systems.

Is CD74HCT541M96E4 pin-compatible with CD74HC541M96?

Yes - CD74HCT541M96E4 and CD74HC541M96 share identical SOIC-20 (DW) pinout, terminal functions, and mechanical footprint. However, they differ electrically: CD74HC541M96 operates from 2–6 V and has CMOS input thresholds, while CD74HCT541M96E4 is restricted to 4.5–5.5 V with TTL-compatible inputs. Substitution requires verifying supply voltage and source logic family compatibility before replacing CD74HCT541M96E4.

What is the maximum continuous output current per pin for CD74HCT541M96E4?

The absolute maximum continuous output current per pin for CD74HCT541M96E4 is ±25 mA (source or sink), as specified in the Absolute Maximum Ratings table. For reliable operation within recommended conditions, TI specifies ±6 mA for TTL loads and ±20 μA for CMOS loads. Exceeding ±25 mA risks permanent damage; sustained operation above ±6 mA should include thermal derating analysis using RθJA = 109.1°C/W and ambient temperature constraints.