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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

STMicroelectronics M74HC365B1R

Name: M74HC365B1R
Brand: STMicroelectronics
SKU: M74HC365B1R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: M74HC365B1R

Manufacturer:: STMicroelectronics

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 16-DIP (0.300", 7.62mm)

Datasheet:: M74HC365B1R.pdf

Description:: IC BUFFER NON-INVERT 6V 16DIP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

M74HC365B1R from STMicroelectronics is a hex non-inverting 3-state bus buffer IC used for bidirectional data routing and load isolation in digital logic systems. It operates across 2 V to 6 V, delivers 6 mA output drive (min), exhibits 10 ns typical propagation delay at 6 V, and supports industrial temperature range (–55 °C to +125 °C) in SO16 package - commonly deployed in industrial PLC I/O modules and legacy microcontroller address/data bus expansion.

For engineers reviewing the M74HC365B1R datasheet, M74HC365B1R pinout, M74HC365B1R application, or M74HC365B1R equivalent, key selection criteria include 3-state enable timing (tPZL/tPLZ ≤ 23 ns at 6 V), high noise immunity (VNIH/VNIL ≥ 28 % VCC), symmetrical output drive, and compatibility with 74-series logic families in space-constrained PCB layouts.

Technical Context

The M74HC365B1R implements six independent non-inverting buffers, each controlled by dual active-low enable inputs (G1 and G2). All outputs enter high-impedance state unless both enables are simultaneously low - enabling precise bus arbitration in multi-master systems.

It uses silicon gate C2MOS technology for low static current (ICC ≤ 4 μA at 25 °C) and wide supply tolerance (2–6 V), with ESD protection rated at 2 kV HBM. Propagation delays are balanced (tPLH ≅ tPHL), and input/output capacitance is specified at 5 pF and 27 pF respectively.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply voltage	2 V to 6 V - supports mixed-voltage system interfacing (e.g., 3.3 V MCU to 5 V peripheral)
Propagation delay (tPD)	10 ns (typ.) at VCC = 6 V - enables reliable operation up to ~35 MHz bus toggle rate
Output drive (IOH/IOL)	±6 mA (min.) - sufficient to drive 10 LS-TTL loads or 20 CMOS inputs at 6 V
Quiescent current (ICC)	4 μA (max.) at TA = 25 °C - critical for low-power standby modes in battery-backed systems
Noise immunity	VNIH/VNIL ≥ 28 % VCC (min.) - ensures robust operation in electrically noisy industrial environments
ESD rating	HBM: 2 kV - meets basic handling requirements without special ESD controls during assembly

Pinout & Package

Package: SO16 (Small Outline, 16-pin, 3.9 mm body width, 1.27 mm pitch).

Pin/Terminal	Circuit Role	Design Meaning
1, 15	G1, G2	Active-low dual enable inputs - both must be low to activate all six buffers; enables fail-safe bus hold
2, 4, 6, 10, 12, 14	1A–6A	Non-inverting data inputs - accept standard CMOS/TTL logic levels across full VCC range
3, 5, 7, 9, 11, 13	1Y–6Y	Non-inverting buffered outputs - present high-impedance state when G1/G2 not both low
8	GND	Ground reference - must be low-inductance connection to minimize switching noise coupling
16	VCC	Positive supply - decoupling capacitor (100 nF ceramic) required within 5 mm of pin for stable AC performance

Key Features

Feature	Design Value
High-speed operation	tPD = 10 ns (typ.) at 6 V - reduces bus contention window in time-critical control loops
Low-power quiescent mode	ICC ≤ 4 μA - allows integration into always-on monitoring circuits without thermal penalty
Symmetrical output drive	\|IOH\| = IOL = 6 mA (min.) - prevents signal skew on shared buses with capacitive loading
Wide voltage compatibility	VCC = 2–6 V - eliminates level-shifter need between 2.5 V, 3.3 V, and 5 V subsystems
Pin-compatible with 74 series	Direct drop-in replacement for 74LS365/74HC365 - simplifies legacy design refresh

Applications

Industrial PLC Backplane Interface

Legacy Microcontroller Bus Expansion

Use Scenario: Isolating and buffering address/data lines between CPU and modular I/O cards in DIN-rail mounted controllers.

IC Role / Device Role / Timing Role: Non-inverting 3-state buffer enabling time-multiplexed access to shared memory-mapped peripherals.

Use Value: Prevents bus contention during card hot-swap; 6 mA drive sustains signal integrity over 15 cm backplane traces at 10 MHz.

Use Scenario: Extending 8-bit data bus of 8051 or Z80-based embedded systems to external SRAM or EPROM.

IC Role / Device Role / Timing Role: Bidirectional bus driver with controlled enable timing to meet memory access setup/hold windows.

Use Value: 10 ns tPD ensures compatibility with sub-100 ns memory read cycles; SO16 footprint fits dense legacy PCB layouts.

Automotive Body Control Module

Test Equipment Signal Routing

Use Scenario: Level-shifting and isolating sensor interface signals (e.g., LIN transceiver control lines) in BCMs operating at 5 V.

IC Role / Device Role / Timing Role: Voltage-tolerant buffer ensuring clean signal transfer between MCU GPIO and external drivers.

Use Value: 28 % VCC noise margin rejects ignition-induced transients; AEC-Q100 qualified variants available for production use.

Use Scenario: Multiplexing DUT signals to measurement instruments (oscilloscopes, logic analyzers) in automated test fixtures.

IC Role / Device Role / Timing Role: 3-state switch enabling dynamic reconfiguration of signal paths without physical rewiring.

Use Value: High-impedance disable time (tPHZ ≤ 23 ns) permits rapid channel switching at >20 MHz scan rates.

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex non-inverting 3-state buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74HC365N	DIP-16 package only; no automotive qualification; ICC = 8 μA (max.) at 25 °C	Limited to through-hole prototyping or legacy repair; unsuitable for surface-mount production or automotive environments	Select if DIP socketing or breadboard validation is required; avoid for new SMT designs
74VHC365M	Faster tPD = 5.5 ns (typ.) at 5 V; higher ICC = 20 μA (max.); narrower VCC = 2–5.5 V	Better for high-speed instrumentation but less tolerant of 6 V rail fluctuations or low-power sleep states	Prefer for <50 MHz timing-critical paths where power budget allows; verify 6 V compatibility is unnecessary

Compared with SN74HC365N and 74VHC365M, the M74HC365B1R offers optimal balance of industrial temperature range, SO16 SMT compatibility, ultra-low ICC, and 6 V operation - making it preferred for cost-sensitive, space-constrained, and thermally demanding embedded control applications.

Availability

M74HC365B1R is available at Aetrix Electronics and suitable for industrial automation interfaces, legacy microcontroller bus expansion, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for M74HC365B1R 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, specializing in microcontrollers, power management, analog, and automotive-grade ICs with strong industrial and automotive focus.

The M74HC365 belongs to ST's HC logic family - designed for high-speed, low-power, pin-compatible upgrades of legacy TTL systems in harsh-environment industrial and transportation applications.

FAQ

What is the maximum clock frequency supported by M74HC365B1R?

The M74HC365B1R is not a clocked device and has no internal clock; its usable toggle rate depends on propagation delay and load. With tPD = 10 ns (typ.) and CL = 50 pF, it reliably supports data bus toggling up to approximately 35 MHz under ideal conditions. System-level timing must account for board trace capacitance and enable signal skew.

Can M74HC365B1R drive LEDs directly?

No - the M74HC365B1R is a logic buffer, not a power driver. Its ±6 mA output rating is insufficient for typical LEDs (requiring 10–20 mA). Direct LED connection risks violating VOL/VOH specs and may cause output voltage droop or latch-up. Use a dedicated LED driver or transistor stage instead.

Is M74HC365B1R compatible with 3.3 V microcontrollers?

Yes - the M74HC365B1R operates down to 2 V and accepts 3.3 V logic inputs as valid HIGH (VIH ≥ 2.31 V at VCC = 3.3 V per datasheet). When powered at 3.3 V, its VOH exceeds 3.1 V, ensuring reliable interfacing with 3.3 V CMOS inputs without level shifters.

Does M74HC365B1R require external pull-up or pull-down resistors on enable pins?

No - G1 and G2 have no internal pull resistors and must be actively driven. Leaving them floating risks undefined output states. For fail-safe operation, tie unused enables to VCC via 10 kΩ resistors (to force high-impedance) or use a dedicated control signal synchronized with bus activity.

M74HC365B1R Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: 74HC

Package/Case:: 16-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Obsolete

Logic Type:: Buffer, Non-Inverting

Number of Elements:: 1

Number of Bits per Element:: 6

Input Type:: -

Output Type:: 3-State

Current - Output High, Low:: 7.8mA, 7.8mA

Voltage - Supply:: 2V ~ 6V

Operating Temperature:: -55°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 16-DIP

M74HC365B1R FAQ

1.How can I place an order for M74HC365B1R through Aetrix?

Please submit a Request for Quotation (RFQ) for M74HC365B1R on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for M74HC365B1R reliable?

The price and inventory of M74HC365B1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M74HC365B1R is usually 5 days.

3.What payment methods are accepted for M74HC365B1R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M74HC365B1R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for M74HC365B1R?

M74HC365B1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your M74HC365B1R order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for M74HC365B1R?

For technical support, including M74HC365B1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M74HC365B1R requirements.

6.How does Aetrix verify that M74HC365B1R is sourced from the original manufacturer or authorized distributors?

All M74HC365B1R products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that M74HC365B1R meets industry standards.

7.What is the process for return or replacement of M74HC365B1R?

All M74HC365B1R units undergo pre-shipment inspection (PSI). If there is an issue with M74HC365B1R, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The M74HC365B1R part is unused and in its original packaging.

Return procedure for M74HC365B1R:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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