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Home > Products > Integrated Circuits (ICs) > Logic > Comparators

Nexperia USA Inc. 74HC85DB,118

Name: 74HC85DB,118
Brand: Nexperia USA Inc.
SKU: 74HC85DB,118
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74HC85DB,118

Manufacturer:: Nexperia USA Inc.

Category:: Comparators

Package:: -

Datasheet:: 74HC85DB,118.pdf

Description:: NEXPERIA 74HC85DB - MAGNITUDE CO

Quantity:: RFQ Add To RFQ list

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Inventory:4,000

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Product details

Overview

74HC85DB,118 from Nexperia is a 4-bit magnitude comparator IC that performs high-speed A=B, A<B, and A>B comparisons with CMOS-level power efficiency and TTL-compatible input thresholds. It operates from 2.0 V to 6.0 V, features typical propagation delay of 16 ns at 4.5 V, and drives up to 10 LSTTL loads. It is used in digital arithmetic units, address decoding logic, and priority encoders where bit-wise magnitude evaluation is required.

For engineers reviewing the 74HC85DB,118 datasheet, 74HC85DB,118 pinout, 74HC85DB,118 application, or 74HC85DB,118 equivalent, key selection considerations include cascading capability via I_A>B, I_A=B, and I_A<B inputs, guaranteed noise immunity over full supply range, and SO-16 package thermal performance for dense PCB layouts.

Technical Context

The 74HC85DB,118 implements combinational logic using standard CMOS process technology, with fully buffered inputs and outputs. Its internal architecture supports daisy-chain expansion of multi-bit comparisons through three dedicated cascade inputs and corresponding outputs, enabling 8-, 12-, or 16-bit magnitude evaluation without external logic.

All outputs are active-high and fully specified across the entire operating voltage (2.0–6.0 V) and temperature (−40 °C to +125 °C) range. Input hysteresis ensures robust switching against slow-rising signals, and output drive strength meets ±5.2 mA at V_CC = 4.5 V.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Family	74HC - high-speed CMOS with TTL-compatible input levels and low static current
Function	4-bit magnitude comparator - evaluates A vs B and asserts A>B, A=B, A<B simultaneously
Supply Voltage	2.0 V to 6.0 V - supports mixed-voltage system interfacing and battery-powered operation
Propagation Delay	16 ns typical at V_CC = 4.5 V - enables use in 25 MHz+ synchronous digital systems
Output Drive	±5.2 mA at V_CC = 4.5 V - directly interfaces with LSTTL, 74HCT, and other 5 V logic families
Operating Temperature	−40 °C to +125 °C - qualified for industrial and automotive under-hood applications

Pinout & Package

74HC85DB,118 is housed in a 16-pin SO (Small Outline) package with 1.27 mm pitch, JEDEC MS-012AC compliant, and rated for surface-mount reflow assembly.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4	A₀–A₃ inputs	4-bit parallel data input A for comparison
5, 6, 7, 8	B₀–B₃ inputs	4-bit parallel data input B for comparison
9, 10, 11	I_A<B, I_A=B, I_A>B	Cascade inputs for multi-chip magnitude chaining
12, 13, 14	A<B, A=B, A>B outputs	Active-high status outputs reflecting comparison result
15	GND	Ground reference for logic and power return path
16	V_CC	Positive supply rail (2.0–6.0 V)

Key Features

Feature	Design Value
Wide supply voltage range	2.0 V to 6.0 V - eliminates need for level shifters in mixed-supply designs
Cascadable architecture	Three dedicated cascade I/Os enable seamless expansion to any bit width without glue logic
High noise immunity	Input hysteresis ≥ 0.5 V at V_CC = 4.5 V - suppresses false triggering on noisy control lines
Industrial temperature rating	−40 °C to +125 °C - supports deployment in motor control, PLC, and power conversion environments

Applications

Microcontroller Address Decoding

Digital Panel Meter Logic

Use Scenario: Microcontroller selects peripheral devices by comparing address bus bits against fixed decode ranges.

IC Role / Device Role / Timing Role: Performs real-time 4-bit address window matching with sub-20 ns latency.

Use Value: Reduces decode logic gate count by 70% versus discrete NAND/NOR implementation.

Use Scenario: Digital multimeter compares measured ADC output against threshold values to drive segment drivers.

IC Role / Device Role / Timing Role: Provides deterministic magnitude decision for auto-ranging and overload detection.

Use Value: Enables single-cycle threshold evaluation without CPU intervention or firmware overhead.

Programmable Logic Controller (PLC) I/O Mapping

Industrial Motor Control Sequencing

Use Scenario: PLC base unit maps incoming I/O module addresses to internal memory-mapped registers.

IC Role / Device Role / Timing Role: Acts as hardwired address comparator in backplane interface logic.

Use Value: Guarantees deterministic response time (<25 ns) for safety-critical I/O arbitration.

Use Scenario: Motor drive controller validates encoder position against commanded setpoints before enabling PWM stages.

IC Role / Device Role / Timing Role: Executes real-time position window check in analog-to-digital feedback loop.

Use Value: Prevents unsafe actuation by rejecting out-of-range position data prior to gate driver activation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 4-bit magnitude comparator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74HC85DR	Same logic function and pinout; SOIC-16 package but different moisture sensitivity level (MSL3 vs MSL1)	Designed for standard automated assembly; lacks extended temperature qualification (−40 °C to +125 °C)	Select when cost-sensitive commercial-grade operation suffices and extended temp is not required.
74HCT85DB,118	Identical pinout and function but TTL-input thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V); same SO-16 package	Optimized for direct interface with legacy 5 V TTL or LSTTL systems without level translation	Select when interfacing with older microcontrollers or logic families requiring strict TTL input compatibility.

Compared with SN74HC85DR, 74HC85DB,118 offers wider temperature support and tighter propagation delay consistency; compared with 74HCT85DB,118, it provides superior noise margin in mixed-voltage CMOS systems but requires compatible input voltage levels.

Availability

74HC85DB,118 is available at Aetrix Electronics and suitable for industrial control systems, programmable logic modules, and digital instrumentation requiring stable component supply across long production lifecycles.

Supply support for 74HC85DB,118 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, discrete, and MOSFET solutions for industrial, automotive, and computing markets.

The 74HC logic family delivers robust, pin-compatible replacements for legacy TTL with CMOS power efficiency and enhanced ESD tolerance, targeting cost-sensitive yet reliability-demanding digital control applications.

FAQ

Can 74HC85DB,118 be operated at 3.3 V?

Yes. The device is fully specified from 2.0 V to 6.0 V, including 3.3 V operation. At V_CC = 3.3 V, propagation delay increases to 22 ns typical, and output drive reduces to ±4.0 mA, both within guaranteed limits per datasheet Section 7.2 and Table 9.

Is 74HC85DB,118 pin-compatible with 74LS85?

No. While functionally identical, 74HC85DB,118 uses SO-16 packaging and has different pin assignments than the through-hole DIP-16 74LS85. Pin mapping differs for cascade inputs and outputs; direct replacement requires PCB redesign or adapter.

What is the maximum clock frequency supported by 74HC85DB,118?

The 74HC85DB,118 is a combinational logic device with no internal clock. Its effective throughput is governed by propagation delay: at 4.5 V, 16 ns delay supports reliable operation in synchronous systems with clock periods ≥ 32 ns (i.e., ≤ 31.25 MHz), assuming setup/hold timing margins are met.

Does 74HC85DB,118 support hot insertion?

No. The device lacks hot-swap protection circuitry such as power-up sequencing control or I_OFF isolation. Applying V_CC while inputs are driven can cause latch-up or excessive current draw. Power must be applied before signal inputs in system-level design.

74HC85DB,118 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Type:: -

Number of Bits:: -

Output:: -

Output Function:: -

Voltage - Supply:: -

Current - Output High, Low:: -

Max Propagation Delay @ V, Max CL:: -

Current - Quiescent (Iq):: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Supplier Device Package:: -

Mounting Type:: -

74HC85DB,118 FAQ

1.How can I place an order for 74HC85DB,118 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74HC85DB,118 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 74HC85DB,118 reliable?

The price and inventory of 74HC85DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC85DB,118 is usually 5 days.

3.What payment methods are accepted for 74HC85DB,118?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC85DB,118 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74HC85DB,118?

74HC85DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74HC85DB,118 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 74HC85DB,118?

For technical support, including 74HC85DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC85DB,118 requirements.

6.How does Aetrix verify that 74HC85DB,118 is sourced from the original manufacturer or authorized distributors?

All 74HC85DB,118 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 74HC85DB,118 meets industry standards.

7.What is the process for return or replacement of 74HC85DB,118?

All 74HC85DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC85DB,118, 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 74HC85DB,118 part is unused and in its original packaging.

Return procedure for 74HC85DB,118:

1.Submit a request within 90 days.

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

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