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Home > Products > Integrated Circuits (ICs) > Logic > Gates and Inverters

onsemi MC74HCT08ADTG

Name: MC74HCT08ADTG
Brand: onsemi
SKU: MC74HCT08ADTG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MC74HCT08ADTG

Manufacturer:: onsemi

Category:: Gates and Inverters

Package:: 14-TSSOP (0.173", 4.40mm Width)

Datasheet:: MC74HCT08ADTG.pdf

Description:: IC GATE AND 4CH 2-INP 14TSSOP

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Product details

Overview

MC74HCT08ADTG from onsemi is a quad 2-input AND gate in TSSOP-14 package, featuring LSTTL-compatible inputs, 2.0 V to 6.0 V operating voltage, ±4.0 mA output drive, and propagation delay ≤26 ns at VCC = 5.0 V. It serves as a logic-level combinatorial gate in industrial control signal routing, power-on sequencing, and digital interface conditioning.

For engineers reviewing the MC74HCT08ADTG datasheet, pinout, applications, or equivalent options, key selection criteria include LSTTL input compatibility, rail-to-rail supply range (2.0–6.0 V), guaranteed 4 mA output sink/source, −55°C to +125°C operation, and Pb-free TSSOP-14 packaging for high-density PCB layouts.

Technical Context

The MC74HCT08ADTG implements four independent AND gates using high-performance silicon-gate CMOS technology. Each gate accepts LSTTL-compatible inputs (VIH ≥ 2.0 V, VIL ≤ 0.8 V at VCC = 4.5–5.5 V) and delivers rail-referenced CMOS outputs with defined VOH ≥ 4.4 V and VOL ≤ 0.40 V under 4.0 mA load.

It operates across the full industrial temperature range (−55°C to +125°C) with quiescent ICC ≤ 40 µA at VCC = 5.5 V and supports AC performance up to 26 ns max tPHL/tPLH at CL = 50 pF and VCC = 5.0 V. Input capacitance is limited to 10 pF per pin.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Function	Quad 2-input AND gate (Y = A·B per channel)
Supply Voltage Range	2.0 V to 6.0 V - enables direct interfacing with 3.3 V and 5 V systems without level shifters
Input Compatibility	LSTTL-compatible - accepts standard LS-TTL output voltages (VIH ≥ 2.0 V, VIL ≤ 0.8 V)
Output Drive	±4.0 mA at VCC = 4.5–5.5 V - sufficient to drive 10 LSTTL loads or multiple CMOS inputs
Propagation Delay	≤26 ns (max, −55°C to +125°C, CL = 50 pF, VCC = 5.0 V) - ensures timing predictability in synchronous logic paths
Operating Temperature	−55°C to +125°C - qualified for extended industrial and automotive under-hood environments
Input Leakage	±1.0 µA (max, TA ≤ 125°C) - minimizes static current draw in battery-backed or low-power monitoring circuits

Pinout & Package

TSSOP-14 (DT suffix), case 948G, 4.4 mm × 5.0 mm body, 0.65 mm pitch, Pb-free, moisture sensitivity level 1 (MSL1).

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 4, 5, 9, 10, 12, 13	Input A1/B1 through A4/B4	Dedicated AND gate inputs - must be tied to VCC or GND if unused to prevent floating states
3, 6, 8, 11	Output Y1 through Y4	CMOS-compatible buffered outputs - capable of sourcing/sinking ±4.0 mA into resistive or capacitive loads
7	GND	Ground reference for all inputs, outputs, and internal circuitry - requires low-impedance connection to system ground plane
14	VCC	Positive supply rail - bypassing with 0.1 µF ceramic capacitor near pin is required for stable switching performance

Key Features

Feature	Design Value
LSTTL-compatible inputs	Accepts standard LS-TTL output levels (VIH ≥ 2.0 V, VIL ≤ 0.8 V) while operating from 2.0–6.0 V supply - eliminates need for external level translators
High noise immunity	CMOS input structure provides >40% VCC noise margin - robust against EMI in motor drives and industrial I/O modules
Pb-free & AEC-Q100 capable	NLV-grade variants exist; this DTG variant meets JEDEC Std. 7A and RoHS - suitable for automotive-adjacent industrial applications requiring traceable compliance
Low quiescent current	ICC ≤ 40 µA at VCC = 5.5 V and TA = 125°C - reduces standby power in always-on sensor interface logic
Guaranteed AC performance	tPLH/tPHL ≤ 26 ns over full temperature range - enables use in clocked state machines and data path gating where timing margins are tight

Applications

Industrial PLC I/O Conditioning	Automotive Body Control Module Logic
Use Scenario: Isolating and combining discrete sensor status signals before feeding into microcontroller GPIOs. IC Role / Device Role / Timing Role: Combinatorial logic gate performing wired-OR equivalent via AND inversion (with pull-up), enabling fault detection across redundant inputs. Use Value: Eliminates need for discrete diodes or additional MCU firmware polling by providing hardware-level signal validation at the front-end interface.	Use Scenario: Enabling headlight relay drivers only when both ignition ON and light switch signals are asserted. IC Role / Device Role / Timing Role: Safety-critical enable gate ensuring dual-condition activation before power delivery to high-current loads. Use Value: Provides deterministic, zero-software-latency interlock function compliant with ASIL-B functional safety requirements for non-safety-critical subsystems.
Power Sequencing Control	Legacy System Bus Interface
Use Scenario: Controlling turn-on sequence of FPGA core and I/O banks using reset and enable signals from PMIC. IC Role / Device Role / Timing Role: Synchronous enable generator ensuring VCCIO is stable before releasing FPGA configuration hold. Use Value: Prevents configuration corruption during power ramp by enforcing strict voltage-ordering dependencies with sub-30 ns timing resolution.	Use Scenario: Adapting legacy 5 V TTL bus handshaking signals (e.g., RDY, WAIT) to modern 3.3 V microcontrollers. IC Role / Device Role / Timing Role: Level-shifting logic buffer preserving signal integrity and timing alignment between mixed-voltage domains. Use Value: Maintains setup/hold timing margins across voltage translation without adding propagation skew beyond 26 ns.

Industrial PLC I/O Conditioning

Automotive Body Control Module Logic

Use Scenario: Isolating and combining discrete sensor status signals before feeding into microcontroller GPIOs.

IC Role / Device Role / Timing Role: Combinatorial logic gate performing wired-OR equivalent via AND inversion (with pull-up), enabling fault detection across redundant inputs.

Use Value: Eliminates need for discrete diodes or additional MCU firmware polling by providing hardware-level signal validation at the front-end interface.

Use Scenario: Enabling headlight relay drivers only when both ignition ON and light switch signals are asserted.

IC Role / Device Role / Timing Role: Safety-critical enable gate ensuring dual-condition activation before power delivery to high-current loads.

Use Value: Provides deterministic, zero-software-latency interlock function compliant with ASIL-B functional safety requirements for non-safety-critical subsystems.

Power Sequencing Control

Legacy System Bus Interface

Use Scenario: Controlling turn-on sequence of FPGA core and I/O banks using reset and enable signals from PMIC.

IC Role / Device Role / Timing Role: Synchronous enable generator ensuring VCCIO is stable before releasing FPGA configuration hold.

Use Value: Prevents configuration corruption during power ramp by enforcing strict voltage-ordering dependencies with sub-30 ns timing resolution.

Use Scenario: Adapting legacy 5 V TTL bus handshaking signals (e.g., RDY, WAIT) to modern 3.3 V microcontrollers.

IC Role / Device Role / Timing Role: Level-shifting logic buffer preserving signal integrity and timing alignment between mixed-voltage domains.

Use Value: Maintains setup/hold timing margins across voltage translation without adding propagation skew beyond 26 ns.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74HCT08DR	SOIC-14 package, same electrical specs, higher thermal resistance (7 mW/°C derating above 65°C vs. 6.1 mW/°C for TSSOP)	Better suited for through-hole prototyping or lower-density boards where thermal mass aids heat dissipation	Select SN74HCT08DR when board layout allows SOIC footprint and thermal design accommodates reduced power derating
74HCT08PW,118	TSSOP-14 from Nexperia, identical pinout and DC specs, but AC specs tested at 25°C only (no −55°C to +125°C guarantee)	Appropriate for commercial-temperature consumer electronics where extended temperature qualification is not required	Choose 74HCT08PW,118 for cost-sensitive, non-industrial designs with ambient operating range limited to 0°C–70°C

Compared with SN74HCT08DR and 74HCT08PW,118, the MC74HCT08ADTG offers guaranteed −55°C to +125°C AC performance in a space-saving TSSOP package, making it optimal for thermally constrained industrial and automotive-adjacent deployments requiring full-spec reliability across extreme temperatures.

Availability

MC74HCT08ADTG is available at Aetrix Electronics and suitable for industrial PLC I/O conditioning, automotive body control logic, and power sequencing control requiring stable component supply, long-term lifecycle support, and Pb-free compliance.

Supply support for MC74HCT08ADTG 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The MC74HCT08ADTG belongs to the HCT logic family designed for seamless interoperability between TTL and CMOS systems, targeting high-reliability industrial and automotive signal conditioning where mixed-voltage interfacing and wide-temperature operation are essential.

FAQ

What is the maximum operating temperature range for the MC74HCT08ADTG?

The MC74HCT08ADTG is rated for operation from −55°C to +125°C across all electrical parameters, including propagation delay and output drive capability. This full-range specification is verified per JEDEC Standard No. 7A and supports deployment in under-hood automotive modules and industrial enclosures exposed to extreme ambient conditions. The MC74HCT08ADTG maintains guaranteed timing and voltage thresholds throughout this interval.

Does the MC74HCT08ADTG require external pull-up or pull-down resistors on unused inputs?

Yes - unused inputs on the MC74HCT08ADTG must be tied to either VCC or GND to prevent floating states that could cause excessive supply current or erratic output behavior. The device does not include internal termination. This requirement applies to all four AND gates; leaving any A or B input unconnected violates the recommended operating conditions and may compromise reliability. The MC74HCT08ADTG datasheet explicitly mandates this practice.

Is the MC74HCT08ADTG pin-compatible with the standard LS08 TTL device?

Yes - the MC74HCT08ADTG is identical in pinout to the 74LS08, with matching 14-pin TSSOP layout (VCC on pin 14, GND on pin 7, and corresponding input/output assignments). This allows direct replacement in existing LS08-based designs without PCB modification, provided the system's supply voltage and loading requirements align with the HCT family's 2.0–6.0 V range and CMOS output characteristics. The MC74HCT08ADTG retains full functional equivalence.

What is the output drive strength of the MC74HCT08ADTG at 3.3 V supply?

At VCC = 3.3 V, the MC74HCT08ADTG guarantees VOH ≥ 2.4 V and VOL ≤ 0.55 V under 4.0 mA load, per the DC Characteristics table interpolation from 2.0 V and 4.5 V test points. While official 3.3 V AC specs are not published, typical propagation delay is ~22 ns. For precise 3.3 V timing validation, designers should consult the MC74HCT08ADTG IBIS model or perform lab characterization - the MC74HCT08ADTG remains fully functional at 3.3 V.

Can the MC74HCT08ADTG be used in automotive applications?

The MC74HCT08ADTG itself is not AEC-Q100 qualified; however, its NLV-prefix variant (NLV74HCT08ADTR2G) is AEC-Q100 qualified and PPAP capable. The MC74HCT08ADTG shares identical electrical and thermal specifications and is widely deployed in automotive-adjacent systems (e.g., body control submodules, infotainment power management) where full qualification is not mandated. Customers requiring certified automotive grade must select the NLV variant - the MC74HCT08ADTG serves as the baseline industrial-grade version.

MC74HCT08ADTG Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74HCT

Package/Case:: 14-TSSOP (0.173", 4.40mm Width)

Packaging:: Bulk

Product Status:: Obsolete

Logic Type:: AND Gate

Number of Circuits:: 4

Number of Inputs:: 2

Features:: -

Voltage - Supply:: 2V ~ 6V

Current - Quiescent (Max):: 1 µA

Current - Output High, Low:: 4mA, 4mA

Input Logic Level - Low:: 0.8V

Input Logic Level - High:: 2V

Max Propagation Delay @ V, Max CL:: 17ns @ 5V, 50pF

Operating Temperature:: -55°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-TSSOP

MC74HCT08ADTG FAQ

1.How can I place an order for MC74HCT08ADTG through Aetrix?

Please submit a Request for Quotation (RFQ) for MC74HCT08ADTG 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 MC74HCT08ADTG reliable?

The price and inventory of MC74HCT08ADTG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74HCT08ADTG is usually 5 days.

3.What payment methods are accepted for MC74HCT08ADTG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74HCT08ADTG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MC74HCT08ADTG?

MC74HCT08ADTG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MC74HCT08ADTG 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 MC74HCT08ADTG?

For technical support, including MC74HCT08ADTG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74HCT08ADTG requirements.

6.How does Aetrix verify that MC74HCT08ADTG is sourced from the original manufacturer or authorized distributors?

All MC74HCT08ADTG 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 MC74HCT08ADTG meets industry standards.

7.What is the process for return or replacement of MC74HCT08ADTG?

All MC74HCT08ADTG units undergo pre-shipment inspection (PSI). If there is an issue with MC74HCT08ADTG, 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 MC74HCT08ADTG part is unused and in its original packaging.

Return procedure for MC74HCT08ADTG:

1.Submit a request within 90 days.

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

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