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

onsemi 74HCT08DTR2G

Name: 74HCT08DTR2G
Brand: onsemi
SKU: 74HCT08DTR2G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74HCT08DTR2G

Manufacturer:: onsemi

Category:: Gates and Inverters

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

Datasheet:: 74HCT08DTR2G.pdf

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

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Product details

Overview

74HCT08DTR2G from onsemi is a quad 2-input AND gate with TTL-compatible inputs, fabricated in high-performance silicon-gate CMOS. It operates from 4.5 V to 5.5 V, delivers ±4 mA output drive at V_CC = 4.5 V, exhibits 22 ns max propagation delay at 125°C, and supports industrial temperature range (−55°C to +125°C). It is used in digital logic interfacing between LSTTL and CMOS systems.

For engineers reviewing the 74HCT08DTR2G datasheet, pinout, applications, or equivalent options, key selection criteria include its TTL-compatible input thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.0 V), guaranteed 4 mA sink/source capability, TSSOP-14 Pb-free package, JEDEC Std. 7A compliance, and 10 LSTTL load drive rating.

Technical Context

The 74HCT08DTR2G implements four independent AND gates in a single monolithic CMOS IC, with input thresholds matched to LSTTL levels for seamless interfacing. Its architecture ensures rail-to-rail output swing (V_OH ≥ 4.4 V, VOL ≤ 0.4 V at 4 mA) and low static current (I_CC ≤ 40 µA at 125°C).

It features high noise immunity inherent to CMOS, ESD protection rated at 2000 V HBM, and operates reliably across −55°C to +125°C without derating below 65°C. Input capacitance is limited to 10 pF, supporting clean signal integrity in high-speed digital control paths.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Function	Quad 2-input AND gate (Y = A·B per channel)
Supply Voltage	4.5 V to 5.5 V - compatible with standard 5 V TTL/CMOS rails
Output Drive	±4 mA at V_CC = 4.5 V - drives 10 LSTTL loads directly
Propagation Delay	22 ns max (A/B to Y, CL = 50 pF, TA = 125°C) - suitable for <45 MHz toggle rates
Input Thresholds	V_IL ≤ 0.8 V, V_IH ≥ 2.0 V - ensures reliable recognition of LSTTL logic levels
Operating Temp	−55°C to +125°C - qualified for extended industrial and automotive under-hood use
ESD Rating	HBM 2000 V - robust handling in automated assembly and field service

Pinout & Package

TSSOP-14 package (Case 948G), 4.9 mm × 4.4 mm × 1.2 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/A2/B2/A3/B3/A4/B4)	Dedicated AND gate inputs; TTL-compatible thresholds enable direct connection to 74LS outputs
3, 6, 8, 11	Output (Y1/Y2/Y3/Y4)	CMOS push-pull outputs; capable of sourcing/sinking 4 mA while maintaining VOH ≥ 3.7 V / VOL ≤ 0.4 V
7	GND	Ground reference for all inputs, outputs, and internal circuitry; must be low-impedance
14	V_CC	Positive supply rail; decoupling capacitor (0.1 µF) required within 10 mm of this pin

Key Features

Feature	Design Value
LSTTL-compatible inputs	Enables direct replacement of 74LS08 without level-shifting or pull-up resistors
10 LSTTL load drive	Eliminates need for buffer stages when driving legacy TTL loads in mixed-technology systems
JEDEC Std. 7A compliance	Guarantees interoperability with industry-standard TTL and CMOS logic families
Low input current (±0.1 µA)	Minimizes loading on upstream drivers and reduces power budget impact in large fanout networks
Pb-free TSSOP-14 package	Meets RoHS Directive 2011/65/EU and supports lead-free reflow profiles (peak 260°C)

Applications

Industrial PLC I/O Expansion	Automotive Body Control Module
Use Scenario: Adding discrete logic gating for sensor enable signals in modular I/O racks. IC Role / Device Role / Timing Role: Quad AND gate enabling synchronized activation of multiple solenoid drivers based on master enable + channel select. Use Value: Reduces BOM count vs. discrete gates; TTL-compatible inputs interface directly with legacy 74LS-based controller outputs.	Use Scenario: Combining door lock status and ignition state to conditionally activate interior lighting. IC Role / Device Role / Timing Role: Logic-level gating of microcontroller GPIOs to generate safe, debounced control signals for LED drivers. Use Value: Eliminates software polling overhead; deterministic hardware response (<22 ns) ensures timing-critical safety interlocks.
Medical Diagnostic Equipment Timing	Test & Measurement Signal Conditioning
Use Scenario: Gating sample clock pulses only during valid ADC conversion windows. IC Role / Device Role / Timing Role: AND gate synchronizing system clock with analog front-end ready signal to prevent metastability. Use Value: Ensures zero-cycle clock glitches; 125°C rating supports convection-cooled enclosures near power supplies.	Use Scenario: Enabling data capture strobes only when both trigger condition and acquisition arm are asserted. IC Role / Device Role / Timing Role: Hardware-enforced logical conjunction of two independent event signals before latching. Use Value: Prevents false triggers in high-noise lab environments; 2000 V HBM ESD withstand protects against bench handling damage.

Industrial PLC I/O Expansion

Automotive Body Control Module

Use Scenario: Adding discrete logic gating for sensor enable signals in modular I/O racks.

IC Role / Device Role / Timing Role: Quad AND gate enabling synchronized activation of multiple solenoid drivers based on master enable + channel select.

Use Value: Reduces BOM count vs. discrete gates; TTL-compatible inputs interface directly with legacy 74LS-based controller outputs.

Use Scenario: Combining door lock status and ignition state to conditionally activate interior lighting.

IC Role / Device Role / Timing Role: Logic-level gating of microcontroller GPIOs to generate safe, debounced control signals for LED drivers.

Use Value: Eliminates software polling overhead; deterministic hardware response (<22 ns) ensures timing-critical safety interlocks.

Medical Diagnostic Equipment Timing

Test & Measurement Signal Conditioning

Use Scenario: Gating sample clock pulses only during valid ADC conversion windows.

IC Role / Device Role / Timing Role: AND gate synchronizing system clock with analog front-end ready signal to prevent metastability.

Use Value: Ensures zero-cycle clock glitches; 125°C rating supports convection-cooled enclosures near power supplies.

Use Scenario: Enabling data capture strobes only when both trigger condition and acquisition arm are asserted.

IC Role / Device Role / Timing Role: Hardware-enforced logical conjunction of two independent event signals before latching.

Use Value: Prevents false triggers in high-noise lab environments; 2000 V HBM ESD withstand protects against bench handling damage.

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
SN74HCT08PWR	TSSOP-14, identical logic function and DC specs; same V_CC, V_IH/V_IL, I_OH/I_OL; minor AC parameter variation (t_PLH = 23 ns max @ 125°C)	Same industrial temp range and LSTTL compatibility; TI's version uses different wafer process but meets identical JEDEC 7A requirements	Select when dual-sourcing is required or TI's distribution channels offer better lead time
MC74HCT08ADR2G	SOIC-14 package (Case 751A); otherwise identical electrical specs and pinout; slightly higher thermal resistance (500 mW vs. 450 mW TSSOP)	Preferred where board space allows larger footprint and hand-soldering or legacy reflow profiles are used	Choose for compatibility with existing SOIC footprints or where mechanical robustness outweighs size constraints

Compared with SN74HCT08PWR and MC74HCT08ADR2G, the 74HCT08DTR2G offers identical logic behavior and TTL interface compatibility in a smaller TSSOP-14 package with optimized thermal performance (450 mW rating), making it ideal for space-constrained industrial controls where board real estate and thermal management are critical.

Availability

74HCT08DTR2G is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, medical diagnostic equipment timing, and test & measurement signal conditioning requiring stable component supply and long-term lifecycle support.

Supply support for 74HCT08DTR2G 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 manufacturer specializing in energy-efficient power management, analog, logic, and sensor solutions for automotive, industrial, and cloud infrastructure markets.

The 74HCT08DTR2G belongs to the HCT logic family, designed specifically to bridge LSTTL and CMOS systems with TTL-compatible inputs, rail-to-rail outputs, and industrial-grade reliability across extended temperature ranges.

FAQ

What is the maximum operating temperature for the 74HCT08DTR2G?

The 74HCT08DTR2G is fully specified from −55°C to +125°C. Its DC and AC parameters-including propagation delay (22 ns max), output voltage levels (VOH ≥ 3.7 V, VOL ≤ 0.4 V at 4 mA), and quiescent current (ICC ≤ 40 µA)-are guaranteed across this full industrial temperature range, making it suitable for under-hood automotive and high-ambient industrial environments.

Is the 74HCT08DTR2G pin-compatible with the 74LS08?

Yes, the 74HCT08DTR2G is pin-compatible with the 74LS08. Both devices use the same 14-pin configuration (TSSOP-14 for 74HCT08DTR2G, SOIC-14 or PDIP-14 for 74LS08), with identical pin functions: inputs A1–B4 on pins 1,2,4,5,9,10,12,13; outputs Y1–Y4 on pins 3,6,8,11; VCC on pin 14; GND on pin 7. This enables drop-in replacement in existing designs.

Does the 74HCT08DTR2G require external pull-up resistors on inputs?

No, the 74HCT08DTR2G does not require external pull-up resistors on inputs. Its TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) allow direct connection to LSTTL outputs (e.g., 74LS00 series), and unused inputs must be tied to VCC or GND-no pull-ups needed. Internal input structure provides defined logic states without external biasing.

What is the output drive capability of the 74HCT08DTR2G at 5.0 V supply?

At VCC = 5.0 V, the 74HCT08DTR2G guarantees ±4.0 mA output drive per channel (IOH = −4.0 mA, IOL = +4.0 mA) while maintaining VOH ≥ 3.98 V and VOL ≤ 0.26 V. This corresponds to driving up to 10 LSTTL loads, satisfying the JEDEC Standard No. 7A requirement for TTL interface compatibility.

Can the 74HCT08DTR2G be used with a 3.3 V supply?

No, the 74HCT08DTR2G is not rated for 3.3 V operation. Its recommended operating voltage is strictly 4.5 V to 5.5 V. At 3.3 V, input thresholds (VIH ≥ 2.0 V) would still be met, but output drive, noise margins, and AC performance are not characterized or guaranteed-and ICC and propagation delay may deviate significantly outside spec.

74HCT08DTR2G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74HCT

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Logic Type:: AND Gate

Number of Circuits:: 4

Number of Inputs:: 2

Features:: -

Voltage - Supply:: 4.5V ~ 5.5V

Current - Quiescent (Max):: 2 µA

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

Input Logic Level - Low:: 0.8V

Input Logic Level - High:: 2V

Max Propagation Delay @ V, Max CL:: 15ns @ 4.5V, 50pF

Operating Temperature:: -55°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-TSSOP

74HCT08DTR2G FAQ

1.How can I place an order for 74HCT08DTR2G through Aetrix?

Please submit a Request for Quotation (RFQ) for 74HCT08DTR2G 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 74HCT08DTR2G reliable?

The price and inventory of 74HCT08DTR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT08DTR2G is usually 5 days.

3.What payment methods are accepted for 74HCT08DTR2G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT08DTR2G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74HCT08DTR2G?

74HCT08DTR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74HCT08DTR2G 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 74HCT08DTR2G?

For technical support, including 74HCT08DTR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT08DTR2G requirements.

6.How does Aetrix verify that 74HCT08DTR2G is sourced from the original manufacturer or authorized distributors?

All 74HCT08DTR2G 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 74HCT08DTR2G meets industry standards.

7.What is the process for return or replacement of 74HCT08DTR2G?

All 74HCT08DTR2G units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT08DTR2G, 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 74HCT08DTR2G part is unused and in its original packaging.

Return procedure for 74HCT08DTR2G:

1.Submit a request within 90 days.

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

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