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onsemi MC74HC240ADTR2G-Q
- Part No.:
- MC74HC240ADTR2G-Q
- Manufacturer:
- onsemi
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MC74HC240ADTR2G-Q.pdf
- Description:
- IC BUFFER INVERT 6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,252
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Product details
Overview
MC74HC240ADTR2G-Q from onsemi is an octal 3-state inverting buffer/line driver with two active-low output enables, designed for memory address and clock distribution in automotive-grade systems. It operates from 2.0 V to 6.0 V, delivers ±7.8 mA output drive at 6.0 V, supports –55 °C to +125 °C operation, and is AEC-Q100 qualified for under-hood control modules.
For engineers reviewing the MC74HC240ADTR2G-Q datasheet, pinout, applications, or equivalent options, key selection criteria include its dual enable architecture, TSSOP-20 package footprint, 14 ns max propagation delay at 6.0 V, high-noise-immunity CMOS inputs, and automotive qualification status.
Technical Context
The MC74HC240ADTR2G-Q implements eight independent inverting buffers grouped into two 4-bit banks (A and B), each controlled by a dedicated active-low output enable (OE). Its silicon-gate CMOS process ensures compatibility with LSTTL and standard CMOS logic families when used with pull-up resistors.
Each output transitions between true inversion and high-impedance states based solely on its bank's OE signal-no internal latching or direction control is present. Propagation delays are asymmetric: tPLH/tPHL ≤ 14 ns and tPLZ/tPHZ ≤ 19 ns at VCC = 6.0 V and TA = 25 °C, enabling precise timing in synchronous bus interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 6.0 V - supports single-supply operation across 3.3 V and 5 V logic domains without level shifters. |
| Output Drive Strength | ±7.8 mA at VCC = 6.0 V - drives 15 LSTTL loads directly, eliminating need for external buffer stages. |
| Propagation Delay | 14 ns max (A→YA/B→YB) at 6.0 V - enables reliable operation in 35 MHz address/data strobe timing windows. |
| Operating Temperature | –55 °C to +125 °C - validated for engine control units, transmission controllers, and ADAS sensor hubs. |
| Input Leakage Current | ±1.0 μA max at 125 °C - ensures stable logic levels in low-power sleep modes without unintended toggling. |
| ESD Withstand | >2000 V HBM - meets automotive board-level ESD robustness requirements per ISO 10605. |
| Quiescent ICC | 160 μA max at 125 °C - minimizes standby current in always-on vehicle networks. |
Pinout & Package
TSSOP-20 package (Case 948E), 0.65 mm pitch, 6.5 mm × 4.4 mm body, 1.2 mm max height, lead-free (Pb-free) and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | Enable A / Enable B | Active-low enables for Bank A (YA1–YA4) and Bank B (YB1–YB4); independent control allows time-multiplexed bus sharing. |
| 2, 4, 6, 8 | A1–A4 Inputs | Inverted data inputs for Bank A; tied to microcontroller address lines or FPGA I/O banks requiring polarity inversion. |
| 11, 13, 15, 17 | B1–B4 Inputs | Inverted data inputs for Bank B; supports dual-bus architectures such as separate read/write paths or mirrored control signals. |
| 18, 16, 14, 12 | YA1–YA4 Outputs | Inverting outputs for Bank A; high-impedance when Enable A = high, enabling bidirectional bus arbitration. |
| 9, 7, 5, 3 | YB1–YB4 Outputs | Inverting outputs for Bank B; electrically isolated from YA outputs-no crosstalk between banks. |
| 10 | GND | Ground reference for all logic and power domains; requires low-inductance connection to PCB ground plane. |
| 20 | VCC | Positive supply input; decoupling capacitor (100 nF ceramic) required within 5 mm of pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-bit banks | Enables concurrent control of two separate buses (e.g., address vs. control) without inter-bank timing skew. |
| AEC-Q100 Grade 1 qualification | Validated for automotive applications requiring operation up to +125 °C ambient and PPAP compliance. |
| CMOS input compatibility | Accepts standard CMOS logic levels directly; LSTTL compatibility achieved with external pull-ups-no level-shifter needed. |
| High noise immunity | Typical noise margin > 1.0 V at 5 V supply-rejects coupled transients from ignition systems or motor drivers. |
| Low dynamic power consumption | CPD = 32 pF per channel-reduces switching current in high-frequency clock distribution networks. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Driving multiplexed sensor address lines in real-time combustion monitoring subsystems. IC Role / Device Role / Timing Role: Inverting buffer for 8-bit address bus between MCU and knock sensor array, with bank-selectable enable for dynamic channel allocation. Use Value: Dual-enable architecture reduces MCU GPIO usage by 50% versus discrete buffers; 14 ns delay ensures setup/hold timing closure at 33 MHz sampling clocks. | Use Scenario: Level-shifting and buffering camera pixel clock and sync signals in surround-view processing modules. IC Role / Device Role / Timing Role: Inverting line driver for 5 V camera interface signals routed to 3.3 V image signal processor, using Bank A for clock and Bank B for frame sync. Use Value: 2.0–6.0 V operation eliminates external level translators; AEC-Q100 qualification guarantees reliability in vibration-prone mounting locations. |
| Transmission Control Module (TCM) | Body Control Module (BCM) |
Use Scenario: Isolating diagnostic communication lines between powertrain gateway and solenoid driver ICs during firmware updates. IC Role / Device Role / Timing Role: 3-state inverting repeater for CAN FD transceiver control signals, with Enable A managing update mode and Enable B managing normal operation. Use Value: High-impedance state prevents bus contention during reprogramming; ±7.8 mA drive sustains signal integrity over 15 cm PCB traces. | Use Scenario: Buffering door lock actuator command signals from microcontroller to high-side driver ICs in centralized body electronics. IC Role / Device Role / Timing Role: Inverting line receiver for open-drain microcontroller outputs driving N-channel gate drivers, with polarity correction built-in. Use Value: Eliminates external inverters in 8-channel lock/unlock circuits-reducing BOM count by 8 components and saving 24 mm² PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC240QPWRQ1 | TI AEC-Q100 Grade 1 part in TSSOP-20; identical pinout but higher ICC (200 μA max at 125 °C) and slower tPLH (18 ns at 6 V). | Same dual-bank enable architecture and voltage range; slightly lower noise margin (0.9 V typical at 5 V). | Preferred where TI ecosystem alignment or existing TI design reuse is prioritized over minimal propagation delay. |
| 74HC240D,653 | Nexperia TSSOP-20 variant; no AEC-Q100 qualification; wider operating temp (–40 to +125 °C); same AC specs except tPLZ/tPHZ = 22 ns. | Limited to non-safety-critical cabin modules; lacks PPAP documentation support and automotive traceability. | Select for cost-sensitive infotainment or lighting control where full automotive qualification is not mandated. |
Compared with SN74HC240QPWRQ1 and 74HC240D,653, the MC74HC240ADTR2G-Q offers the lowest propagation delay (14 ns), tightest thermal specification (–55 °C start), and full PPAP support-making it optimal for safety-critical powertrain and chassis control designs requiring deterministic timing and audit-ready compliance.
Availability
MC74HC240ADTR2G-Q is available at Aetrix Electronics and suitable for engine control units, ADAS camera interfaces, transmission control modules, and body control modules requiring stable component supply across extended temperature ranges and automotive lifecycle commitments.
Supply support for MC74HC240ADTR2G-Q 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MC74HC240ADTR2G-Q belongs to onsemi's HC logic family-designed specifically for automotive and industrial systems demanding high noise immunity, wide voltage operation, and AEC-Q100 qualification without performance trade-offs.
FAQ
What is the maximum operating temperature for the MC74HC240ADTR2G-Q?
The MC74HC240ADTR2G-Q is rated for operation from –55 °C to +125 °C ambient temperature, meeting AEC-Q100 Grade 1 requirements. This specification is validated across all electrical parameters including propagation delay, output drive, and leakage current-ensuring reliable function in under-hood environments where ambient temperatures exceed 105 °C during peak load conditions. The MC74HC240ADTR2G-Q maintains full functionality without derating across this full range.
Does the MC74HC240ADTR2G-Q support 3.3 V logic systems?
Yes, the MC74HC240ADTR2G-Q operates reliably at 3.3 V supply (within its 2.0–6.0 V range) and interfaces directly with 3.3 V CMOS outputs. Its VIH threshold is 2.1 V min at VCC = 3.0 V, providing 1.2 V noise margin above typical 3.3 V logic high (2.4 V). Input leakage remains below ±1.0 μA at 125 °C, preventing false triggering in low-power 3.3 V microcontroller interfaces. The MC74HC240ADTR2G-Q requires no level-shifting circuitry in mixed-voltage systems.
How does the dual-output-enable architecture of the MC74HC240ADTR2G-Q improve system design?
The MC74HC240ADTR2G-Q features two independent active-low output enables (Enable A and Enable B), allowing separate control of its two 4-bit banks. This enables time-multiplexed bus sharing-e.g., using Bank A for address lines and Bank B for control signals-without adding external logic. It reduces MCU GPIO count by half versus single-enable alternatives and eliminates timing skew between banks. The MC74HC240ADTR2G-Q thus simplifies routing and improves signal integrity in space-constrained automotive ECUs.
Is the MC74HC240ADTR2G-Q pin-compatible with legacy LS240 devices?
Yes, the MC74HC240ADTR2G-Q is pinout-identical to the 74LS240, as confirmed in the onsemi datasheet. All 20 pins-including VCC (20), GND (10), input groups (A1–A4, B1–B4), output groups (YA1–YA4, YB1–YB4), and enables (1, 19)-match LS240 assignments. However, the MC74HC240ADTR2G-Q uses CMOS technology with higher noise immunity, lower power, and wider voltage range-requiring no changes to PCB layout but enabling direct upgrade from bipolar TTL in automotive retrofits.
What packaging and compliance certifications apply to the MC74HC240ADTR2G-Q?
The MC74HC240ADTR2G-Q is supplied in a Pb-free, RoHS-compliant TSSOP-20 package (Case 948E) with moisture sensitivity level (MSL) 1. It carries AEC-Q100 qualification for automotive use and PPAP documentation capability. The "–Q" suffix denotes unique site and control change requirements, ensuring full traceability for Tier 1 suppliers. The MC74HC240ADTR2G-Q also meets UL 94 V-0 flammability rating and has oxygen index 28–34, supporting compliance with automotive interior material standards.
MC74HC240ADTR2G-Q Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- HC
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- 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:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
MC74HC240ADTR2G-Q FAQ
1.How can I place an order for MC74HC240ADTR2G-Q through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74HC240ADTR2G-Q 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 MC74HC240ADTR2G-Q reliable?
The price and inventory of MC74HC240ADTR2G-Q are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74HC240ADTR2G-Q is usually 5 days.
3.What payment methods are accepted for MC74HC240ADTR2G-Q?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74HC240ADTR2G-Q transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74HC240ADTR2G-Q?
MC74HC240ADTR2G-Q orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74HC240ADTR2G-Q 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 MC74HC240ADTR2G-Q?
For technical support, including MC74HC240ADTR2G-Q datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74HC240ADTR2G-Q requirements.
6.How does Aetrix verify that MC74HC240ADTR2G-Q is sourced from the original manufacturer or authorized distributors?
All MC74HC240ADTR2G-Q 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 MC74HC240ADTR2G-Q meets industry standards.
7.What is the process for return or replacement of MC74HC240ADTR2G-Q?
All MC74HC240ADTR2G-Q units undergo pre-shipment inspection (PSI). If there is an issue with MC74HC240ADTR2G-Q, 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 MC74HC240ADTR2G-Q part is unused and in its original packaging.
Return procedure for MC74HC240ADTR2G-Q:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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