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onsemi M74LCX16240DTR2G
- Part No.:
- M74LCX16240DTR2G
- Manufacturer:
- onsemi
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
M74LCX16240DTR2G.pdf
- Description:
- IC BUFFER INVERT 3.6V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
M74LCX16240DTR2G from onsemi is a low-voltage CMOS 16-bit inverting buffer with 3-state outputs, 5 V-tolerant I/O, and nibble-level output enable control. It operates from 2.3 V to 3.6 V, delivers ±24 mA output drive, supports live insertion, and is used for memory address driving and TTL-level bus interfacing in mixed-voltage systems.
For engineers reviewing the M74LCX16240DTR2G datasheet, pinout, applications, or equivalent options, key selection criteria include 5 V tolerance, 2.3–3.6 V supply compatibility, 16-bit nibble-controlled 3-state operation, propagation delay under 5.4 ns at 3.3 V, and TSSOP-48 package suitability for high-density PCB layouts.
Technical Context
The M74LCX16240DTR2G implements four independent 4-bit inverting buffers, each controlled by a dedicated OE input (OE1–OE4), enabling flexible partial-bus gating. Its 5.5 V absolute maximum input voltage rating allows safe interfacing with legacy 5 V TTL logic without level shifters.
Each output provides balanced ±24 mA sink/source capability at VCC ≥ 3.0 V, with near-zero static ICC (10 µA) across all logic states. The device features IOFF protection ensuring high-impedance outputs when VCC = 0 V, supporting hot-swap applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.3 V to 3.6 V - enables direct use in 2.5 V and 3.3 V systems without regulators |
| Input Voltage Range | −0.5 V to +5.5 V - guarantees safe 5 V TTL signal acceptance with no external clamping |
| Output Drive | ±24 mA at VCC ≥ 3.0 V - drives standard TTL loads and multiple LVTTL inputs |
| Propagation Delay | ≤ 5.4 ns at VCC = 3.3 V, CL = 50 pF - supports >100 MHz bus operation with timing margin |
| Quiescent Current | 10 µA max - minimizes standby power in battery-backed or low-power embedded systems |
| IOFF Leakage | 10 µA at VCC = 0 V - maintains bus isolation during power sequencing or hot-plug events |
| ESD Rating | HBM > 2000 V - meets industrial handling requirements without additional protection circuitry |
Pinout & Package
TSSOP-48 (Case 1201), Pb-free, RoHS-compliant surface-mount package with 0.5 mm pitch, 12.5 mm × 6.1 mm footprint, and exposed thermal pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OE1–OE4 | Output Enable Inputs | Active-low controls for four independent 4-bit nibbles; tying together enables full 16-bit operation |
| D0–D15 | Data Inputs | Inverting inputs - logic HIGH produces LOW output; TTL/LVTTL/LVCMOS compatible |
| O0–O15 | 3-State Outputs | Inverting buffered outputs with 5 V-tolerant structure; high-Z when corresponding OE is HIGH |
| VCC (Pins 7, 18, 30) | Power Supply | Single 2.3–3.6 V rail shared across all buffers; three pins reduce IR drop and noise coupling |
| GND (Pins 4, 10, 15, 21, 33, 44) | Ground | Six ground pins minimize ground bounce and improve AC noise immunity in high-speed switching |
Key Features
| Feature | Design Value |
|---|---|
| 5 V–tolerant I/O | Enables seamless interface between 3.3 V logic domains and legacy 5 V peripherals without level translators |
| Nibble-selectable 3-state control | Four OE inputs allow dynamic partitioning of 16-bit buses - e.g., isolate address vs. data segments |
| Live insertion support | IOFF and high-impedance state at VCC = 0 V permit safe board replacement in powered-backplane systems |
| Low dynamic switching noise | 20 pF power dissipation capacitance and balanced drive reduce simultaneous switching output (SSO) noise |
| Pb-free / RoHS compliance | Meets global environmental regulations and reflow soldering profiles up to 260 °C peak temperature |
Applications
| Memory Address Buffering | Backplane Bus Interface |
|---|---|
Use Scenario: Driving 16-bit address lines from a low-voltage microcontroller to SRAM or Flash memory operating at 5 V. IC Role / Device Role / Timing Role: Inverting 3-state buffer providing voltage translation, fanout expansion, and bus contention control. Use Value: Eliminates need for discrete level shifters while maintaining <5.4 ns propagation delay for synchronous memory access timing. | Use Scenario: Interfacing a 3.3 V FPGA I/O bank to a 5 V TTL backplane carrying control/status signals. IC Role / Device Role / Timing Role: Bidirectional-capable (via OE control) voltage-tolerant buffer isolating logic domains and suppressing ground bounce. Use Value: Six GND pins and 24 mA drive ensure signal integrity across 20 cm backplane traces at 25 MHz clock rates. |
| Hot-Swappable Module Control | Industrial PLC I/O Expansion |
Use Scenario: Enabling/disabling communication lines to a field-replaceable module in a powered rack system. IC Role / Device Role / Timing Role: Nibble-gated buffer asserting high-Z state during insertion/removal to prevent bus conflicts. Use Value: IOFF specification guarantees outputs remain high-Z even when VCC is disconnected - critical for hot-swap safety. | Use Scenario: Expanding digital input/output capacity of a 24 V PLC controller using 3.3 V logic and 5 V sensor/actuator interfaces. IC Role / Device Role / Timing Role: Level-shifting buffer translating between isolated 3.3 V logic and non-isolated 5 V field-side signals. Use Value: 2000 V HBM ESD rating withstands industrial EMI environments; 10 µA quiescent current reduces heat in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16240ADGGR | Same 16-bit inverting 3-state function, but only 3.6 V max VCC and 3.6 V max VI - no 5 V tolerance | Requires external clamping or level shifting for 5 V inputs; unsuitable for direct 5 V TTL interfacing | Select only if system uses exclusively 3.3 V or lower logic and no 5 V signals are present |
| 74ALVC16240PW | Higher speed (tPD ≤ 3.5 ns), same 5 V tolerance, but rated only down to 2.7 V VCC - not specified below 2.7 V | Cannot operate at 2.5 V supply; incompatible with 2.3–2.5 V ultra-low-power designs | Prefer when speed is critical and supply is stable ≥2.7 V; avoid for battery-powered 2.5 V systems |
Compared with SN74LVC16240ADGGR and 74ALVC16240PW, the M74LCX16240DTR2G uniquely supports full 5 V tolerance *and* operation down to 2.3 V, making it the only option for mixed-voltage bus buffering where both legacy compatibility and low-voltage efficiency are required.
Availability
M74LCX16240DTR2G is available at Aetrix Electronics and suitable for memory subsystem design, industrial backplane interfacing, and hot-swappable module control requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for M74LCX16240DTR2G 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, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The MC74LCX family targets low-voltage, high-speed logic interfacing with 5 V tolerance - designed specifically for bridging next-generation sub-3.3 V processors to legacy 5 V infrastructure in cost-sensitive industrial and communications equipment.
FAQ
What is the minimum supply voltage for reliable operation of the M74LCX16240DTR2G?
The M74LCX16240DTR2G is fully specified from 2.3 V to 3.6 V. At 2.3 V, it guarantees −8 mA output source/sink capability and meets all DC and AC timing specifications per the datasheet. Operation below 2.3 V is not characterized and may result in undefined logic behavior or timing violations in the M74LCX16240DTR2G.
Can the M74LCX16240DTR2G safely interface with 5 V microcontrollers without external components?
Yes - the M74LCX16240DTR2G accepts input voltages up to 5.5 V regardless of VCC, and its outputs tolerate 5 V when in high-impedance state. This allows direct connection to 5 V MCU GPIOs or peripherals without resistors, diodes, or level shifters, preserving signal integrity and reducing BOM count for the M74LCX16240DTR2G.
How does the nibble-control architecture of the M74LCX16240DTR2G improve system design flexibility?
The M74LCX16240DTR2G provides four independent OE inputs (OE1–OE4), each controlling a 4-bit segment. This allows selective gating of address/data nibbles, dynamic bus partitioning, or staggered enable timing - e.g., enabling upper/lower memory banks separately. That architectural feature is intrinsic to the M74LCX16240DTR2G and not available in standard 16-bit buffers.
Does the M74LCX16240DTR2G support hot-swap applications, and what feature enables this?
Yes - the M74LCX16240DTR2G supports hot-swap via its IOFF specification: when VCC = 0 V, all outputs remain in high-impedance state even with 5.5 V applied to inputs. This prevents back-driving powered subsystems during insertion, a core requirement for modular systems using the M74LCX16240DTR2G in backplane or carrier-board roles.
What is the maximum capacitive load the M74LCX16240DTR2G can drive while maintaining guaranteed timing performance?
The M74LCX16240DTR2G AC specifications are guaranteed with CL = 50 pF at VCC = 3.3 V and CL = 30 pF at VCC = 2.5 V. Driving heavier loads increases propagation delay and output transition time; for example, at 100 pF and 3.3 V, tPLH/tPHL may exceed 8 ns. Designers should verify timing margins in their actual layout when using the M74LCX16240DTR2G with >50 pF loads.
M74LCX16240DTR2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74LCX
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Inverting
- Number of Elements:
- 4
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 2V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
M74LCX16240DTR2G FAQ
1.How can I place an order for M74LCX16240DTR2G through Aetrix?
Please submit a Request for Quotation (RFQ) for M74LCX16240DTR2G 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 M74LCX16240DTR2G reliable?
The price and inventory of M74LCX16240DTR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M74LCX16240DTR2G is usually 5 days.
3.What payment methods are accepted for M74LCX16240DTR2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M74LCX16240DTR2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M74LCX16240DTR2G?
M74LCX16240DTR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M74LCX16240DTR2G 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 M74LCX16240DTR2G?
For technical support, including M74LCX16240DTR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M74LCX16240DTR2G requirements.
6.How does Aetrix verify that M74LCX16240DTR2G is sourced from the original manufacturer or authorized distributors?
All M74LCX16240DTR2G 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 M74LCX16240DTR2G meets industry standards.
7.What is the process for return or replacement of M74LCX16240DTR2G?
All M74LCX16240DTR2G units undergo pre-shipment inspection (PSI). If there is an issue with M74LCX16240DTR2G, 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 M74LCX16240DTR2G part is unused and in its original packaging.
Return procedure for M74LCX16240DTR2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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