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onsemi MC74LCX16244DTR2
- Part No.:
- MC74LCX16244DTR2
- Manufacturer:
- onsemi
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
MC74LCX16244DTR2.pdf
- Description:
- IC BUFF TRI-ST 16BIT LV 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:230,258
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Product details
Overview
MC74LCX16244DTR2 from onsemi is a low-voltage CMOS 16-bit non-inverting buffer with 5 V-tolerant inputs/outputs, 4.5 ns max propagation delay at VCC = 3.0 V, ±24 mA output drive, and nibble-level 3-state control via four independent OE inputs. It serves as a high-speed bus interface buffer in memory address driving and TTL-level data path isolation.
For engineers reviewing the MC74LCX16244DTR2 datasheet, pinout, applications, or equivalent options, key selection criteria include 1.65–5.5 V supply flexibility, 5.0 V tolerance for mixed-voltage system interfacing, IOFF-enabled live insertion support, and TSSOP-48 package compatibility with high-density PCB layouts.
Technical Context
The MC74LCX16244DTR2 implements four independent 4-bit nibble groups (D0–D3/O0–O3, D4–D7/O4–O7, D8–D11/O8–O11, D12–D15/O12–O15), each controlled by its own Output Enable (OE1–OE4) input. Outputs enter high-impedance state when respective OE is HIGH, enabling selective bus segment isolation without affecting other nibbles.
Its 5.0 V-tolerant I/O architecture allows safe interfacing with legacy 5 V TTL logic while operating from 1.65–5.5 V supplies. The device features IOFF protection (high-impedance outputs when VCC = 0 V), LVTTL/LVCMOS compatibility, and <20 µA quiescent ICC across all logic states - critical for low-power embedded bus buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.65 V to 5.5 V - supports mixed-voltage system integration and battery-backed operation down to 1.65 V. |
| Max Propagation Delay | 4.5 ns @ VCC = 3.0 V - enables use in high-speed address/data buses up to ~220 MHz effective toggle rate. |
| Output Drive Strength | ±24 mA @ VCC = 3.0 V - sufficient to drive 50 Ω transmission lines or fan-out to ≥10 LVTTL loads. |
| I/O Voltage Tolerance | 5.5 V absolute max input/output voltage - permits direct connection to 5 V logic without level shifters. |
| Quiescent Supply Current | <20 µA in all three logic states - minimizes standby power in always-on bus interfaces and portable systems. |
| IOFF Protection | Outputs remain high-Z when VCC = 0 V - enables hot-plug capability and prevents back-driving during power sequencing. |
| ESD Rating (HBM) | >2000 V - meets industrial-grade robustness requirements for board-level handling and field deployment. |
Pinout & Package
TSSOP-48 package (Case 1201), 0.5 mm pitch, 12.5 mm × 6.1 mm footprint, lead-free (Pb-Free) and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OE1–OE4 | Nibble Output Enable Inputs | Active-Low control per 4-bit group; tying all four enables full 16-bit buffer operation. |
| D0–D15 | Buffer Inputs | 16 single-ended digital inputs; 5 V tolerant, high-impedance TTL-compatible. |
| O0–O15 | Buffer Outputs | 16 non-inverting 3-state outputs; ±24 mA drive, 5 V tolerant, low capacitive loading (8 pF typical). |
| VCC (Pins 7, 18, 30, 42) | Power Supply | Four dedicated VCC pins reduce IR drop and improve noise immunity in high-speed switching. |
| GND (Pins 4, 10, 15, 21, 28, 34, 39, 45) | Ground Reference | Eight GND pins provide low-inductance return paths, critical for signal integrity at sub-5 ns edge rates. |
Key Features
| Feature | Design Value |
|---|---|
| Live Insertion Support | IOFF specification guarantees high-impedance outputs during power-off, enabling hot-swap in modular backplanes. |
| Low Dynamic Power | 20 pF CPD and <20 µA ICC minimize switching and static power - ideal for battery-powered bus extenders. |
| Nibble-Level Control | Four independent OE inputs allow granular bus segmentation, reducing contention and EMI in multi-drop systems. |
| 5 V-Tolerant I/O | Eliminates external level translators when interfacing with 5 V microcontrollers, FPGAs, or legacy peripherals. |
| Latchup Immunity | >100 mA latchup current rating ensures robustness against transient overvoltage and ground bounce events. |
Applications
| Memory Address Buffering | Industrial PLC Backplane Interface |
|---|---|
|
Use Scenario: Driving 16-bit address lines from a low-voltage MCU to multiple SRAM/Flash devices sharing a common data bus. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer isolating MCU address outputs; nibble control enables dynamic bank selection. Use Value: 4.5 ns tPD ensures setup/hold timing margins are maintained at 50 MHz bus clock; 5 V tolerance accommodates 5 V memory parts. |
Use Scenario: Isolating CPU-side control signals from field I/O modules in a modular programmable logic controller rack. IC Role / Device Role / Timing Role: Bus transceiver buffer with independent nibble enables, supporting hot-swappable I/O card insertion/removal. Use Value: IOFF protection prevents back-driving during module replacement; ±24 mA drive handles long traces and multiple connectors. |
| Automotive Body Control Module | Test Equipment Signal Conditioning |
|
Use Scenario: Level-shifting and buffering sensor interface signals between 3.3 V microcontroller and 5 V analog front-end ICs. IC Role / Device Role / Timing Role: Voltage-tolerant buffer ensuring signal integrity across mixed-supply domains in ECU subsystems. Use Value: 5.5 V absolute max VIN/VOUT eliminates need for discrete clamping diodes; −55 °C to +125 °C operation meets AEC-Q100 stress requirements. |
Use Scenario: Driving calibrated test patterns from a pattern generator into multiple DUT inputs simultaneously under varying load conditions. IC Role / Device Role / Timing Role: High-fanout, low-skew buffer (≤1.0 ns skew) delivering synchronized stimulus to parallel DUT channels. Use Value: 1.0 ns max output-to-output skew ensures deterministic timing alignment; 8 pF COUT minimizes signal distortion on 50 Ω paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit non-inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16244ADGGR | 3.3 V only (1.65–3.6 V), no 5 V tolerance; 3.7 ns tPD @ 3.3 V; identical TSSOP-48 pinout. | Not suitable for 5 V legacy interface; better for pure 3.3 V systems requiring lower tPD. | Select when system operates exclusively at ≤3.6 V and maximum speed is prioritized over voltage flexibility. |
| 74ALVC16244PW,118 | 1.65–3.6 V range; 3.5 ns tPD @ 3.3 V; 5 V tolerant inputs only (not outputs); SO-48 package. | Requires external clamping for 5 V output loads; larger SO-48 footprint limits high-density routing. | Choose when cost-sensitive industrial designs accept SOIC packaging and partial 5 V tolerance suffices. |
Compared with SN74LVC16244ADGGR and 74ALVC16244PW,118, the MC74LCX16244DTR2 uniquely combines full 5 V I/O tolerance, 1.65–5.5 V supply range, and TSSOP-48 density - making it the only option for hot-pluggable, mixed-voltage bus expansion where both input and output sides must withstand 5 V signals.
Availability
MC74LCX16244DTR2 is available at Aetrix Electronics and suitable for memory address driving, industrial PLC backplane interfaces, and automotive body control modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MC74LCX16244DTR2 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 specializing in energy-efficient power management, analog, logic, and sensing solutions for automotive, industrial, and cloud infrastructure markets.
The MC74LCX16244DTR2 belongs to the LCX low-voltage logic family, designed specifically for high-speed, low-power bus interface applications in mixed-voltage embedded systems requiring robust 5 V tolerance and live-insertion capability.
FAQ
What is the maximum operating temperature range for the MC74LCX16244DTR2?
The MC74LCX16244DTR2 is rated for operation from −55 °C to +125 °C, meeting extended industrial and automotive under-hood temperature requirements. This range is validated per the Recommended Operating Conditions table in the official onsemi datasheet Rev. 15, with full DC and AC specifications guaranteed across the entire span.
Does the MC74LCX16244DTR2 support hot-plug or live-insertion applications?
Yes, the MC74LCX16244DTR2 supports live insertion via its IOFF specification: when VCC = 0 V, all outputs remain in a high-impedance state regardless of input voltage, preventing back-driving of powered circuitry. This feature is explicitly documented in the Features section and confirmed in the DC Electrical Characteristics table.
Can the MC74LCX16244DTR2 be used with a 5 V microcontroller driving its inputs while operating at 2.5 V VCC?
Yes - the MC74LCX16244DTR2 accepts input voltages up to 5.5 V independent of VCC, enabling direct connection to 5 V logic even when powered at 2.5 V. This 5 V-tolerant behavior is specified in the Absolute Maximum Ratings and Recommended Operating Conditions tables, with VIH/VIL thresholds scaled accordingly.
How many output enable (OE) inputs does the MC74LCX16244DTR2 have, and how are they assigned?
The MC74LCX16244DTR2 has four independent Output Enable inputs: OE1 controls outputs O0–O3, OE2 controls O4–O7, OE3 controls O8–O11, and OE4 controls O12–O15. Each OE is active-Low, and all can be tied together for unified 16-bit control - a configuration verified in the Logic Diagram and Truth Table of the datasheet.
What is the typical output capacitance (COUT) of the MC74LCX16244DTR2, and why does it matter?
The MC74LCX16244DTR2 has a typical output capacitance (COUT) of 8 pF, measured at VCC = 3.3 V. This low value minimizes signal rise/fall time degradation and reduces reflections on controlled-impedance traces - critical for maintaining signal integrity in high-speed bus applications above 50 MHz.
MC74LCX16244DTR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74LCX
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 4
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- 8mA, 8mA
- Voltage - Supply:
- 2V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
MC74LCX16244DTR2 FAQ
1.How can I place an order for MC74LCX16244DTR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74LCX16244DTR2 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 MC74LCX16244DTR2 reliable?
The price and inventory of MC74LCX16244DTR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74LCX16244DTR2 is usually 5 days.
3.What payment methods are accepted for MC74LCX16244DTR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74LCX16244DTR2 transactions.
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4.How is shipping managed for MC74LCX16244DTR2?
MC74LCX16244DTR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74LCX16244DTR2 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 MC74LCX16244DTR2?
For technical support, including MC74LCX16244DTR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74LCX16244DTR2 requirements.
6.How does Aetrix verify that MC74LCX16244DTR2 is sourced from the original manufacturer or authorized distributors?
All MC74LCX16244DTR2 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 MC74LCX16244DTR2 meets industry standards.
7.What is the process for return or replacement of MC74LCX16244DTR2?
All MC74LCX16244DTR2 units undergo pre-shipment inspection (PSI). If there is an issue with MC74LCX16244DTR2, 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 MC74LCX16244DTR2 part is unused and in its original packaging.
Return procedure for MC74LCX16244DTR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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