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onsemi MC74LCX16244DTG
- Part No.:
- MC74LCX16244DTG
- Manufacturer:
- onsemi
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
MC74LCX16244DTG.pdf
- Description:
- IC BUF NON-INVERT 3.6V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,207
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Product details
Overview
MC74LCX16244DTG 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 driver in memory address buffering and TTL-level data bus interfacing.
For engineers reviewing the MC74LCX16244DTG 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 MC74LCX16244DTG implements four independent 4-bit nibble groups, each controlled by its own Output Enable (OE1–OE4) input; enabling/disabling is asynchronous and edge-independent. Each group contains four non-inverting buffers with rail-to-rail 5.0 V-tolerant I/O, supporting bidirectional voltage translation between 1.65 V and 5.0 V logic domains without level shifters.
Its IOFF specification guarantees high-impedance outputs when VCC = 0 V, enabling safe hot-plug operation. The device exhibits near-zero static ICC (<20 µA in all logic states) and latchup immunity exceeding 100 mA, meeting stringent industrial reliability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.65 V to 5.5 V - enables direct interface across LVTTL, LVCMOS, and 5 V TTL systems without external level translation |
| Max Propagation Delay | 4.5 ns @ VCC = 3.0 V - supports >200 MHz bus operation in high-speed memory and peripheral addressing |
| Output Drive Strength | ±24 mA @ VCC = 3.0 V - drives 15 pF loads with <1 ns rise/fall skew, reducing signal integrity margin loss |
| Input/Output Voltage Tolerance | 5.5 V absolute max - allows safe connection to legacy 5 V drivers and receivers while operating at 1.8 V or 2.5 V core |
| IOFF Leakage | 10 µA max @ VI/VO = 5.5 V, VCC = 0 V - prevents back-powering and ensures true isolation during power sequencing |
| ESD Rating | >2000 V HBM - meets IEC 61000-4-2 Level 2 for board-level robustness in industrial environments |
Pinout & Package
TSSOP-48 (Case 1201), 0.5 mm pitch, Pb-free, RoHS-compliant surface-mount package with exposed thermal pad not present; 12.5 mm × 6.1 mm footprint optimized for automated assembly and thermal dissipation in dense layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OE1–OE4 (Pins 1, 47, 25, 24) | Nibble Output Enable Inputs | Active-Low control per 4-bit group; tying all four enables full 16-bit operation; supports partial bus gating |
| D0–D15 (Pins 2–3, 5–6, 8–17, 19–23, 26–27, 29–30, 32–33, 35–36, 38–39, 41–42, 44–46) | Data Inputs | High-impedance TTL-compatible inputs reduce loading on upstream drivers; accept 0–5.5 V signals regardless of VCC |
| O0–O15 (Pins 2–3, 5–6, 8–17, 19–23, 26–27, 29–30, 32–33, 35–36, 38–39, 41–42, 44–46) | Buffered Outputs | 5 V-tolerant 3-state outputs with balanced ±24 mA drive; sink/source symmetry minimizes ground bounce |
| VCC (Pins 7, 41, 18, 31) | Power Supply | Four dedicated VCC pins distribute supply current and reduce IR drop; decoupling required per pair |
| GND (Pins 4, 10, 15, 21, 28, 34, 37, 45) | Ground Return | Eight GND pins provide low-inductance return paths; essential for maintaining <100 ps output skew across all 16 bits |
Key Features
| Feature | Design Value |
|---|---|
| Live Insertion Support | IOFF specification ensures outputs remain high-Z during power-up/down sequencing, preventing bus contention in hot-swap backplanes |
| Low Dynamic Power | CPD = 20 pF enables sub-1 mW no-load power at 10 MHz (VCC = 3.3 V), critical for battery-backed memory subsystems |
| Input Threshold Flexibility | VIH/VIL thresholds scale with VCC (e.g., 0.65×VCC min VIH at 1.65 V) - maintains noise margin across 1.65–5.5 V supply range |
| Output Skew Control | tOSHL/tOSLH ≤ 1.0 ns @ VCC ≥ 3.0 V - ensures simultaneous switching of grouped outputs for clean address/data strobing |
| Robust ESD Protection | HBM >2000 V plus latchup immunity >100 mA - eliminates need for external TVS diodes in industrial control I/O modules |
Applications
| Memory Address Buffering | Industrial Bus Transceiver |
|---|---|
Use Scenario: Driving 16-bit address lines from a low-voltage microcontroller to SRAM or Flash memory operating at 3.3 V or 5 V. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer providing level-shifted, slew-controlled address propagation with minimal skew. Use Value: Enables direct interface between 1.8 V SoC and 5 V memory without discrete level shifters, reducing BOM count and layout area. |
Use Scenario: Isolating and driving parallel control/data buses between PLC CPU and I/O expansion modules. IC Role / Device Role / Timing Role: Nibble-gated bus driver with independent OE control per 4-bit segment for selective module enable/disable. Use Value: Supports hot-swap capability via IOFF and reduces ground bounce through distributed GND pins and balanced drive strength. |
| Automotive Body Control Module | Test Equipment Signal Conditioning |
Use Scenario: Interfacing 3.3 V CAN controller peripherals with 5 V sensor interface ICs in body electronics ECUs. IC Role / Device Role / Timing Role: Voltage-tolerant buffer isolating mixed-supply domains while maintaining timing-critical address/data integrity. Use Value: Eliminates risk of overvoltage damage during transients and ensures reliable operation across automotive temperature range (−40 °C to +125 °C). |
Use Scenario: Conditioning digital stimulus/response signals in ATE systems where DUT I/O voltages vary between 1.8 V and 5 V. IC Role / Device Role / Timing Role: Precision 16-bit buffer with sub-5 ns delay and <1 ns skew for synchronized multi-channel pattern generation. Use Value: Maintains signal fidelity across voltage domains and enables deterministic timing alignment for high-speed functional test vectors. |
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 | Lower max VCC (3.6 V), no 5 V tolerance; 3.5 ns tpd @ 3.3 V; IOFF not specified | Restricted to 3.3 V-only systems; unsuitable for 5 V legacy interface or hot-swap | Select only if design uses exclusively 3.3 V logic and does not require live insertion support |
| 74ALVC16244PW,118 | Same 1.65–3.6 V range; 5 V-tolerant I/O confirmed; 3.7 ns tpd @ 3.3 V; IOFF supported | Compatible pinout but different OE pin assignment (OE1/OE2 per 8-bit group vs. nibble); requires layout review | Valid alternative if OE grouping aligns with system architecture; verify OE mapping against existing firmware control logic |
Compared with SN74LVC16244ADGGR and 74ALVC16244PW,118, the MC74LCX16244DTG uniquely combines full 5.5 V I/O tolerance, nibble-level OE granularity, and guaranteed IOFF behavior - making it the only option for mixed-voltage hot-swap bus architectures requiring per-4-bit control.
Availability
MC74LCX16244DTG is available at Aetrix Electronics and suitable for memory address driving, industrial bus transceivers, automotive body control modules, and ATE signal conditioning requiring stable component supply and long-term industrial lifecycle support.
Supply support for MC74LCX16244DTG 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 MC74LCX16244DTG belongs to onsemi's LCX low-voltage logic family, engineered for high-speed, low-power, mixed-voltage interfacing in space-constrained industrial and automotive control systems.
FAQ
What is the maximum supply voltage rating for the MC74LCX16244DTG?
The MC74LCX16244DTG has an absolute maximum DC supply voltage (VCC) rating of +6.5 V, though recommended operation is limited to 1.65 V to 5.5 V. Exceeding 5.5 V may compromise reliability or violate JEDEC stress limits, even if functionality appears intact. Always observe the Recommended Operating Conditions table in the official onsemi datasheet for sustained operation.
Does the MC74LCX16244DTG support hot-plug insertion into a live 5 V bus?
Yes, the MC74LCX16244DTG supports live insertion due to its IOFF specification: when VCC = 0 V, all outputs remain in high-impedance state with leakage ≤10 µA even if 5.5 V is applied to inputs or outputs. This prevents back-powering and bus contention - a key requirement verified in onsemi's datasheet Section "DC ELECTRICAL CHARACTERISTICS" under IOFF parameter.
How many independent output enable controls does the MC74LCX16244DTG have?
The MC74LCX16244DTG has four independent Output Enable inputs - OE1, OE2, OE3, and OE4 - each controlling a separate 4-bit nibble (D0–D3/O0–O3, D4–D7/O4–O7, D8–D11/O8–O11, D12–D15/O12–O15). This nibble-level granularity enables partial bus gating, unlike 8-bit or full-16-bit enable architectures found in alternatives.
What is the typical output skew between any two outputs of the MC74LCX16244DTG?
The MC74LCX16244DTG specifies maximum output-to-output skew (tOSHL/tOSLH) of 1.0 ns at VCC ≥ 3.0 V, measured between any two outputs switching in the same direction. This tight skew ensures synchronous address/data transitions critical for high-speed memory access and parallel bus timing margins, as confirmed in the AC Electrical Characteristics table on page 5 of the datasheet.
Is the MC74LCX16244DTG pin-compatible with the SN74LVC16244A?
No, the MC74LCX16244DTG is not pin-compatible with the SN74LVC16244A. While both are 48-pin TSSOP 16-bit buffers, their OE pin assignments differ: MC74LCX16244DTG uses four nibble-OE pins (OE1–OE4 at Pins 1, 47, 25, 24), whereas SN74LVC16244A uses two 8-bit OE pins (1OE, 2OE). PCB layout and firmware control logic must be redesigned for substitution.
MC74LCX16244DTG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74LCX
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-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
MC74LCX16244DTG FAQ
1.How can I place an order for MC74LCX16244DTG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74LCX16244DTG 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 MC74LCX16244DTG reliable?
The price and inventory of MC74LCX16244DTG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74LCX16244DTG is usually 5 days.
3.What payment methods are accepted for MC74LCX16244DTG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74LCX16244DTG transactions.
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4.How is shipping managed for MC74LCX16244DTG?
MC74LCX16244DTG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74LCX16244DTG 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 MC74LCX16244DTG?
For technical support, including MC74LCX16244DTG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74LCX16244DTG requirements.
6.How does Aetrix verify that MC74LCX16244DTG is sourced from the original manufacturer or authorized distributors?
All MC74LCX16244DTG 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 MC74LCX16244DTG meets industry standards.
7.What is the process for return or replacement of MC74LCX16244DTG?
All MC74LCX16244DTG units undergo pre-shipment inspection (PSI). If there is an issue with MC74LCX16244DTG, 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 MC74LCX16244DTG part is unused and in its original packaging.
Return procedure for MC74LCX16244DTG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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