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onsemi 74LCXH16244MTDX
- Part No.:
- 74LCXH16244MTDX
- Manufacturer:
- onsemi
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74LCXH16244MTDX.pdf
- Description:
- IC BUF NON-INVERT 3.6V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:900
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Product details
Overview
74LCXH16244MTDX from ON Semiconductor is a low-voltage 16-bit non-inverting buffer/line driver with bushold inputs and nibble-selectable 3-STATE outputs, designed for memory/address bus driving and clock distribution in 2.3V–3.6V systems with 5V-tolerant I/O. It delivers 24 mA output drive at VCC = 3.0V, 4.5 ns max propagation delay, and operates across –40°C to +85°C.
For engineers reviewing the 74LCXH16244MTDX datasheet, pinout, applications, or equivalent options, key selection criteria include bushold-enabled floating-input immunity, independent 4-bit output enable control, 5V-tolerant I/O compatibility, and TSSOP-48 packaging for high-density PCB layouts.
Technical Context
The 74LCXH16244MTDX implements four independent 4-bit buffer sections, each with dedicated active-low OE inputs (OE1–OE4), enabling granular 3-STATE control per nibble. Its bushold circuitry actively maintains valid logic levels on un-driven inputs without external resistors.
Designed using advanced CMOS process, it supports mixed-voltage interfacing: VCC operates at 2.3V–3.6V while all inputs and outputs tolerate up to 5.5V, allowing seamless connection to legacy 5V logic without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3V to 3.6V - Enables operation in modern low-power 2.5V/3.3V systems while maintaining noise margin. |
| Propagation Delay | 4.5 ns max at VCC = 3.0V - Supports high-speed address/data bus timing in memory interfaces up to ~220 MHz. |
| Output Drive | ±24 mA at VCC = 3.0V - Drives multiple LVTTL or LCX loads without external buffers in point-to-point or stub-bus topologies. |
| I/O Voltage Tolerance | 5.5V max on all inputs/outputs - Allows direct interfacing with 5V peripherals or controllers without level-shifting circuitry. |
| Bushold Current | 45 µA min hold current at VIN = 0.7V (VCC = 2.3V) - Actively retains logic state on floating inputs, eliminating pull-up resistor BOM cost and layout area. |
| Operating Temp | –40°C to +85°C - Qualified for industrial temperature range, suitable for embedded control and communications equipment. |
| Package | MTD48 - 48-pin Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1 mm body width, 0.5 mm pitch. |
Pinout & Package
74LCXH16244MTDX is housed in a 48-pin TSSOP (MTD48) package with 0.5 mm lead pitch and 6.1 mm body width, optimized for automated assembly and thermal performance in space-constrained designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| O0–O3 | Nibble 1 outputs | Non-inverting buffered outputs enabled by OE1; driven to HIGH/LOW or high-Z based on OE1 state. |
| O4–O7 | Nibble 2 outputs | Non-inverting buffered outputs enabled by OE2; electrically isolated from other nibbles during 3-STATE. |
| O8–O11 | Nibble 3 outputs | Non-inverting buffered outputs enabled by OE3; supports independent bus segment control. |
| O12–O15 | Nibble 4 outputs | Non-inverting buffered outputs enabled by OE4; allows selective activation of peripheral data lanes. |
| I0–I15 | Data inputs | Feature integrated bushold circuitry - holds last valid logic state when left floating, removing need for external biasing. |
| OE1–OE4 | Active-low nibble enables | Four independent controls; pulling any OE LOW activates corresponding 4-bit output group; tying together enables full 16-bit mode. |
| VCC | Power supply | Single 2.3V–3.6V supply; powers internal logic and output drivers; decoupling required per JEDEC MO-153 layout guidelines. |
| GND | Ground reference | Dual ground pins (pins 24 and 48) reduce ground bounce and improve signal integrity in high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| Bushold input retention | Eliminates external pull-up/pull-down resistors on all 16 inputs, reducing BOM count, board area, and potential signal integrity issues from parasitic loading. |
| Nibble-selectable 3-STATE | Four independent OE inputs allow dynamic partitioning of 16-bit buses - e.g., enable only address bits A0–A3 while holding data lines in high-Z during arbitration. |
| 5V-tolerant I/O | Permits direct connection to 5V microcontrollers, FPGAs, or legacy peripherals without level translators, simplifying mixed-voltage system design. |
| Low quiescent ICC | 20 µA max ICC at VCC = 3.0V - minimizes standby power in battery-backed or always-on subsystems such as real-time clocks or configuration storage interfaces. |
| High noise immunity | Guaranteed VIH/VIL thresholds (e.g., VIH ≥ 2.0V at VCC = 3.6V) ensure robust operation in electrically noisy industrial environments. |
Applications
| Memory Address Buffering | Industrial Bus Transceiver |
|---|---|
Use Scenario: Driving 16-bit address lines from an MCU to SRAM or Flash memory in a programmable logic controller. IC Role / Device Role / Timing Role: Non-inverting buffer with nibble-selectable 3-STATE control ensures clean address propagation and prevents bus contention during memory access cycles. Use Value: Bushold inputs prevent undefined address states during reset or sleep modes; 4.5 ns tPD meets tight timing budgets for 20+ MHz memory access. | Use Scenario: Interfacing a 3.3V FPGA I/O bank to a 5V industrial fieldbus transceiver (e.g., RS-485 PHY). IC Role / Device Role / Timing Role: Level-translating buffer with 5V-tolerant outputs and bushold-enabled inputs isolates FPGA from bus voltage faults and floating conditions. Use Value: Eliminates discrete level shifters and pull-ups; ±24 mA drive sustains signal integrity over long traces in factory-floor wiring. |
| Clock Distribution Hub | Configurable Data Path Isolation |
Use Scenario: Distributing a 3.3V system clock to multiple synchronous peripherals (ADCs, DACs, sensors) in test equipment. IC Role / Device Role / Timing Role: Low-skew non-inverting buffer with independent nibble enables allows selective clock gating per peripheral group. Use Value: 1 ns max output-to-output skew ensures synchronous sampling; bushold prevents clock glitches during power sequencing. | Use Scenario: Isolating two 8-bit data paths between a host processor and dual sensor modules in medical diagnostics hardware. IC Role / Device Role / Timing Role: Dual-nibble 3-STATE driver enables time-multiplexed access to shared data lines while preventing cross-talk. Use Value: OE1/OE2 control allows software-selectable path routing; 24 mA drive supports capacitive loads up to 50 pF per line. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVC16244ADGG | Lower VCC range (1.65V–3.6V); no bushold; 24 mA drive at VCC = 3.3V; same TSSOP-48 package. | Lacks bushold - requires external pull-ups on unused inputs; better suited for fully driven, low-impedance buses. | Select when bushold is unnecessary and lowest possible VCC operation (down to 1.65V) is required. |
| SN74ALVC16244DGGR | Wider VCC range (1.65V–3.6V); no bushold; 24 mA drive; enhanced ESD (±8 kV HBM); same pinout. | No bushold support; higher ESD rating improves robustness in handling-sensitive environments but adds no functional advantage for buffered I/O. | Prefer for high-reliability manufacturing floors where static discharge risk exceeds typical industrial levels. |
Compared with 74LCXH16244MTDX, the 74LVC16244ADGG and SN74ALVC16244DGGR offer identical 16-bit buffering and TSSOP-48 packaging but omit bushold - requiring external biasing for floating inputs - making them functionally compatible only in fully driven bus architectures.
Availability
74LCXH16244MTDX is available at Aetrix Electronics and suitable for memory interface design, industrial bus isolation, clock distribution, and configurable data path routing requiring stable component supply and long-term industrial lifecycle support.
Supply support for 74LCXH16244MTDX 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
ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, logic, and custom devices for automotive, industrial, cloud computing, and IoT applications.
The 74LCXH16244MTDX belongs to ON Semiconductor's legacy LCX logic family, engineered for low-voltage, high-speed, 5V-tolerant interfacing in mixed-signal embedded systems where bus integrity and input robustness are critical.
FAQ
What is the operating voltage range for the 74LCXH16244MTDX?
The 74LCXH16244MTDX operates from 2.3V to 3.6V on VCC. Its inputs and outputs are 5V-tolerant, supporting up to 5.5V, which enables reliable interfacing with both 3.3V and legacy 5V logic families without external level shifters. This dual-voltage capability is confirmed in the Absolute Maximum Ratings and Recommended Operating Conditions tables of the Fairchild/ON Semiconductor datasheet.
Does the 74LCXH16244MTDX require external pull-up resistors on its inputs?
No, the 74LCXH16244MTDX does not require external pull-up resistors because it integrates bushold circuitry on all 16 inputs (I0–I15). This feature actively maintains the last valid logic state on floating or unterminated inputs, eliminating the need for external biasing components and reducing BOM cost and PCB area. The bushold minimum drive current is specified as 45 µA at VCC = 2.3V.
How is 3-STATE control implemented on the 74LCXH16244MTDX?
The 74LCXH16244MTDX uses four independent active-low output enable inputs - OE1 through OE4 - each controlling a 4-bit nibble (O0–O3, O4–O7, O8–O11, O12–O15). When an OE pin is LOW, its associated outputs drive HIGH or LOW; when HIGH, those outputs enter high-impedance state. This nibble-level control allows flexible bus segmentation and avoids contention in multi-master systems.
What package type is used for the 74LCXH16244MTDX?
The 74LCXH16244MTDX is packaged in a 48-pin Thin Shrink Small Outline Package (TSSOP), designated MTD48 per JEDEC MO-153. It features a 6.1 mm body width, 0.5 mm lead pitch, and exposed pad-compatible footprint. This package is optimized for automated surface-mount assembly and provides superior thermal and electrical performance compared to standard SOIC variants.
Is the 74LCXH16244MTDX suitable for industrial temperature applications?
Yes, the 74LCXH16244MTDX is rated for operation from –40°C to +85°C, meeting industrial temperature requirements. This specification is explicitly stated in the Recommended Operating Conditions table of the datasheet and validated across AC/DC parametric testing. Its robust latch-up immunity (>500 mA) and ESD protection (2000V HBM) further reinforce suitability for harsh industrial environments.
74LCXH16244MTDX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74LCXH
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
74LCXH16244MTDX FAQ
1.How can I place an order for 74LCXH16244MTDX through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LCXH16244MTDX 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 74LCXH16244MTDX reliable?
The price and inventory of 74LCXH16244MTDX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LCXH16244MTDX is usually 5 days.
3.What payment methods are accepted for 74LCXH16244MTDX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LCXH16244MTDX transactions.
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4.How is shipping managed for 74LCXH16244MTDX?
74LCXH16244MTDX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LCXH16244MTDX 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 74LCXH16244MTDX?
For technical support, including 74LCXH16244MTDX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LCXH16244MTDX requirements.
6.How does Aetrix verify that 74LCXH16244MTDX is sourced from the original manufacturer or authorized distributors?
All 74LCXH16244MTDX 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 74LCXH16244MTDX meets industry standards.
7.What is the process for return or replacement of 74LCXH16244MTDX?
All 74LCXH16244MTDX units undergo pre-shipment inspection (PSI). If there is an issue with 74LCXH16244MTDX, 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 74LCXH16244MTDX part is unused and in its original packaging.
Return procedure for 74LCXH16244MTDX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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