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Texas Instruments 74ALVCH16244DLG4
- Part No.:
- 74ALVCH16244DLG4
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
74ALVCH16244DLG4.pdf
- Description:
- IC BUF NON-INVERT 3.6V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,707
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Product details
Overview
74ALVCH16244DLG4 from Texas Instruments is a 16-bit non-inverting buffer/driver with 3-state outputs, designed for 1.65 V to 3.6 V operation. It features ±24-mA drive strength at 3.3 V, 3 ns max propagation delay, bus-hold inputs eliminating external resistors, and operates across –40°C to 85°C. It serves as a high-density address/data bus driver in memory subsystems and FPGA I/O expansion.
For engineers reviewing the 74ALVCH16244DLG4 datasheet, 74ALVCH16244DLG4 pinout, 74ALVCH16244DLG4 application, or 74ALVCH16244DLG4 equivalent, key selection criteria include 48-pin SSOP (DL) package compatibility, 3.3-V logic-level translation capability, 3-state output control timing (ten/tdis ≤ 5.7 ns), and bus-hold input robustness for unterminated stubs.
Technical Context
This device implements four independent 4-bit buffers, each with symmetrical active-low output-enable (OE) inputs and true (non-inverted) outputs. Its bus-hold circuitry actively maintains valid logic states on unused inputs without external biasing.
It supports mixed-voltage system interfacing via 1.65–3.6 V supply range and meets JESD 17 latch-up immunity (>250 mA) and JESD 22 ESD ratings (2000-V HBM, 200-V MM). All control inputs must be tied to VCC or GND for reliable power-up behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.65 V to 3.6 V - enables direct interface between 1.8-V, 2.5-V, and 3.3-V logic domains |
| Max Propagation Delay | 3 ns at 3.3 V - supports >150-MHz bus toggle rates in high-speed digital systems |
| Output Drive Strength | ±24 mA at 3.3 V - drives 50-Ω transmission lines or multiple CMOS loads without buffering |
| Bus-Hold Input Current | ±75 µA at 3 V - sustains stable logic levels on floating inputs, removing need for pullup/pulldown resistors |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and communications equipment |
| Input/Output Capacitance | 6 pF data inputs / 7 pF outputs - minimizes signal distortion and crosstalk in dense PCB layouts |
| 3-State Enable/Disable Time | ten ≤ 5.7 ns, tdis ≤ 5.2 ns at 3.3 V - ensures clean bus arbitration with minimal contention window |
Pinout & Package
74ALVCH16244DLG4 uses a 48-pin SSOP (Shrink Small Outline Package) with 0.5-mm pitch, JEDEC MO-153 compliant, body dimensions 12.6 mm × 6.2 mm × 1.95 mm max height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Active-low output enable | Individually controls 4-bit group output state; all must be low for corresponding Y outputs to drive |
| 1A1–1A4, 2A1–2A4, etc. | Data inputs | 16 buffered inputs grouped into four 4-bit channels; bus-hold enabled on all |
| 1Y1–1Y4, 2Y1–2Y4, etc. | True 3-state outputs | 16 non-inverting outputs; high-impedance when respective OE is high |
| VCC (Pins 7, 18, 31, 42) | Power supply | Four dedicated VCC pins reduce IR drop and improve noise immunity across wide bus |
| GND (Pins 4, 10, 15, 21, 27, 32, 37, 45) | Ground reference | Eight GND pins provide low-inductance return paths for all 16 drivers and internal logic |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range | 1.65–3.6 V operation allows seamless integration into multi-rail systems without level shifters |
| Bus-Hold Inputs | Eliminates external pull resistors on unused inputs, reducing BOM count and board space |
| High-Drive Outputs | ±24-mA drive at 3.3 V supports driving long traces or fan-out to ≥10 LVTTL loads |
| Low Propagation Delay | 3 ns max tpd enables use in sub-5-ns timing budget designs such as DDR memory interfaces |
| Latch-Up Immunity | Exceeds 250 mA per JESD 17 - ensures robustness against transient current faults in noisy environments |
Applications
| Memory Address Buffering | FPGA I/O Expansion |
|---|---|
Use Scenario: Driving 16-bit address bus from microcontroller to SRAM or Flash memory in industrial PLCs. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer isolating CPU address lines from memory bus; OE synchronized to memory enable strobe. Use Value: Prevents bus contention during memory access cycles and supports hot-swap address line reconfiguration. | Use Scenario: Extending I/O count of Xilinx Artix-7 FPGA by interfacing parallel peripheral buses (e.g., LCD controller, ADC interface). IC Role / Device Role / Timing Role: Level-translating buffer between 3.3-V FPGA bank and 2.5-V or 1.8-V peripheral logic. Use Value: Maintains signal integrity across voltage domains while enabling dynamic bus gating via OE control. |
| Backplane Data Distribution | Industrial Bus Isolation |
Use Scenario: Distributing parallel status/data signals across modular backplane in test equipment rack. IC Role / Device Role / Timing Role: Fan-out buffer replicating control signals (e.g., reset, interrupt) to multiple slot controllers. Use Value: Ensures simultaneous edge delivery to all receivers with <5.7 ns enable skew, minimizing inter-slot timing skew. | Use Scenario: Isolating CAN transceiver data lines from MCU GPIO in automotive body control module. IC Role / Device Role / Timing Role: Bidirectional bus buffer decoupling noisy CAN PHY from sensitive MCU I/O pins. Use Value: Reduces EMC susceptibility and prevents ground bounce coupling via separate VCC/GND pin sets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16244ADLR | Lower drive (±24 mA only at 3.3 V; degrades to ±12 mA at 2.5 V); no bus-hold | Requires external pull resistors on unused inputs; less suitable for partial-bus configurations | Select when cost sensitivity outweighs bus-hold convenience and mixed-voltage operation is not required |
| 74AVC16244DGG | Wider voltage range (1.2–3.6 V); higher speed (tpd = 2.3 ns @ 3.3 V); no bus-hold | Supports 1.2-V core logic but lacks bus-hold - increases risk of floating-input glitches | Prefer for ultra-high-speed 3.3-V-only systems where layout guarantees terminated inputs |
Compared with SN74LVC16244ADLR and 74AVC16244DGG, the 74ALVCH16244DLG4 uniquely combines bus-hold functionality, industrial temperature range, and guaranteed ±24-mA drive across its full 1.65–3.6 V supply range - making it optimal for ruggedized, partially loaded bus architectures.
Availability
74ALVCH16244DLG4 is available at Aetrix Electronics and suitable for industrial automation controllers, FPGA carrier boards, memory subsystems, and test equipment requiring stable component supply and long-term obsolescence management.
Supply support for 74ALVCH16244DLG4 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
Texas Instruments is a U.S.-based semiconductor company specializing in analog, embedded processing, and logic solutions with global manufacturing and quality certification.
The ALVCH family targets high-speed, low-voltage bus interface applications - specifically engineered for memory addressing, clock distribution, and 3-state data path control in space-constrained industrial and communications systems.
FAQ
What is the recommended power-up sequence for 74ALVCH16244DLG4?
TI specifies that OE inputs must be held high (inactive) or tied to VCC via a pullup resistor during power-up to ensure outputs remain in high-impedance state until system initialization completes. For 74ALVCH16244DLG4, a 10-kΩ pullup to VCC on each OE pin prevents unintended bus contention at power-on. This requirement is documented in the "Recommended Operating Conditions" section of the SCES014K datasheet.
Does 74ALVCH16244DLG4 support mixed-voltage operation between input and output sides?
No - the 74ALVCH16244DLG4 is a single-supply device: all inputs and outputs reference the same VCC pin. It does not provide level-shifting functionality. However, its 1.65–3.6 V supply range allows interoperability with 1.8-V, 2.5-V, and 3.3-V logic families when VCC is set to match the target interface voltage. The 74ALVCH16244DLG4 datasheet confirms VI and VO ranges scale with VCC.
Can bus-hold circuitry in 74ALVCH16244DLG4 be disabled?
No - bus-hold is permanently enabled on all data inputs (A1–A16) of the 74ALVCH16244DLG4 and cannot be disabled via configuration or external control. TI explicitly warns against using pullup/pulldown resistors with bus-hold inputs, as they conflict with the internal keeper circuit. This behavior is defined in the "Terminal Functions" and "Electrical Characteristics" sections of the SCES014K datasheet.
What is the thermal resistance θJA for 74ALVCH16244DLG4 in its SSOP package?
The 74ALVCH16244DLG4 in the DL (SSOP-48) package has a junction-to-ambient thermal resistance (θJA) of 63°C/W, as specified in the "Absolute Maximum Ratings" table of the SCES014K datasheet. This value assumes standard JEDEC 2-layer board conditions (1-inch² copper pad, 2 oz Cu). Derating is required above 70°C ambient for continuous 24-mA output loading.
Is 74ALVCH16244DLG4 RoHS compliant and lead-free?
Yes - the 74ALVCH16244DLG4 is RoHS compliant and features NiPdAu (NIPDAU) lead finish, as confirmed in TI's Packaging Information Addendum (11-Nov-2025). It carries MSL Level-1 rating (unlimited floor life at ≤30°C/60% RH) and is rated for peak reflow of 260°C. The "G4" suffix denotes green, lead-free, RoHS-compliant packaging per TI's standard nomenclature.
74ALVCH16244DLG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVCH
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
74ALVCH16244DLG4 FAQ
1.How can I place an order for 74ALVCH16244DLG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ALVCH16244DLG4 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 74ALVCH16244DLG4 reliable?
The price and inventory of 74ALVCH16244DLG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ALVCH16244DLG4 is usually 5 days.
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74ALVCH16244DLG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ALVCH16244DLG4 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 74ALVCH16244DLG4?
For technical support, including 74ALVCH16244DLG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ALVCH16244DLG4 requirements.
6.How does Aetrix verify that 74ALVCH16244DLG4 is sourced from the original manufacturer or authorized distributors?
All 74ALVCH16244DLG4 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 74ALVCH16244DLG4 meets industry standards.
7.What is the process for return or replacement of 74ALVCH16244DLG4?
All 74ALVCH16244DLG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74ALVCH16244DLG4, 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 74ALVCH16244DLG4 part is unused and in its original packaging.
Return procedure for 74ALVCH16244DLG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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