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Texas Instruments SN74LVCH16244ADL
- Part No.:
- SN74LVCH16244ADL
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74LVCH16244ADL.pdf
- Description:
- IC BUF NON-INVERT 3.6V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:899
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Product details
Overview
SN74LVCH16244ADL from Texas Instruments is a 16-bit noninverting buffer/driver with 3-state outputs, designed for 1.65-V to 3.6-V VCC operation. It functions as four independent 4-bit buffers (each with dedicated active-low OE), supports 5.5-V-tolerant inputs, delivers ≤4.1 ns propagation delay at 3.3 V, and enables bus isolation in memory address, clock, and data bus applications.
For engineers reviewing the SN74LVCH16244ADL datasheet, SN74LVCH16244ADL pinout, SN74LVCH16244ADL application, or SN74LVCH16244ADL equivalent, key selection criteria include Ioff-enabled live insertion support, bus-hold on all inputs eliminating external resistors, mixed-mode 3.3-V/5-V signal translation capability, and SSOP-48 package compatibility with high-density PCB layouts.
Technical Context
The SN74LVCH16244ADL implements four independent 4-bit noninverting buffer sections, each controlled by a dedicated active-low output-enable (OE) input. Its Ioff circuitry disables outputs and blocks current backflow when VCC = 0 V, enabling safe partial-power-down operation.
Inputs feature bus-hold circuitry that maintains valid logic states without external pullup/pulldown resistors, and tolerate up to 5.5 V regardless of VCC (1.65–3.6 V), allowing direct interfacing between 5-V legacy logic and 3.3-V system domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - Enables operation across low-voltage embedded rails including 1.8 V, 2.5 V, and 3.3 V systems. |
| Max tpd | 4.1 ns at VCC = 3.3 V - Supports high-speed data transmission in memory address and clock distribution paths. |
| Input Voltage Tolerance | Up to 5.5 V - Allows direct connection to 5-V CMOS/TTL sources without level-shifting circuitry. |
| Ioff Support | Active at VCC = 0 V - Prevents damaging back-current during hot-plug or power sequencing events. |
| Bus-Hold Inputs | Integrated on all A-inputs - Eliminates need for external biasing resistors, reducing BOM count and layout area. |
| Output Drive | ±24 mA at VCC = 3.0 V - Sufficient to drive multiple CMOS loads or moderate capacitive buses. |
| ESD Rating | 2000-V HBM - Meets industrial-grade robustness requirements per JESD22-A114. |
Pinout & Package
SN74LVCH16244ADL is packaged in a 48-pin SSOP (DL) with 15.88 mm × 7.49 mm body size, optimized for automated assembly and thermal performance in space-constrained applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Active-low output enable | Individually controls 4-bit output groups; tied high via pullup for power-up high-Z state. |
| 1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4 | Buffer input | 16 total inputs with bus-hold; accept 0–5.5 V signals regardless of VCC level. |
| 1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4 | Noninverting 3-state output | True outputs with symmetrical drive; high-impedance when corresponding OE is high. |
| VCC (Pins 7, 18, 31, 42) | Power supply | Four distributed VCC pins reduce switching noise and improve power integrity across wide bus. |
| GND (Pins 4, 10, 15, 21, 28, 34, 39, 45) | Ground reference | Eight GND pins provide low-inductance return paths for all 16 drivers and minimize ground bounce. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5-V-tolerant inputs on 3.3-V VCC enable seamless interface between legacy 5-V peripherals and modern low-voltage controllers. |
| Ioff partial-power-down protection | Prevents current backflow when VCC is off, supporting hot-swap and modular system architectures. |
| Integrated bus-hold circuitry | Maintains stable logic levels on unused inputs, removing requirement for 10-kΩ pullup/pulldown resistors per line. |
| Low ground bounce (VOLP < 0.8 V) | Reduces noise coupling into adjacent signal lines and improves signal integrity in high-speed parallel buses. |
| Widebus™ architecture | Optimized layout and drive strength for dense memory and address bus applications requiring minimal propagation skew. |
Applications
| Memory Address Buffering | PCI/PCIe Slot Interface |
|---|---|
Use Scenario: Driving address lines from a microcontroller to multiple SRAM or Flash devices in a shared bus topology. IC Role / Device Role / Timing Role: Noninverting 16-bit buffer with per-group OE control isolates memory banks during read/write cycles. Use Value: Enables bank-select isolation without external logic; 4.1 ns tpd ensures setup/hold timing margins at 50-MHz bus speeds. | Use Scenario: Level-shifting and buffering control signals (e.g., FRAME#, IRDY#, TRDY#) between 3.3-V host controller and 5-V add-in card. IC Role / Device Role / Timing Role: Bidirectional voltage translator and driver with Ioff protection during card insertion/removal. Use Value: Eliminates discrete level shifters; 5.5-V input tolerance allows direct connection to 5-V card-side signals. |
| Industrial PLC Backplane | Embedded Display Interface |
Use Scenario: Isolating and driving parallel I/O expansion modules over long backplane traces subject to EMI and crosstalk. IC Role / Device Role / Timing Role: High-drive 3-state buffer with distributed VCC/GND pins minimizing ground bounce in noisy environments. Use Value: ±24 mA drive sustains signal integrity over 10-cm traces; eight GND pins suppress common-mode noise. | Use Scenario: Buffering RGB data and control lines (HSYNC, VSYNC, DE) from an SoC to a TFT-LCD panel with 5-V tolerant timing inputs. IC Role / Device Role / Timing Role: Low-skew 16-bit driver with bus-hold preventing floating inputs during panel power-up/down sequences. Use Value: Bus-hold eliminates flicker or undefined display states during power transitions; 1.65–3.6 V range matches SoC I/O rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16244ADL | Lacks Ioff and bus-hold features; 5-V input tolerance limited to VCC + 0.5 V. | Not suitable for live insertion or unpowered bus isolation; requires external pullups on unused inputs. | Select only if cost sensitivity outweighs reliability requirements in static systems. |
| 74ALVCH16244DL | Higher speed (tpd ≤ 3.2 ns at 3.3 V) but narrower VCC range (2.3–3.6 V); no 5-V input tolerance. | Cannot interface with 5-V logic; unsuitable for mixed-voltage designs or legacy peripheral integration. | Choose only for pure 3.3-V high-speed applications where voltage margin is guaranteed. |
Compared with SN74LVC16244ADL and 74ALVCH16244DL, SN74LVCH16244ADL uniquely combines 5.5-V input tolerance, Ioff, and bus-hold in a single 3.3-V-compatible device-making it the only option for robust mixed-voltage bus isolation with zero external components.
Availability
SN74LVCH16244ADL is available at Aetrix Electronics and suitable for memory address buffering, PCI slot interface, industrial PLC backplane, and embedded display interface applications requiring stable component supply and long-term industrial lifecycle support.
Supply support for SN74LVCH16244ADL 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 global semiconductor company specializing in analog and embedded processing solutions, with leadership in logic, power management, and signal chain technologies.
The SN74LVCH16244ADL belongs to TI's Widebus™ family, engineered specifically to improve density and performance of 3-state memory address drivers, clock drivers, and bus-oriented receivers/transmitters in high-reliability systems.
FAQ
What is the maximum input voltage rating for SN74LVCH16244ADL?
The SN74LVCH16244ADL supports input voltages up to 5.5 V across its entire operating VCC range (1.65–3.6 V). This overvoltage tolerance enables direct interfacing with 5-V logic families without external level-shifting circuitry, making SN74LVCH16244ADL ideal for mixed-voltage system integration where legacy peripherals connect to modern low-voltage controllers.
Does SN74LVCH16244ADL support live insertion or hot-swap applications?
Yes, SN74LVCH16244ADL supports live insertion via its Ioff feature, which disables outputs and blocks current backflow when VCC = 0 V. This prevents damage during hot-plug events in modular systems such as PCIe cards or field-replaceable I/O modules. The SN74LVCH16244ADL datasheet confirms Ioff compliance per JESD78, ensuring safe operation during partial-power-down sequences.
How does the bus-hold feature on SN74LVCH16244ADL eliminate external resistors?
SN74LVCH16244ADL integrates bus-hold circuitry on all 16 input pins (1A1–4A4), actively maintaining the last-valid logic state when inputs float. This eliminates the need for external 10-kΩ pullup or pulldown resistors, reducing BOM count, PCB area, and potential noise coupling. The SN74LVCH16244ADL specification defines bus-hold current as ±45 µA at 3 V, sufficient to override typical leakage currents in industrial environments.
What is the propagation delay of SN74LVCH16244ADL at 3.3 V?
At VCC = 3.3 V and TA = 25°C, SN74LVCH16244ADL achieves a maximum propagation delay (tpd) of 4.1 ns, measured from input to output under loaded conditions (CL = 50 pF). This value is specified in the Switching Characteristics table of the SN74LVCH16244ADL datasheet (SCES494B) and enables reliable operation in 50-MHz address/data buses with adequate timing margins.
Which package type is used for SN74LVCH16244ADL?
SN74LVCH16244ADL uses the SSOP-48 (DL) package with dimensions 15.88 mm × 7.49 mm. This surface-mount package features gull-wing leads, RoHS-compliant NiPdAu plating, and a moisture sensitivity level (MSL) rating of Level-1 (unlimited floor life at ≤30°C/60% RH), making it suitable for standard reflow assembly processes without baking requirements.
SN74LVCH16244ADL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCH
- Package/Case:
- 48-BSSOP (0.295", 7.50mm 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:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
SN74LVCH16244ADL FAQ
1.How can I place an order for SN74LVCH16244ADL through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCH16244ADL 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 SN74LVCH16244ADL reliable?
The price and inventory of SN74LVCH16244ADL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCH16244ADL is usually 5 days.
3.What payment methods are accepted for SN74LVCH16244ADL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVCH16244ADL transactions.
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4.How is shipping managed for SN74LVCH16244ADL?
SN74LVCH16244ADL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCH16244ADL 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 SN74LVCH16244ADL?
For technical support, including SN74LVCH16244ADL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCH16244ADL requirements.
6.How does Aetrix verify that SN74LVCH16244ADL is sourced from the original manufacturer or authorized distributors?
All SN74LVCH16244ADL 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 SN74LVCH16244ADL meets industry standards.
7.What is the process for return or replacement of SN74LVCH16244ADL?
All SN74LVCH16244ADL units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCH16244ADL, 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 SN74LVCH16244ADL part is unused and in its original packaging.
Return procedure for SN74LVCH16244ADL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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