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Texas Instruments SN74LVCH16244ADLG4
- Part No.:
- SN74LVCH16244ADLG4
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74LVCH16244ADLG4.pdf
- Description:
- IC BUF NON-INVERT 3.6V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,687
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Product details
Overview
SN74LVCH16244ADLG4 from Texas Instruments is a 16-bit noninverting 3-state buffer/driver with four independent 4-bit sections, operating from 1.65 V to 3.6 V, supporting 5.5-V-tolerant inputs and delivering ≤4.1 ns propagation delay at 3.3 V - used for memory address buffering, bus isolation, and level translation in server backplanes and telecom infrastructure.
For engineers reviewing the SN74LVCH16244ADLG4 datasheet, SN74LVCH16244ADLG4 pinout, SN74LVCH16244ADLG4 application, or SN74LVCH16244ADLG4 equivalent, key selection criteria include Ioff-enabled live insertion support, bus-hold on all inputs eliminating external resistors, 3-state output drive capability up to ±24 mA per channel, and compatibility with mixed 3.3-V/5-V signal environments.
Technical Context
This device implements four independent 4-bit noninverting buffers, each with an active-low output-enable (OE) input controlling its Y outputs. Each section operates symmetrically with true (noninverting) logic and supports partial-power-down via Ioff circuitry that disables outputs when VCC = 0 V.
Input voltage tolerance extends to 5.5 V regardless of VCC (1.65–3.6 V), enabling down-translation from 5-V logic to 3.3-V buses. Bus-hold circuitry actively maintains valid logic states on undriven inputs without external pullups, and output ground bounce (VOLP) remains <0.8 V at VCC = 3.3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - enables operation across low-voltage embedded and industrial supply rails |
| Input Voltage Tolerance | Up to 5.5 V - allows direct interfacing with legacy 5-V logic without level shifters |
| tpd (Max) | 4.1 ns at VCC = 3.3 V - supports high-speed address/data buffering in DDR and PCIe auxiliary paths |
| Ioff Support | Active at VCC = 0 V - prevents back-drive current during hot-swap or partial power-down sequences |
| Bus-Hold | Integrated on all A inputs - eliminates need for external pullup/pulldown resistors in unterminated stubs |
| Output Drive | ±24 mA at VCC = 3.0 V - drives moderate capacitive loads (e.g., 30 pF) with clean edges |
| ESD Rating | 2000-V HBM - meets industrial handling requirements without special ESD precautions |
Pinout & Package
SN74LVCH16244ADLG4 is packaged in a 48-pin SSOP (DL) with 15.88 mm × 7.49 mm body size and 0.635 mm lead pitch. Pin numbering follows standard DL package top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Active-low output enable | Controls 4-bit group (1Y1–1Y4, etc.); tied high via pullup for default enable during power-up |
| 1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4 | Buffer input | 5.5-V-tolerant CMOS inputs with integrated bus-hold; no external bias required |
| 1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4 | 3-state noninverting output | Drive-strength configurable via VCC; high-impedance state asserted when OE = 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, 28, 34, 39, 45) | Ground reference | Eight GND pins provide low-inductance return paths for switching currents |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC range (1.65–3.6 V) | Supports single-supply operation across battery-powered, industrial, and computing platforms |
| 5.5-V-tolerant inputs | Enables seamless integration into mixed-voltage systems without external translators |
| Ioff partial-power-down | Prevents damaging current flow when VCC is off - critical for hot-pluggable modules |
| Integrated bus-hold | Eliminates external bias components on unused inputs - reduces BOM count and layout area |
| Low ground bounce (VOLP < 0.8 V) | Maintains signal integrity during simultaneous switching - essential for noise-sensitive analog co-location |
| High ESD robustness (2000-V HBM) | Reduces field failure risk during assembly and handling in non-classified environments |
Applications
| Server Memory Subsystem | Industrial PLC Backplane |
|---|---|
|
Use Scenario: Buffering address lines between CPU and multi-rank DDR4 memory modules with dynamic rank selection. IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating memory controller outputs during rank switching; OE controlled by memory controller. Use Value: Enables glitch-free rank transitions using four independent OE controls - avoids bus contention during reconfiguration. |
Use Scenario: Level-shifting and driving I/O expansion module address/data buses in modular PLC chassis. IC Role / Device Role / Timing Role: 16-bit bidirectional-capable buffer translating 5-V fieldbus signals to 3.3-V FPGA logic while maintaining timing margins. Use Value: 5.5-V input tolerance and Ioff allow safe hot-swap of I/O modules without system reset or power cycling. |
| Telecom Baseband Processing | Automotive ADAS Domain Controller |
|
Use Scenario: Isolating control signals between baseband processor and RF transceiver ASICs in 5G small cell units. IC Role / Device Role / Timing Role: Four-group 3-state driver managing clock enable, reset, and configuration lines with independent gating. Use Value: ≤4.1 ns tpd ensures setup/hold compliance for 100-MHz control interfaces; bus-hold prevents floating states during firmware updates. |
Use Scenario: Driving CAN FD and Ethernet AVB debug interface signals from microcontroller to diagnostic connector in domain controller ECUs. IC Role / Device Role / Timing Role: Signal integrity-preserving buffer with low VOLP and high noise immunity for safety-critical diagnostics path. Use Value: Dual VCC/GND pin pairs minimize ground bounce-induced errors in ISO 26262-compliant communication channels. |
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 |
|---|---|---|---|
| SN74LVC16244ADGGR | No bus-hold; 5-V-tolerant inputs only up to VCC + 0.5 V (not 5.5 V) | Requires external pullups on unused inputs; unsuitable for unpowered-bus scenarios | Select when cost sensitivity outweighs bus-hold requirement and 5-V tolerance is limited to same-supply-domain use |
| 74ALVCH16244DLR | Higher VCC max (3.6 V vs. 3.6 V), but lower tpd (3.2 ns @ 3.3 V); identical Ioff and bus-hold | Better timing margin for >125-MHz control paths; same thermal profile and pinout | Select when sub-4-ns propagation is mandatory and TI's LVCH family qualification is not required |
Compared with SN74LVCH16244ADLG4, SN74LVC16244ADGGR lacks bus-hold and reduced input overvoltage tolerance - limiting use in floating-input or mixed-voltage hot-swap systems - while 74ALVCH16244DLR delivers faster timing but shares identical packaging, Ioff, and application robustness.
Availability
SN74LVCH16244ADLG4 is available at Aetrix Electronics and suitable for server memory subsystems, industrial PLC backplanes, and telecom baseband processing requiring stable component supply, long-term lifecycle support, and RoHS-compliant SSOP packaging.
Supply support for SN74LVCH16244ADLG4 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 technologies, with leadership in logic, power management, and signal chain solutions for industrial, automotive, and communications markets.
SN74LVCH16244ADLG4 belongs to the Widebus™ family of advanced CMOS logic devices, designed specifically for high-density, low-voltage bus interface applications requiring robust level translation, hot-swap capability, and noise-immune signal integrity.
FAQ
What is the maximum input voltage rating for SN74LVCH16244ADLG4?
The SN74LVCH16244ADLG4 supports input voltages up to 5.5 V regardless of VCC level (1.65–3.6 V), enabling reliable interfacing with 5-V TTL or CMOS sources in mixed-voltage systems without external level shifters. This overvoltage tolerance is specified across the full operating temperature range (–40°C to 125°C) and is validated per JEDEC JESD8-12.
Does SN74LVCH16244ADLG4 require external pullup resistors on unused inputs?
No - SN74LVCH16244ADLG4 integrates active bus-hold circuitry on all A inputs, which maintains valid logic states without external pullup or pulldown resistors. Using external resistors with bus-hold enabled is explicitly discouraged in the datasheet, as it may cause excessive current draw or logic instability.
What is the purpose of the multiple VCC and GND pins on SN74LVCH16244ADLG4?
SN74LVCH16244ADLG4 features four VCC (pins 7, 18, 31, 42) and eight GND (pins 4, 10, 15, 21, 28, 34, 39, 45) connections to minimize power distribution impedance and reduce simultaneous switching noise. This layout improves signal integrity for high-speed 16-bit buses and supports stable operation under dynamic load conditions typical in memory and backplane applications.
Can SN74LVCH16244ADLG4 be used in hot-swap applications?
Yes - SN74LVCH16244ADLG4 includes Ioff circuitry that disables outputs when VCC = 0 V, preventing damaging current backflow during live insertion or partial power-down. This feature is fully characterized per JESD78 and supports compliant hot-swap operation in modular servers, telecom line cards, and industrial I/O systems.
What is the typical propagation delay of SN74LVCH16244ADLG4 at 2.5 V supply?
At VCC = 2.5 V, the typical propagation delay (tpd) of SN74LVCH16244ADLG4 is 3.9 ns, with a maximum of 6.6 ns across the operating temperature range. This value is measured under standard load conditions (CL = 30 pF, ΔV = ±0.2 V) and reflects consistent performance across all 16 channels within a single device.
SN74LVCH16244ADLG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCH
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
SN74LVCH16244ADLG4 FAQ
1.How can I place an order for SN74LVCH16244ADLG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCH16244ADLG4 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 SN74LVCH16244ADLG4 reliable?
The price and inventory of SN74LVCH16244ADLG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCH16244ADLG4 is usually 5 days.
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5.How can I obtain technical support or documentation for SN74LVCH16244ADLG4?
For technical support, including SN74LVCH16244ADLG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCH16244ADLG4 requirements.
6.How does Aetrix verify that SN74LVCH16244ADLG4 is sourced from the original manufacturer or authorized distributors?
All SN74LVCH16244ADLG4 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 SN74LVCH16244ADLG4 meets industry standards.
7.What is the process for return or replacement of SN74LVCH16244ADLG4?
All SN74LVCH16244ADLG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCH16244ADLG4, 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 SN74LVCH16244ADLG4 part is unused and in its original packaging.
Return procedure for SN74LVCH16244ADLG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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