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Texas Instruments SN74LVTH16244ADLR
- Part No.:
- SN74LVTH16244ADLR
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74LVTH16244ADLR.pdf
- Description:
- IC BUF NON-INVERT 3.6V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:963
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Product details
Overview
SN74LVTH16244ADLR from Texas Instruments is a 3.3-V ABT 16-bit noninverting buffer/driver with 3-state outputs, designed for mixed-mode interfacing between 3.3-V logic and 5-V systems. It features bus-hold circuitry on all data inputs, Ioff support for hot insertion, and operates across –40°C to 125°C. Used in backplane drivers, memory address buffering, and bus isolation in industrial control and telecom infrastructure.
For engineers reviewing the SN74LVTH16244ADLR datasheet, SN74LVTH16244ADLR pinout, SN74LVTH16244ADLR application, or SN74LVTH16244ADLR equivalent, key selection criteria include its 3.3-V VCC with 5-V tolerant inputs, symmetric active-low OE control per 4-bit group, bus-hold elimination of external pull resistors, and guaranteed hot-insertion capability via Ioff and power-up 3-state.
Technical Context
The SN74LVTH16244ADLR implements four independent 4-bit noninverting buffers, each with dedicated active-low output-enable (OE) inputs (1OE–4OE). Its Advanced BiCMOS Technology (ABT) enables low static power dissipation while maintaining TTL-compatible output drive at 3.3-V supply.
Bus-hold circuitry actively maintains valid logic states on undriven inputs without external resistors; Ioff limits current flow during power-down; and power-up 3-state ensures outputs remain high-impedance during VCC ramping from 0 V to 1.5 V - critical for live-insertion in modular systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - supports unregulated battery operation down to 2.7 V without functional loss. |
| IOL / IOH | 64 mA sink / –32 mA source at VCC = 3 V - drives heavy capacitive loads or multiple TTL inputs directly. |
| tPLH / tPHL | 1.2 ns to 4.6 ns (VCC = 3.3 V, CL = 50 pF) - enables high-speed bus buffering in 100-MHz-class digital systems. |
| VIH / VIL | 2.0 V / 0.8 V - compatible with 5-V TTL input thresholds while powered from 3.3 V. |
| Bus-Hold Current | ±750 μA max (VCC = 3.6 V) - reliably sustains logic state against noise or leakage without external biasing. |
| Ioff | ±100 μA (VCC = 0 V, VI/VO = 0–4.5 V) - prevents backflow current during hot-swap, protecting upstream drivers. |
Pinout & Package
SN74LVTH16244ADLR uses a 48-pin SSOP (DL) package, 15.89 mm × 7.49 mm body, 0.635 mm pitch, 1.75 mm max height. Pin 1 marked by beveled corner; pin numbering follows standard counter-clockwise sequence from top-left.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE–4OE | Active-low output-enable control | Each enables/disables one 4-bit buffer group independently; tied high via pullup for default disable during power-up. |
| 1A1–4A4 | Data inputs | 16 total inputs with integrated bus-hold; no external pullup/pulldown required for floating conditions. |
| 1Y1–4Y4 | True buffered outputs | Noninverting, 3-state outputs capable of driving 5-V TTL loads at 3.3-V VCC. |
| VCC, GND | Power supply terminals | Four VCC and four GND pins distributed across package - reduces switching noise and improves signal integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5-V input tolerance with 3.3-V VCC enables direct interface to legacy 5-V peripherals without level shifters. |
| Bus-hold on all data inputs | Eliminates need for 10-kΩ external pullup/pulldown resistors - reduces BOM count and PCB area in high-pin-count designs. |
| Ioff and power-up 3-state | Ensures high-impedance outputs during power sequencing - prevents bus contention in hot-pluggable modules and backplanes. |
| Low ground bounce (VOLP < 0.8 V) | Minimizes simultaneous switching noise in dense logic arrays - critical for stable timing in synchronous bus architectures. |
| Latch-up immunity > 500 mA | Meets JESD17 - withstands transient overvoltage events in industrial environments without destructive latch-up. |
Applications
| Backplane Bus Driver | Memory Address Buffer |
|---|---|
|
Use Scenario: Driving parallel address/data buses across multi-slot chassis with varying module insertion timing. IC Role / Device Role / Timing Role: 16-bit noninverting buffer isolating CPU address lines from backplane capacitance and noise. Use Value: Bus-hold maintains valid address state during slot insertion/removal; Ioff prevents backdrive into powered-down slots. |
Use Scenario: Buffering microcontroller address lines to SRAM or Flash memory with high fanout requirements. IC Role / Device Role / Timing Role: Level-shifting and fanout expansion for 16-bit address bus operating at 3.3-V core but interfacing 5-V memory devices. Use Value: 5-V tolerant inputs accept memory device status signals; 64-mA sink current drives 10+ TTL loads per output. |
| Industrial PLC I/O Module | Telecom Line Card Interface |
|
Use Scenario: Isolating field-side digital I/O signals from controller logic in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional bus buffer enabling safe read/write access to isolated I/O registers under EMI-heavy factory conditions. Use Value: Latch-up immunity >500 mA protects against surge-induced faults; wide temperature range (–40°C to 125°C) ensures reliability in uncooled enclosures. |
Use Scenario: Interfacing FPGA-based packet processing engines to legacy PHY devices on line cards. IC Role / Device Role / Timing Role: Timing-critical 3-state buffer synchronizing control signals between 3.3-V FPGA and 5-V transceiver ICs. Use Value: Sub-5 ns propagation delay preserves setup/hold margins; power-up 3-state avoids metastability during card reset sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16244ADGGR | Lower drive strength (24 mA sink), no bus-hold, 1.65–3.6 V VCC range. | Suitable for pure 3.3-V systems without 5-V interface needs; requires external pull resistors if inputs float. | Select when cost and power are prioritized over mixed-voltage robustness and bus-hold convenience. |
| SN74ALVC16244DLR | Higher speed (tPD ≈ 3.2 ns), same 3.3-V VCC, no bus-hold, ±24 mA drive. | Better for high-frequency clock distribution; lacks Ioff and bus-hold - unsuitable for hot-swap or undriven-bus scenarios. | Choose only when system guarantees always-driven inputs and strict timing closure demands sub-3.5 ns delay. |
Compared with SN74LVC16244ADGGR and SN74ALVC16244DLR, the SN74LVTH16244ADLR uniquely combines 5-V input tolerance, integrated bus-hold, and Ioff-enabled hot insertion - making it the sole option among these three for mixed-voltage backplane and modular system designs requiring zero external biasing and live-replaceable modules.
Availability
SN74LVTH16244ADLR is available at Aetrix Electronics and suitable for industrial PLCs, telecom line cards, embedded memory subsystems, and modular backplane systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVTH16244ADLR 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 leader delivering analog and embedded processing solutions, with over 50 years of innovation in logic, interface, and power management ICs.
The SN74LVTH16244ADLR belongs to TI's Widebus™ family of advanced ABT logic devices, engineered specifically for robust mixed-voltage interfacing, hot-insertion reliability, and noise-immune bus buffering in industrial and communications infrastructure.
FAQ
What is the maximum operating temperature for SN74LVTH16244ADLR?
The SN74LVTH16244ADLR is rated for operation from –40°C to +125°C ambient temperature, meeting industrial-grade thermal requirements. This specification is validated per TI's recommended operating conditions and applies to the DL-package variant used in the SN74LVTH16244ADLR part number. Thermal performance is further supported by θJA = 63°C/W for the SSOP package.
Does SN74LVTH16244ADLR support hot insertion?
Yes, SN74LVTH16244ADLR supports hot insertion via two integrated features: Ioff circuitry disables outputs when VCC = 0 V to prevent damaging current backflow, and power-up 3-state holds outputs in high-impedance during VCC ramp from 0 V to 1.5 V. These capabilities are explicitly verified in TI's datasheet SCBS142U and are inherent to the ABT process design of the SN74LVTH16244ADLR.
Can SN74LVTH16244ADLR interface directly with 5-V logic inputs?
Yes, SN74LVTH16244ADLR accepts 5-V input signals while operating at 3.3-V VCC. Its VIH threshold is specified at 2.0 V minimum, and absolute maximum input voltage is 5.5 V - allowing direct connection to 5-V TTL outputs without external level-shifting components. This mixed-mode capability is a defining feature of the SN74LVTH16244ADLR.
What package type does SN74LVTH16244ADLR use?
SN74LVTH16244ADLR uses a 48-pin SSOP (Shrink Small Outline Package), designated DL package by Texas Instruments. It measures 15.89 mm × 7.49 mm with 0.635 mm lead pitch and 1.75 mm maximum height. This package is RoHS-compliant, lead-finish NIPDAU, and MSL Level-1 rated for unlimited floor life at ≤30°C/60% RH.
Is bus-hold functionality enabled by default on SN74LVTH16244ADLR inputs?
Yes, bus-hold circuitry is permanently integrated on all 16 data inputs (1A1–4A4) of the SN74LVTH16244ADLR and requires no configuration or enable signal. It actively holds floating inputs at their last-valid logic state using ±750 μA dynamic current, eliminating the need for external pullup or pulldown resistors in the SN74LVTH16244ADLR design.
SN74LVTH16244ADLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVTH
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 32mA, 64mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
SN74LVTH16244ADLR FAQ
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6.How does Aetrix verify that SN74LVTH16244ADLR is sourced from the original manufacturer or authorized distributors?
All SN74LVTH16244ADLR 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 SN74LVTH16244ADLR meets industry standards.
7.What is the process for return or replacement of SN74LVTH16244ADLR?
All SN74LVTH16244ADLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVTH16244ADLR, 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 SN74LVTH16244ADLR part is unused and in its original packaging.
Return procedure for SN74LVTH16244ADLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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