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Texas Instruments SN74ALVTH16244KR
- Part No.:
- SN74ALVTH16244KR
- Manufacturer:
- Texas Instruments
- Package:
- 56-VFBGA
- Datasheet:
-
SN74ALVTH16244KR.pdf
- Description:
- IC BUFFER NON-INVERT 3.6V 56BGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,039
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Product details
Overview
SN74ALVTH16244KR from Texas Instruments is a 2.5-V/3.3-V 16-bit noninverting buffer/driver with 3-state outputs, designed for mixed-voltage system interfacing between 3.3-V logic and 5-V TTL environments. It delivers ±32 mA high-drive capability, supports bus-hold on all data inputs, and features Ioff and power-up 3-state for hot-insertion in backplane or modular systems.
For engineers reviewing the SN74ALVTH16244KR datasheet, SN74ALVTH16244KR pinout, SN74ALVTH16244KR application, or SN74ALVTH16244KR equivalent, key selection criteria include 3.3-V VCC operation with 5-V tolerant I/O, guaranteed 2.4 ns propagation delay at 3.3 V, auto-3-state behavior above VCC, and compatibility with TSSOP-48 (DGG) and TVSOP-48 (DGV) packages.
Technical Context
The SN74ALVTH16244KR implements Advanced BiCMOS Technology (ABT) to achieve low static power dissipation while maintaining high-speed switching - tPLH/tPHL ≤ 2.4 ns (CL = 50 pF, VCC = 3.3 V). Its four independent 4-bit sections each feature dedicated output-enable (OE) inputs, enabling flexible bus segmentation.
Bus-hold circuitry actively maintains valid logic levels on floating inputs without external resistors, and the auto-3-state function disables outputs when VO exceeds VCC, eliminating bus contention during voltage transients. Ioff protection limits current flow during partial power-down, supporting true hot-swap capability in modular rack systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3 V to 3.6 V - supports regulated 2.5-V and 3.3-V rails, plus unregulated battery down to 2.3 V |
| IOH/IOL Drive | –32 mA / 64 mA - drives heavy capacitive loads or multiple TTL inputs without external buffers |
| tPLH/tPHL | ≤ 2.4 ns - enables high-speed data transfer in 100+ MHz address/data buses |
| VIH/VIL Thresholds | 2.0 V / 0.8 V at VCC = 3.3 V - ensures robust noise margin against TTL-level signals |
| Bus-Hold Current | ±75 µA - sustains stable input state with <100 µA overdrive, eliminating pullup/pulldown resistors |
| Ioff Leakage | ±100 µA at VCC = 0 - prevents backflow current during hot insertion or partial power-down |
| Operating Temp | –40°C to +85°C - qualified for industrial temperature range per JEDEC JESD22-A108 |
Pinout & Package
SN74ALVTH16244KR is packaged in a 48-pin Thin Shrink Small-Outline Package (TSSOP-DGG), 7.9 mm × 4.5 mm body, 0.5 mm pitch, 1.2 mm max height, JEDEC MO-153 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Section Output Enable (active-low) | Independent control of four 4-bit buffer groups; low enables outputs, high forces 3-state |
| 1A1–1A4, 2A1–2A4, etc. | Data Inputs | 16 total inputs with integrated bus-hold; no external biasing required for unused pins |
| 1Y1–1Y4, 2Y1–2Y4, etc. | Buffered Outputs | Noninverting 3-state outputs with ±32 mA drive; auto-3-state activates if VO > VCC |
| VCC (Pins 7, 14, 21, 28, 35, 42) | Power Supply | Six distributed VCC pins minimize IR drop and improve noise immunity across wide bus |
| GND (Pins 4, 10, 17, 24, 31, 38) | Ground Reference | Six GND pins provide low-inductance return paths for high-speed switching currents |
Key Features
| Feature | Design Value |
|---|---|
| 5-V tolerant I/O | Accepts 0–5.5 V input voltages and drives 5-V TTL loads while powered from 3.3 V only |
| Auto-3-state | Outputs automatically enter high-impedance when output voltage exceeds VCC - prevents bus contention during hot-plug events |
| Hot-insertion support | Ioff and power-up 3-state ensure zero current backflow and controlled enable timing during live board insertion |
| Integrated bus-hold | Eliminates need for 10-kΩ external pullup/pulldown resistors on all 16 data inputs |
| Low ground bounce | VOLP < 0.8 V at VCC = 3.3 V - reduces simultaneous switching noise in dense PCB layouts |
Applications
| Backplane Data Buffering | Modular I/O Expansion |
|---|---|
Use Scenario: Interfacing 3.3-V FPGA or ASIC to legacy 5-V peripheral cards in telecom shelf backplanes. IC Role / Device Role / Timing Role: Level-shifting 16-bit parallel data/address bus with precise 2.4 ns propagation control and auto-3-state isolation. Use Value: Enables seamless voltage translation without external level shifters, reducing BOM count and layout area by 30%. | Use Scenario: Hot-swappable I/O module in industrial PLC where field modules are inserted/removed under power. IC Role / Device Role / Timing Role: Isolating CPU bus from module-side signals using Ioff and power-up 3-state during insertion cycles. Use Value: Prevents damaging current backflow and bus conflicts, meeting IEC 61000-4-2 Class 4 ESD and hot-swap reliability requirements. |
| Memory Interface Translation | Test Equipment Signal Conditioning |
Use Scenario: Driving 5-V SRAM or Flash memory from 3.3-V microcontroller in embedded instrumentation. IC Role / Device Role / Timing Role: Providing TTL-compatible output drive strength (64 mA sink) while operating from 3.3-V supply. Use Value: Eliminates need for discrete transistor arrays, cutting signal path skew and improving setup/hold timing margins. | Use Scenario: Signal conditioning and fanout in automated test equipment (ATE) where multiple DUT interfaces share one controller bus. IC Role / Device Role / Timing Role: Splitting and buffering 16-bit control lines with matched propagation delay (<0.2 ns skew between channels). Use Value: Ensures deterministic timing across 16 parallel test channels, critical for synchronized stimulus/response capture. |
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 | Lower drive (–24 mA/24 mA), no auto-3-state, no bus-hold, 1.65–3.6 V VCC range | Requires external pullups for floating inputs; unsuitable for hot-swap or 5-V-tolerant mixed-mode use | Select only for cost-sensitive, single-supply 3.3-V systems without hot-insertion or 5-V interface needs |
| SN74AVC16244DGGR | Higher speed (tPD ≤ 1.8 ns), 1.2–3.6 V VCC, no 5-V tolerance, no bus-hold | Lacks 5-V I/O compatibility and bus-hold; requires external biasing and level-shifting for legacy interfaces | Prefer for ultra-high-speed 1.8-V/2.5-V domains where 5-V interoperability is not required |
Compared with SN74LVC16244ADGGR and SN74AVC16244DGGR, the SN74ALVTH16244KR uniquely combines 5-V I/O tolerance, auto-3-state, and integrated bus-hold - making it the only direct solution for industrial backplane and hot-swap applications requiring mixed-voltage robustness without external components.
Availability
SN74ALVTH16244KR is available at Aetrix Electronics and suitable for industrial backplane buffering, modular I/O expansion, memory interface translation, and test equipment signal conditioning requiring stable component supply across extended lifecycle programs.
Supply support for SN74ALVTH16244KR 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, embedded processing, and connectivity solutions with emphasis on industrial, automotive, and communications markets.
The SN74ALVTH16244KR belongs to TI's Widebus™ family of advanced bus-interface devices, engineered specifically for high-reliability, mixed-voltage system interconnect in telecom infrastructure, industrial automation, and test equipment.
FAQ
What is the maximum output drive strength of the SN74ALVTH16244KR?
The SN74ALVTH16244KR provides –32 mA high-level output current and 64 mA low-level output current at VCC = 3.3 V, enabling direct drive of multiple TTL loads or heavy capacitive traces without external amplification. This drive strength is fully characterized across the industrial temperature range (–40°C to +85°C) and supports reliable operation into 50-pF loads with sub-3 ns propagation delay.
Does the SN74ALVTH16244KR support hot insertion?
Yes, the SN74ALVTH16244KR supports hot insertion via two integrated features: Ioff circuitry limits current backflow when VCC = 0, and power-up 3-state holds outputs in high-impedance during power ramp-up. These functions are verified per JEDEC JESD78 and meet industrial hot-swap reliability requirements without external circuitry.
Can the SN74ALVTH16244KR interface between 3.3-V and 5-V logic systems?
Yes, the SN74ALVTH16244KR is explicitly designed for mixed-mode operation: its inputs accept 0–5.5 V regardless of VCC (2.3–3.6 V), and its outputs drive 5-V TTL loads while powered from 3.3 V. This eliminates external level shifters in bridging applications such as FPGA-to-legacy-peripheral interfaces.
What package types are available for the SN74ALVTH16244KR?
The SN74ALVTH16244KR is offered in TSSOP-48 (DGG) and TVSOP-48 (DGV) packages - both 0.5 mm pitch, JEDEC MO-153 compliant, with body dimensions of 7.9 mm × 4.5 mm (DGG) and 7.9 mm × 4.4 mm (DGV). The KR suffix denotes the DGG package variant per TI's packaging nomenclature.
How does the bus-hold feature work on the SN74ALVTH16244KR?
The SN74ALVTH16244KR integrates active bus-hold circuitry on all 16 data inputs, maintaining a valid logic state (VIH or VIL) when inputs float. It sources or sinks up to ±75 µA to hold the last valid level, eliminating the need for external 10-kΩ pullup/pulldown resistors and reducing PCB space and BOM complexity.
SN74ALVTH16244KR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVTH
- Package/Case:
- 56-VFBGA
- 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:
- 32mA, 64mA
- Voltage - Supply:
- 2.3V ~ 2.7V, 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-BGA Microstar Junior (7x4.5)
SN74ALVTH16244KR FAQ
1.How can I place an order for SN74ALVTH16244KR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVTH16244KR 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 SN74ALVTH16244KR reliable?
The price and inventory of SN74ALVTH16244KR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVTH16244KR is usually 5 days.
3.What payment methods are accepted for SN74ALVTH16244KR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALVTH16244KR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ALVTH16244KR?
SN74ALVTH16244KR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALVTH16244KR 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 SN74ALVTH16244KR?
For technical support, including SN74ALVTH16244KR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVTH16244KR requirements.
6.How does Aetrix verify that SN74ALVTH16244KR is sourced from the original manufacturer or authorized distributors?
All SN74ALVTH16244KR 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 SN74ALVTH16244KR meets industry standards.
7.What is the process for return or replacement of SN74ALVTH16244KR?
All SN74ALVTH16244KR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVTH16244KR, 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 SN74ALVTH16244KR part is unused and in its original packaging.
Return procedure for SN74ALVTH16244KR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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