My Inquiry
My Account
Texas Instruments SN74LVT244AN
- Part No.:
- SN74LVT244AN
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
SN74LVT244AN.pdf
- Description:
- BUFFER/LINE DRIVER 8-CH NON-INVE
- Quantity:
- Payment:
- Shipping:
Inventory:12,795
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74LVT244AN from Texas Instruments is an octal 3-state buffer/driver IC designed for 3.3-V ABT logic operation with mixed-mode (5-V input-tolerant) interface capability. It features two independent 4-bit channels, bus-hold inputs, ±64-mA output drive, and operates from 2.7 V to 3.6 V - used in backplane buffering and 3.3-V/5-V level translation in industrial control systems.
For engineers reviewing the SN74LVT244AN datasheet, SN74LVT244AN pinout, SN74LVT244AN application, or SN74LVT244AN equivalent, key selection criteria include 3-state timing (tPZH ≤ 6.3 ns), bus-hold current (±75 µA), output drive strength (IOL = 64 mA), and DB-package thermal dissipation (0.6 W at TA = 55°C).
Technical Context
The SN74LVT244AN implements Advanced BiCMOS Technology (ABT) for low-static power and high-speed 3-state operation. Its dual 4-bit architecture uses separate OE# controls per group (1OE, 2OE), enabling independent channel enable/disable with no internal contention.
Bus-hold circuitry actively maintains valid logic levels on floating A-inputs without external pullups. Output ground bounce (VOLP < 0.8 V) and latch-up immunity (>500 mA per JESD-17) are specified for robust board-level reliability in hot-swap and mixed-voltage environments.
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 with stable logic thresholds. |
| IOL / IOH | 64 mA / –32 mA - drives heavy capacitive loads (e.g., 50-pF buses) while maintaining VOL ≤ 0.55 V and VOH ≥ 2.0 V. |
| tPZH / tPLZ | 5.2 ns / 5.6 ns max at VCC = 3.3 V - enables sub-6-ns 3-state enable/disable for high-throughput data gating. |
| Bus-Hold Current | ±75 µA at VI = 0.8 V / 2.0 V - eliminates need for external pullup/pulldown resistors on unused inputs. |
| Input Voltage Tolerance | VI up to 5.5 V - allows direct connection to 5-V TTL outputs without level-shifting circuitry. |
| ICC (Active) | 12 mA max at VCC = 3.6 V - low active power enables use in power-constrained embedded interfaces. |
Pinout & Package
SN74LVT244AN is packaged in a 20-pin plastic DIP (N package), with 0.3-inch body width and through-hole mounting. Pin spacing follows standard 0.1-inch grid.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE#, 2OE# | Active-low output-enable controls for Group 1 (pins 2–5, 18–15) and Group 2 (pins 11–14, 7–4). |
| 2–5, 18–15 | 1A1–1A4, 1Y1–1Y4 | Group 1 data inputs and true outputs; non-inverting path with 3-state control via 1OE#. |
| 11–14, 7–4 | 2A1–2A4, 2Y1–2Y4 | Group 2 data inputs and true outputs; independent 4-bit channel controlled by 2OE#. |
| 10, 20 | GND, VCC | Power reference and supply pins; decoupling required within 1 cm of VCC/GND for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage tolerance | 5-V input-compatible with 3.3-V VCC - enables direct interfacing between legacy 5-V logic and modern low-voltage systems. |
| Integrated bus-hold | Eliminates external pullup resistors on all A-inputs - reduces BOM count and PCB area in sparse-bus applications. |
| Live insertion support | Robust ESD protection and controlled output turn-on/off - permits safe hot-plug operation in modular backplane systems. |
| Low ground bounce | VOLP < 0.8 V at VCC = 3.3 V - minimizes switching noise coupling into shared ground planes during parallel output transitions. |
Applications
| Industrial Backplane Buffering | 3.3-V/5-V Level Translation |
|---|---|
Use Scenario: Driving multiple slots on a 16-bit ISA-style backplane where master controller runs at 5 V and peripheral modules operate at 3.3 V. IC Role / Device Role / Timing Role: Bidirectional voltage-tolerant buffer isolating domains while preserving signal integrity and timing margins. Use Value: Enables single-chip level translation without external resistors or dedicated level shifters, reducing interconnect delay (tPLH ≤ 4.1 ns). | Use Scenario: Interfacing a 5-V microcontroller GPIO bank to a 3.3-V FPGA configuration bus during system boot. IC Role / Device Role / Timing Role: Unidirectional input translator with bus-hold holding default state during reset sequencing. Use Value: Prevents floating inputs during power-up; tolerates 5.5-V VI while sourcing/sinking 64-mA IOL for fast edge rates. |
| Hot-Swappable Module Interface | Legacy System Bus Extension |
Use Scenario: Enabling live insertion of daughter cards into a telecom shelf with shared 3.3-V data bus and 5-V management lines. IC Role / Device Role / Timing Role: 3-state driver with controlled output disable timing (tPZL ≤ 5.6 ns) to prevent bus contention during plug-in. Use Value: Meets JEDEC JESD-17 latch-up immunity (>500 mA) and supports hot-swap without external protection circuitry. | Use Scenario: Extending a vintage 5-V CPU bus to add modern low-power peripherals using 3.3-V logic. IC Role / Device Role / Timing Role: Octal buffer providing fanout and voltage-domain isolation between legacy and new subsystems. Use Value: Delivers 64-mA drive into 50-pF loads while maintaining VOL ≤ 0.55 V - ensures noise margin > 0.7 V at 3.3-V logic levels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVTH244A | Lower ICC (8 mA max), same pinout, but no bus-hold - requires external pullups on unused inputs. | Used where lower static power is prioritized over BOM simplification; not suitable for floating-input scenarios. | Select when board space allows discrete pullups and total system ICC budget is constrained below 10 mA. |
| 74ALVC244 | 3.3-V only (no 5-V input tolerance), higher speed (tPLH = 2.8 ns), smaller PW package option. | Preferred for pure 3.3-V designs requiring faster propagation and minimal footprint; incompatible with 5-V signal sources. | Choose when interfacing exclusively with 3.3-V logic and layout density is critical - avoid if 5-V signals are present. |
Compared with SN74LVTH244A and 74ALVC244, the SN74LVT244AN uniquely combines 5-V input tolerance, integrated bus-hold, and DIP packaging - making it optimal for legacy system upgrades and industrial backplanes where reliability and design simplicity outweigh ultra-low power or minimal size requirements.
Availability
SN74LVT244AN is available at Aetrix Electronics and suitable for industrial backplane buffering, 3.3-V/5-V level translation, and hot-swappable module interface applications requiring stable component supply across extended temperature ranges (–40°C to 85°C).
Supply support for SN74LVT244AN 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 founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The SN74LVT244AN belongs to TI's LVT (Low-Voltage BiCMOS Technology) logic family, engineered for mixed-voltage system interoperability and high-noise-immunity 3-state bus driving in demanding industrial environments.
FAQ
What is the maximum operating temperature range for the SN74LVT244AN?
The SN74LVT244AN is characterized for operation from –40°C to +85°C. This commercial-grade temperature range supports deployment in industrial control panels, factory automation equipment, and telecom infrastructure where ambient temperatures remain within this envelope. The SN74LVT244AN does not meet military-spec temperature requirements - those are fulfilled by the SN54LVT244A variant rated from –55°C to +125°C.
Does the SN74LVT244AN require external pullup resistors on its inputs?
No, the SN74LVT244AN includes active bus-hold circuitry on all A-inputs, which maintains valid logic states on unused or floating inputs without external components. Each input draws ±75 µA at hold thresholds (VI = 0.8 V or 2.0 V), eliminating the need for pullup/pulldown resistors and reducing BOM cost and PCB area - a key advantage over alternatives like the SN74LVTH244A.
Can the SN74LVT244AN safely interface with 5-V logic outputs?
Yes, the SN74LVT244AN supports mixed-mode signal operation: its inputs tolerate up to 5.5 V regardless of VCC, allowing direct connection to 5-V TTL outputs while powered from a 3.3-V supply. This capability is explicitly confirmed in the recommended operating conditions table and enables seamless integration into hybrid-voltage systems without external level-shifting circuitry.
What is the output drive capability of the SN74LVT244AN at 3.3-V supply?
At VCC = 3.3 V, the SN74LVT244AN delivers 64 mA sink current (IOL) and –32 mA source current (IOH) per output. These values ensure robust driving of 50-pF transmission lines and multiple CMOS inputs while maintaining VOL ≤ 0.55 V and VOH ≥ 2.0 V - meeting timing and noise-margin requirements for high-speed backplane and bus-extension applications.
Is the SN74LVT244AN pin-compatible with other octal buffer packages?
The SN74LVT244AN in the 20-pin plastic DIP (N) package shares identical pinout and functionality with SN74LVT244A variants in DW, DB, and PW packages - all follow the same logic diagram and terminal assignment. However, mechanical compatibility with socketed DIP layouts is exclusive to the N package; surface-mount variants require different footprints and reflow profiles.
SN74LVT244AN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SN74LVT244AN FAQ
1.How can I place an order for SN74LVT244AN through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVT244AN 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 SN74LVT244AN reliable?
The price and inventory of SN74LVT244AN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVT244AN is usually 5 days.
3.What payment methods are accepted for SN74LVT244AN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVT244AN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVT244AN?
SN74LVT244AN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVT244AN 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 SN74LVT244AN?
For technical support, including SN74LVT244AN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVT244AN requirements.
6.How does Aetrix verify that SN74LVT244AN is sourced from the original manufacturer or authorized distributors?
All SN74LVT244AN 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 SN74LVT244AN meets industry standards.
7.What is the process for return or replacement of SN74LVT244AN?
All SN74LVT244AN units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVT244AN, 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 SN74LVT244AN part is unused and in its original packaging.
Return procedure for SN74LVT244AN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74LVT244AN Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
