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Texas Instruments SN74LVC2244APWT
- Part No.:
- SN74LVC2244APWT
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC2244APWT.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:700
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Product details
Overview
SN74LVC2244APWT from Texas Instruments is an octal noninverting buffer/driver with 3-state outputs, designed for 1.65-V to 3.6-V VCC operation. It features two independent 4-bit sections (1A–1Y and 2A–2Y), each with dedicated output-enable (OE) control, 5.5 ns max propagation delay at 3.3 V, 26-Ω integrated output series resistance, and 5.5-V tolerant inputs - enabling use in mixed-voltage 3.3-V/5-V system interfacing, such as microcontroller I/O expansion in industrial PLC modules.
For engineers reviewing the SN74LVC2244APWT datasheet, SN74LVC2244APWT pinout, SN74LVC2244APWT application, or SN74LVC2244APWT equivalent, key selection criteria include its dual 4-bit 3-state architecture, Ioff support for live insertion and partial power-down, ±12 mA output drive capability per channel, and guaranteed operation across –40°C to 85°C ambient temperature.
Technical Context
The SN74LVC2244APWT implements a CMOS-based dual 4-bit buffer structure with separate OE controls (1OE on Pin 1, 2OE on Pin 19), allowing independent enable/disable of each 4-bit group. Its outputs enter high-impedance state when OE is high, and pass A-inputs to Y-outputs when OE is low - confirmed by the function table and simplified schematic.
It supports mixed-mode signal operation: inputs tolerate up to 5.5 V regardless of VCC (1.65–3.6 V), enabling level translation without external components. The integrated 26-Ω series output resistance reduces overshoot/undershoot, eliminating need for external termination resistors in point-to-point routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - enables direct integration into 3.3-V logic systems and compatibility with low-power 1.8-V domains. |
| Max tpd | 5.5 ns at VCC = 3.3 V - supports high-speed data buffering in timing-critical digital interfaces like address/data bus drivers. |
| Input Voltage Tolerance | Up to 5.5 V - allows safe connection to 5-V legacy peripherals without level-shifting circuitry. |
| Ioff Support | Active at VCC = 0 V - prevents back-drive current during hot-plug or partial power-down, protecting upstream logic. |
| Output Drive | ±12 mA per output at VCC = 3.0 V - sufficient to directly drive LEDs, small relays, or multiple CMOS loads (fan-out ≥ 20). |
| ESD Protection | 2000-V HBM, 1000-V CDM - exceeds JEDEC standards for robust handling in automated assembly and field environments. |
| Operating Temperature | –40°C to +85°C - qualified for industrial control, test equipment, and network infrastructure applications. |
Pinout & Package
TSSOP-20 package (PW), body size 6.50 mm × 4.40 mm, 0.65-mm pitch, exposed pad not present, moisture sensitivity level (MSL) 1 - suitable for standard reflow without baking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enable inputs - independently disable Group 1 (Pins 2,4,6,8 → 18,16,14,12) or Group 2 (Pins 11,13,15,17 → 9,7,5,3). |
| 2,4,6,8,11,13,15,17 | 1A1–1A4, 2A1–2A4 | Buffer input terminals - accept 5.5-V-tolerant logic signals; internally clamped to protect core logic. |
| 3,5,7,9,12,14,16,18 | 2Y4–2Y1, 1Y4–1Y1 | 3-state output terminals - sink/source up to ±12 mA; feature built-in 26-Ω series resistance to dampen edge-induced ringing. |
| 10 | GND | Ground reference for all I/O and internal circuitry - must be low-impedance connection to minimize ground bounce (VOLP < 0.8 V typical). |
| 20 | VCC | Power supply pin - requires local 0.1-μF bypass capacitor; supports simultaneous operation across full 1.65–3.6-V range. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 26-Ω Output Series Resistance | Eliminates need for external termination resistors, reducing BOM count and PCB area in high-speed digital interconnects. |
| Ioff Partial-Power-Down Protection | Prevents damaging current flow when VCC = 0 V, enabling safe hot-swap in modular backplane and field-replaceable unit designs. |
| 5.5-V Input Tolerance | Enables direct interface between 3.3-V logic and 5-V peripherals (e.g., legacy sensors, displays) without external translators. |
| Low Ground Bounce (VOLP) | <0.8 V at VCC = 3.3 V, TA = 25°C - maintains signal integrity during simultaneous switching of multiple outputs. |
| High-Speed Switching | 5.5 ns max tpd at 3.3 V - meets timing budgets for 100-MHz+ bus applications including memory address latching and FPGA I/O expansion. |
Applications
| Industrial PLC I/O Expansion | Wearable Health Sensor Hub |
|---|---|
Use Scenario: Expanding microcontroller GPIO count to drive discrete indicators, relay coils, and analog multiplexer control lines in compact programmable logic controllers. IC Role / Device Role / Timing Role: Octal buffer providing isolated, high-drive 3-state outputs with independent enable control per group - decoupling MCU timing from load switching transients. Use Value: Integrated 26-Ω output resistance suppresses EMI from relay coil flyback and LED turn-on edges, reducing need for ferrite beads or RC snubbers. |
Use Scenario: Interfacing ultra-low-power MCU (1.8 V) with 5-V biopotential sensor ICs and OLED display drivers in fitness bands. IC Role / Device Role / Timing Role: Level-translating buffer enabling bidirectional signal integrity across voltage domains while maintaining sub-10 ns timing margins. Use Value: 5.5-V input tolerance and Ioff allow safe connection to powered sensors during MCU sleep cycles, eliminating risk of back-powering the 1.8-V rail. |
| Network Switch Management Interface | Automated Test Equipment (ATE) Signal Conditioning |
Use Scenario: Driving status LEDs, fan control PWM signals, and EEPROM write-enable lines in 1U rack-mounted Ethernet switches. IC Role / Device Role / Timing Role: Dual-group 3-state driver isolating management MCU from noisy power delivery circuits - OE pins synchronized to reset sequences. Use Value: Guaranteed –40°C to +85°C operation ensures reliability in thermally constrained switch chassis; low ICC (10 μA max) minimizes standby power draw. |
Use Scenario: Buffering precision DAC outputs and multiplexing test stimulus signals to DUT pins in semiconductor validation systems. IC Role / Device Role / Timing Role: High-fanout, low-propagation-delay driver ensuring sub-nanosecond skew across 8 parallel test channels. Use Value: 5.5 ns tpd and <0.8 V VOLP maintain signal fidelity during fast edge transitions required for high-speed digital pattern generation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC244APWR | TSSOP-20 package, identical electrical specs and pinout; differs only in tape-and-reel quantity (2000 vs. 250 units) and MSL marking (Level-1 vs. Level-1). | No functional difference - interchangeable in design; preferred for high-volume production due to larger reel size. | Select SN74LVC244APWR for cost-optimized manufacturing runs; SN74LVC2244APWT suits prototyping and low-volume builds requiring smaller reels. |
| 74LVC244ADTR2G | SOIC-20 package (12.8 mm × 7.5 mm), same logic function and VCC range, but lacks 5.5-V input tolerance (max VI = VCC + 0.3 V) and has higher tpd (7.5 ns). | Not suitable for mixed 3.3-V/5-V interfacing; limited to single-supply 3.3-V systems where board space permits larger SOIC footprint. | Choose 74LVC244ADTR2G only if PCB layout constraints favor SOIC and no 5-V signal translation is required. |
Compared with SN74LVC2244APWT, SN74LVC244APWR offers identical performance in a more production-friendly reel format, while 74LVC244ADTR2G trades voltage flexibility and speed for legacy SOIC compatibility - making SN74LVC2244APWT optimal for space-constrained, mixed-voltage embedded designs.
Availability
SN74LVC2244APWT is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, wearable health sensor hubs, and network switch management interfaces requiring stable component supply, consistent MSL-1 handling, and traceable lot-level documentation.
Supply support for SN74LVC2244APWT 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 specializing in analog, embedded processing, and logic solutions, with over 50 years of innovation in high-reliability digital interface ICs.
The SN74LVC2244APWT belongs to TI's LVC (Low-Voltage CMOS) logic family, engineered for robust 1.65–3.6-V operation with enhanced noise immunity, mixed-voltage interoperability, and industrial-grade thermal performance.
FAQ
What is the maximum input voltage rating for SN74LVC2244APWT?
The SN74LVC2244APWT supports input voltages up to 5.5 V regardless of VCC level (1.65–3.6 V), enabling safe interfacing with 5-V peripherals without external level shifters. This is explicitly specified in the Recommended Operating Conditions table under "VI Input voltage" and verified in Absolute Maximum Ratings.
Does SN74LVC2244APWT support hot-swap or live-insertion applications?
Yes, SN74LVC2244APWT includes Ioff circuitry that disables inputs and outputs when VCC = 0 V, preventing back-current flow during hot-plug events. This feature is documented in the Features list and Detailed Description section, and supports partial-power-down mode per JESD78 requirements.
What is the output drive strength of SN74LVC2244APWT at 3.3 V?
At VCC = 3.3 V, SN74LVC2244APWT delivers ±12 mA per output (IOH = –12 mA, IOL = 12 mA) under recommended conditions. This is confirmed in Table 7.5 (Electrical Characteristics) and supports driving multiple CMOS loads or moderate-current peripherals like LEDs and small relays.
Is SN74LVC2244APWT pin-compatible with other octal buffers in the LVC family?
SN74LVC2244APWT shares identical pinout and functionality with SN74LVC244A variants (e.g., SN74LVC244APWR), differing only in packaging and reel configuration. However, it is not pin-compatible with SN74LVC240A (inverting) or SN74LVC125A (quad) due to different channel count and logic inversion behavior.
What thermal performance can be expected from SN74LVC2244APWT in a TSSOP-20 package?
In the TSSOP-20 (PW) package, SN74LVC2244APWT has a junction-to-ambient thermal resistance (RθJA) of 102.5°C/W, as specified in the Thermal Information table. This value assumes standard JEDEC 2S2P board layout; actual thermal performance improves with copper pour and thermal vias beneath the package body.
SN74LVC2244APWT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 12mA, 12mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74LVC2244APWT FAQ
1.How can I place an order for SN74LVC2244APWT through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC2244APWT 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 SN74LVC2244APWT reliable?
The price and inventory of SN74LVC2244APWT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC2244APWT is usually 5 days.
3.What payment methods are accepted for SN74LVC2244APWT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC2244APWT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC2244APWT?
SN74LVC2244APWT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC2244APWT 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 SN74LVC2244APWT?
For technical support, including SN74LVC2244APWT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC2244APWT requirements.
6.How does Aetrix verify that SN74LVC2244APWT is sourced from the original manufacturer or authorized distributors?
All SN74LVC2244APWT 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 SN74LVC2244APWT meets industry standards.
7.What is the process for return or replacement of SN74LVC2244APWT?
All SN74LVC2244APWT units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC2244APWT, 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 SN74LVC2244APWT part is unused and in its original packaging.
Return procedure for SN74LVC2244APWT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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