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Texas Instruments SN74LVC2244APWRG4
- Part No.:
- SN74LVC2244APWRG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC2244APWRG4.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,313
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Product details
Overview
SN74LVC2244APWRG4 from Texas Instruments is an octal buffer/line driver with 3-state outputs, designed for 1.65 V to 3.6 V VCC operation. It features two independent 4-bit channels (1A–1Y and 2A–2Y), each with dedicated output-enable (1OE/2OE), supports 5.5 V-tolerant inputs, delivers ≤5.5 ns propagation delay at 3.3 V, and integrates 26-Ω series output resistors to suppress overshoot/undershoot - used in mixed-voltage I/O interfacing between 3.3 V microcontrollers and 5 V peripherals.
For engineers reviewing the SN74LVC2244APWRG4 datasheet, SN74LVC2244APWRG4 pinout, SN74LVC2244APWRG4 application, or SN74LVC2244APWRG4 equivalent, key selection criteria include its dual-channel 3-state drive capability, Ioff support for live insertion, ±12 mA output sink/source strength at 3.3 V, and compatibility with 1.65–3.6 V supply rails in space-constrained TSSOP-20 layouts.
Technical Context
The SN74LVC2244APWRG4 implements two independent 4-bit noninverting buffer sections, each controlled by a dedicated active-low output-enable input (1OE, 2OE). When enabled, signals pass from A-inputs to Y-outputs with CMOS-compatible thresholds; when disabled, outputs enter high-impedance state with Ioff protection enabling safe partial-power-down operation.
Its design incorporates on-die 26-Ω series termination per output, eliminating need for external resistors while reducing signal integrity issues like ringing and ground bounce (VOLP < 0.8 V, VOHV > 2 V at VCC = 3.3 V, TA = 25°C). Input tolerance up to 5.5 V allows direct interfacing with legacy 5 V logic without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - enables operation across low-voltage embedded systems including battery-powered wearables and industrial controllers. |
| Max tpd | 5.5 ns at VCC = 3.3 V - ensures timing-critical data paths meet sub-6 ns latency requirements in high-speed digital interfaces. |
| IOL/IOH | ±12 mA at VCC = 3.3 V - drives moderate capacitive loads (e.g., LEDs, bus lines) without external buffers. |
| Input Voltage Range | 0 V to 5.5 V - supports mixed-mode signaling: 5 V inputs safely interface with 3.3 V VCC without clamping diodes or external protection. |
| Ioff | ±10 μA at VCC = 0 V - prevents back-drive current during hot-swap or partial power-down, protecting upstream circuitry. |
| ESD Rating | 2000-V HBM, 1000-V CDM - meets industrial-grade robustness requirements for manufacturing and field deployment. |
Pinout & Package
TSSOP-20 package (6.50 mm × 4.40 mm body size, 0.65 mm pitch), lead-free NIPDAU finish, MSL Level-1 (unlimited floor life).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enable controls for Channel 1 and Channel 2 respectively; tied high via pullup for default high-Z during power sequencing. |
| 2, 4, 6, 8, 11, 13, 15, 17 | 1A1–1A4, 2A1–2A4 | Eight buffered input terminals - accept 0–5.5 V logic levels regardless of VCC setting. |
| 3, 5, 7, 9, 12, 14, 16, 18 | 1Y1–1Y4, 2Y1–2Y4 | Eight 3-state output terminals - each includes integrated 26-Ω series resistor to dampen edge-induced reflections. |
| 10 | GND | Ground reference for all logic and I/O; must be low-inductance connection to minimize ground bounce. |
| 20 | VCC | Primary power supply pin - requires local 0.1 μF bypass capacitor placed adjacent to pin for stable switching performance. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-bit channels | Enables separate control of two 4-line buses (e.g., address/data split, dual peripheral interfaces) without cross-talk or shared enable timing constraints. |
| Integrated 26-Ω output series resistance | Eliminates need for eight discrete series resistors, reducing BOM count and PCB area while maintaining signal integrity on unterminated traces. |
| 5.5 V-tolerant inputs | Allows direct connection to 5 V logic families (e.g., TTL, older microcontrollers) without external level translators in mixed-voltage systems. |
| Ioff partial-power-down protection | Prevents damaging current flow into powered-down sections during hot-plug events or staggered power sequencing in modular systems. |
| Low ground bounce (VOLP < 0.8 V) | Maintains noise margin in dense digital layouts where simultaneous switching outputs could otherwise corrupt adjacent logic states. |
Applications
| Wearable Health Sensor Hub | Industrial PLC I/O Module |
|---|---|
Use Scenario: Aggregating analog sensor data (ECG, SpO₂) from multiple 5 V ADCs into a 3.3 V ARM Cortex-M4 MCU with limited GPIO. IC Role / Device Role / Timing Role: Level-translating octal buffer isolating 5 V sensor domain from 3.3 V processing domain while preserving signal timing integrity. Use Value: Eliminates need for eight discrete level shifters; 5.5 V-tolerant inputs accept raw ADC outputs directly, and 26-Ω outputs reduce EMI in compact wearable PCBs. | Use Scenario: Driving eight 24 V discrete outputs (relays, indicators) via optocoupler inputs in a DIN-rail mounted controller. IC Role / Device Role / Timing Role: High-current 3-state buffer providing clean, slew-controlled logic-level signals to optocoupler LEDs. Use Value: ±12 mA drive strength ensures reliable LED turn-on; Ioff prevents backfeed during firmware updates or module replacement under power. |
| Network Switch Management Interface | Automated Test Equipment (ATE) Signal Conditioning |
Use Scenario: Interfacing a 3.3 V management CPU to legacy 5 V PHY status pins and configuration jumpers on multi-gigabit Ethernet switch ASICs. IC Role / Device Role / Timing Role: Bidirectional voltage translation buffer enabling readback of 5 V status bits and write control of 5 V strap options. Use Value: Single-chip solution replaces discrete MOSFET translators; 5.5 V input tolerance avoids damage from floating 5 V straps during initialization. | Use Scenario: Conditioning digital stimulus signals from a 3.3 V pattern generator before injection into DUTs operating at 5 V logic levels. IC Role / Device Role / Timing Role: Precision timing buffer adding controlled edge rate and impedance matching to test vectors. Use Value: 5.5 ns max tpd preserves nanosecond-scale timing margins; integrated 26-Ω resistors match typical 50 Ω test fixture impedances. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC244APWR | Same pinout, identical electrical specs, but lacks G4 suffix indicating RoHS-compliant packaging and enhanced moisture sensitivity rating (MSL-1 vs MSL-2 in some variants). | No functional difference in circuit operation; differs only in environmental compliance and reflow profile handling. | Select SN74LVC2244APWRG4 when full RoHS compliance and unlimited floor life (MSL-1) are required for high-reliability production. |
| 74LVC244ADTR2G | Identical function and pinout, but packaged in TSSOP-20 with different marking and tape/reel configuration (2500 pcs vs 2000 pcs); same NIPDAU finish and MSL-1 rating. | Drop-in compatible for volume procurement where distributor-specific packaging formats are preferred. | Choose 74LVC244ADTR2G when sourcing through ON Semiconductor distribution channels or requiring alternate reel quantities. |
Compared with SN74LVC244APWR and 74LVC244ADTR2G, SN74LVC2244APWRG4 offers identical core functionality but guarantees RoHS compliance, MSL-1 handling, and TI's long-term product continuity - critical for medical and industrial OEM programs requiring traceable, lifecycle-managed components.
Availability
SN74LVC2244APWRG4 is available at Aetrix Electronics and suitable for wearable health sensor hubs, industrial PLC I/O modules, and network switch management interfaces requiring stable component supply, consistent RoHS compliance, and guaranteed MSL-1 handling for automated SMT assembly.
Supply support for SN74LVC2244APWRG4 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 connectivity technologies, with decades of experience in logic IC design and high-volume manufacturing.
The SN74LVC2244APWRG4 belongs to TI's LVC (Low-Voltage CMOS) logic family, engineered for low-voltage, mixed-signal interfacing in portable, industrial, and communications equipment where power efficiency, signal integrity, and voltage translation are essential.
FAQ
What is the maximum operating temperature range for the SN74LVC2244APWRG4?
The SN74LVC2244APWRG4 is rated for operation from –40°C to +125°C ambient temperature. This extended range supports deployment in harsh environments such as industrial control cabinets and automotive under-hood modules. The device maintains specified electrical performance-including tpd, VOH, and VOL-across this full range, as validated in TI's SCAS572L datasheet switching characteristics tables.
Does the SN74LVC2244APWRG4 require external pull-up resistors on its OE pins?
Yes - to ensure outputs remain in high-impedance state during power-up/power-down, SN74LVC2244APWRG4 OE pins (1OE and 2OE) should be tied to VCC via pull-up resistors. TI recommends minimum values based on driver sink capability; typical values range from 4.7 kΩ to 10 kΩ. Leaving OE floating risks undefined output states and potential bus contention, as confirmed in Section 10.1 of the SN74LVC2244APWRG4 datasheet.
Can the SN74LVC2244APWRG4 drive LEDs directly?
Yes - the SN74LVC2244APWRG4 can drive standard indicator LEDs directly when configured as a low-side sink (Y-output to LED anode, cathode to VCC). Each output supports up to 12 mA sink current at 3.3 V, sufficient for most 2 mA–10 mA LEDs. However, current-limiting resistors must still be used to set forward current, and total device current must stay within ±50 mA limit per VCC/GND pair, as specified in Section 7.1 Absolute Maximum Ratings.
Is the SN74LVC2244APWRG4 pin-compatible with older 74-series logic devices?
No - the SN74LVC2244APWRG4 uses a modern TSSOP-20 footprint and dual-channel architecture distinct from legacy 74244 (SOIC-20) pinouts. While functionally equivalent to 74LVC244, its pin mapping differs: OE pins are at positions 1 and 19, not shared; and Y/A assignments follow TI's optimized layout (e.g., 1Y1 at Pin 3, not Pin 3 of 74244). Always verify against the DB/PW package pin diagram in Figure 1 of the SN74LVC2244APWRG4 datasheet.
What is the purpose of the 26-Ω series resistance integrated into each output of the SN74LVC2244APWRG4?
The 26-Ω series resistance integrated into each SN74LVC2244APWRG4 output serves as on-die source termination to dampen signal reflections caused by fast edges driving unterminated or lightly loaded PCB traces. This reduces overshoot (VOHV > 2 V) and ground bounce (VOLP < 0.8 V), improving signal integrity without requiring eight external resistors - a key benefit confirmed in the "Features" and "Detailed Description" sections of the SN74LVC2244APWRG4 datasheet.
SN74LVC2244APWRG4 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:
- Discontinued at Digi-Key
- 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
SN74LVC2244APWRG4 FAQ
1.How can I place an order for SN74LVC2244APWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC2244APWRG4 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 SN74LVC2244APWRG4 reliable?
The price and inventory of SN74LVC2244APWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC2244APWRG4 is usually 5 days.
3.What payment methods are accepted for SN74LVC2244APWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC2244APWRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC2244APWRG4?
SN74LVC2244APWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC2244APWRG4 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 SN74LVC2244APWRG4?
For technical support, including SN74LVC2244APWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC2244APWRG4 requirements.
6.How does Aetrix verify that SN74LVC2244APWRG4 is sourced from the original manufacturer or authorized distributors?
All SN74LVC2244APWRG4 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 SN74LVC2244APWRG4 meets industry standards.
7.What is the process for return or replacement of SN74LVC2244APWRG4?
All SN74LVC2244APWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC2244APWRG4, 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 SN74LVC2244APWRG4 part is unused and in its original packaging.
Return procedure for SN74LVC2244APWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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