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Texas Instruments SN74ALVC244PW
- Part No.:
- SN74ALVC244PW
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74ALVC244PW.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,639
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Product details
Overview
SN74ALVC244PW from Texas Instruments is an octal buffer/driver with 3-state outputs, designed for 1.65 V to 3.6 V operation. It features two independent 4-bit channels, each with separate output-enable (OE) inputs, ±24-mA drive strength at 3.3 V, 2.8 ns max propagation delay, and ESD protection exceeding JESD 22 standards. It is used in bidirectional bus interfacing and level translation between mixed-voltage logic systems.
For engineers reviewing the SN74ALVC244PW datasheet, SN74ALVC244PW pinout, SN74ALVC244PW application, or SN74ALVC244PW equivalent, this page delivers verified electrical specs, TSSOP-20 package details, functional behavior under VCC=1.65–3.6 V, 3-state control timing, and real-world interface use cases - all confirmed against TI's SCES188G revision October 2004 production data sheet.
Technical Context
The SN74ALVC244PW implements dual 4-bit non-inverting buffers with independent 3-state control per group. Each channel passes data from A inputs to Y outputs when its OE is low; outputs enter high-impedance state when OE is high. Input thresholds scale with VCC (VIH = 0.65×VCC min at 1.65 V, 2.0 V min at 3.6 V), enabling robust operation across the full supply range.
It uses advanced ALVC (Advanced Low-Voltage CMOS) silicon process to achieve rail-to-rail output swing, sub-3 ns tpd at 3.3 V, and ±24-mA drive capability while maintaining <10 µA ICC and <10 µA IOZ. Latch-up immunity exceeds 250 mA per JESD 17, and thermal resistance θJA is 83°C/W in the PW package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - supports mixed-voltage system interfacing (e.g., 1.8 V MCU to 3.3 V peripheral bus) |
| tpd Max | 2.8 ns at VCC = 3.3 V - enables high-speed data buffering in DDR control paths and address latching |
| IOL/IOH | ±24 mA at VCC = 3.0 V - drives heavy capacitive loads (e.g., >30 pF buses) without signal degradation |
| IOZ | ±10 µA at VCC = 3.6 V - ensures minimal leakage during 3-state hold, critical for low-power standby modes |
| ESD Rating | 2000-V HBM - protects against handling damage in automated PCB assembly and field service environments |
| θJA | 83°C/W (TSSOP-20 PW) - defines thermal derating limit for continuous operation at ambient up to 85°C |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade embedded control and communications equipment |
Pinout & Package
TSSOP-20 (PW) package: 6.5 mm × 4.4 mm body, 0.65 mm lead pitch, 1.2 mm max height, exposed pad not present. RoHS-compliant NiPdAu lead finish, MSL Level-1, 260°C peak reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Output-enable control inputs | Active-low enables respective 4-bit buffer group; must be pulled high via resistor during power-up to ensure safe 3-state default |
| 1A1–1A4, 2A1–2A4 | Data inputs | Non-inverting inputs for Group 1 (pins 2,4,6,8) and Group 2 (pins 19,17,15,13); accept 1.65–3.6 V logic levels |
| 1Y1–1Y4, 2Y1–2Y4 | 3-state outputs | Buffered outputs for each group; high-impedance when OE = high; rail-to-rail swing with ±24-mA drive |
| VCC (Pin 10), GND (Pin 11) | Power supply terminals | Single-supply operation only; decoupling capacitor (0.1 µF) required within 3 mm of VCC/GND pins |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | VOH ≥ VCC – 0.2 V and VOL ≤ 0.2 V at IOL = 4 mA - ensures noise margin >0.7 V in 3.3 V systems |
| Input threshold scaling | VIH/VIL track VCC (e.g., VIH = 0.65×VCC min at 1.65 V) - guarantees compatibility across 1.65–3.6 V supply points |
| Low dynamic power | Cpd = 26 pF per buffer at 3.3 V - reduces switching current and EMI in high-frequency bus applications |
| High noise immunity | Δt/Δv ≤ 5 ns/V input transition rate limit - suppresses false triggering from fast edge-induced crosstalk |
| Robust 3-state control | ten = 4.5 ns, tdis = 4.2 ns at VCC = 3.3 V - enables precise timing alignment in synchronous bus arbitration |
Applications
| Industrial PLC Backplane Interface | Embedded Microcontroller Bus Expansion |
|---|---|
Use Scenario: Isolating and driving 8-bit parallel control signals between a 3.3 V ARM Cortex-M4 and legacy 5 V I/O modules via level-shifting bus transceivers. IC Role / Device Role / Timing Role: Octal buffer providing direction-controlled signal conditioning and drive strength boost on the 3.3 V side of a bidirectional data bus. Use Value: Eliminates need for discrete level shifters; ±24-mA drive sustains signal integrity over 15 cm FR4 traces with 25 pF load. |
Use Scenario: Expanding GPIO count of a 1.8 V SoC by connecting external peripherals (ADCs, DACs, EEPROMs) via shared 8-bit data bus. IC Role / Device Role / Timing Role: 3-state buffer enabling time-multiplexed access to multiple peripherals without contention. Use Value: 2.8 ns tpd allows full bus cycle completion within 10 ns window at 100 MHz clock; low ICC (<10 µA) preserves SoC sleep current budget. |
| Automotive Body Control Module | Test Equipment Digital Pattern Generator |
Use Scenario: Driving LED driver ICs and relay control lines from a 3.3 V microcontroller in a vehicle door module operating at –40°C to +85°C. IC Role / Device Role / Timing Role: High-current buffer stage translating logic-level signals to robust 24-mA sink/source outputs for direct LED/analog switch control. Use Value: Guaranteed operation across full automotive temperature range; latch-up immunity >250 mA prevents failure during load dump events. |
Use Scenario: Generating synchronized 8-bit stimulus patterns for DUT testing, requiring precise edge timing and repeatable 3-state transitions. IC Role / Device Role / Timing Role: Output register staging digital vectors onto test bus with controlled enable/disable timing (ten/tdis ≤ 4.5 ns). Use Value: Sub-5 ns enable/disable skew enables deterministic pattern sequencing; low Cpd minimizes jitter from capacitive loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer/3-state driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC244APW | Higher VIH (2.0 V min at VCC = 3.3 V); identical PW package and pinout; 3.5 ns tpd vs. 2.8 ns | Less suitable for marginal 1.8 V input systems; same industrial temp range and drive strength | Choose SN74LVC244APW only if stricter input noise immunity is required and 0.7 ns speed penalty is acceptable. |
| 74AVC8T244PW | Lower VCC range (1.2 V to 3.6 V); 2.5 ns tpd; higher IOL (±28 mA); different pin mapping (OE on pins 1/19 vs. 1/2) | Supports 1.2 V core logic but requires PCB redesign due to non-pin-compatible layout | Choose 74AVC8T244PW only for new designs targeting ultra-low-voltage domains; not a drop-in replacement. |
Compared with SN74LVC244APW and 74AVC8T244PW, the SN74ALVC244PW uniquely balances 1.65–3.6 V universal supply support, 2.8 ns speed, and TSSOP-20 pinout compatibility - making it optimal for cost-sensitive industrial upgrades where existing layouts must be preserved.
Availability
SN74ALVC244PW is available at Aetrix Electronics and suitable for industrial PLC backplane interfaces, embedded microcontroller bus expansion, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74ALVC244PW 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 over 50 years of innovation in logic and interface solutions.
The SN74ALVC244PW belongs to TI's Advanced Low-Voltage CMOS (ALVC) logic family, engineered for high-speed, low-power 3-state buffering in mixed-voltage digital systems from 1.65 V to 3.6 V.
FAQ
What is the maximum operating frequency supported by the SN74ALVC244PW?
The SN74ALVC244PW does not specify a maximum clock frequency in its datasheet because it is a combinational buffer, not a clocked device. Its usable data rate is determined by propagation delay (tpd ≤ 2.8 ns at 3.3 V) and load capacitance. For a 30 pF bus load, it reliably supports data edges with rise/fall times >1 ns, enabling effective use in 100+ MHz bus applications when paired with appropriate drivers and terminations. The SN74ALVC244PW remains stable under these conditions per TI SCES188G test data.
Can the SN74ALVC244PW operate with a 1.8 V supply and interface with 3.3 V logic?
Yes, the SN74ALVC244PW operates from 1.65 V to 3.6 V and supports mixed-voltage interfacing. At VCC = 1.8 V, its VIH is guaranteed ≥1.17 V and VIL ≤0.63 V, allowing reliable recognition of 3.3 V logic-high signals (via current-limiting resistors or series termination). Its outputs swing rail-to-rail, so 1.8 V outputs can drive 3.3 V inputs only if those inputs are 1.8 V tolerant - otherwise, external level shifting is required. This behavior is fully documented in the SN74ALVC244PW recommended operating conditions table.
Is the SN74ALVC244PW pin-compatible with the SN74LVC244A?
Yes, the SN74ALVC244PW is pin-compatible with the SN74LVC244APW in the TSSOP-20 (PW) package: both share identical pin numbering, function assignment (1OE, 1A1–1A4, 1Y1–1Y4, GND, VCC, 2Y1–2Y4, 2A1–2A4, 2OE), and mechanical footprint. However, the SN74ALVC244PW offers faster tpd (2.8 ns vs. 3.5 ns) and lower VCC minimum (1.65 V vs. 1.65 V same), making it a performance upgrade without layout changes. This compatibility is confirmed in TI's ordering information tables and package drawings.
How should unused inputs be handled on the SN74ALVC244PW?
All unused inputs on the SN74ALVC244PW - including data inputs (1A1–1A4, 2A1–2A4) and OE controls (1OE, 2OE) - must be tied to a valid logic level (VCC or GND) to prevent floating nodes, increased ICC, and potential oscillation. TI explicitly recommends this in SCES188G Section "Recommended Operating Conditions" and Application Report SCBA004. Leaving inputs unconnected violates absolute maximum ratings and may cause erratic 3-state behavior or excessive power consumption. The SN74ALVC244PW exhibits no internal pull-ups or pull-downs on these pins.
Does the SN74ALVC244PW include built-in ESD protection?
Yes, the SN74ALVC244PW includes on-chip ESD protection circuits that exceed JESD 22 standards: 2000-V Human-Body Model (HBM), 200-V Machine Model (MM), and 1000-V Charged-Device Model (CDM). These values are measured per JEDEC test methods and published in the "Features" section of TI's SCES188G datasheet. This protection enables safe handling during board assembly and field service without requiring external TVS diodes for typical electrostatic discharge scenarios.
SN74ALVC244PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVC
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74ALVC244PW FAQ
1.How can I place an order for SN74ALVC244PW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVC244PW 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 SN74ALVC244PW reliable?
The price and inventory of SN74ALVC244PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVC244PW is usually 5 days.
3.What payment methods are accepted for SN74ALVC244PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALVC244PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ALVC244PW?
SN74ALVC244PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALVC244PW 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 SN74ALVC244PW?
For technical support, including SN74ALVC244PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVC244PW requirements.
6.How does Aetrix verify that SN74ALVC244PW is sourced from the original manufacturer or authorized distributors?
All SN74ALVC244PW 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 SN74ALVC244PW meets industry standards.
7.What is the process for return or replacement of SN74ALVC244PW?
All SN74ALVC244PW units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVC244PW, 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 SN74ALVC244PW part is unused and in its original packaging.
Return procedure for SN74ALVC244PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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