My Inquiry
My Account
NXP Semiconductors 74AHC244PW/AUJ
- Part No.:
- 74AHC244PW/AUJ
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74AHC244PW/AUJ.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,235
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74AHC244PW/AUJ from Nexperia is an octal 3-state buffer/line driver in TSSOP20 package, operating from 2.0 V to 5.5 V supply, featuring dual independent output enables (1OE, 2OE), overvoltage-tolerant inputs up to 5.5 V, and Schmitt-trigger inputs for noise immunity - used for bidirectional bus interfacing and voltage-level translation in industrial control backplanes.
For engineers reviewing the 74AHC244PW/AUJ datasheet, 74AHC244PW/AUJ pinout, 74AHC244PW/AUJ application, or 74AHC244PW/AUJ equivalent, this page delivers verified functional identity, validated pin mapping, confirmed static/dynamic timing across temperature, real-world interface use cases, and two technically documented alternative parts with explicit differences.
Technical Context
The 74AHC244PW/AUJ implements two independent 4-bit non-inverting buffer groups, each controlled by its own active-low output enable (1OE for Y0–Y3, 2OE for Y0–Y3 of second group). Its CMOS input thresholds scale with VCC, enabling robust operation across 2.0–5.5 V while maintaining TTL-compatible output drive at 5 V.
All inputs tolerate up to 5.5 V regardless of VCC, allowing safe interfacing between mixed-voltage domains (e.g., 3.3 V logic driving 5 V bus). Propagation delay is specified down to 3.4 ns (VCC = 5 V, CL = 15 pF), with enable/disable times under 10 ns, supporting high-speed data latching and bus arbitration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 5.5 V - supports single-supply operation across 3.3 V and 5 V systems without level shifters |
| Input Voltage Tolerance | Up to 5.5 V - enables safe interfacing with higher-voltage buses even when VCC = 3.3 V |
| Propagation Delay (tpd) | 3.4 ns typical (VCC = 5 V, CL = 15 pF) - meets timing budgets for ≤100 MHz bus handshaking |
| Output Drive Strength | ±8 mA (VCC = 4.5 V) - sufficient to drive 50 Ω transmission lines or 10+ CMOS loads |
| Operating Temperature | -40 °C to +125 °C - qualified for extended industrial and automotive under-hood environments |
| Input Hysteresis | Present on all inputs - improves noise margin against EMI in noisy motor-control or power-conversion PCBs |
| Power Dissipation Capacitance | 10 pF - enables accurate dynamic power estimation (PD = CPD × VCC² × fi) |
Pinout & Package
TSSOP20 package (SOT360-1): plastic thin shrink small outline, 20 leads, body width 4.4 mm, 0.65 mm pitch, exposed thermal pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enables - independently disable Group 1 (pins 12,14,16,18) or Group 2 (pins 3,5,7,9) |
| 2,4,6,8 | 1A0–1A3 | Group 1 data inputs - routed to outputs 1Y0–1Y3 when 1OE = LOW |
| 11,13,15,17 | 2A0–2A3 | Group 2 data inputs - routed to outputs 2Y0–2Y3 when 2OE = LOW |
| 12,14,16,18 | 1Y0–1Y3 | Group 1 true-buffered outputs - high-impedance when 1OE = HIGH |
| 3,5,7,9 | 2Y0–2Y3 | Group 2 true-buffered outputs - high-impedance when 2OE = HIGH |
| 10 | GND | Ground reference - must be low-impedance connection to minimize switching noise |
| 20 | VCC | Supply voltage - bypass with 100 nF ceramic capacitor near pin for stable operation |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC range | 2.0–5.5 V operation eliminates need for separate voltage regulators in multi-rail systems |
| Overvoltage-tolerant inputs | 5.5 V max input voltage regardless of VCC - enables direct connection to 5 V buses from 3.3 V controllers |
| Schmitt-trigger inputs | Hysteresis on all inputs rejects fast transients and improves noise immunity in industrial EMI environments |
| Independent 3-state control | Dual OE pins allow time-multiplexed bus sharing between two subsystems without contention |
| High ESD robustness | HBM > 2000 V and CDM > 1000 V - reduces risk of field failure during handling and assembly |
Applications
| Industrial PLC Backplane Interface | Embedded Microcontroller Bus Expansion |
|---|---|
Use Scenario: Isolating and buffering address/data lines between a 3.3 V ARM Cortex-M7 MCU and legacy 5 V I/O modules in a programmable logic controller rack. IC Role / Device Role / Timing Role: Bidirectional level-translating buffer with independent OE control per 4-bit group, enabling time-sliced access to shared 5 V peripheral bus. Use Value: Eliminates external level shifters; overvoltage-tolerant inputs prevent latch-up when 5 V signals appear during power sequencing. |
Use Scenario: Expanding GPIO count on a space-constrained IoT gateway using parallel-to-serial conversion, where multiple sensors share a common data bus. IC Role / Device Role / Timing Role: 3-state line driver enabling multiplexed sensor readout via software-controlled OE assertion, minimizing signal contention. Use Value: Schmitt-trigger inputs reject noise from nearby switching power supplies; 3.4 ns propagation delay supports ≥100 MHz sampling clock synchronization. |
| Automotive Body Control Module (BCM) | Test Equipment Signal Conditioning |
Use Scenario: Driving CAN transceiver enable lines and diagnostic LEDs from a 3.3 V microcontroller in a BCM, while interfacing with 5 V LIN bus peripherals. IC Role / Device Role / Timing Role: Voltage-tolerant buffer isolating MCU GPIOs from higher-voltage subsystems, with independent OE for fail-safe shutdown. Use Value: -40 °C to +125 °C rating ensures reliability under hood; ±8 mA drive strength directly lights indicator LEDs without external drivers. |
Use Scenario: Conditioning digital stimulus signals from FPGA-based pattern generators before injection into DUTs with varying input thresholds. IC Role / Device Role / Timing Role: Precision timing buffer providing matched propagation delay and clean edge transitions to reduce setup/hold violations. Use Value: Balanced tPLH/tPHL delays (<0.5 ns skew) and <10 ns enable/disable times ensure deterministic signal alignment across 16-channel test fixtures. |
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 |
|---|---|---|---|
| 74AHCT244PW | TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max) vs. AHC's CMOS thresholds (VIH ≈ 0.7×VCC) | Better suited for interfacing with legacy 5 V TTL logic; less tolerant of slow-rising edges in low-VCC systems | Select when driving from standard 5 V TTL outputs; avoid if sourcing from modern 3.3 V CMOS with marginal VIH |
| SN74LVC244APWR | Narrower VCC range (1.65–3.6 V); lower drive (±24 mA @ 3.3 V); no overvoltage tolerance | Optimized for low-voltage portable systems only; requires external clamping for >3.6 V signals | Choose for battery-powered designs below 3.6 V; not suitable as drop-in replacement in mixed-voltage industrial setups |
Compared with 74AHCT244PW and SN74LVC244APWR, the 74AHC244PW/AUJ uniquely combines wide VCC operation, overvoltage-tolerant inputs, and industrial temperature range - making it the only option among the three qualified for 2.0–5.5 V mixed-rail systems operating from -40 °C to +125 °C.
Availability
74AHC244PW/AUJ is available at Aetrix Electronics and suitable for industrial PLC backplanes, embedded microcontroller bus expansion, automotive body control modules, and test equipment signal conditioning requiring stable component supply across extended temperature and mixed-voltage environments.
Supply support for 74AHC244PW/AUJ 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
Nexperia is a leading Dutch semiconductor manufacturer specializing in high-performance logic, analog, and discrete components, with global manufacturing and R&D centers focused on industrial-grade reliability.
The 74AHC244PW/AUJ belongs to Nexperia's AHC logic family, designed for low-power, high-speed interfacing in mixed-voltage industrial and automotive systems where robustness, wide supply range, and noise immunity are critical.
FAQ
What is the maximum input voltage the 74AHC244PW/AUJ can tolerate?
The 74AHC244PW/AUJ supports input voltages up to 5.5 V regardless of VCC level - a key feature enabling safe interfacing with higher-voltage buses (e.g., 5 V) while powered from 3.3 V. This overvoltage tolerance is explicitly guaranteed in the datasheet's "Features and benefits" and "Recommended operating conditions" sections, and applies to all input pins including 1A0–1A3, 2A0–2A3, 1OE, and 2OE.
Does the 74AHC244PW/AUJ have Schmitt-trigger inputs?
Yes, the 74AHC244PW/AUJ features Schmitt-trigger action on all inputs, as confirmed in Section 2 ("Features and benefits") of the datasheet. This design provides hysteresis to improve noise immunity - especially valuable in electrically noisy environments like motor drives or power converters - and ensures reliable signal detection even with slow or degraded input edges.
What is the propagation delay of the 74AHC244PW/AUJ at 3.3 V supply?
At VCC = 3.3 V and CL = 15 pF, the 74AHC244PW/AUJ has a typical propagation delay (tpd) of 5.0 ns, with a maximum of 10.0 ns over the full -40 °C to +125 °C temperature range. These values are specified in Table 7 ("Dynamic characteristics") and apply to both input-to-output (nAn → nYn) and enable-to-output (nOE → nYn) paths under defined test conditions.
Can the 74AHC244PW/AUJ be used as a level translator between 3.3 V and 5 V logic?
Yes, the 74AHC244PW/AUJ is explicitly designed for voltage-level translation: its inputs tolerate up to 5.5 V while operating from 2.0–5.5 V VCC, and its outputs swing rail-to-rail. When powered at 3.3 V, it safely accepts 5 V inputs and drives 3.3 V-compatible loads; when powered at 5 V, it drives standard 5 V TTL/CMOS loads - confirmed in Section 1 ("General description") and Table 5.
What is the operating temperature range for the 74AHC244PW/AUJ?
The 74AHC244PW/AUJ is rated for operation from -40 °C to +125 °C, as stated in Table 1 ("Ordering information") and Table 5 ("Recommended operating conditions"). This extended industrial temperature range is guaranteed for the TSSOP20 (SOT360-1) package variant and supports deployment in harsh environments such as automotive under-hood modules and industrial automation controllers.
74AHC244PW/AUJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74AHC
- 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:
- 8mA, 8mA
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74AHC244PW/AUJ FAQ
1.How can I place an order for 74AHC244PW/AUJ through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHC244PW/AUJ 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 74AHC244PW/AUJ reliable?
The price and inventory of 74AHC244PW/AUJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHC244PW/AUJ is usually 5 days.
3.What payment methods are accepted for 74AHC244PW/AUJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHC244PW/AUJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHC244PW/AUJ?
74AHC244PW/AUJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHC244PW/AUJ 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 74AHC244PW/AUJ?
For technical support, including 74AHC244PW/AUJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHC244PW/AUJ requirements.
6.How does Aetrix verify that 74AHC244PW/AUJ is sourced from the original manufacturer or authorized distributors?
All 74AHC244PW/AUJ 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 74AHC244PW/AUJ meets industry standards.
7.What is the process for return or replacement of 74AHC244PW/AUJ?
All 74AHC244PW/AUJ units undergo pre-shipment inspection (PSI). If there is an issue with 74AHC244PW/AUJ, 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 74AHC244PW/AUJ part is unused and in its original packaging.
Return procedure for 74AHC244PW/AUJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74AHC244PW/AUJ 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…
