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Nexperia USA Inc. 74AHCT244PW,118
- Part No.:
- 74AHCT244PW,118
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74AHCT244PW,118.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,288
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Product details
Overview
74AHCT244PW,118 from Nexperia is an octal 3-state buffer/line driver with TTL-compatible inputs and dual independent output-enable controls (1OE, 2OE), operating from 4.5 V to 5.5 V supply. It provides eight bidirectional data paths split into two groups of four, supports mixed-voltage interfacing via overvoltage-tolerant inputs up to 5.5 V, and delivers 8 mA output drive at 5 V in industrial temperature range (–40 °C to +125 °C). It is used in bus buffering, address/data isolation, and level translation in microcontroller peripheral interfaces.
For engineers reviewing the 74AHCT244PW,118 datasheet, 74AHCT244PW,118 pinout, 74AHCT244PW,118 application, or 74AHCT244PW,118 equivalent, this device serves as a high-noise-immunity, low-power octal buffer for 5 V digital systems requiring precise timing control, 3-state bus management, and robust input tolerance-key considerations when selecting logic buffers for embedded control and industrial I/O expansion.
Technical Context
The 74AHCT244PW,118 implements two independent 4-bit non-inverting buffer sections, each controlled by its own active-low output enable (1OE for Y0–Y3, 2OE for Y4–Y7). Its TTL-level input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V) ensure compatibility with legacy 5 V TTL logic while maintaining CMOS power efficiency. The device features Schmitt-trigger action on all inputs, enhancing noise immunity in electrically noisy environments such as motor control or industrial PLC backplanes.
Propagation delay is tightly specified: tPD = 3.5–7.4 ns (typ/max) at VCC = 5 V and CL = 15 pF, with enable/disable times (ten/tdis) under 14.5 ns max. Input overvoltage tolerance to 5.5 V allows safe interfacing between 3.3 V controllers and 5 V buses without external clamping, simplifying mixed-supply system design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures reliable operation across standard 5 V rail tolerances and brown-out margins. |
| Input Thresholds | VIH ≥ 2.0 V, VIL ≤ 0.8 V - Guarantees full compatibility with TTL-family logic outputs and avoids marginal switching. |
| Output Drive | ±8 mA at VCC = 5 V - Sufficient to drive 50 pF loads with <10.5 ns propagation delay, supporting moderate-speed bus loading. |
| Propagation Delay | 3.5–7.4 ns (typ–max) at CL = 15 pF - Enables use in sub-100 MHz digital control paths without timing closure issues. |
| Operating Temperature | –40 °C to +125 °C - Qualified for under-hood automotive modules, industrial drives, and extended-temperature embedded systems. |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - Reduces risk of field failure during handling and board assembly in high-volume manufacturing. |
| Power Dissipation | ICC ≤ 80 μA (max) at VCC = 5.5 V - Enables low-quiescent-current operation in always-on subsystems like watchdog or status monitoring circuits. |
Pinout & Package
TSSOP20 package (SOT360-1): 20-pin thin shrink small outline, 4.4 mm body width, 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 (Y0–Y3) or Group 2 (Y4–Y7) to prevent bus contention. |
| 2, 4, 6, 8 | 1A0–1A3 | Group 1 input signals - Connect to MCU port pins or address lines needing isolated buffering. |
| 17, 15, 13, 11 | 2A0–2A3 | Group 2 input signals - Support dual-bus architectures (e.g., separate data/address lanes). |
| 18, 16, 14, 12 | 1Y0–1Y3 | Group 1 buffered outputs - Drive downstream 5 V logic with controlled rise/fall times and 3-state capability. |
| 3, 5, 7, 9 | 2Y0–2Y3 | Group 2 buffered outputs - Enable time-multiplexed or parallel bus expansion without signal coupling. |
| 10 | GND | Ground reference - Must be low-impedance connection to minimize ground bounce in high-speed switching. |
| 20 | VCC | Positive supply - Requires local 100 nF ceramic decoupling adjacent to pin for stable transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Overvoltage-tolerant inputs | Withstand up to 5.5 V regardless of VCC - Enables safe 3.3 V controller-to-5 V bus interfacing without level shifters. |
| Schmitt-trigger inputs | Hysteresis ≥ 0.5 V typical - Rejects noise spikes on long traces or in EMI-prone environments like factory automation. |
| Dual independent 3-state control | Separate 1OE/2OE pins - Allows selective bus arbitration (e.g., enable only memory interface while disabling peripherals). |
| Wide temperature qualification | –40 °C to +125 °C - Validated for under-chassis, power supply, and motor drive applications without derating. |
| Low dynamic power | CPD = 12 pF - Limits switching current in high-frequency clock distribution or data strobe paths. |
Applications
| Industrial PLC I/O Expansion | Microcontroller Bus Isolation |
|---|---|
|
Use Scenario: Isolating MCU GPIO banks from high-noise 24 V digital input modules and relay output drivers. IC Role / Device Role / Timing Role: Bidirectional buffer with 3-state control acts as a programmable gate between MCU and field-side logic, preventing backfeed and enabling hot-swap-safe I/O reconfiguration. Use Value: Schmitt-trigger inputs reject contact bounce and EMI; overvoltage tolerance eliminates external protection diodes on 24 V-sensed lines. |
Use Scenario: Separating a 32-bit ARM Cortex-M4's multiplexed address/data bus from external SRAM and FPGA peripherals. IC Role / Device Role / Timing Role: Octal buffer splits ALE-controlled address latching and data read/write paths, reducing capacitive loading on critical timing signals. Use Value: Sub-10 ns propagation delay preserves setup/hold margins; dual OE pins allow independent gating of address vs. data lanes. |
| Legacy System Level Translation | Test Equipment Signal Conditioning |
|
Use Scenario: Interfacing modern 3.3 V FPGAs with legacy 5 V TTL test fixtures and protocol analyzers. IC Role / Device Role / Timing Role: Level translator with directionless buffering - accepts 3.3 V inputs while driving 5 V loads, preserving signal integrity across voltage domains. Use Value: Input overvoltage tolerance prevents damage during hot-plug events; TTL-compatible thresholds ensure deterministic logic recognition. |
Use Scenario: Driving multiple parallel channels of DUT (device under test) control signals in automated test equipment (ATE) racks. IC Role / Device Role / Timing Role: Fanout buffer distributing synchronized enable, reset, and strobe signals to 8 DUT slots with matched skew. Use Value: Balanced propagation delays (<0.5 ns variation) ensure simultaneous activation; 3-state outputs support shared bus diagnostics. |
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 |
|---|---|---|---|
| SN74LVC244APWR | CMOS-input (1.65–3.6 V VCC), lower drive (24 mA), 3.3 V only - no 5 V operation. | Requires level-shifting for 5 V systems; better suited for 3.3 V-only designs with higher fanout needs. | Select when interfacing exclusively with 3.3 V logic and higher output current is required. |
| 74HCT244D,653 | SO20 package (SOT163-1), same electrical specs but larger footprint and higher thermal resistance (12.3 mW/K derating above 109 °C). | Preferred for through-hole prototyping or legacy PCBs with SO20 footprints; less suitable for space-constrained layouts. | Select when board layout mandates SO20 or thermal margin is sufficient with larger package. |
Compared with SN74LVC244APWR and 74HCT244D,653, the 74AHCT244PW,118 uniquely combines 5 V TTL compatibility, TSSOP20 compactness, and –40 °C to +125 °C qualification - making it optimal for new industrial designs where voltage interoperability, board area, and extended temperature resilience are jointly critical.
Availability
74AHCT244PW,118 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, microcontroller bus isolation, legacy system level translation, and test equipment signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74AHCT244PW,118 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 global semiconductor expert focused on high-volume, high-reliability logic, analog, and discrete components, with leadership in automotive-qualified and industrial-grade standard products.
The 74AHCT244PW,118 belongs to Nexperia's AHCT logic family, engineered specifically for robust 5 V TTL-compatible interfacing in harsh industrial and automotive-adjacent environments where noise immunity, wide temperature operation, and long-term supply stability are mandatory.
FAQ
Is the 74AHCT244PW,118 pin-compatible with the 74AHC244PW,118?
Yes, both share identical pinout, package (TSSOP20), and functional architecture. The key difference lies in input threshold levels: 74AHCT244PW,118 uses TTL-compatible VIH/VIL (2.0 V/0.8 V), while 74AHC244PW,118 uses CMOS thresholds (3.85 V/1.65 V at VCC = 5.5 V). Swapping requires verifying source logic family compatibility.
Can the 74AHCT244PW,118 safely interface a 3.3 V microcontroller with a 5 V peripheral bus?
Yes - its inputs tolerate up to 5.5 V regardless of VCC, allowing direct connection of 3.3 V GPIO outputs to its A0–A7 pins. When powered at 5 V, its outputs swing rail-to-rail (0 V/5 V), fully driving 5 V peripherals. No external level shifters are needed for this configuration.
What is the maximum capacitive load the 74AHCT244PW,118 can drive while maintaining timing specifications?
The datasheet specifies timing (tpd, ten, tdis) up to 50 pF load capacitance. At CL = 50 pF and VCC = 5 V, propagation delay remains ≤7.4 ns (typ) and ≤10.5 ns (max); enable/disable times stay within 14.5 ns (max). Exceeding 50 pF increases delay nonlinearly and may violate setup/hold timing in high-speed systems.
Does the TSSOP20 package (SOT360-1) require soldering the exposed thermal pad?
No - the datasheet states the thermal pad has no electrical or mechanical requirement to be soldered. If soldered, it must remain floating or connect to GND; it is not internally tied to any pin. Thermal performance is fully characterized without pad connection, and soldering is optional for additional mechanical stability only.
74AHCT244PW,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74AHCT
- 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74AHCT244PW,118 FAQ
1.How can I place an order for 74AHCT244PW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AHCT244PW,118 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 74AHCT244PW,118 reliable?
The price and inventory of 74AHCT244PW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT244PW,118 is usually 5 days.
3.What payment methods are accepted for 74AHCT244PW,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT244PW,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AHCT244PW,118?
74AHCT244PW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AHCT244PW,118 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 74AHCT244PW,118?
For technical support, including 74AHCT244PW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT244PW,118 requirements.
6.How does Aetrix verify that 74AHCT244PW,118 is sourced from the original manufacturer or authorized distributors?
All 74AHCT244PW,118 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 74AHCT244PW,118 meets industry standards.
7.What is the process for return or replacement of 74AHCT244PW,118?
All 74AHCT244PW,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT244PW,118, 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 74AHCT244PW,118 part is unused and in its original packaging.
Return procedure for 74AHCT244PW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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