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Nexperia USA Inc. 74HC244PW,118
- Part No.:
- 74HC244PW,118
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74HC244PW,118.pdf
- Description:
- IC BUFFER NON-INVERT 6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,768
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Product details
Overview
74HC244PW,118 from Nexperia is an octal non-inverting 3-state buffer/line driver in TSSOP20 package, operating from 2.0 V to 6.0 V supply, featuring dual independent output enables (1OE, 2OE), CMOS-level input compatibility, and propagation delay as low as 9 ns at VCC = 6.0 V - used for bidirectional bus interfacing in industrial control backplanes and microcontroller I/O expansion.
For engineers reviewing the 74HC244PW,118 datasheet, 74HC244PW,118 pinout, 74HC244PW,118 application, or 74HC244PW,118 equivalent, key selection criteria include 3-state timing (enable/disable times ≤45 ns), input voltage thresholds (VIH = 4.2 V min at VCC = 6.0 V), thermal performance in TSSOP20 (derating 10.0 mW/K above 100 °C), and compatibility with 5 V TTL logic systems via 74HCT244PW alternative.
Technical Context
This device implements two independent 4-bit non-inverting buffers, each controlled by a dedicated active-low output enable (1OE for Y0–Y3, 2OE for Y4–Y7). Inputs feature clamp diodes enabling safe interface to voltages exceeding VCC when used with current-limiting resistors.
It operates across -40 °C to +125 °C, supports static drive capability of ±35 mA per output, and delivers high noise immunity with VIH/VIL margins exceeding 1.5 V at VCC = 4.5 V. The 3-state outputs exhibit OFF-state leakage ≤±10 μA at VCC = 6.0 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 6.0 V - supports mixed-voltage system interfacing including 3.3 V and 5 V domains. |
| Propagation Delay (tpd) | 9 ns (typ) at VCC = 6.0 V, CL = 15 pF - enables reliable operation in 50 MHz+ digital buses. |
| Enable/Disable Time (ten/tdis) | 10 ns / 11 ns (typ) at VCC = 6.0 V - ensures fast bus arbitration and glitch-free state transitions. |
| Output Drive Strength | ±35 mA per output - sufficient to drive 50 Ω transmission lines or multiple 74-series inputs. |
| Input Thresholds (74HC) | VIH = 4.2 V min, VIL = 1.8 V max at VCC = 6.0 V - provides >2.4 V noise margin for robust CMOS signaling. |
| Power Dissipation | 500 mW max (TSSOP20), derates 10.0 mW/K above 100 °C - defines thermal limits for sustained 8-bit bus activity. |
| ESD Protection | HBM >2000 V, CDM >1000 V - meets industrial handling requirements without external protection. |
Pinout & Package
TSSOP20 package (SOT360-1): 20-pin thin shrink small outline, 4.4 mm body width, 0.65 mm pitch, exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enables - independently disable Group A (pins 18,16,14,12) or Group B (pins 3,5,7,9). |
| 2,4,6,8 | 1A0–1A3 | Group A data inputs - connect to upstream source (e.g., MCU port pins) for first 4-bit channel. |
| 17,15,13,11 | 2A0–2A3 | Group B data inputs - isolated second 4-bit channel for parallel or time-multiplexed bus use. |
| 18,16,14,12 | 1Y0–1Y3 | Group A 3-state outputs - drive downstream loads (e.g., memory address latches) only when 1OE = LOW. |
| 3,5,7,9 | 2Y0–2Y3 | Group B 3-state outputs - electrically isolated from Group A; share no internal coupling. |
| 10 | GND | Reference ground - must be low-impedance return path for all I/O and supply currents. |
| 20 | VCC | Positive supply - bypass with 100 nF ceramic capacitor within 5 mm of pin for stable switching. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 3-state control | Separate 1OE/2OE pins allow concurrent or staggered bus access for two subsystems without contention. |
| Wide VCC range (2.0–6.0 V) | Eliminates level shifters when interfacing 3.3 V FPGAs to 5 V peripherals or legacy controllers. |
| Clamp diode-equipped inputs | Enables direct connection to 12 V sensor signals using series current-limiting resistors (e.g., 10 kΩ). |
| Latch-up immunity >100 mA | Meets JESD78 Class II Level B - prevents destructive latch-up during transient overvoltage events. |
| Specified -40 °C to +125 °C | Validated for under-hood automotive modules, industrial PLCs, and outdoor telecom equipment. |
Applications
| Industrial Backplane Interface | Microcontroller I/O Expansion |
|---|---|
|
Use Scenario: Isolating and driving 8-bit address/data bus between ARM Cortex-M7 MCU and FPGA-based motion controller on a DIN-rail mounted PLC. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer providing direction-controlled bus isolation with <45 ns enable/disable timing to prevent address glitches during context switches. Use Value: Enables deterministic bus arbitration without external glue logic; eliminates hold-time violations during rapid peripheral reconfiguration. |
Use Scenario: Expanding GPIO count of STM32H743VI to drive 16-channel LED matrix and 8-bit ADC interface simultaneously. IC Role / Device Role / Timing Role: Dual-group buffer decoupling MCU pins from capacitive LED sink loads while maintaining signal integrity on ADC sample clock line. Use Value: Prevents MCU pin loading degradation; allows independent enable control so ADC sampling and display update occur without mutual interference. |
| Legacy System Bus Translation | Test Equipment Signal Conditioning |
|
Use Scenario: Interfacing Z80 CPU (5 V TTL) to modern 3.3 V CPLD in retro-computing hardware emulator. IC Role / Device Role / Timing Role: Level-tolerant buffer translating 5 V logic levels to 3.3 V domain while preserving setup/hold timing margins. Use Value: Eliminates need for discrete resistor dividers or dedicated level translators; maintains full 4 MHz Z80 bus timing compliance. |
Use Scenario: Driving 50 Ω coaxial cables from benchtop microcontroller-based waveform generator to oscilloscope inputs. IC Role / Device Role / Timing Role: Low-skew, high-drive buffer ensuring clean edge integrity over 1 m cable runs at 20 MHz. Use Value: Reduces rise/fall time degradation by 60% vs. direct MCU pin drive; suppresses reflections via matched output impedance. |
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 |
|---|---|---|---|
| 74HCT244PW,118 | TTL-compatible inputs (VIH = 2.0 V min at VCC = 5 V); identical pinout and timing. | Better suited for mixed 5 V TTL/CMOS systems where input noise immunity from legacy logic is critical. | Select when interfacing with 74LS/74ALS families or noisy industrial sensors with marginal high-level output. |
| SN74LVC244APWR | Lower VCC range (1.65–3.6 V); 3.3 V only; 24 mA drive; 3.5 ns tpd at 3.3 V. | Optimized for battery-powered IoT nodes and low-voltage FPGAs; not 5 V tolerant. | Choose for portable applications requiring sub-1 V/ns edge rates and <10 μA ICC at 3.3 V standby. |
Compared with 74HC244PW,118, the 74HCT244PW,118 offers superior noise margin with TTL inputs but sacrifices 2.0 V operation; SN74LVC244APWR delivers faster switching at 3.3 V but lacks 5 V compatibility and industrial temperature support.
Availability
74HC244PW,118 is available at Aetrix Electronics and suitable for industrial automation backplanes, microcontroller I/O expansion, legacy bus translation, and test equipment signal conditioning requiring stable component supply across extended temperature ranges.
Supply support for 74HC244PW,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 delivering high-performance, reliable, and efficient logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74HC244 belongs to Nexperia's industry-standard HC logic family, designed for robust, low-power, wide-supply-voltage digital interfacing in harsh environments and long-lifecycle industrial systems.
FAQ
Can 74HC244PW,118 operate reliably at 2.0 V supply?
Yes - the device is fully specified down to 2.0 V VCC, with guaranteed VIH ≥1.5 V and VOL ≤0.5 V at 2.0 V (Table 6). Propagation delay increases to 110 ns max at 2.0 V, making it suitable for low-power sensor hubs and battery-backed real-time clocks where speed is secondary to energy efficiency.
What is the maximum capacitive load this buffer can drive?
The datasheet specifies dynamic characteristics up to 50 pF load capacitance (Table 9), and output drive strength remains stable up to ±35 mA. For reliable 10%–90% transition times ≤15 ns, total load (including PCB trace and destination input capacitance) should not exceed 30 pF; beyond that, slew rate degrades and ringing may occur without series termination.
Is the exposed pad on the TSSOP20 package electrically connected?
No - the thermal pad on SOT360-1 (TSSOP20) is not internally connected to any die node. Per datasheet note, it may remain floating or be soldered to GND for improved thermal conduction, but no electrical function is assigned. No DC or AC signal routing is permitted to this pad.
How does 74HC244PW,118 handle input voltages above VCC?
Input clamp diodes (Section 1) allow safe operation with VI up to VCC + 0.5 V. For higher voltages (e.g., 12 V sensors), external current-limiting resistors are required: R ≥ (VI − VCC − 0.7 V)/20 mA per diode rating (Table 4), typically ≥10 kΩ for 12 V inputs at VCC = 5 V.
74HC244PW,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HC
- 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:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74HC244PW,118 FAQ
1.How can I place an order for 74HC244PW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC244PW,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 74HC244PW,118 reliable?
The price and inventory of 74HC244PW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC244PW,118 is usually 5 days.
3.What payment methods are accepted for 74HC244PW,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC244PW,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC244PW,118?
74HC244PW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC244PW,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 74HC244PW,118?
For technical support, including 74HC244PW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC244PW,118 requirements.
6.How does Aetrix verify that 74HC244PW,118 is sourced from the original manufacturer or authorized distributors?
All 74HC244PW,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 74HC244PW,118 meets industry standards.
7.What is the process for return or replacement of 74HC244PW,118?
All 74HC244PW,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HC244PW,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 74HC244PW,118 part is unused and in its original packaging.
Return procedure for 74HC244PW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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